From 043c35779713a14e0916a1b3e31e006cd1270ee4 Mon Sep 17 00:00:00 2001 From: Markus Metzger Date: Fri, 17 Jan 2014 13:29:19 +0100 Subject: [PATCH] btrace: add format argument to supports_btrace Add a format argument to the various supports_btrace functions to check for support of a specific btrace format. This is to prepare for a new format. Removed two redundant calls. The check will be made in the subsequent btrace_enable call. 2015-02-09 Markus Metzger * btrace.c (btrace_enable): Pass BTRACE_FORMAT_BTS. * record-btrace.c (record_btrace_open): Remove call to target_supports_btrace. * remote.c (remote_supports_btrace): Update parameters. * target.c (target_supports_btrace): Update parameters. * target.h (to_supports_btrace, target_supports_btrace): Update parameters. * target-delegates.c: Regenerate. * target-debug.h (target_debug_print_enum_btrace_format): New. * nat/linux-btrace.c (kernel_supports_btrace): Rename into ... (kernel_supports_bts): ... this. Update users. Update warning text. (intel_supports_btrace): Rename into ... (intel_supports_bts): ... this. Update users. (cpu_supports_btrace): Rename into ... (cpu_supports_bts): ... this. Update users. (linux_supports_btrace): Update parameters. Split into this and ... (linux_supports_bts): ... this. * nat/linux-btrace.h (linux_supports_btrace): Update parameters. gdbserver/ * server.c (handle_btrace_general_set): Remove call to target_supports_btrace. (supported_btrace_packets): New. (handle_query): Call supported_btrace_packets. * target.h: include btrace-common.h. (btrace_target_info): Removed. (supports_btrace, target_supports_btrace): Update parameters. --- gdb/ChangeLog | 22 +++++++++++++++++++ gdb/btrace.c | 2 +- gdb/gdbserver/ChangeLog | 10 +++++++++ gdb/gdbserver/server.c | 27 ++++++++++++----------- gdb/gdbserver/target.h | 8 +++---- gdb/nat/linux-btrace.c | 57 ++++++++++++++++++++++++++++++++----------------- gdb/nat/linux-btrace.h | 2 +- gdb/record-btrace.c | 3 --- gdb/remote.c | 15 +++++++++---- gdb/target-debug.h | 2 ++ gdb/target-delegates.c | 12 ++++++----- gdb/target.c | 8 +++++++ gdb/target.h | 5 ++--- 13 files changed, 120 insertions(+), 53 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 12b8e9f..255daa1 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,27 @@ 2015-02-09 Markus Metzger + * btrace.c (btrace_enable): Pass BTRACE_FORMAT_BTS. + * record-btrace.c (record_btrace_open): Remove call to + target_supports_btrace. + * remote.c (remote_supports_btrace): Update parameters. + * target.c (target_supports_btrace): Update parameters. + * target.h (to_supports_btrace, target_supports_btrace): Update + parameters. + * target-delegates.c: Regenerate. + * target-debug.h (target_debug_print_enum_btrace_format): New. + * nat/linux-btrace.c + (kernel_supports_btrace): Rename into ... + (kernel_supports_bts): ... this. Update users. Update warning text. + (intel_supports_btrace): Rename into ... + (intel_supports_bts): ... this. Update users. + (cpu_supports_btrace): Rename into ... + (cpu_supports_bts): ... this. Update users. + (linux_supports_btrace): Update parameters. Split into this and ... + (linux_supports_bts): ... this. + * nat/linux-btrace.h (linux_supports_btrace): Update parameters. + +2015-02-09 Markus Metzger + * Makefile.in (SFILES): Add common/btrace-common.c. (COMMON_OBS): Add common/btrace-common.o. (btrace-common.o): Add build rules. diff --git a/gdb/btrace.c b/gdb/btrace.c index 3b20981..4e32bdc 100644 --- a/gdb/btrace.c +++ b/gdb/btrace.c @@ -731,7 +731,7 @@ btrace_enable (struct thread_info *tp) if (tp->btrace.target != NULL) return; - if (!target_supports_btrace ()) + if (!target_supports_btrace (BTRACE_FORMAT_BTS)) error (_("Target does not support branch tracing.")); DEBUG ("enable thread %d (%s)", tp->num, target_pid_to_str (tp->ptid)); diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index fd8402e..636ad2e 