From 037a25f6ca4874f3561f9ebf878058efd23c48f2 Mon Sep 17 00:00:00 2001 From: Karol Lewandowski Date: Mon, 22 Aug 2016 14:04:01 +0200 Subject: [PATCH 01/16] crash-pipe: Always return -errno on error Change-Id: I330b5366a5350cd9e8e54f4a04b7fa53f9122eca --- src/crash-pipe/crash-pipe.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/crash-pipe/crash-pipe.c b/src/crash-pipe/crash-pipe.c index d0177fa..8a3f99f 100644 --- a/src/crash-pipe/crash-pipe.c +++ b/src/crash-pipe/crash-pipe.c @@ -179,11 +179,12 @@ static int save_core(const char *core_path) int fd; static char buf[4096]; int readb, remaining; + int ret = 0; fd = open(core_path, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR); if (fd == -1) { syslog(LOG_ERR, "crash-pipe: Unable to save core file to %s: %m\n", core_path); - return -1; + return -errno; } while ((readb = read(STDIN_FILENO, buf, sizeof(buf))) > 0) { @@ -192,6 +193,7 @@ static int save_core(const char *core_path) for (n = 0, remaining = readb ; remaining > 0; remaining -= n) { n = write(fd, buf, remaining); if (n == -1) { + ret = -errno; syslog(LOG_ERR, "crash-pipe: Error while saving core file %s: %m. Removing core.\n", core_path); (void)unlink(core_path); // XXX check errors here too goto out; @@ -202,7 +204,7 @@ static int save_core(const char *core_path) out: close(fd); - return 0; + return ret; } -- 2.7.4 From 269790304eea1bde27644962efa7803c7ab611df Mon Sep 17 00:00:00 2001 From: Adrian Szyndela Date: Thu, 23 Jun 2016 15:00:28 +0200 Subject: [PATCH 02/16] crash-stack: unwinding by frame pointer on aarch64 To unwind call stack on aarch64 we need to use external method, as libelf 0.153 does not support unwinding yet. Possible methods are: - using libunwind; - manual walk with frame pointers; - heuristic unwind by inspecting data stack. This patch adds support for unwinding on aarch64 with frame pointers, along with changes needed to modularize unwinding. Change-Id: Ib2cee21277f6bc500046bf6e9d70cf19a733dca8 --- src/crash-stack/CMakeLists.txt | 9 +- src/crash-stack/crash-stack-aarch64.c | 74 +++++++++++++++ src/crash-stack/crash-stack-arm.c | 129 +++++---------------------- src/crash-stack/crash-stack-libelf-helpers.c | 117 ++++++++++++++++++++++++ src/crash-stack/crash-stack-libelf.c | 35 +++++++- src/crash-stack/crash-stack-x86_64.c | 23 +++++ src/crash-stack/crash-stack.c | 26 +++--- src/crash-stack/crash-stack.h | 8 ++ 8 files changed, 299 insertions(+), 122 deletions(-) create mode 100644 src/crash-stack/crash-stack-aarch64.c create mode 100644 src/crash-stack/crash-stack-libelf-helpers.c create mode 100644 src/crash-stack/crash-stack-x86_64.c diff --git a/src/crash-stack/CMakeLists.txt b/src/crash-stack/CMakeLists.txt index b11c4d0..cd30bc3 100644 --- a/src/crash-stack/CMakeLists.txt +++ b/src/crash-stack/CMakeLists.txt @@ -1,11 +1,16 @@ option(WITH_CORE_DUMP "builds with support for core dump files (with GPL2 license)") set(CRASH_STACK_BIN "crash-stack") -set(CRASH_STACK_SRCS crash-stack.c) +set(CRASH_STACK_SRCS crash-stack.c crash-stack-libelf-helpers.c) if (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "armv7l") set(CRASH_STACK_SRCS ${CRASH_STACK_SRCS} crash-stack-arm.c wind/unwarm.c wind/unwarm_thumb.c wind/unwarm_arm.c wind/unwarmmem.c) else() - set(CRASH_STACK_SRCS ${CRASH_STACK_SRCS} crash-stack-libelf.c) + if (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64") + set(CRASH_STACK_SRCS ${CRASH_STACK_SRCS} crash-stack-aarch64.c) + elseif (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64") + set(CRASH_STACK_SRCS ${CRASH_STACK_SRCS} crash-stack-libelf.c) + set(CRASH_STACK_SRCS ${CRASH_STACK_SRCS} crash-stack-x86_64.c) + endif() endif() add_executable(${CRASH_STACK_BIN} ${CRASH_STACK_SRCS}) diff --git a/src/crash-stack/crash-stack-aarch64.c b/src/crash-stack/crash-stack-aarch64.c new file mode 100644 index 0000000..f9cac96 --- /dev/null +++ b/src/crash-stack/crash-stack-aarch64.c @@ -0,0 +1,74 @@ +#include "crash-stack.h" +#include +#include + +static struct user_regs_struct g_registers; + +struct Regs { + Dwarf_Addr x29; + Dwarf_Addr x30; + Dwarf_Addr pc; + Dwarf_Addr sp; +}; + +#define REG_SP 32 +#define REG_PC 33 +#define REG_X29 29 +#define REG_X30 30 + +typedef struct Regs Regs; +static Regs g_regs; + +void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +{ + if (NULL != size) + *size = sizeof(g_registers); + return &g_registers; +} + +void crash_stack_set_ptrace_registers(void *regbuf) +{ + struct user_regs_struct *regs = regbuf; + + memcpy(get_place_for_register_value("sp", 0), ®s->sp, sizeof(regs->sp)); + memcpy(get_place_for_register_value("pc", 0), ®s->pc, sizeof(regs->pc)); + memcpy(get_place_for_register_value("x29", 0), ®s->regs[29], sizeof(regs->regs[29])); + memcpy(get_place_for_register_value("x30", 0), ®s->regs[30], sizeof(regs->regs[30])); +} + +void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +{ + callstack->elems = 0; + callstack->tab[callstack->elems++] = g_regs.pc; + callstack->tab[callstack->elems++] = g_regs.x30; + + bool end = false; + + do { + uint64_t newx29, newx30; + bool read29 = crash_stack_libelf_read_value(dwfl, core, pid, + g_regs.x29, + &newx29, sizeof(newx29), mappings); + bool read30 = crash_stack_libelf_read_value(dwfl, core, pid, + g_regs.x29 + sizeof(newx29), + &newx30, sizeof(newx30), mappings); + if (read29 && read30) { + callstack->tab[callstack->elems++] = newx30; + g_regs.x29 = newx29; + } + else end = true; + } while (!end); +} + +void *get_place_for_register_value(const char *regname, int regnum) +{ + if (strcmp(regname, "pc") == 0 || REG_PC == regnum) + return &g_regs.pc; + else if (strcmp(regname, "sp") == 0 || REG_SP == regnum) + return &g_regs.sp; + else if (strcmp(regname, "x29") == 0 || REG_X29 == regnum) + return &g_regs.x29; + else if (strcmp(regname, "x30") == 0 || REG_X30 == regnum) + return &g_regs.x30; + return NULL; +} diff --git a/src/crash-stack/crash-stack-arm.c b/src/crash-stack/crash-stack-arm.c index c1d2628..acb3ead 100644 --- a/src/crash-stack/crash-stack-arm.c +++ b/src/crash-stack/crash-stack-arm.c @@ -3,6 +3,7 @@ #include #include +#include static Elf *g_core = NULL; static Dwfl *g_dwfl = NULL; @@ -20,6 +21,15 @@ struct Regs { typedef struct Regs Regs; static Regs g_regs; +static struct user_regs g_ptrace_registers; + +void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +{ + if (NULL != size) + *size = sizeof(g_ptrace_registers); + return &g_ptrace_registers; +} + void *get_place_for_register_value(const char *regname, int regnum) { if (strcmp(regname, "pc") == 0 || REG_PC == regnum) @@ -35,6 +45,17 @@ void *get_place_for_register_value(const char *regname, int regnum) return NULL; } +void crash_stack_set_ptrace_registers(void *regbuf) +{ + struct user_regs *registers = regbuf; + int i; + for (i = 0; i < sizeof(registers->uregs)/sizeof(registers->uregs[0]); i++) { + void *regmem = get_place_for_register_value("", i); + if (NULL != regmem) + memcpy(regmem, ®isters->uregs[i], sizeof(registers->uregs[i])); + } +} + static Boolean report(void *data, Int32 address) { Callstack *callstack = (Callstack *)(data); @@ -45,68 +66,7 @@ static Boolean report(void *data, Int32 address) Boolean readT(Int32 a, void *v, size_t size) { - Dwfl_Module *module = 0; - Elf_Data *data = NULL; - - int segment = dwfl_addrsegment(g_dwfl, a, &module); - - if (module != NULL) { - Dwarf_Addr start; - dwfl_module_info(module, NULL, &start, NULL, NULL, NULL, NULL, NULL); - - GElf_Addr bias; - Elf *elf = dwfl_module_getelf(module, &bias); - - data = elf_getdata_rawchunk(elf, a-start, size, ELF_T_BYTE); - } - if (NULL == data && segment != -1) { - // get data from segment - GElf_Phdr mem; - GElf_Phdr *phdr; - Dwarf_Addr offset_in_segment; - - phdr = gelf_getphdr(g_core, segment, &mem); - if (phdr != NULL) { - offset_in_segment = a - phdr->p_vaddr; - if (offset_in_segment < phdr->p_filesz) { - Dwarf_Addr offset_in_file = phdr->p_offset + offset_in_segment; - - data = elf_getdata_rawchunk(g_core, offset_in_file, size, ELF_T_BYTE); - } - } - } - - if (NULL == data && module != NULL) { - const char *name = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, NULL, NULL); - if (name != NULL && name[0] == '[') { - int i; - // get module from mappings - for (i = 0; i < g_mappings->elems; i++) { - if (g_mappings->tab[i].m_start <= a && a < g_mappings->tab[i].m_end) { - // compute offset relative to the start of the mapping - Int32 offset = a - g_mappings->tab[i].m_start; - // read from the file, but also account file offset - data = elf_getdata_rawchunk(g_mappings->tab[i].m_elf, - offset + g_mappings->tab[i].m_offset, size, ELF_T_BYTE); - break; - } - } - } - } - - if (data != NULL) { - memcpy(v, data->d_buf, size); - return TRUE; - } - - /* Still no data, but we have a process - read memory with ptrace */ - if (NULL == data && g_pid > 1) { - long val = ptrace(PTRACE_PEEKDATA, g_pid, a, NULL); - memcpy(v, &val, size); - return TRUE; - } - - return FALSE; + return crash_stack_libelf_read_value(g_dwfl, g_core, g_pid, a, v, size, g_mappings); } static Boolean readW(Int32 a, Int32 *v) @@ -126,50 +86,7 @@ static Boolean readB(Int32 a, Int8 *v) static Int32 getProloguePC(Int32 current_pc) { - Int32 result = 0; - Dwfl_Module *module = dwfl_addrmodule(g_dwfl, current_pc); - if (module) { - // GElf_Off offset; - GElf_Sym sym; - // dwfl_module_addrinfo (module, current_pc, &offset, &sym, NULL, NULL, NULL); - dwfl_module_addrsym(module, current_pc, &sym, NULL); - // result = current_pc - offset; - result = sym.st_value; - } - if (0 == result) { - int i; - for (i = 0; i < g_mappings->elems; i++) { - if (g_mappings->tab[i].m_start <= current_pc && current_pc < g_mappings->tab[i].m_end) { - /* go through symbols to find the nearest */ - Elf_Scn *scn = NULL; - Elf *elf = g_mappings->tab[i].m_elf; - while ((scn = elf_nextscn(elf, scn)) != NULL) { - GElf_Shdr shdr_mem; - GElf_Shdr *shdr = gelf_getshdr(scn, &shdr_mem); - if (shdr != NULL && (shdr->sh_type == SHT_SYMTAB || shdr->sh_type == SHT_DYNSYM)) { - Elf_Data *sdata = elf_getdata(scn, NULL); - unsigned int nsyms = sdata->d_size / (gelf_getclass(elf) == ELFCLASS32 ? - sizeof(Elf32_Sym) : - sizeof(Elf64_Sym)); - unsigned int cnt; - uintptr_t address_offset = current_pc; - if (shdr->sh_type == SHT_DYNSYM) - address_offset -= g_mappings->tab[i].m_start; - for (cnt = 0; cnt < nsyms; ++cnt) { - GElf_Sym sym_mem; - Elf32_Word xndx; - GElf_Sym *sym = gelf_getsymshndx(sdata, NULL, cnt, &sym_mem, &xndx); - if (sym != NULL && sym->st_shndx != SHN_UNDEF) { - if (sym->st_value <= address_offset && address_offset < sym->st_value + sym->st_size) - return sym->st_value; - } - } - } - } - } - } - } - return result; + return crash_stack_libelf_get_prologue_pc(g_dwfl, current_pc, g_mappings); } void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) diff --git a/src/crash-stack/crash-stack-libelf-helpers.c b/src/crash-stack/crash-stack-libelf-helpers.c new file mode 100644 index 0000000..7dab540 --- /dev/null +++ b/src/crash-stack/crash-stack-libelf-helpers.c @@ -0,0 +1,117 @@ +#include "crash-stack.h" +#include +#include +#include + +bool crash_stack_libelf_read_value(Dwfl *dwfl, Elf *core, pid_t pid, + Dwarf_Addr a, void *v, size_t size, + Mappings *mappings) +{ + Dwfl_Module *module = 0; + Elf_Data *data = NULL; + + int segment = dwfl_addrsegment(dwfl, a, &module); + + if (module != NULL) { + Dwarf_Addr start; + dwfl_module_info(module, NULL, &start, NULL, NULL, NULL, NULL, NULL); + + GElf_Addr bias; + Elf *elf = dwfl_module_getelf(module, &bias); + + data = elf_getdata_rawchunk(elf, a-start, size, ELF_T_BYTE); + } + if (NULL == data && segment != -1) { + // get data from segment + GElf_Phdr mem; + GElf_Phdr *phdr = gelf_getphdr(core, segment, &mem); + Dwarf_Addr offset_in_segment = a - phdr->p_vaddr; + if (offset_in_segment < phdr->p_filesz) { + Dwarf_Addr offset_in_file = phdr->p_offset + offset_in_segment; + + data = elf_getdata_rawchunk(core, offset_in_file, size, ELF_T_BYTE); + } + } + + if (NULL == data && module != NULL) { + const char *name = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, NULL, NULL); + if (name != NULL && name[0] == '[') { + int i; + // get module from mappings + for (i = 0; i < mappings->elems; i++) { + if (mappings->tab[i].m_start <= a && a < mappings->tab[i].m_end) { + // compute offset relative to the start of the mapping + long offset = a - mappings->tab[i].m_start; + // read from the file, but also account file offset + data = elf_getdata_rawchunk(mappings->tab[i].m_elf, + offset + mappings->tab[i].m_offset, size, ELF_T_BYTE); + break; + } + } + } + } + + if (data != NULL) { + memcpy(v, data->d_buf, size); + return true; + } + + /* Still no data, but we have a process - read memory with ptrace */ + /* FIXME need to know if we are still in the mapped area */ + /* Bigger issue is that dwfl does not have modules */ + if (pid > 1) { + long val = ptrace(PTRACE_PEEKDATA, pid, a, NULL); + if (-1 == val && errno) + return false; + memcpy(v, &val, size); + return true; + } + + return false; +} + +Dwarf_Addr crash_stack_libelf_get_prologue_pc(Dwfl *dwfl, Dwarf_Addr current_pc, Mappings *mappings) +{ + Dwarf_Addr result = 0; + Dwfl_Module *module = dwfl_addrmodule(dwfl, current_pc); + if (module) { + GElf_Sym sym; + dwfl_module_addrsym(module, current_pc, &sym, NULL); + result = sym.st_value; + } + if (0 == result) { + int i; + for (i=0; i < mappings->elems; i++) { + if (mappings->tab[i].m_start <= current_pc && current_pc < mappings->tab[i].m_end) { + /* go through symbols to find the nearest */ + Elf_Scn *scn = NULL; + Elf *elf = mappings->tab[i].m_elf; + while ((scn = elf_nextscn(elf, scn)) != NULL) { + GElf_Shdr shdr_mem; + GElf_Shdr *shdr = gelf_getshdr(scn, &shdr_mem); + if (shdr != NULL && (shdr->sh_type == SHT_SYMTAB || shdr->sh_type == SHT_DYNSYM)) { + Elf_Data *sdata = elf_getdata(scn, NULL); + unsigned int nsyms = sdata->d_size / (gelf_getclass(elf) == ELFCLASS32 ? + sizeof(Elf32_Sym) : + sizeof(Elf64_Sym)); + unsigned int cnt; + uintptr_t address_offset = current_pc; + if (shdr->sh_type == SHT_DYNSYM) + address_offset -= mappings->tab[i].m_start; + for (cnt = 0; cnt < nsyms; ++cnt) { + GElf_Sym sym_mem; + Elf32_Word xndx; + GElf_Sym *sym = gelf_getsymshndx(sdata, NULL, cnt, &sym_mem, &xndx); + if (sym != NULL && sym->st_shndx != SHN_UNDEF) { + if (sym->st_value <= address_offset && address_offset < sym->st_value + sym->st_size) { + return sym->st_value; + } + } + } + } + } + } + } + } + return result; +} diff --git a/src/crash-stack/crash-stack-libelf.c b/src/crash-stack/crash-stack-libelf.c index f4c10bc..b152bea 100644 --- a/src/crash-stack/crash-stack-libelf.c +++ b/src/crash-stack/crash-stack-libelf.c @@ -1,6 +1,16 @@ #include "crash-stack.h" #include #include +#include + +typedef union { + uint16_t reg16; + uint32_t reg32; + uint64_t reg64; +} Register; + +static Register g_pc; +static Register g_sp; #if _ELFUTILS_PREREQ(0, 