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,5 +1,15 @@ 2015-02-09 Markus Metzger + * server.c (handle_btrace_general_set): Remove call to + target_supports_btrace. + (supported_btrace_packets): New. + (handle_query): Call supported_btrace_packets. + * target.h: include btrace-common.h. + (btrace_target_info): Removed. + (supports_btrace, target_supports_btrace): Update parameters. + +2015-02-09 Markus Metzger + * Makefile.in (SFILES): Add common/btrace-common.c. (OBS): Add common/btrace-common.o. (btrace-common.o): Add build rules. diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c index 0e72cf1..1756a1f 100644 --- a/gdb/gdbserver/server.c +++ b/gdb/gdbserver/server.c @@ -426,12 +426,6 @@ handle_btrace_general_set (char *own_buf) op = own_buf + strlen ("Qbtrace:"); - if (!target_supports_btrace ()) - { - strcpy (own_buf, "E.Target does not support branch tracing."); - return -1; - } - if (ptid_equal (general_thread, null_ptid) || ptid_equal (general_thread, minus_one_ptid)) { @@ -1692,6 +1686,20 @@ crc32 (CORE_ADDR base, int len, unsigned int crc) return (unsigned long long) crc; } +/* Add supported btrace packets to BUF. */ + +static void +supported_btrace_packets (char *buf) +{ + if (target_supports_btrace (BTRACE_FORMAT_BTS)) + strcat (buf, ";Qbtrace:bts+"); + else + return; + + strcat (buf, ";Qbtrace:off+"); + strcat (buf, ";qXfer:btrace:read+"); +} + /* Handle all of the extended 'q' packets. */ void @@ -1923,12 +1931,7 @@ handle_query (char *own_buf, int packet_len, int *new_packet_len_p) if (target_supports_agent ()) strcat (own_buf, ";QAgent+"); - if (target_supports_btrace ()) - { - strcat (own_buf, ";Qbtrace:bts+"); - strcat (own_buf, ";Qbtrace:off+"); - strcat (own_buf, ";qXfer:btrace:read+"); - } + supported_btrace_packets (own_buf); return; } diff --git a/gdb/gdbserver/target.h b/gdb/gdbserver/target.h index bbb0567..ed57886 100644 --- a/gdb/gdbserver/target.h +++ b/gdb/gdbserver/target.h @@ -26,9 +26,9 @@ #include "target/wait.h" #include "target/waitstatus.h" #include "mem-break.h" +#include "btrace-common.h" struct emit_ops; -struct btrace_target_info; struct buffer; struct process_info; @@ -355,7 +355,7 @@ struct target_ops int (*supports_agent) (void); /* Check whether the target supports branch tracing. */ - int (*supports_btrace) (struct target_ops *); + int (*supports_btrace) (struct target_ops *, enum btrace_format); /* Enable branch tracing for @ptid and allocate a branch trace target information struct for reading and for disabling branch trace. */ @@ -489,9 +489,9 @@ int kill_inferior (int); (the_target->supports_agent ? \ (*the_target->supports_agent) () : 0) -#define target_supports_btrace() \ +#define target_supports_btrace(format) \ (the_target->supports_btrace \ - ? (*the_target->supports_btrace) (the_target) : 0) + ? (*the_target->supports_btrace) (the_target, format) : 0) #define target_enable_btrace(ptid) \ (*the_target->enable_btrace) (ptid) diff --git a/gdb/nat/linux-btrace.c b/gdb/nat/linux-btrace.c index 6cec5d0..08eb49b 100644 --- a/gdb/nat/linux-btrace.c +++ b/gdb/nat/linux-btrace.c @@ -248,10 +248,10 @@ perf_event_read_bts (struct btrace_target_info* tinfo, const uint8_t *begin, return btrace; } -/* Check whether the kernel supports branch tracing. */ +/* Check whether the kernel supports BTS. */ static int -kernel_supports_btrace (void) +kernel_supports_bts (void) { struct perf_event_attr attr; pid_t child, pid; @@ -262,14 +262,14 @@ kernel_supports_btrace (void) switch (child) { case -1: - warning (_("test branch tracing: cannot fork: %s."), strerror (errno)); + warning (_("test bts: cannot fork: %s."), strerror (errno)); return 0; case 0: status = ptrace (PTRACE_TRACEME, 0, NULL, NULL); if (status != 0) { - warning (_("test branch tracing: cannot PTRACE_TRACEME: %s."), + warning (_("test bts: cannot PTRACE_TRACEME: %s."), strerror (errno)); _exit (1); } @@ -277,7 +277,7 @@ kernel_supports_btrace (void) status = raise (SIGTRAP); if (status != 0) { - warning (_("test branch tracing: cannot raise SIGTRAP: %s."), + warning (_("test bts: cannot raise SIGTRAP: %s."), strerror (errno)); _exit (1); } @@ -288,14 +288,14 @@ kernel_supports_btrace (void) pid = waitpid (child, &status, 0); if (pid != child) { - warning (_("test branch tracing: bad pid %ld, error: %s."), + warning (_("test bts: bad pid %ld, error: %s."), (long) pid, strerror (errno)); return 0; } if (!WIFSTOPPED (status)) { - warning (_("test branch tracing: expected stop. status: %d."), + warning (_("test bts: expected stop. status: %d."), status); return 0; } @@ -320,10 +320,10 @@ kernel_supports_btrace (void) pid = waitpid (child, &status, 0); if (pid != child) { - warning (_("test branch tracing: bad pid %ld, error: %s."), + warning (_("test bts: bad pid %ld, error: %s."), (long) pid, strerror (errno)); if (!WIFSIGNALED (status)) - warning (_("test branch tracing: expected killed. status: %d."), + warning (_("test bts: expected killed. status: %d."), status); } @@ -331,10 +331,10 @@ kernel_supports_btrace (void) } } -/* Check whether an Intel cpu supports branch tracing. */ +/* Check whether an Intel cpu supports BTS. */ static int -intel_supports_btrace (void) +intel_supports_bts (void) { unsigned int cpuid, model, family; @@ -372,10 +372,10 @@ intel_supports_btrace (void) return 1; } -/* Check whether the cpu supports branch tracing. */ +/* Check whether the cpu supports BTS. */ static int -cpu_supports_btrace (void) +cpu_supports_bts (void) { unsigned int ebx, ecx, edx; @@ -384,24 +384,24 @@ cpu_supports_btrace (void) if (ebx == signature_INTEL_ebx && ecx == signature_INTEL_ecx && edx == signature_INTEL_edx) - return intel_supports_btrace (); + return intel_supports_bts (); /* Don't know about others. Let's assume they do. */ return 1; } -/* See linux-btrace.h. */ +/* Check whether the linux target supports BTS. */ -int -linux_supports_btrace (struct target_ops *ops) +static int +linux_supports_bts (void) { static int cached; if (cached == 0) { - if (!kernel_supports_btrace ()) + if (!kernel_supports_bts ()) cached = -1; - else if (!cpu_supports_btrace ()) + else if (!cpu_supports_bts ()) cached = -1; else cached = 1; @@ -412,6 +412,23 @@ linux_supports_btrace (struct target_ops *ops) /* See linux-btrace.h. */ +int +linux_supports_btrace (struct target_ops *ops, enum btrace_format format) +{ + switch (format) + { + case BTRACE_FORMAT_NONE: + return 0; + + case BTRACE_FORMAT_BTS: + return linux_supports_bts (); + } + + internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); +} + +/* See linux-btrace.h. */ + struct btrace_target_info * linux_enable_btrace (ptid_t ptid) { @@ -602,7 +619,7 @@ linux_read_btrace (struct btrace_data *btrace, /* See linux-btrace.h. */ int -linux_supports_btrace (struct target_ops *ops) +linux_supports_btrace (struct target_ops *ops, enum btrace_format format) { return 0; } diff --git a/gdb/nat/linux-btrace.h b/gdb/nat/linux-btrace.h index 1b11aba..24e06e8 100644 --- a/gdb/nat/linux-btrace.h +++ b/gdb/nat/linux-btrace.h @@ -61,7 +61,7 @@ struct btrace_target_info }; /* See to_supports_btrace in target.h. */ -extern int linux_supports_btrace (struct target_ops *); +extern int linux_supports_btrace (struct target_ops *, enum btrace_format); /* See to_enable_btrace in target.h. */ extern struct btrace_target_info *linux_enable_btrace (ptid_t ptid); diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c index 7af549f..99c6684 100644 --- a/gdb/record-btrace.c +++ b/gdb/record-btrace.c @@ -199,9 +199,6 @@ record_btrace_open (const char *args, int from_tty) if (!target_has_execution) error (_("The program is not being run.")); - if (!target_supports_btrace ()) - error (_("Target does not support branch tracing.")); - if (non_stop) error (_("Record btrace can't debug inferior in non-stop mode.")); diff --git a/gdb/remote.c b/gdb/remote.c index