158) static int frame_callback(Dwfl_Frame *state, void *arg) @@ -19,9 +29,32 @@ static int thread_callback(Dwfl_Thread *thread, void *thread_arg) } #endif +static const char *pc_names[] = { + "pc", "rip", "eip", "ip" +}; + +static const char *sp_names[] = { + "sp", "rsp", "esp" +}; + +static bool is_in(const char *name, const char **names, int elems) +{ + int nit; + for (nit = 0; nit < elems; ++nit) { + if (strcmp(name, names[nit]) == 0) + return true; + } + return false; +} + +#define IS_IN(name,names) is_in((name), (names), sizeof(names)/sizeof(names[0])) + void *get_place_for_register_value(const char *regname, int regnum) { - return 0; + if (IS_IN(regname, pc_names)) return &g_pc; + else if (IS_IN(regname, sp_names)) return &g_sp; + + return 0; } void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) diff --git a/src/crash-stack/crash-stack-x86_64.c b/src/crash-stack/crash-stack-x86_64.c new file mode 100644 index 0000000..934ee72 --- /dev/null +++ b/src/crash-stack/crash-stack-x86_64.c @@ -0,0 +1,23 @@ +#include "crash-stack.h" +#include +#include + +struct user_regs_struct g_registers; + +void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +{ + if (NULL != size) + *size = sizeof(g_registers); + return &g_registers; +} + +void crash_stack_set_ptrace_registers(void *regbuf) +{ + void *rsp = get_place_for_register_value("rsp", 0); + void *rip = get_place_for_register_value("rip", 0); + + struct user_regs_struct *regs = regbuf; + + memcpy(rsp, ®s->rsp, sizeof(regs->rsp)); + memcpy(rip, ®s->rip, sizeof(regs->rip)); +} diff --git a/src/crash-stack/crash-stack.c b/src/crash-stack/crash-stack.c index 609ac2f..916f645 100644 --- a/src/crash-stack/crash-stack.c +++ b/src/crash-stack/crash-stack.c @@ -62,9 +62,19 @@ static int module_callback(Dwfl_Module *module, void **userdata, static void getvalue(Elf *core, const void *from, size_t size, void *to) { + Elf_Type type = ELF_T_BYTE; + switch (size) { + case 8: type = ELF_T_BYTE; break; + case 16: type = ELF_T_HALF; break; + case 32: type = ELF_T_WORD; break; + case 64: type = ELF_T_XWORD; break; + default: + fprintf(stderr, "getvalue for strange size: %llu\n", (unsigned long long)size); + break; + } Elf_Data out = { .d_buf = to, - .d_type = size == 32 ? ELF_T_WORD : ELF_T_XWORD, + .d_type = type, .d_version = EV_CURRENT, .d_size = size/8, .d_off = 0, @@ -282,25 +292,15 @@ static Dwfl *open_dwfl_with_core(Elf *core, const char *core_file_name) static int get_registers_ptrace(pid_t pid) { struct iovec data; - uintptr_t regbuf[20]; - - data.iov_base = regbuf; - data.iov_len = sizeof(regbuf); + data.iov_base = crash_stack_get_memory_for_ptrace_registers( &data.iov_len ); if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &data) != 0) { fprintf(errfile, "PTRACE_GETREGSET failed on PID %d: %m\n", pid); return -1; } - size_t i; - for (i = 0; - i * sizeof(regbuf[0]) < data.iov_len && i < sizeof(regbuf)/sizeof(regbuf[0]); - i++) { - void *reg = get_place_for_register_value("", i); + crash_stack_set_ptrace_registers(data.iov_base); - if (NULL != reg) - memcpy(reg, ®buf[i], sizeof(regbuf[i])); - } return 0; } diff --git a/src/crash-stack/crash-stack.h b/src/crash-stack/crash-stack.h index bf712c0..195bce5 100644 --- a/src/crash-stack/crash-stack.h +++ b/src/crash-stack/crash-stack.h @@ -31,4 +31,12 @@ typedef struct Mappings { void *get_place_for_register_value(const char *regname, int regnum); void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack); +Dwarf_Addr crash_stack_libelf_get_prologue_pc(Dwfl *dwfl, Dwarf_Addr current_pc, Mappings *mappings); +bool crash_stack_libelf_read_value(Dwfl *dwfl, Elf *core, pid_t pid, + Dwarf_Addr a, void *v, size_t size, + Mappings *mappings); + +void *crash_stack_get_memory_for_ptrace_registers(size_t *size); +void crash_stack_set_ptrace_registers(void *regbuf); + #endif /* CRASH_STACK_H */ -- 2.7.4 From f29763ccb1cf24bea7807b55ecd9722e3cb03743 Mon Sep 17 00:00:00 2001 From: Adrian Szyndela Date: Thu, 23 Jun 2016 15:01:27 +0200 Subject: [PATCH 03/16] crash-stack: adding fallback heuristic method for unwinding In case no better method is ready or available, this method may yield some useful results. It simply walks over data stack and checks word after word if it looks like an address from any function. All such addresses are considered as call stack functions. It should generally show all the called functions that left any trace on the stack. However, among those there may be a number of false positives. This is currently used for x86* architectures. Change-Id: I0ce28260ed9a6c51b925e1041a3496c1959cab1f --- src/crash-stack/crash-stack-libelf.c | 58 ++++++++++++++++++++++++++++++++---- 1 file changed, 53 insertions(+), 5 deletions(-) diff --git a/src/crash-stack/crash-stack-libelf.c b/src/crash-stack/crash-stack-libelf.c index b152bea..f346b95 100644 --- a/src/crash-stack/crash-stack-libelf.c +++ b/src/crash-stack/crash-stack-libelf.c @@ -12,7 +12,7 @@ typedef union { static Register g_pc; static Register g_sp; -#if _ELFUTILS_PREREQ(0, 158) +#if _ELFUTILS_PREREQ(0,158) static int frame_callback(Dwfl_Frame *state, void *arg) { Callstack *callstack = (Callstack*)arg; @@ -51,17 +51,65 @@ static bool is_in(const char *name, const char **names, int elems) void *get_place_for_register_value(const char *regname, int regnum) { - if (IS_IN(regname, pc_names)) return &g_pc; - else if (IS_IN(regname, sp_names)) return &g_sp; + if (IS_IN(regname, pc_names)) return &g_pc; + else if (IS_IN(regname, sp_names)) return &g_sp; - return 0; + return 0; +} + +void explore_stack_in_search_of_functions(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +{ + Dwarf_Addr stack_pointer = sizeof(uintptr_t) == 4 ? g_sp.reg32 : g_sp.reg64; + Dwarf_Addr stack_max_lookup = stack_pointer + 8*1024*1024; + bool data_remaining = true; + do { + uintptr_t value; + data_remaining = crash_stack_libelf_read_value(dwfl, core, pid, stack_pointer, &value, sizeof(value), mappings); + if (data_remaining) + { + Dwarf_Addr bias; + /* check presence of address in text sections */ + Dwfl_Module *module = dwfl_addrmodule(dwfl, value); + if (module != NULL) + { + Dwarf_Addr elfval = value; + GElf_Sym sym; + GElf_Word shndxp = -1; + dwfl_module_addrsym(module, value, &sym, &shndxp); + Elf_Scn *scn = dwfl_module_address_section(module, &elfval, &bias); + if (scn != 0 || shndxp != -1) + { + callstack->tab[callstack->elems++] = value; + if (callstack->elems >= MAX_CALLSTACK_LEN) + return; + } + else + { + /* check also inside [pie] and [exe] */ + int i; + for (i = 0; i < mappings->elems; i++) + { + if (mappings->tab[i].m_start <= elfval && elfval < mappings->tab[i].m_end) + { + callstack->tab[callstack->elems++] = value; + break; + } + } + } + } + } + stack_pointer += sizeof(uintptr_t); + } while (data_remaining && stack_pointer < stack_max_lookup ); } void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) { callstack->elems = 0; -#if _ELFUTILS_PREREQ(0, 158) +#if _ELFUTILS_PREREQ(0,158) dwfl_getthreads(dwfl, thread_callback, callstack); +#else + callstack->tab[callstack->elems++] = sizeof(uintptr_t) == 4 ? g_pc.reg32 : g_pc.reg64; + explore_stack_in_search_of_functions(dwfl, core, pid, mappings, callstack); #endif } -- 2.7.4 From 11c142a267540ee070db0c8c1dc47c022edd02a6 Mon Sep 17 00:00:00 2001 From: Adrian Szyndela Date: Thu, 25 Aug 2016 12:17:00 +0200 Subject: [PATCH 04/16] Fixed coding style & added doxygen docs Change-Id: I10fef06201d4ef101635d6be410345c22273357c --- packaging/crash-worker.spec | 20 + src/crash-stack/CMakeLists.txt | 8 + src/crash-stack/crash-stack-aarch64.c | 54 +- src/crash-stack/crash-stack-arm.c | 127 +- src/crash-stack/crash-stack-libelf-helpers.c | 27 +- src/crash-stack/crash-stack-libelf.c | 123 +- src/crash-stack/crash-stack-x86_64.c | 31 +- src/crash-stack/crash-stack.c | 244 ++- src/crash-stack/crash-stack.doxygen.in | 2384 ++++++++++++++++++++++++++ src/crash-stack/crash-stack.h | 138 +- 10 files changed, 3007 insertions(+), 149 deletions(-) create mode 100644 src/crash-stack/crash-stack.doxygen.in diff --git a/packaging/crash-worker.spec b/packaging/crash-worker.spec index 85de3d7..a7c8168 100644 --- a/packaging/crash-worker.spec +++ b/packaging/crash-worker.spec @@ -1,6 +1,7 @@ %define sys_assert on %define crash_popup off +%bcond_with doc Name: crash-worker Summary: Crash-manager @@ -19,6 +20,9 @@ BuildRequires: pkgconfig(libunwind) BuildRequires: libelf-devel libelf BuildRequires: libebl-devel libebl BuildRequires: libdw-devel libdw +%if %{with doc} +BuildRequires: doxygen +%endif Requires(post): coreutils Requires(post): tar @@ -34,6 +38,15 @@ Requires: /usr/bin/dbus-send %description crash-manager +%if %{with doc} +%package doc +Summary: Documentation package for crash-worker +Group: Framework/System + +%description doc +This package provides development documentation for crash-worker. +%endif + %prep %setup -q @@ -76,6 +89,9 @@ export CFLAGS+=" -Werror" # -DWITH_CORE_DUMP=ON make %{?jobs:-j%jobs} +%if %{with doc} +make doc +%endif %install rm -rf %{buildroot} @@ -129,3 +145,7 @@ sed -i "/${pattern}/D" %{_sysconfdir}/ld.so.preload %{_libexecdir}/crash-pipe %{_libexecdir}/crash-stack +%if %{with doc} +%files doc +%{_datadir}/doc/crash-worker +%endif diff --git a/src/crash-stack/CMakeLists.txt b/src/crash-stack/CMakeLists.txt index cd30bc3..9996803 100644 --- a/src/crash-stack/CMakeLists.txt +++ b/src/crash-stack/CMakeLists.txt @@ -26,3 +26,11 @@ endif() target_link_libraries(${CRASH_STACK_BIN} dw elf ebl dl stdc++) install(TARGETS ${CRASH_STACK_BIN} DESTINATION libexec) + +# doxygen docs +find_package(Doxygen) +if (DOXYGEN_FOUND) + configure_file(${CMAKE_CURRENT_SOURCE_DIR}/crash-stack.doxygen.in ${CMAKE_CURRENT_BINARY_DIR}/crash-stack.doxygen @ONLY) + add_custom_target(doc ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/crash-stack.doxygen WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} COMMENT "Generating Doxygen docs" VERBATIM) + install(DIRECTORY html DESTINATION share/doc/crash-worker/crash-stack) +endif (DOXYGEN_FOUND) diff --git a/src/crash-stack/crash-stack-aarch64.c b/src/crash-stack/crash-stack-aarch64.c index f9cac96..19b8c82 100644 --- a/src/crash-stack/crash-stack-aarch64.c +++ b/src/crash-stack/crash-stack-aarch64.c @@ -1,32 +1,56 @@ +/* + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack-aarch64.c + * @brief unwinding call stacks, functions specific for aarch64 + */ #include "crash-stack.h" #include #include -static struct user_regs_struct g_registers; +static struct user_regs_struct g_registers; ///< static storage for ptrace buffer for registers +/** + * @brief Important registers for unwinding stack on aarch64 + */ struct Regs { - Dwarf_Addr x29; - Dwarf_Addr x30; - Dwarf_Addr pc; - Dwarf_Addr sp; + Dwarf_Addr x29; ///< x29 register contains frame pointer + Dwarf_Addr x30; ///< x30 register contains return address + Dwarf_Addr pc; ///< register: program counter + Dwarf_Addr sp; ///< register: stack pointer }; -#define REG_SP 32 -#define REG_PC 33 -#define REG_X29 29 -#define REG_X30 30 +#define REG_SP 32 ///< number of stack pointer register +#define REG_PC 33 ///< number of program counter register +#define REG_X29 29 ///< number of x29 register +#define REG_X30 30 ///< number of x30 register -typedef struct Regs Regs; -static Regs g_regs; +typedef struct Regs Regs; ///< convenience type definition +static Regs g_regs; ///< static storage for target register values -void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +void *_crash_stack_get_memory_for_ptrace_registers(size_t *size) { if (NULL != size) *size = sizeof(g_registers); return &g_registers; } -void crash_stack_set_ptrace_registers(void *regbuf) +void _crash_stack_set_ptrace_registers(void *regbuf) { struct user_regs_struct *regs = regbuf; @@ -36,7 +60,7 @@ void crash_stack_set_ptrace_registers(void *regbuf) memcpy(get_place_for_register_value("x30", 0), ®s->regs[30], sizeof(regs->regs[30])); } -void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +void _create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) { callstack->elems = 0; callstack->tab[callstack->elems++] = g_regs.pc; @@ -60,7 +84,7 @@ void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Ca } while (!end); } -void *get_place_for_register_value(const char *regname, int regnum) +void *_get_place_for_register_value(const char *regname, int regnum) { if (strcmp(regname, "pc") == 0 || REG_PC == regnum) return &g_regs.pc; diff --git a/src/crash-stack/crash-stack-arm.c b/src/crash-stack/crash-stack-arm.c index acb3ead..7ad3b9b 100644 --- a/src/crash-stack/crash-stack-arm.c +++ b/src/crash-stack/crash-stack-arm.c @@ -1,3 +1,25 @@ +/* + * + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack-arm.c + * @brief unwinding call stacks, functions specific for ARM + */ #include "crash-stack.h" #include "wind/unwarm.h" @@ -5,32 +27,35 @@ #include #include -static Elf *g_core = NULL; -static Dwfl *g_dwfl = NULL; -static Mappings *g_mappings = NULL; -static pid_t g_pid = 0; +static Elf *g_core = NULL; ///< core file handler +static Dwfl *g_dwfl = NULL; ///< dwfl handler +static Mappings *g_mappings = NULL; ///< pointer to mappings database +static pid_t g_pid = 0; ///< PID of analyzed program +/** + * @brief Important registers for unwinding stack on ARM + */ struct Regs { - Dwarf_Addr regs[REGS_REGULAR_NUM]; - Dwarf_Addr sp; - Dwarf_Addr lr; - Dwarf_Addr pc; - Dwarf_Addr spsr; + Dwarf_Addr regs[REGS_REGULAR_NUM]; ///< regular registers + Dwarf_Addr sp; ///< register: stack pointer + Dwarf_Addr lr; ///< register: link register + Dwarf_Addr pc; ///< register: program counter + Dwarf_Addr spsr; ///< register: status register }; -typedef struct Regs Regs; -static Regs g_regs; +typedef struct Regs Regs; ///< convenience type definition +static Regs g_regs; ///< static storage for target register values -static struct user_regs g_ptrace_registers; +static struct user_regs g_ptrace_registers; ///< static storage for ptrace buffer for registers -void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +void *_crash_stack_get_memory_for_ptrace_registers(size_t *size) { if (NULL != size) *size = sizeof(g_ptrace_registers); return &g_ptrace_registers; } -void *get_place_for_register_value(const char *regname, int regnum) +void *_get_place_for_register_value(const char *regname, int regnum) { if (strcmp(regname, "pc") == 0 || REG_PC == regnum) return &g_regs.pc; @@ -45,18 +70,24 @@ void *get_place_for_register_value(const char *regname, int regnum) return NULL; } -void crash_stack_set_ptrace_registers(void *regbuf) +void _crash_stack_set_ptrace_registers(void *regbuf) { struct user_regs *registers = regbuf; int i; for (i = 0; i < sizeof(registers->uregs)/sizeof(registers->uregs[0]); i++) { - void *regmem = get_place_for_register_value("", i); + void *regmem = _get_place_for_register_value("", i); if (NULL != regmem) memcpy(regmem, ®isters->uregs[i], sizeof(registers->uregs[i])); } } -static