e7557d7..61420ec 100644 --- a/gdb/remote.c +++ b/gdb/remote.c @@ -11324,16 +11324,23 @@ struct btrace_target_info /* Check whether the target supports branch tracing. */ static int -remote_supports_btrace (struct target_ops *self) +remote_supports_btrace (struct target_ops *self, enum btrace_format format) { if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE) return 0; - if (packet_support (PACKET_Qbtrace_bts) != PACKET_ENABLE) - return 0; if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE) return 0; - return 1; + switch (format) + { + case BTRACE_FORMAT_NONE: + return 0; + + case BTRACE_FORMAT_BTS: + return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE); + } + + internal_error (__FILE__, __LINE__, _("Unknown branch trace format")); } /* Enable branch tracing. */ diff --git a/gdb/target-debug.h b/gdb/target-debug.h index 8a32810..61cc3a5 100644 --- a/gdb/target-debug.h +++ b/gdb/target-debug.h @@ -146,6 +146,8 @@ target_debug_do_print (host_address_to_string (X)) #define target_debug_print_struct_btrace_data_p(X) \ target_debug_do_print (host_address_to_string (X)) +#define target_debug_print_enum_btrace_format(X) \ + target_debug_do_print (plongest (X)) static void target_debug_print_struct_target_waitstatus_p (struct target_waitstatus *status) diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c index 00956ba..9cdb31e 100644 --- a/gdb/target-delegates.c +++ b/gdb/target-delegates.c @@ -3085,26 +3085,28 @@ debug_can_use_agent (struct target_ops *self) } static int -delegate_supports_btrace (struct target_ops *self) +delegate_supports_btrace (struct target_ops *self, enum btrace_format arg1) { self = self->beneath; - return self->to_supports_btrace (self); + return self->to_supports_btrace (self, arg1); } static int -tdefault_supports_btrace (struct target_ops *self) +tdefault_supports_btrace (struct target_ops *self, enum btrace_format arg1) { return 0; } static int -debug_supports_btrace (struct target_ops *self) +debug_supports_btrace (struct target_ops *self, enum btrace_format arg1) { int result; fprintf_unfiltered (gdb_stdlog, "-> %s->to_supports_btrace (...)\n", debug_target.to_shortname); - result = debug_target.to_supports_btrace (&debug_target); + result = debug_target.to_supports_btrace (&debug_target, arg1); fprintf_unfiltered (gdb_stdlog, "<- %s->to_supports_btrace (", debug_target.to_shortname); target_debug_print_struct_target_ops_p (&debug_target); + fputs_unfiltered (", ", gdb_stdlog); + target_debug_print_enum_btrace_format (arg1); fputs_unfiltered (") = ", gdb_stdlog); target_debug_print_int (result); fputs_unfiltered ("\n", gdb_stdlog); diff --git a/gdb/target.c b/gdb/target.c index 763ddcb..d2f0050 100644 --- a/gdb/target.c +++ b/gdb/target.c @@ -3389,6 +3389,14 @@ target_ranged_break_num_registers (void) /* See target.h. */ +int +target_supports_btrace (enum btrace_format format) +{ + return current_target.to_supports_btrace (¤t_target, format); +} + +/* See target.h. */ + struct btrace_target_info * target_enable_btrace (ptid_t ptid) { diff --git a/gdb/target.h b/gdb/target.h index 36fa3c6..803ef28 100644 --- a/gdb/target.h +++ b/gdb/target.h @@ -999,7 +999,7 @@ struct target_ops TARGET_DEFAULT_RETURN (0); /* Check whether the target supports branch tracing. */ - int (*to_supports_btrace) (struct target_ops *) + int (*to_supports_btrace) (struct target_ops *, enum btrace_format) TARGET_DEFAULT_RETURN (0); /* Enable branch tracing for PTID and allocate a branch trace target @@ -2215,8 +2215,7 @@ extern void update_target_permissions (void); /* Imported from machine dependent code. */ /* See to_supports_btrace in struct target_ops. */ -#define target_supports_btrace() \ - (current_target.to_supports_btrace (¤t_target)) +extern int target_supports_btrace (enum btrace_format); /* See to_enable_btrace in struct target_ops. */ extern struct btrace_target_info *target_enable_btrace (ptid_t ptid); -- 2.7.4