Boolean report(void *data, Int32 address) +/** + * @brief Callback function for McTernan's unwinder - call stack frame reporting + * + * @param data pointer to call stack database + * @param address return address of the function in the reported call frame + */ +static Boolean __report(void *data, Int32 address) { Callstack *callstack = (Callstack *)(data); callstack->tab[callstack->elems++] = address; @@ -64,39 +95,69 @@ static Boolean report(void *data, Int32 address) return callstack->elems < MAX_CALLSTACK_LEN ? TRUE : FALSE; } -Boolean readT(Int32 a, void *v, size_t size) +/** + * @brief Helper function for reading values from target memory + * + * @param a target address to read from + * @param v destination address to copy data to + * @param size of the value + */ +static Boolean __readT(Int32 a, void *v, size_t size) { - return crash_stack_libelf_read_value(g_dwfl, g_core, g_pid, a, v, size, g_mappings); + return _crash_stack_libelf_read_value(g_dwfl, g_core, g_pid, a, v, size, g_mappings); } -static Boolean readW(Int32 a, Int32 *v) +/** + * @brief Callback function for McTernan's unwinder - reading 32 bits + * + * @param a target address to read from + * @param v destination address to copy data to + */ +static Boolean __readW(Int32 a, Int32 *v) { - return readT(a, v, sizeof(*v)); + return __readT(a, v, sizeof(*v)); } -static Boolean readH(Int32 a, Int16 *v) +/** + * @brief Callback function for McTernan's unwinder - reading 16 bits + * + * @param a target address to read from + * @param v destination address to copy data to + */ +static Boolean __readH(Int32 a, Int16 *v) { - return readT(a, v, sizeof(*v)); + return __readT(a, v, sizeof(*v)); } -static Boolean readB(Int32 a, Int8 *v) +/** + * @brief Callback function for McTernan's unwinder - reading 8 bits + * + * @param a target address to read from + * @param v destination address to copy data to + */ +static Boolean __readB(Int32 a, Int8 *v) { - return readT(a, v, sizeof(*v)); + return __readT(a, v, sizeof(*v)); } -static Int32 getProloguePC(Int32 current_pc) +/** + * @brief Callback function for McTernan's unwinder - trying to find function prologue + * + * @param current_pc address from inside of some function from target memory + */ +static Int32 __getProloguePC(Int32 current_pc) { - return crash_stack_libelf_get_prologue_pc(g_dwfl, current_pc, g_mappings); + return _crash_stack_libelf_get_prologue_pc(g_dwfl, current_pc, g_mappings); } -void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +void _create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) { UnwindCallbacks callbacks = { - report, - readW, - readH, - readB, - getProloguePC + __report, + __readW, + __readH, + __readB, + __getProloguePC #ifdef UNW_DEBUG , printf diff --git a/src/crash-stack/crash-stack-libelf-helpers.c b/src/crash-stack/crash-stack-libelf-helpers.c index 7dab540..ab95350 100644 --- a/src/crash-stack/crash-stack-libelf-helpers.c +++ b/src/crash-stack/crash-stack-libelf-helpers.c @@ -1,9 +1,32 @@ +/* + * + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack-libelf-helpers.c + * @brief unwinding call stacks, functions for accessing libelf for other + * purposes than unwinding + */ #include "crash-stack.h" #include #include #include -bool crash_stack_libelf_read_value(Dwfl *dwfl, Elf *core, pid_t pid, +bool _crash_stack_libelf_read_value(Dwfl *dwfl, Elf *core, pid_t pid, Dwarf_Addr a, void *v, size_t size, Mappings *mappings) { @@ -70,7 +93,7 @@ bool crash_stack_libelf_read_value(Dwfl *dwfl, Elf *core, pid_t pid, return false; } -Dwarf_Addr crash_stack_libelf_get_prologue_pc(Dwfl *dwfl, Dwarf_Addr current_pc, Mappings *mappings) +Dwarf_Addr _crash_stack_libelf_get_prologue_pc(Dwfl *dwfl, Dwarf_Addr current_pc, Mappings *mappings) { Dwarf_Addr result = 0; Dwfl_Module *module = dwfl_addrmodule(dwfl, current_pc); diff --git a/src/crash-stack/crash-stack-libelf.c b/src/crash-stack/crash-stack-libelf.c index f346b95..ff165c1 100644 --- a/src/crash-stack/crash-stack-libelf.c +++ b/src/crash-stack/crash-stack-libelf.c @@ -1,19 +1,50 @@ +/* + * + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack-libelf.c + * @brief unwinding call stacks, functions specific for archs that use only libelf + */ #include "crash-stack.h" #include #include #include +/** + * @brief Convenience type for registers of different sizes + */ typedef union { - uint16_t reg16; - uint32_t reg32; - uint64_t reg64; + uint16_t reg16; ///< 16-bit register + uint32_t reg32; ///< 32-bit register + uint64_t reg64; ///< 64-bit register } Register; -static Register g_pc; -static Register g_sp; +static Register g_pc; ///< storage for program counter value +static Register g_sp; ///< storage for stack pointer value #if _ELFUTILS_PREREQ(0,158) -static int frame_callback(Dwfl_Frame *state, void *arg) +/** + * @brief Callback for modern elfutils; called on each found frame. + * + * @param state state of the calls tack traversal + * @param arg user data - pointer to callstack database + */ +static int __frame_callback(Dwfl_Frame *state, void *arg) { Callstack *callstack = (Callstack*)arg; Dwarf_Addr address; @@ -22,22 +53,42 @@ static int frame_callback(Dwfl_Frame *state, void *arg) return callstack->elems < MAX_CALLSTACK_LEN ? DWARF_CB_OK : DWARF_CB_ABORT; } -static int thread_callback(Dwfl_Thread *thread, void *thread_arg) +/** + * @brief Callback for modern elfutils; called on each found thread. + * + * @param thread thread handle + * @param thread_arg user data - pointer to callstack database + */ +static int __thread_callback(Dwfl_Thread *thread, void *thread_arg) { - dwfl_thread_getframes(thread, frame_callback, thread_arg); + dwfl_thread_getframes(thread, __frame_callback, thread_arg); return DWARF_CB_ABORT; } #endif +/** + * @brief common names for program counter/instruction pointer + */ static const char *pc_names[] = { "pc", "rip", "eip", "ip" }; +/** + * @brief common names for stack pointer + */ static const char *sp_names[] = { "sp", "rsp", "esp" }; -static bool is_in(const char *name, const char **names, int elems) +/** + * @brief Helper functions that checks if a name is present in array of names + * + * @param name name to look for + * @param names array of names + * @param elems number of elements in names + * @returns true if name is found in names, false otherwise + */ +static bool __is_in(const char *name, const char **names, int elems) { int nit; for (nit = 0; nit < elems; ++nit) { @@ -47,9 +98,12 @@ static bool is_in(const char *name, const char **names, int elems) return false; } -#define IS_IN(name,names) is_in((name), (names), sizeof(names)/sizeof(names[0])) +/** + * @brief Helper macro for looking for name in array of names + */ +#define IS_IN(name,names) __is_in((name), (names), sizeof(names)/sizeof(names[0])) -void *get_place_for_register_value(const char *regname, int regnum) +void *_get_place_for_register_value(const char *regname, int regnum) { if (IS_IN(regname, pc_names)) return &g_pc; else if (IS_IN(regname, sp_names)) return &g_sp; @@ -57,40 +111,51 @@ void *get_place_for_register_value(const char *regname, int regnum) return 0; } -void explore_stack_in_search_of_functions(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +/** + * @brief Tries to heuristically gather call stack information. + * + * @remarks This function walks through the stack of the given process, and checks + * if found addresses are addresses belonging to functions. If so, it treats + * such address as an element of the call stack. + * While it gathers some useful information, it gathers also "false positives". + * @remarks It should be used as a last resort - when no other method is available. + * + * @param dwfl dwfl handle + * @param core core file handle, NULL if live process is analyzed + * @param pid PID of the analyzed process, 0 if core dump file is analyzed + * @param mappings module mappings database + * @param callstack call stack database + */ +static void _explore_stack_in_search_of_functions(Dwfl *dwfl, Elf *core, pid_t pid, + Mappings *mappings, Callstack *callstack) { Dwarf_Addr stack_pointer = sizeof(uintptr_t) == 4 ? g_sp.reg32 : g_sp.reg64; Dwarf_Addr stack_max_lookup = stack_pointer + 8*1024*1024; bool data_remaining = true; do { uintptr_t value; - data_remaining = crash_stack_libelf_read_value(dwfl, core, pid, stack_pointer, &value, sizeof(value), mappings); - if (data_remaining) - { + data_remaining = _crash_stack_libelf_read_value(dwfl, core, pid, stack_pointer, + &value, sizeof(value), mappings); + if (data_remaining) { Dwarf_Addr bias; /* check presence of address in text sections */ Dwfl_Module *module = dwfl_addrmodule(dwfl, value); - if (module != NULL) - { + if (module != NULL) { Dwarf_Addr elfval = value; GElf_Sym sym; GElf_Word shndxp = -1; dwfl_module_addrsym(module, value, &sym, &shndxp); Elf_Scn *scn = dwfl_module_address_section(module, &elfval, &bias); - if (scn != 0 || shndxp != -1) - { + if (scn != 0 || shndxp != -1) { callstack->tab[callstack->elems++] = value; if (callstack->elems >= MAX_CALLSTACK_LEN) return; } - else - { + else { /* check also inside [pie] and [exe] */ int i; - for (i = 0; i < mappings->elems; i++) - { - if (mappings->tab[i].m_start <= elfval && elfval < mappings->tab[i].m_end) - { + for (i = 0; i < mappings->elems; i++) { + if (mappings->tab[i].m_start <= elfval && elfval < mappings->tab[i].m_end) { callstack->tab[callstack->elems++] = value; break; } @@ -99,17 +164,17 @@ void explore_stack_in_search_of_functions(Dwfl *dwfl, Elf *core, pid_t pid, Mapp } } stack_pointer += sizeof(uintptr_t); - } while (data_remaining && stack_pointer < stack_max_lookup ); + } while (data_remaining && stack_pointer < stack_max_lookup); } -void create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) +void _create_crash_stack(Dwfl *dwfl, Elf *core, pid_t pid, Mappings *mappings, Callstack *callstack) { callstack->elems = 0; #if _ELFUTILS_PREREQ(0,158) - dwfl_getthreads(dwfl, thread_callback, callstack); + dwfl_getthreads(dwfl, __thread_callback, callstack); #else callstack->tab[callstack->elems++] = sizeof(uintptr_t) == 4 ? g_pc.reg32 : g_pc.reg64; - explore_stack_in_search_of_functions(dwfl, core, pid, mappings, callstack); + _explore_stack_in_search_of_functions(dwfl, core, pid, mappings, callstack); #endif } diff --git a/src/crash-stack/crash-stack-x86_64.c b/src/crash-stack/crash-stack-x86_64.c index 934ee72..174b2f4 100644 --- a/src/crash-stack/crash-stack-x86_64.c +++ b/src/crash-stack/crash-stack-x86_64.c @@ -1,20 +1,41 @@ +/* + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack-x86_64.c + * @brief unwinding call stacks, functions specific for x86_64 + */ #include "crash-stack.h" #include #include -struct user_regs_struct g_registers; +struct user_regs_struct g_registers; ///< static storage for ptrace buffer for registers -void *crash_stack_get_memory_for_ptrace_registers(size_t *size) +void *_crash_stack_get_memory_for_ptrace_registers(size_t *size) { if (NULL != size) *size = sizeof(g_registers); return &g_registers; } -void crash_stack_set_ptrace_registers(void *regbuf) +void _crash_stack_set_ptrace_registers(void *regbuf) { - void *rsp = get_place_for_register_value("rsp", 0); - void *rip = get_place_for_register_value("rip", 0); + void *rsp = _get_place_for_register_value("rsp", 0); + void *rip = _get_place_for_register_value("rip", 0); struct user_regs_struct *regs = regbuf; diff --git a/src/crash-stack/crash-stack.c b/src/crash-stack/crash-stack.c index 916f645..bed9cac 100644 --- a/src/crash-stack/crash-stack.c +++ b/src/crash-stack/crash-stack.c @@ -1,7 +1,35 @@ +/* + * Copyright (c) 2016 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Author: Adrian Szyndela + */ +/** + * @file crash-stack.c + * @brief This file contains Main module of call stack unwinding program + * + * Crash-stack is a single purpose program. Its duty is to show call stack + * of a crashed program. Crash-stack must be called with proper arguments: + * either core dump file name or PID of a crashed program. + */ #include #include #include #include +/* + * In case the program is compiled with core dumps, the license may switch to GPL2. + */ #ifdef WITH_CORE_DUMP #include #endif @@ -20,15 +48,21 @@ #include #include -static FILE *outputfile = NULL; -static FILE *errfile = NULL; +static FILE *outputfile = NULL; ///< global output stream +static FILE *errfile = NULL; ///< global error stream +/** + * @brief definitions for getopt options: identifiers + */ enum { OPT_PID, OPT_OUTPUTFILE, OPT_ERRFILE }; +/** + * @brief definitions for getopt options: full specifications + */ const struct option opts[] = { { "pid", required_argument, 0, OPT_PID }, { "output", required_argument, 0, OPT_OUTPUTFILE }, @@ -36,10 +70,27 @@ const struct option opts[] = { { 0, 0, 0, 0 } }; +/* + * __cxa_demangle() is taken from libstdc++, however there is no header that we + * can take a declaration from. Importing through 'extern' allows using it. + */ +/// @cond false extern char *__cxa_demangle(const char *mangled_name, char *output_buffer, size_t *length, int *status); - -static int module_callback(Dwfl_Module *module, void **userdata, +///@endcond + +/** + * @brief A callback for dwfl_getmodules(). + * + * This callback is called once for every module discovered by dwfl_getmodules(). + * + * @param module the dwfl module + * @param userdata unused, required by dwfl_getmodules() + * @param name name of the module + * @param address address of the module + * @param arg 4th argument to dwfl_getmodules is passed here + */ +static int __module_callback(Dwfl_Module *module, void **userdata, const char *name, Dwarf_Addr address, void *arg) { @@ -60,7 +111,15 @@ static int module_callback(Dwfl_Module *module, void **userdata, return DWARF_CB_OK; } -static void getvalue(Elf *core, const void *from, size_t size, void *to) +/** + * @brief Reads a value of specified size from core dump file. + * + * @param core ELF handler for the core dump file + * @param from the source address in the ELF file + * @param size size of the value in bits + * @param to the address of allocated memory, where the value will be copied + */ +static void __get_value(Elf *core, const void *from, size_t size, void *to) { Elf_Type type = ELF_T_BYTE; switch (size) { @@ -69,7 +128,7 @@ static void getvalue(Elf *core, const void *from, size_t size, void *to) case 32: type = ELF_T_WORD; break; case 64: type = ELF_T_XWORD; break; default: - fprintf(stderr, "getvalue for strange size: %llu\n", (unsigned long long)size); + fprintf(stderr, "__get_value for strange size: %llu\n", (unsigned long long)size); break; } Elf_Data out = { @@ -97,12 +156,25 @@ static void getvalue(Elf *core, const void *from, size_t size, void *to) fprintf(errfile, "failed to get value from core file\n"); } -static void parse_note_file(Elf *elf, const char *desc, uint64_t *values_cnt, uint64_t *page_size, +/** + * @brief gets number of values, page size, address size, values and names from ELF notes + * + * @remarks This is very specific for organization of notes part in ELF files + * + * @param elf ELF handler - may be core file + * @param desc address of ELF notes descriptor + * @param[out] values_cnt a place for number of values + * @param[out] page_size a place for page size + * @param[out] addr_size a place for address size + * @param[out] values a place for address of values + * @param[out] filenames a place for address of filenames + */ +static void __parse_note_file(Elf *elf, const char *desc, uint64_t *values_cnt, uint64_t *page_size, size_t *addr_size, const char **values, const char **filenames) { *addr_size = gelf_fsize(elf, ELF_T_ADDR, 1, EV_CURRENT); - getvalue(elf, desc, *addr_size*8, values_cnt); - getvalue(elf, desc + *addr_size, *addr_size*8, page_size); + __get_value(elf, desc, *addr_size*8, values_cnt); + __get_value(elf, desc + *addr_size, *addr_size*8, page_size); /* First: triplets of * count = values_cnt * Then the names of files. @@ -111,15 +183,40 @@ static void parse_note_file(Elf *elf, const char *desc, uint64_t *values_cnt, ui *filenames = *values + 3 * *addr_size * *values_cnt; } -static void get_mapping_item(Elf *elf, size_t addr_size, const void *item, +/** + * @brief Simple accessor for mapping items in ELF files + * + * @remarks This is very specific for organization of notes part in ELF files + * + * @param elf ELF handler - may be core file + * @param addr_size size of addresses in this ELF + * @param item address of mapping item to get data from + * @param[out] mapping_start value of the start of the mapping + * @param[out] mapping_end value of the end of the mapping + * @param[out] offset_in_pages number of pages of offset in the file + */ +static void __get_mapping_item(Elf *elf, size_t addr_size, const void *item, uint64_t *mapping_start, uint64_t *mapping_end, uint64_t *offset_in_pages) { - getvalue(elf, item, addr_size*8, mapping_start); - getvalue(elf, item + addr_size, addr_size*8, mapping_end); - getvalue(elf, item + 2 * addr_size, addr_size*8, offset_in_pages); + __get_value(elf, item, addr_size*8, mapping_start); + __get_value(elf, item + addr_size, addr_size*8, mapping_end); + __get_value(elf, item + 2 * addr_size, addr_size*8, offset_in_pages); } -static char *try_symbol_from_elfs(Elf *core, Elf_Data *notes, uintptr_t address, +/** + * @brief Tries to get symbol name from ELF files + * + * @remarks This function is used in case that symbol name is not available by libelf, + * e.g. when old libelf version does not take into account some modules. + * + * @param core ELF handler for the core dump file + * @param notes notes descriptor from core file + * @param address address to get symbol name for + * @param[out] module_name name of the module of the found symbol. Not touched when + * symbol is not found + * @return name of the symbol or NULL if not found + */ +static char *__try_symbol_from_elfs(Elf *core, Elf_Data *notes, uintptr_t address, const char **module_name) { GElf_Nhdr nhdr; @@ -136,14 +233,16 @@ static char *try_symbol_from_elfs(Elf *core, Elf_Data *notes, uintptr_t address, const char *filenames; size_t addr_size = 0; - parse_note_file(core, notes->d_buf + desc_pos, &values_cnt, &page_size, &addr_size, &values, &filenames); + __parse_note_file(core, notes->d_buf + desc_pos, &values_cnt, + &page_size, &addr_size, &values, &filenames); int ii; for (ii = 0; ii < values_cnt; ii++) { uint64_t mapping_start = 0, mapping_end = 0, offset_in_pages = 0; const char *item = values + 3 * addr_size * ii; - get_mapping_item(core, addr_size, item, &mapping_start, &mapping_end, &offset_in_pages); + __get_mapping_item(core, addr_size, item, &mapping_start, &mapping_end, + &offset_in_pages); if (mapping_start <= address && address < mapping_end) { Elf *elf; @@ -202,7 +301,13 @@ static char *try_symbol_from_elfs(Elf *core, Elf_Data *notes, uintptr_t address, return NULL; } -static Dwfl *open_dwfl_with_pid(pid_t pid) +/** + * @brief Opens libdwfl for using with live process + * + * @param pid pid of the process to attach to + * @return Dwfl handle + */ +static Dwfl *__open_dwfl_with_pid(pid_t pid) { int status; pid_t stopped_pid; @@ -249,11 +354,18 @@ static Dwfl *open_dwfl_with_pid(pid_t pid) return dwfl; } -/* - * This function will open core file regardless of WITH_CORE_DUMP setting. - * It may help with detecting issues with using dwfl even without support for dumps. +/** + * @brief Opens libdwfl for using with core dump file + * + * @remarks This function will open core file regardless of WITH_CORE_DUMP setting. + * It may help with detecting issues with using dwfl even without support + * for dumps. + * + * @param core elf handler for the core dump file + * @param core_file_name name of the core file; needed only for diagnostics + * @return Dwfl handle */ -static Dwfl *open_dwfl_with_core(Elf *core, const char *core_file_name) +static Dwfl *__open_dwfl_with_core(Elf *core, const char *core_file_name) { static const Dwfl_Callbacks core_callbacks = { .find_elf = dwfl_build_id_find_elf, @@ -289,23 +401,43 @@ static Dwfl *open_dwfl_with_core(Elf *core, const char *core_file_name) return dwfl; } -static int get_registers_ptrace(pid_t pid) +/** + * @brief Gets registers information for live process + * + * @param pid pid of the live process + * @return 0 on success, -1 otherwise + */ +static int __get_registers_ptrace(pid_t pid) { struct iovec data; - data.iov_base = crash_stack_get_memory_for_ptrace_registers( &data.iov_len ); + data.iov_base = _crash_stack_get_memory_for_ptrace_registers(&data.iov_len); if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &data) != 0) { fprintf(errfile, "PTRACE_GETREGSET failed on PID %d: %m\n", pid); return -1; } - crash_stack_set_ptrace_registers(data.iov_base); + _crash_stack_set_ptrace_registers(data.iov_base); return 0; } #ifdef WITH_CORE_DUMP -static void updateMapping(Mappings *mappings, uint64_t mapping_start, uint64_t mapping_end, +/** + * @brief Helper function for updating mappings. + * + * @remarks Old versions of libelf not always extract full information about modules. + * For such cases we maintain mappings for every module. Those mappings + * may be updated while reading notes from core file. + * + * @param mappings mappings database + * @param mapping_start address of the mapped start of the module; module is identified + * by mapping_start + * @param mapping_end address of the end of the module; needed to compute module boundaries + * @param offset offset within core file - unused + * @param name file name of the module + */ +static void __updateMapping(Mappings *mappings, uint64_t mapping_start, uint64_t mapping_end, uint64_t offset, const char *name) { int i; @@ -322,9 +454,20 @@ static void updateMapping(Mappings *mappings, uint64_t mapping_start, uint64_t m } #endif -static Elf_Data *get_registers_core(Elf *core, const char *core_file_name, Mappings *mappings) +/** + * @brief Gets registers from core dump + * + * @param core ELF handler for the core dump file + * @param core_file_name name of the core file; needed only for diagnostics + * @param mappings mappings database + * @return notes handler, NULL on error + */ +static Elf_Data *__get_registers_core(Elf *core, const char *core_file_name, Mappings *mappings) { Elf_Data *notes = NULL; + /* The part below uses libebl. In case WITH_CORE_DUMP is enabled, the license + * may switch to GPL2. + */ #ifdef WITH_CORE_DUMP GElf_Phdr mem; GElf_Phdr *phdr = gelf_getphdr(core, 0, &mem); @@ -394,10 +537,10 @@ static Elf_Data *get_registers_core(Elf *core, const char *core_file_name, Mappi fprintf(errfile, "%s : can't get register info\n", core_file_name); return NULL; } - void *place_for_reg_value = get_place_for_register_value(regname, regnum); + void *place_for_reg_value = _get_place_for_register_value(regname, regnum); if (place_for_reg_value != NULL) - getvalue(core, register_location, bits, place_for_reg_value); + __get_value(core, register_location, bits, place_for_reg_value); register_location += bits / 8 + reglocs[i].pad; } @@ -408,7 +551,7 @@ static Elf_Data *get_registers_core(Elf *core, const char *core_file_name, Mappi const char *filenames; size_t addr_size = 0; - parse_note_file(core, notes->d_buf + desc_pos, &values_cnt, &page_size, + __parse_note_file(core, notes->d_buf + desc_pos, &values_cnt, &page_size, &addr_size, &values, &filenames); int ii; @@ -420,9 +563,9 @@ static Elf_Data *get_registers_core(Elf *core, const char *core_file_name, Mappi uint64_t mapping_start = 0, mapping_end = 0, offset_in_pages = 0; const char *item = values + 3 * addr_size * ii; - get_mapping_item(core, addr_size, item, &mapping_start, &mapping_end, + __get_mapping_item(core, addr_size, item, &mapping_start, &mapping_end, &offset_in_pages); - updateMapping(mappings, mapping_start, mapping_end, + __updateMapping(mappings, mapping_start, mapping_end, offset_in_pages*page_size, filenames); filenames += strlen(filenames)+1; } @@ -436,7 +579,16 @@ static Elf_Data *get_registers_core(Elf *core, const char *core_file_name, Mappi return notes; } -static void printCallstack(Callstack *callstack, Dwfl *dwfl, Elf *core, pid_t pid, +/** + * @brief Prints call stack to the screen. + * + * @param callstack gathered call stack database + * @param dwfl dwfl handler + * @param core ELF handler for the core dump file, NULL if live process analyzed + * @param pid PID of the live process, 0 if core dump file analyzed + * @param notes notes handler, NULL if live process analyzed + */ +static void __print_callstack(Callstack *callstack, Dwfl *dwfl, Elf *core, pid_t pid, Elf_Data *notes) { fprintf(outputfile, "Call stack"); @@ -458,7 +610,7 @@ static void printCallstack(Callstack *callstack, Dwfl *dwfl, Elf *core, pid_t pi const char *module_name = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, &fname, NULL); char *symbol_from_elf = 0; if (symbol == NULL) - symbol = symbol_from_elf = try_symbol_from_elfs(core, notes, callstack->tab[it], &fname); + symbol = symbol_from_elf = __try_symbol_from_elfs(core, notes, callstack->tab[it], &fname); if (symbol != 0 && symbol[0] == '_' && symbol[1] == 'Z') { int status = -1; @@ -484,6 +636,18 @@ static void printCallstack(Callstack *callstack, Dwfl *dwfl, Elf *core, pid_t pi } } +/** + * @brief Main function. + * + * Main module accepts two forms of launching: + * + * crash-stack core-dump-file + * crash-stack --pid pid + * + * The first form allows user to print call stack of a generated core dump file. + * The second form allows connecting to a live process and displaying its call stack. + * It might be also used for connecting to a process from system's core dump handler. + */ int main(int argc, char **argv) { int c; @@ -521,7 +685,7 @@ int main(int argc, char **argv) Dwfl *dwfl = NULL; if (pid > 1) - dwfl = open_dwfl_with_pid(pid); + dwfl = __open_dwfl_with_pid(pid); else { if (argc != 1) { fprintf(errfile, @@ -542,7 +706,7 @@ int main(int argc, char **argv) return 3; } - dwfl = open_dwfl_with_core(core, core_file_name); + dwfl = __open_dwfl_with_core(core, core_file_name); } if (NULL == dwfl) @@ -551,15 +715,15 @@ int main(int argc, char **argv) Mappings mappings; mappings.elems = 0; - dwfl_getmodules(dwfl, module_callback, &mappings, 0); + dwfl_getmodules(dwfl, __module_callback, &mappings, 0); Elf_Data *notes = 0; /* Now, get registers */ if (pid > 1) { - if (-1 == get_registers_ptrace(pid)) + if (-1 == __get_registers_ptrace(pid)) return 3333; } else { - notes = get_registers_core(core, core_file_name, &mappings); + notes = __get_registers_core(core, core_file_name, &mappings); if (NULL == notes) return 2222; } @@ -567,10 +731,10 @@ int main(int argc, char **argv) /* Unwind call stack */ Callstack callstack; - create_crash_stack(dwfl, core, pid, &mappings, &callstack); + _create_crash_stack(dwfl, core, pid, &mappings, &callstack); /* Print the results */ - printCallstack(&callstack, dwfl, core, pid, notes); + __print_callstack(&callstack, dwfl, core, pid, notes); /* Clean up */ dwfl_report_end(dwfl, NULL, NULL); diff --git a/src/crash-stack/crash-stack.doxygen.in b/src/crash-stack/crash-stack.doxygen.in new file mode 100644 index 0000000..0d4c5bf --- /dev/null +++ b/src/crash-stack/crash-stack.doxygen.in @@ -0,0 +1,2384 @@ +# Doxyfile 1.8.9.1 + +# This file describes the settings to be used by the documentation system +# doxygen (www.doxygen.org) for a project. +# +# All text after a double hash (##) is considered a comment and is placed in +# front of the TAG it is preceding. +# +# All text after a single hash (#) is considered a comment and will be ignored. +# The format is: +# TAG = value [value, ...] +# For lists, items can also be appended using: +# TAG += value [value, ...] +# Values that contain spaces should be placed between quotes (\" \"). + +#--------------------------------------------------------------------------- +# Project related configuration options +#--------------------------------------------------------------------------- + +# This tag specifies the encoding used for all characters in the config file +# that follow. The default is UTF-8 which is also the encoding used for all text +# before the first occurrence of this tag. Doxygen uses libiconv (or the iconv +# built into libc) for the transcoding. See http://www.gnu.org/software/libiconv +# for the list of possible encodings. +# The default value is: UTF-8. + +DOXYFILE_ENCODING = UTF-8 + +# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by +# double-quotes, unless you are using Doxywizard) that should identify the +# project for which the documentation is generated. This name is used in the +# title of most generated pages and in a few other places. +# The default value is: My Project. + +PROJECT_NAME = "crash-stack" + +# The PROJECT_NUMBER tag can be used to enter a project or revision number. This +# could be handy for archiving the generated documentation or if some version +# control system is used. + +PROJECT_NUMBER = + +# Using the PROJECT_BRIEF tag one can provide an optional one line description +# for a project that appears at the top of each page and should give viewer a +# quick idea about the purpose of the project. Keep the description short. + +PROJECT_BRIEF = + +# With the PROJECT_LOGO tag one can specify a logo or an icon that is included +# in the documentation. The maximum height of the logo should not exceed 55 +# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy +# the logo to the output directory. + +PROJECT_LOGO = + +# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path +# into which the generated documentation will be written. If a relative path is +# entered, it will be relative to the location where doxygen was started. If +# left blank the current directory will be used. + +OUTPUT_DIRECTORY = + +# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub- +# directories (in 2 levels) under the output directory of each output format and +# will distribute the generated files over these directories. Enabling this +# option can be useful when feeding doxygen a huge amount of source files, where +# putting all generated files in the same directory would otherwise causes +# performance problems for the file system. +# The default value is: NO. + +CREATE_SUBDIRS = NO + +# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII +# characters to appear in the names of generated files. If set to NO, non-ASCII +# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode +# U+3044. +# The default value is: NO. + +ALLOW_UNICODE_NAMES = NO + +# The OUTPUT_LANGUAGE tag is used to specify the language in which all +# documentation generated by doxygen is written. Doxygen will use this +# information to generate all constant output in the proper language. +# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese, +# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States), +# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian, +# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages), +# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian, +# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian, +# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish, +# Ukrainian and Vietnamese. +# The default value is: English. + +OUTPUT_LANGUAGE = English + +# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member +# descriptions after the members that are listed in the file and class +# documentation (similar to Javadoc). Set to NO to disable this. +# The default value is: YES. + +BRIEF_MEMBER_DESC = YES + +# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief +# description of a member or function before the detailed description +# +# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the +# brief descriptions will be completely suppressed. +# The default value is: YES. + +REPEAT_BRIEF = YES + +# This tag implements a quasi-intelligent brief description abbreviator that is +# used to form the text in various listings. Each string in this list, if found +# as the leading text of the brief description, will be stripped from the text +# and the result, after processing the whole list, is used as the annotated +# text. Otherwise, the brief description is used as-is. If left blank, the +# following values are used ($name is automatically replaced with the name of +# the entity):The $name class, The $name widget, The $name file, is, provides, +# specifies, contains, represents, a, an and the. + +ABBREVIATE_BRIEF = + +# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then +# doxygen will generate a detailed section even if there is only a brief +# description. +# The default value is: NO. + +ALWAYS_DETAILED_SEC = NO + +# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all +# inherited members of a class in the documentation of that class as if those +# members were ordinary class members. Constructors, destructors and assignment +# operators of the base classes will not be shown. +# The default value is: NO. + +INLINE_INHERITED_MEMB = NO + +# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path +# before files name in the file list and in the header files. If set to NO the +# shortest path that makes the file name unique will be used +# The default value is: YES. + +FULL_PATH_NAMES = YES + +# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path. +# Stripping is only done if one of the specified strings matches the left-hand +# part of the path. The tag can be used to show relative paths in the file list. +# If left blank the directory from which doxygen is run is used as the path to +# strip. +# +# Note that you can specify absolute paths here, but also relative paths, which +# will be relative from the directory where doxygen is started. +# This tag requires that the tag FULL_PATH_NAMES is set to YES. + +STRIP_FROM_PATH = + +# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the +# path mentioned in the documentation of a class, which tells the reader which +# header file to include in order to use a class. If left blank only the name of +# the header file containing the class definition is used. Otherwise one should +# specify the list of include paths that are normally passed to the compiler +# using the -I flag. + +STRIP_FROM_INC_PATH = + +# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but +# less readable) file names. This can be useful is your file systems doesn't +# support long names like on DOS, Mac, or CD-ROM. +# The default value is: NO. + +SHORT_NAMES = NO + +# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the +# first line (until the first dot) of a Javadoc-style comment as the brief +# description. If set to NO, the Javadoc-style will behave just like regular Qt- +# style comments (thus requiring an explicit @brief command for a brief +# description.) +# The default value is: NO. + +JAVADOC_AUTOBRIEF = NO + +# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first +# line (until the first dot) of a Qt-style comment as the brief description. If +# set to NO, the Qt-style will behave just like regular Qt-style comments (thus +# requiring an explicit \brief command for a brief description.) +# The default value is: NO. + +QT_AUTOBRIEF = NO + +# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a +# multi-line C++ special comment block (i.e. a block of //! or /// comments) as +# a brief description. This used to be the default behavior. The new default is +# to treat a multi-line C++ comment block as a detailed description. Set this +# tag to YES if you prefer the old behavior instead. +# +# Note that setting this tag to YES also means that rational rose comments are +# not recognized any more. +# The default value is: NO. + +MULTILINE_CPP_IS_BRIEF = NO + +# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the +# documentation from any documented member that it re-implements. +# The default value is: YES. + +INHERIT_DOCS = YES + +# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new +# page for each member. If set to NO, the documentation of a member will be part +# of the file/class/namespace that contains it. +# The default value is: NO. + +SEPARATE_MEMBER_PAGES = NO + +# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen +# uses this value to replace tabs by spaces in code fragments. +# Minimum value: 1, maximum value: 16, default value: 4. + +TAB_SIZE = 4 + +# This tag can be used to specify a number of aliases that act as commands in +# the documentation. An alias has the form: +# name=value +# For example adding +# "sideeffect=@par Side Effects:\n" +# will allow you to put the command \sideeffect (or @sideeffect) in the +# documentation, which will result in a user-defined paragraph with heading +# "Side Effects:". You can put \n's in the value part of an alias to insert +# newlines. + +ALIASES = + +# This tag can be used to specify a number of word-keyword mappings (TCL only). +# A mapping has the form "name=value". For example adding "class=itcl::class" +# will allow you to use the command class in the itcl::class meaning. + +TCL_SUBST = + +# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources +# only. Doxygen will then generate output that is more tailored for C. For +# instance, some of the names that are used will be different. The list of all +# members will be omitted, etc. +# The default value is: NO. + +OPTIMIZE_OUTPUT_FOR_C = NO + +# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or +# Python sources only. Doxygen will then generate output that is more tailored +# for that language. For instance, namespaces will be presented as packages, +# qualified scopes will look different, etc. +# The default value is: NO. + +OPTIMIZE_OUTPUT_JAVA = NO + +# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran +# sources. Doxygen will then generate output that is tailored for Fortran. +# The default value is: NO. + +OPTIMIZE_FOR_FORTRAN = NO + +# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL +# sources. Doxygen will then generate output that is tailored for VHDL. +# The default value is: NO. + +OPTIMIZE_OUTPUT_VHDL = NO + +# Doxygen selects the parser to use depending on the extension of the files it +# parses. With this tag you can assign which parser to use for a given +# extension. Doxygen has a built-in mapping, but you can override or extend it +# using this tag. The format is ext=language, where ext is a file extension, and +# language is one of the parsers supported by doxygen: IDL, Java, Javascript, +# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran: +# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran: +# Fortran. In the later case the parser tries to guess whether the code is fixed +# or free formatted code, this is the default for Fortran type files), VHDL. For +# instance to make doxygen treat .inc files as Fortran files (default is PHP), +# and .f files as C (default is Fortran), use: inc=Fortran f=C. +# +# Note: For files without extension you can use no_extension as a placeholder. +# +# Note that for custom extensions you also need to set FILE_PATTERNS otherwise +# the files are not read by doxygen. + +EXTENSION_MAPPING = + +# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments +# according to the Markdown format, which allows for more readable +# documentation. See http://daringfireball.net/projects/markdown/ for details. +# The output of markdown processing is further processed by doxygen, so you can +# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in +# case of backward compatibilities issues. +# The default value is: YES. + +MARKDOWN_SUPPORT = YES + +# When enabled doxygen tries to link words that correspond to documented +# classes, or namespaces to their corresponding documentation. Such a link can +# be prevented in individual cases by putting a % sign in front of the word or +# globally by setting AUTOLINK_SUPPORT to NO. +# The default value is: YES. + +AUTOLINK_SUPPORT = YES + +# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want +# to include (a tag file for) the STL sources as input, then you should set this +# tag to YES in order to let doxygen match functions declarations and +# definitions whose arguments contain STL classes (e.g. func(std::string); +# versus func(std::string) {}). This also make the inheritance and collaboration +# diagrams that involve STL classes more complete and accurate. +# The default value is: NO. + +BUILTIN_STL_SUPPORT = NO + +# If you use Microsoft's C++/CLI language, you should set this option to YES to +# enable parsing support. +# The default value is: NO. + +CPP_CLI_SUPPORT = NO + +# Set the SIP_SUPPORT tag to YES if your project consists of sip (see: +# http://www.riverbankcomputing.co.uk/software/sip/intro) sources only. Doxygen +# will parse them like normal C++ but will assume all classes use public instead +# of private inheritance when no explicit protection keyword is present. +# The default value is: NO. + +SIP_SUPPORT = NO + +# For Microsoft's IDL there are propget and propput attributes to indicate +# getter and setter methods for a property. Setting this option to YES will make +# doxygen to replace the get and set methods by a property in the documentation. +# This will only work if the methods are indeed getting or setting a simple +# type. If this is not the case, or you want to show the methods anyway, you +# should set this option to NO. +# The default value is: YES. + +IDL_PROPERTY_SUPPORT = YES + +# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC +# tag is set to YES then doxygen will reuse the documentation of the first +# member in the group (if any) for the other members of the group. By default +# all members of a group must be documented explicitly. +# The default value is: NO. + +DISTRIBUTE_GROUP_DOC = NO + +# Set the SUBGROUPING tag to YES to allow class member groups of the same type +# (for instance a group of public functions) to be put as a subgroup of that +# type (e.g. under the Public Functions section). Set it to NO to prevent +# subgrouping. Alternatively, this can be done per class using the +# \nosubgrouping command. +# The default value is: YES. + +SUBGROUPING = YES + +# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions +# are shown inside the group in which they are included (e.g. using \ingroup) +# instead of on a separate page (for HTML and Man pages) or section (for LaTeX +# and RTF). +# +# Note that this feature does not work in combination with +# SEPARATE_MEMBER_PAGES. +# The default value is: NO. + +INLINE_GROUPED_CLASSES = NO + +# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions +# with only public data fields or simple typedef fields will be shown inline in +# the documentation of the scope in which they are defined (i.e. file, +# namespace, or group documentation), provided this scope is documented. If set +# to NO, structs, classes, and unions are shown on a separate page (for HTML and +# Man pages) or section (for LaTeX and RTF). +# The default value is: NO. + +INLINE_SIMPLE_STRUCTS = NO + +# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or +# enum is documented as struct, union, or enum with the name of the typedef. So +# typedef struct TypeS {} TypeT, will appear in the documentation as a struct +# with name TypeT. When disabled the typedef will appear as a member of a file, +# namespace, or class. And the struct will be named TypeS. This can typically be +# useful for C code in case the coding convention dictates that all compound +# types are typedef'ed and only the typedef is referenced, never the tag name. +# The default value is: NO. + +TYPEDEF_HIDES_STRUCT = NO + +# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This +# cache is used to resolve symbols given their name and scope. Since this can be +# an expensive process and often the same symbol appears multiple times in the +# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small +# doxygen will become slower. If the cache is too large, memory is wasted. The +# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range +# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536 +# symbols. At the end of a run doxygen will report the cache usage and suggest +# the optimal cache size from a speed point of view. +# Minimum value: 0, maximum value: 9, default value: 0. + +LOOKUP_CACHE_SIZE = 0 + +#--------------------------------------------------------------------------- +# Build related configuration options +#--------------------------------------------------------------------------- + +# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in +# documentation are documented, even if no documentation was available. Private +# class members and static file members will be hidden unless the +# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES. +# Note: This will also disable the warnings about undocumented members that are +# normally produced when WARNINGS is set to YES. +# The default value is: NO. + +EXTRACT_ALL = NO + +# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will +# be included in the documentation. +# The default value is: NO. + +EXTRACT_PRIVATE = YES + +# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal +# scope will be included in the documentation. +# The default value is: NO. + +EXTRACT_PACKAGE = YES + +# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be +# included in the documentation. +# The default value is: NO. + +EXTRACT_STATIC = YES + +# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined +# locally in source files will be included in the documentation. If set to NO, +# only classes defined in header files are included. Does not have any effect +# for Java sources. +# The default value is: YES. + +EXTRACT_LOCAL_CLASSES = YES + +# This flag is only useful for Objective-C code. If set to YES, local methods, +# which are defined in the implementation section but not in the interface are +# included in the documentation. If set to NO, only methods in the interface are +# included. +# The default value is: NO. + +EXTRACT_LOCAL_METHODS = NO + +# If this flag is set to YES, the members of anonymous namespaces will be +# extracted and appear in the documentation as a namespace called +# 'anonymous_namespace{file}', where file will be replaced with the base name of +# the file that contains the anonymous namespace. By default anonymous namespace +# are hidden. +# The default value is: NO. + +EXTRACT_ANON_NSPACES = NO + +# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all +# undocumented members inside documented classes or files. If set to NO these +# members will be included in the various overviews, but no documentation +# section is generated. This option has no effect if EXTRACT_ALL is enabled. +# The default value is: NO. + +HIDE_UNDOC_MEMBERS = NO + +# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all +# undocumented classes that are normally visible in the class hierarchy. If set +# to NO, these classes will be included in the various overviews. This option +# has no effect if EXTRACT_ALL is enabled. +# The default value is: NO. + +HIDE_UNDOC_CLASSES = NO + +# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend +# (class|struct|union) declarations. If set to NO, these declarations will be +# included in the documentation. +# The default value is: NO. + +HIDE_FRIEND_COMPOUNDS = NO + +# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any +# documentation blocks found inside the body of a function. If set to NO, these +# blocks will be appended to the function's detailed documentation block. +# The default value is: NO. + +HIDE_IN_BODY_DOCS = NO + +# The INTERNAL_DOCS tag determines if documentation that is typed after a +# \internal command is included. If the tag is set to NO then the documentation +# will be excluded. Set it to YES to include the internal documentation. +# The default value is: NO. + +INTERNAL_DOCS = YES + +# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file +# names in lower-case letters. If set to YES, upper-case letters are also +# allowed. This is useful if you have classes or files whose names only differ +# in case and if your file system supports case sensitive file names. Windows +# and Mac users are advised to set this option to NO. +# The default value is: system dependent. + +CASE_SENSE_NAMES = YES + +# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with +# their full class and namespace scopes in the documentation. If set to YES, the +# scope will be hidden. +# The default value is: NO. + +HIDE_SCOPE_NAMES = NO + +# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will +# append additional text to a page's title, such as Class Reference. If set to +# YES the compound reference will be hidden. +# The default value is: NO. + +HIDE_COMPOUND_REFERENCE= NO + +# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of +# the files that are included by a file in the documentation of that file. +# The default value is: YES. + +SHOW_INCLUDE_FILES = NO + +# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each +# grouped member an include statement to the documentation, telling the reader +# which file to include in order to use the member. +# The default value is: NO. + +SHOW_GROUPED_MEMB_INC = NO + +# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include +# files with double quotes in the documentation rather than with sharp brackets. +# The default value is: NO. + +FORCE_LOCAL_INCLUDES = NO + +# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the +# documentation for inline members. +# The default value is: YES. + +INLINE_INFO = YES + +# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the +# (detailed) documentation of file and class members alphabetically by member +# name. If set to NO, the members will appear in declaration order. +# The default value is: YES. + +SORT_MEMBER_DOCS = YES + +# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief +# descriptions of file, namespace and class members alphabetically by member +# name. If set to NO, the members will appear in declaration order. Note that +# this will also influence the order of the classes in the class list. +# The default value is: NO. + +SORT_BRIEF_DOCS = NO + +# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the +# (brief and detailed) documentation of class members so that constructors and +# destructors are listed first. If set to NO the constructors will appear in the +# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS. +# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief +# member documentation. +# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting +# detailed member documentation. +# The default value is: NO. + +SORT_MEMBERS_CTORS_1ST = NO + +# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy +# of group names into alphabetical order. If set to NO the group names will +# appear in their defined order. +# The default value is: NO. + +SORT_GROUP_NAMES = NO + +# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by +# fully-qualified names, including namespaces. If set to NO, the class list will +# be sorted only by class name, not including the namespace part. +# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES. +# Note: This option applies only to the class list, not to the alphabetical +# list. +# The default value is: NO. + +SORT_BY_SCOPE_NAME = NO + +# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper +# type resolution of all parameters of a function it will reject a match between +# the prototype and the implementation of a member function even if there is +# only one candidate or it is obvious which candidate to choose by doing a +# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still +# accept a match between prototype and implementation in such cases. +# The default value is: NO. + +STRICT_PROTO_MATCHING = NO + +# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo +# list. This list is created by putting \todo commands in the documentation. +# The default value is: YES. + +GENERATE_TODOLIST = YES + +# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test +# list. This list is created by putting \test commands in the documentation. +# The default value is: YES. + +GENERATE_TESTLIST = YES + +# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug +# list. This list is created by putting \bug commands in the documentation. +# The default value is: YES. + +GENERATE_BUGLIST = YES + +# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO) +# the deprecated list. This list is created by putting \deprecated commands in +# the documentation. +# The default value is: YES. + +GENERATE_DEPRECATEDLIST= YES + +# The ENABLED_SECTIONS tag can be used to enable conditional documentation +# sections, marked by \if ... \endif and \cond +# ... \endcond blocks. + +ENABLED_SECTIONS = + +# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the +# initial value of a variable or macro / define can have for it to appear in the +# documentation. If the initializer consists of more lines than specified here +# it will be hidden. Use a value of 0 to hide initializers completely. The +# appearance of the value of individual variables and macros / defines can be +# controlled using \showinitializer or \hideinitializer command in the +# documentation regardless of this setting. +# Minimum value: 0, maximum value: 10000, default value: 30. + +MAX_INITIALIZER_LINES = 30 + +# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at +# the bottom of the documentation of classes and structs. If set to YES, the +# list will mention the files that were used to generate the documentation. +# The default value is: YES. + +SHOW_USED_FILES = YES + +# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This +# will remove the Files entry from the Quick Index and from the Folder Tree View +# (if specified). +# The default value is: YES. + +SHOW_FILES = YES + +# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces +# page. This will remove the Namespaces entry from the Quick Index and from the +# Folder Tree View (if specified). +# The default value is: YES. + +SHOW_NAMESPACES = YES + +# The FILE_VERSION_FILTER tag can be used to specify a program or script that +# doxygen should invoke to get the current version for each file (typically from +# the version control system). Doxygen will invoke the program by executing (via +# popen()) the command command input-file, where command is the value of the +# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided +# by doxygen. Whatever the program writes to standard output is used as the file +# version. For an example see the documentation. + +FILE_VERSION_FILTER = + +# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed +# by doxygen. The layout file controls the global structure of the generated +# output files in an output format independent way. To create the layout file +# that represents doxygen's defaults, run doxygen with the -l option. You can +# optionally specify a file name after the option, if omitted DoxygenLayout.xml +# will be used as the name of the layout file. +# +# Note that if you run doxygen from a directory containing a file called +# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE +# tag is left empty. + +LAYOUT_FILE = + +# The CITE_BIB_FILES tag can be used to specify one or more bib files containing +# the reference definitions. This must be a list of .bib files. The .bib +# extension is automatically appended if omitted. This requires the bibtex tool +# to be installed. See also http://en.wikipedia.org/wiki/BibTeX for more info. +# For LaTeX the style of the bibliography can be controlled using +# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the +# search path. See also \cite for info how to create references. + +CITE_BIB_FILES = + +#--------------------------------------------------------------------------- +# Configuration options related to warning and progress messages +#--------------------------------------------------------------------------- + +# The QUIET tag can be used to turn on/off the messages that are generated to +# standard output by doxygen. If QUIET is set to YES this implies that the +# messages are off. +# The default value is: NO. + +QUIET = NO + +# The WARNINGS tag can be used to turn on/off the warning messages that are +# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES +# this implies that the warnings are on. +# +# Tip: Turn warnings on while writing the documentation. +# The default value is: YES. + +WARNINGS = YES + +# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate +# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag +# will automatically be disabled. +# The default value is: YES. + +WARN_IF_UNDOCUMENTED = YES + +# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for +# potential errors in the documentation, such as not documenting some parameters +# in a documented function, or documenting parameters that don't exist or using +# markup commands wrongly. +# The default value is: YES. + +WARN_IF_DOC_ERROR = YES + +# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that +# are documented, but have no documentation for their parameters or return +# value. If set to NO, doxygen will only warn about wrong or incomplete +# parameter documentation, but not about the absence of documentation. +# The default value is: NO. + +WARN_NO_PARAMDOC = NO + +# The WARN_FORMAT tag determines the format of the warning messages that doxygen +# can produce. The string should contain the $file, $line, and $text tags, which +# will be replaced by the file and line number from which the warning originated +# and the warning text. Optionally the format may contain $version, which will +# be replaced by the version of the file (if it could be obtained via +# FILE_VERSION_FILTER) +# The default value is: $file:$line: $text. + +WARN_FORMAT = "$file:$line: $text" + +# The WARN_LOGFILE tag can be used to specify a file to which warning and error +# messages should be written. If left blank the output is written to standard +# error (stderr). + +WARN_LOGFILE = + +#--------------------------------------------------------------------------- +# Configuration options related to the input files +#--------------------------------------------------------------------------- + +# The INPUT tag is used to specify the files and/or directories that contain +# documented source files. You may enter file names like myfile.cpp or +# directories like /usr/src/myproject. Separate the files or directories with +# spaces. +# Note: If this tag is empty the current directory is searched. + +INPUT = + +# This tag can be used to specify the character encoding of the source files +# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses +# libiconv (or the iconv built into libc) for the transcoding. See the libiconv +# documentation (see: http://www.gnu.org/software/libiconv) for the list of +# possible encodings. +# The default value is: UTF-8. + +INPUT_ENCODING = UTF-8 + +# If the value of the INPUT tag contains directories, you can use the +# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and +# *.h) to filter out the source-files in the directories. If left blank the +# following patterns are tested:*.c, *.cc, *.cxx, *.cpp, *.c++, *.java, *.ii, +# *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h, *.hh, *.hxx, *.hpp, +# *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc, *.m, *.markdown, +# *.md, *.mm, *.dox, *.py, *.f90, *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf, +# *.qsf, *.as and *.js. + +FILE_PATTERNS = + +# The RECURSIVE tag can be used to specify whether or not subdirectories should +# be searched for input files as well. +# The default value is: NO. + +RECURSIVE = NO + +# The EXCLUDE tag can be used to specify files and/or directories that should be +# excluded from the INPUT source files. This way you can easily exclude a +# subdirectory from a directory tree whose root is specified with the INPUT tag. +# +# Note that relative paths are relative to the directory from which doxygen is +# run. + +EXCLUDE = + +# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or +# directories that are symbolic links (a Unix file system feature) are excluded +# from the input. +# The default value is: NO. + +EXCLUDE_SYMLINKS = NO + +# If the value of the INPUT tag contains directories, you can use the +# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude +# certain files from those directories. +# +# Note that the wildcards are matched against the file with absolute path, so to +# exclude all test directories for example use the pattern */test/* + +EXCLUDE_PATTERNS = + +# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names +# (namespaces, classes, functions, etc.) that should be excluded from the +# output. The symbol name can be a fully qualified name, a word, or if the +# wildcard * is used, a substring. Examples: ANamespace, AClass, +# AClass::ANamespace, ANamespace::*Test +# +# Note that the wildcards are matched against the file with absolute path, so to +# exclude all test directories use the pattern */test/* + +EXCLUDE_SYMBOLS = + +# The EXAMPLE_PATH tag can be used to specify one or more files or directories +# that contain example code fragments that are included (see the \include +# command). + +EXAMPLE_PATH = + +# If the value of the EXAMPLE_PATH tag contains directories, you can use the +# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and +# *.h) to filter out the source-files in the directories. If left blank all +# files are included. + +EXAMPLE_PATTERNS = + +# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be +# searched for input files to be used with the \include or \dontinclude commands +# irrespective of the value of the RECURSIVE tag. +# The default value is: NO. + +EXAMPLE_RECURSIVE = NO + +# The IMAGE_PATH tag can be used to specify one or more files or directories +# that contain images that are to be included in the documentation (see the +# \image command). + +IMAGE_PATH = + +# The INPUT_FILTER tag can be used to specify a program that doxygen should +# invoke to filter for each input file. Doxygen will invoke the filter program +# by executing (via popen()) the command: +# +# +# +# where is the value of the INPUT_FILTER tag, and is the +# name of an input file. Doxygen will then use the output that the filter +# program writes to standard output. If FILTER_PATTERNS is specified, this tag +# will be ignored. +# +# Note that the filter must not add or remove lines; it is applied before the +# code is scanned, but not when the output code is generated. If lines are added +# or removed, the anchors will not be placed correctly. + +INPUT_FILTER = + +# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern +# basis. Doxygen will compare the file name with each pattern and apply the +# filter if there is a match. The filters are a list of the form: pattern=filter +# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how +# filters are used. If the FILTER_PATTERNS tag is empty or if none of the +# patterns match the file name, INPUT_FILTER is applied. + +FILTER_PATTERNS = + +# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using +# INPUT_FILTER) will also be used to filter the input files that are used for +# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES). +# The default value is: NO. + +FILTER_SOURCE_FILES = NO + +# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file +# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and +# it is also possible to disable source filtering for a specific pattern using +# *.ext= (so without naming a filter). +# This tag requires that the tag FILTER_SOURCE_FILES is set to YES. + +FILTER_SOURCE_PATTERNS = + +# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that +# is part of the input, its contents will be placed on the main page +# (index.html). This can be useful if you have a project on for instance GitHub +# and want to reuse the introduction page also for the doxygen output. + +USE_MDFILE_AS_MAINPAGE = + +#--------------------------------------------------------------------------- +# Configuration options related to source browsing +#--------------------------------------------------------------------------- + +# If the SOURCE_BROWSER tag is set to YES then a list of source files will be +# generated. Documented entities will be cross-referenced with these sources. +# +# Note: To get rid of all source code in the generated output, make sure that +# also VERBATIM_HEADERS is set to NO. +# The default value is: NO. + +SOURCE_BROWSER = NO + +# Setting the INLINE_SOURCES tag to YES will include the body of functions, +# classes and enums directly into the documentation. +# The default value is: NO. + +INLINE_SOURCES = NO + +# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any +# special comment blocks from generated source code fragments. Normal C, C++ and +# Fortran comments will always remain visible. +# The default value is: YES. + +STRIP_CODE_COMMENTS = YES + +# If the REFERENCED_BY_RELATION tag is set to YES then for each documented +# function all documented functions referencing it will be listed. +# The default value is: NO. + +REFERENCED_BY_RELATION = NO + +# If the REFERENCES_RELATION tag is set to YES then for each documented function +# all documented entities called/used by that function will be listed. +# The default value is: NO. + +REFERENCES_RELATION = NO + +# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set +# to YES then the hyperlinks from functions in REFERENCES_RELATION and +# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will +# link to the documentation. +# The default value is: YES. + +REFERENCES_LINK_SOURCE = YES + +# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the +# source code will show a tooltip with additional information such as prototype, +# brief description and links to the definition and documentation. Since this +# will make the HTML file larger and loading of large files a bit slower, you +# can opt to disable this feature. +# The default value is: YES. +# This tag requires that the tag SOURCE_BROWSER is set to YES. + +SOURCE_TOOLTIPS = YES + +# If the USE_HTAGS tag is set to YES then the references to source code will +# point to the HTML generated by the htags(1) tool instead of doxygen built-in +# source browser. The htags tool is part of GNU's global source tagging system +# (see http://www.gnu.org/software/global/global.html). You will need version +# 4.8.6 or higher. +# +# To use it do the following: +# - Install the latest version of global +# - Enable SOURCE_BROWSER and USE_HTAGS in the config file +# - Make sure the INPUT points to the root of the source tree +# - Run doxygen as normal +# +# Doxygen will invoke htags (and that will in turn invoke gtags), so these +# tools must be available from the command line (i.e. in the search path). +# +# The result: instead of the source browser generated by doxygen, the links to +# source code will now point to the output of htags. +# The default value is: NO. +# This tag requires that the tag SOURCE_BROWSER is set to YES. + +USE_HTAGS = NO + +# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a +# verbatim copy of the header file for each class for which an include is +# specified. Set to NO to disable this. +# See also: Section \class. +# The default value is: YES. + +VERBATIM_HEADERS = YES + +# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the +# clang parser (see: http://clang.llvm.org/) for more accurate parsing at the +# cost of reduced performance. This can be particularly helpful with template +# rich C++ code for which doxygen's built-in parser lacks the necessary type +# information. +# Note: The availability of this option depends on whether or not doxygen was +# compiled with the --with-libclang option. +# The default value is: NO. + +CLANG_ASSISTED_PARSING = NO + +# If clang assisted parsing is enabled you can provide the compiler with command +# line options that you would normally use when invoking the compiler. Note that +# the include paths will already be set by doxygen for the files and directories +# specified with INPUT and INCLUDE_PATH. +# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES. + +CLANG_OPTIONS = + +#--------------------------------------------------------------------------- +# Configuration options related to the alphabetical class index +#--------------------------------------------------------------------------- + +# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all +# compounds will be generated. Enable this if the project contains a lot of +# classes, structs, unions or interfaces. +# The default value is: YES. + +ALPHABETICAL_INDEX = YES + +# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in +# which the alphabetical index list will be split. +# Minimum value: 1, maximum value: 20, default value: 5. +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES. + +COLS_IN_ALPHA_INDEX = 5 + +# In case all classes in a project start with a common prefix, all classes will +# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag +# can be used to specify a prefix (or a list of prefixes) that should be ignored +# while generating the index headers. +# This tag requires that the tag ALPHABETICAL_INDEX is set to YES. + +IGNORE_PREFIX = + +#--------------------------------------------------------------------------- +# Configuration options related to the HTML output +#--------------------------------------------------------------------------- + +# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output +# The default value is: YES. + +GENERATE_HTML = YES + +# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a +# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of +# it. +# The default directory is: html. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_OUTPUT = html + +# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each +# generated HTML page (for example: .htm, .php, .asp). +# The default value is: .html. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_FILE_EXTENSION = .html + +# The HTML_HEADER tag can be used to specify a user-defined HTML header file for +# each generated HTML page. If the tag is left blank doxygen will generate a +# standard header. +# +# To get valid HTML the header file that includes any scripts and style sheets +# that doxygen needs, which is dependent on the configuration options used (e.g. +# the setting GENERATE_TREEVIEW). It is highly recommended to start with a +# default header using +# doxygen -w html new_header.html new_footer.html new_stylesheet.css +# YourConfigFile +# and then modify the file new_header.html. See also section "Doxygen usage" +# for information on how to generate the default header that doxygen normally +# uses. +# Note: The header is subject to change so you typically have to regenerate the +# default header when upgrading to a newer version of doxygen. For a description +# of the possible markers and block names see the documentation. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_HEADER = + +# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each +# generated HTML page. If the tag is left blank doxygen will generate a standard +# footer. See HTML_HEADER for more information on how to generate a default +# footer and what special commands can be used inside the footer. See also +# section "Doxygen usage" for information on how to generate the default footer +# that doxygen normally uses. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_FOOTER = + +# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style +# sheet that is used by each HTML page. It can be used to fine-tune the look of +# the HTML output. If left blank doxygen will generate a default style sheet. +# See also section "Doxygen usage" for information on how to generate the style +# sheet that doxygen normally uses. +# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as +# it is more robust and this tag (HTML_STYLESHEET) will in the future become +# obsolete. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_STYLESHEET = + +# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined +# cascading style sheets that are included after the standard style sheets +# created by doxygen. Using this option one can overrule certain style aspects. +# This is preferred over using HTML_STYLESHEET since it does not replace the +# standard style sheet and is therefore more robust against future updates. +# Doxygen will copy the style sheet files to the output directory. +# Note: The order of the extra style sheet files is of importance (e.g. the last +# style sheet in the list overrules the setting of the previous ones in the +# list). For an example see the documentation. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_EXTRA_STYLESHEET = + +# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or +# other source files which should be copied to the HTML output directory. Note +# that these files will be copied to the base HTML output directory. Use the +# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these +# files. In the HTML_STYLESHEET file, use the file name only. Also note that the +# files will be copied as-is; there are no commands or markers available. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_EXTRA_FILES = + +# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen +# will adjust the colors in the style sheet and background images according to +# this color. Hue is specified as an angle on a colorwheel, see +# http://en.wikipedia.org/wiki/Hue for more information. For instance the value +# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300 +# purple, and 360 is red again. +# Minimum value: 0, maximum value: 359, default value: 220. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_HUE = 220 + +# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors +# in the HTML output. For a value of 0 the output will use grayscales only. A +# value of 255 will produce the most vivid colors. +# Minimum value: 0, maximum value: 255, default value: 100. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_SAT = 100 + +# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the +# luminance component of the colors in the HTML output. Values below 100 +# gradually make the output lighter, whereas values above 100 make the output +# darker. The value divided by 100 is the actual gamma applied, so 80 represents +# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not +# change the gamma. +# Minimum value: 40, maximum value: 240, default value: 80. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_COLORSTYLE_GAMMA = 80 + +# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML +# page will contain the date and time when the page was generated. Setting this +# to YES can help to show when doxygen was last run and thus if the +# documentation is up to date. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_TIMESTAMP = NO + +# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML +# documentation will contain sections that can be hidden and shown after the +# page has loaded. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_DYNAMIC_SECTIONS = NO + +# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries +# shown in the various tree structured indices initially; the user can expand +# and collapse entries dynamically later on. Doxygen will expand the tree to +# such a level that at most the specified number of entries are visible (unless +# a fully collapsed tree already exceeds this amount). So setting the number of +# entries 1 will produce a full collapsed tree by default. 0 is a special value +# representing an infinite number of entries and will result in a full expanded +# tree by default. +# Minimum value: 0, maximum value: 9999, default value: 100. +# This tag requires that the tag GENERATE_HTML is set to YES. + +HTML_INDEX_NUM_ENTRIES = 100 + +# If the GENERATE_DOCSET tag is set to YES, additional index files will be +# generated that can be used as input for Apple's Xcode 3 integrated development +# environment (see: http://developer.apple.com/tools/xcode/), introduced with +# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a +# Makefile in the HTML output directory. Running make will produce the docset in +# that directory and running make install will install the docset in +# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at +# startup. See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html +# for more information. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_DOCSET = NO + +# This tag determines the name of the docset feed. A documentation feed provides +# an umbrella under which multiple documentation sets from a single provider +# (such as a company or product suite) can be grouped. +# The default value is: Doxygen generated docs. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_FEEDNAME = "Doxygen generated docs" + +# This tag specifies a string that should uniquely identify the documentation +# set bundle. This should be a reverse domain-name style string, e.g. +# com.mycompany.MyDocSet. Doxygen will append .docset to the name. +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_BUNDLE_ID = org.doxygen.Project + +# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify +# the documentation publisher. This should be a reverse domain-name style +# string, e.g. com.mycompany.MyDocSet.documentation. +# The default value is: org.doxygen.Publisher. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_PUBLISHER_ID = org.doxygen.Publisher + +# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher. +# The default value is: Publisher. +# This tag requires that the tag GENERATE_DOCSET is set to YES. + +DOCSET_PUBLISHER_NAME = Publisher + +# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three +# additional HTML index files: index.hhp, index.hhc, and index.hhk. The +# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop +# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on +# Windows. +# +# The HTML Help Workshop contains a compiler that can convert all HTML output +# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML +# files are now used as the Windows 98 help format, and will replace the old +# Windows help format (.hlp) on all Windows platforms in the future. Compressed +# HTML files also contain an index, a table of contents, and you can search for +# words in the documentation. The HTML workshop also contains a viewer for +# compressed HTML files. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_HTMLHELP = NO + +# The CHM_FILE tag can be used to specify the file name of the resulting .chm +# file. You can add a path in front of the file if the result should not be +# written to the html output directory. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +CHM_FILE = + +# The HHC_LOCATION tag can be used to specify the location (absolute path +# including file name) of the HTML help compiler (hhc.exe). If non-empty, +# doxygen will try to run the HTML help compiler on the generated index.hhp. +# The file has to be specified with full path. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +HHC_LOCATION = + +# The GENERATE_CHI flag controls if a separate .chi index file is generated +# (YES) or that it should be included in the master .chm file (NO). +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +GENERATE_CHI = NO + +# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc) +# and project file content. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +CHM_INDEX_ENCODING = + +# The BINARY_TOC flag controls whether a binary table of contents is generated +# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it +# enables the Previous and Next buttons. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +BINARY_TOC = NO + +# The TOC_EXPAND flag can be set to YES to add extra items for group members to +# the table of contents of the HTML help documentation and to the tree view. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTMLHELP is set to YES. + +TOC_EXPAND = NO + +# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and +# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that +# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help +# (.qch) of the generated HTML documentation. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_QHP = NO + +# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify +# the file name of the resulting .qch file. The path specified is relative to +# the HTML output folder. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QCH_FILE = + +# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help +# Project output. For more information please see Qt Help Project / Namespace +# (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#namespace). +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_NAMESPACE = org.doxygen.Project + +# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt +# Help Project output. For more information please see Qt Help Project / Virtual +# Folders (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#virtual- +# folders). +# The default value is: doc. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_VIRTUAL_FOLDER = doc + +# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom +# filter to add. For more information please see Qt Help Project / Custom +# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom- +# filters). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_CUST_FILTER_NAME = + +# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the +# custom filter to add. For more information please see Qt Help Project / Custom +# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom- +# filters). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_CUST_FILTER_ATTRS = + +# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this +# project's filter section matches. Qt Help Project / Filter Attributes (see: +# http://qt-project.org/doc/qt-4.8/qthelpproject.html#filter-attributes). +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHP_SECT_FILTER_ATTRS = + +# The QHG_LOCATION tag can be used to specify the location of Qt's +# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the +# generated .qhp file. +# This tag requires that the tag GENERATE_QHP is set to YES. + +QHG_LOCATION = + +# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be +# generated, together with the HTML files, they form an Eclipse help plugin. To +# install this plugin and make it available under the help contents menu in +# Eclipse, the contents of the directory containing the HTML and XML files needs +# to be copied into the plugins directory of eclipse. The name of the directory +# within the plugins directory should be the same as the ECLIPSE_DOC_ID value. +# After copying Eclipse needs to be restarted before the help appears. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_ECLIPSEHELP = NO + +# A unique identifier for the Eclipse help plugin. When installing the plugin +# the directory name containing the HTML and XML files should also have this +# name. Each documentation set should have its own identifier. +# The default value is: org.doxygen.Project. +# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES. + +ECLIPSE_DOC_ID = org.doxygen.Project + +# If you want full control over the layout of the generated HTML pages it might +# be necessary to disable the index and replace it with your own. The +# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top +# of each HTML page. A value of NO enables the index and the value YES disables +# it. Since the tabs in the index contain the same information as the navigation +# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +DISABLE_INDEX = NO + +# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index +# structure should be generated to display hierarchical information. If the tag +# value is set to YES, a side panel will be generated containing a tree-like +# index structure (just like the one that is generated for HTML Help). For this +# to work a browser that supports JavaScript, DHTML, CSS and frames is required +# (i.e. any modern browser). Windows users are probably better off using the +# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can +# further fine-tune the look of the index. As an example, the default style +# sheet generated by doxygen has an example that shows how to put an image at +# the root of the tree instead of the PROJECT_NAME. Since the tree basically has +# the same information as the tab index, you could consider setting +# DISABLE_INDEX to YES when enabling this option. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +GENERATE_TREEVIEW = NO + +# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that +# doxygen will group on one line in the generated HTML documentation. +# +# Note that a value of 0 will completely suppress the enum values from appearing +# in the overview section. +# Minimum value: 0, maximum value: 20, default value: 4. +# This tag requires that the tag GENERATE_HTML is set to YES. + +ENUM_VALUES_PER_LINE = 4 + +# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used +# to set the initial width (in pixels) of the frame in which the tree is shown. +# Minimum value: 0, maximum value: 1500, default value: 250. +# This tag requires that the tag GENERATE_HTML is set to YES. + +TREEVIEW_WIDTH = 250 + +# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to +# external symbols imported via tag files in a separate window. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +EXT_LINKS_IN_WINDOW = NO + +# Use this tag to change the font size of LaTeX formulas included as images in +# the HTML documentation. When you change the font size after a successful +# doxygen run you need to manually remove any form_*.png images from the HTML +# output directory to force them to be regenerated. +# Minimum value: 8, maximum value: 50, default value: 10. +# This tag requires that the tag GENERATE_HTML is set to YES. + +FORMULA_FONTSIZE = 10 + +# Use the FORMULA_TRANPARENT tag to determine whether or not the images +# generated for formulas are transparent PNGs. Transparent PNGs are not +# supported properly for IE 6.0, but are supported on all modern browsers. +# +# Note that when changing this option you need to delete any form_*.png files in +# the HTML output directory before the changes have effect. +# The default value is: YES. +# This tag requires that the tag GENERATE_HTML is set to YES. + +FORMULA_TRANSPARENT = YES + +# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see +# http://www.mathjax.org) which uses client side Javascript for the rendering +# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX +# installed or if you want to formulas look prettier in the HTML output. When +# enabled you may also need to install MathJax separately and configure the path +# to it using the MATHJAX_RELPATH option. +# The default value is: NO. +# This tag requires that the tag GENERATE_HTML is set to YES. + +USE_MATHJAX = NO + +# When MathJax is enabled you can set the default output format to be used for +# the MathJax output. See the MathJax site (see: +# http://docs.mathjax.org/en/latest/output.html) for more details. +# Possible values are: HTML-CSS (which is slower, but has the best +# compatibility), NativeMML (i.e. MathML) and SVG. +# The default value is: HTML-CSS. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_FORMAT = HTML-CSS + +# When MathJax is enabled you need to specify the location relative to the HTML +# output directory using the MATHJAX_RELPATH option. The destination directory +# should contain the MathJax.js script. For instance, if the mathjax directory +# is located at the same level as the HTML output directory, then +# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax +# Content Delivery Network so you can quickly see the result without installing +# MathJax. However, it is strongly recommended to install a local copy of +# MathJax from http://www.mathjax.org before deployment. +# The default value is: http://cdn.mathjax.org/mathjax/latest. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_RELPATH = http://cdn.mathjax.org/mathjax/latest + +# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax +# extension names that should be enabled during MathJax rendering. For example +# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_EXTENSIONS = + +# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces +# of code that will be used on startup of the MathJax code. See the MathJax site +# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an +# example see the documentation. +# This tag requires that the tag USE_MATHJAX is set to YES. + +MATHJAX_CODEFILE = + +# When the SEARCHENGINE tag is enabled doxygen will generate a search box for +# the HTML output. The underlying search engine uses javascript and DHTML and +# should work on any modern browser. Note that when using HTML help +# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET) +# there is already a search function so this one should typically be disabled. +# For large projects the javascript based search engine can be slow, then +# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to +# search using the keyboard; to jump to the search box use + S +# (what the is depends on the OS and browser, but it is typically +# , /