#define BT_BUF_SIZE 100
#endif /* HAVE_BACKTRACE */
+#ifdef HAVE_DBGHELP
+#include <Windows.h>
+#include <dbghelp.h>
+#include <tlhelp32.h>
+#endif /* HAVE_DBGHELP */
+
extern gboolean gst_is_initialized (void);
/* we want these symbols exported even if debug is disabled, to maintain
#define generate_backtrace_trace() NULL
#endif /* HAVE_BACKTRACE */
+#ifdef HAVE_DBGHELP
+static void
+dbghelp_initialize_symbols (HANDLE process)
+{
+ static gsize initialization_value = 0;
+
+ if (g_once_init_enter (&initialization_value)) {
+ GST_INFO ("Initializing Windows symbol handler");
+ SymSetOptions (SYMOPT_LOAD_LINES);
+ SymInitialize (process, NULL, TRUE);
+ GST_INFO ("Initialized Windows symbol handler");
+
+ g_once_init_leave (&initialization_value, 1);
+ }
+}
+
+static gchar *
+generate_dbghelp_trace (void)
+{
+ HANDLE process = GetCurrentProcess ();
+ HANDLE thread = GetCurrentThread ();
+ IMAGEHLP_MODULE64 module_info;
+ DWORD machine;
+ CONTEXT context;
+ STACKFRAME64 frame = { 0 };
+ PVOID save_context;
+ GString *trace = g_string_new (NULL);
+
+ dbghelp_initialize_symbols (process);
+
+ memset (&context, 0, sizeof (CONTEXT));
+ context.ContextFlags = CONTEXT_FULL;
+
+ RtlCaptureContext (&context);
+
+ frame.AddrPC.Mode = AddrModeFlat;
+ frame.AddrStack.Mode = AddrModeFlat;
+ frame.AddrFrame.Mode = AddrModeFlat;
+
+#if (defined _M_IX86)
+ machine = IMAGE_FILE_MACHINE_I386;
+ frame.AddrFrame.Offset = context.Ebp;
+ frame.AddrPC.Offset = context.Eip;
+ frame.AddrStack.Offset = context.Esp;
+#elif (defined _M_X64)
+ machine = IMAGE_FILE_MACHINE_AMD64;
+ frame.AddrFrame.Offset = context.Rbp;
+ frame.AddrPC.Offset = context.Rip;
+ frame.AddrStack.Offset = context.Rsp;
+#else
+ goto done;
+#endif
+
+ module_info.SizeOfStruct = sizeof (module_info);
+ save_context = (machine == IMAGE_FILE_MACHINE_I386) ? NULL : &context;
+
+ while (TRUE) {
+ char buffer[sizeof (SYMBOL_INFO) + MAX_SYM_NAME * sizeof (TCHAR)];
+ PSYMBOL_INFO symbol = (PSYMBOL_INFO) buffer;
+ IMAGEHLP_LINE64 line;
+ DWORD displacement = 0;
+
+ symbol->SizeOfStruct = sizeof (SYMBOL_INFO);
+ symbol->MaxNameLen = MAX_SYM_NAME;
+
+ line.SizeOfStruct = sizeof (line);
+
+ if (!StackWalk64 (machine, process, thread, &frame, save_context, 0,
+ SymFunctionTableAccess64, SymGetModuleBase64, 0))
+ break;
+
+ if (SymFromAddr (process, frame.AddrPC.Offset, 0, symbol))
+ g_string_append_printf (trace, "%s ", symbol->Name);
+ else
+ g_string_append (trace, "?? ");
+
+ if (SymGetLineFromAddr64 (process, frame.AddrPC.Offset, &displacement,
+ &line))
+ g_string_append_printf (trace, "(%s:%u)", line.FileName, line.LineNumber);
+ else if (SymGetModuleInfo64 (process, frame.AddrPC.Offset, &module_info))
+ g_string_append_printf (trace, "(%s)", module_info.ImageName);
+ else
+ g_string_append_printf (trace, "(%s)", "??");
+
+ g_string_append (trace, "\n");
+ }
+
+done:
+ return g_string_free (trace, FALSE);
+}
+#endif /* HAVE_DBGHELP */
+
/**
* gst_debug_get_stack_trace:
* @flags: A set of #GstStackTraceFlags to determine how the stack
trace = generate_unwind_trace (flags);
#endif /* HAVE_UNWIND */
+#ifdef HAVE_DBGHELP
+ trace = generate_dbghelp_trace ();
+#endif
+
if (trace)
return trace;
else if (have_backtrace)
/**
* gst_debug_print_stack_trace:
*
- * If libunwind or glibc backtrace are present
+ * If libunwind, glibc backtrace or DbgHelp are present
* a stack trace is printed.
*/
void
backtrace_deps = []
unwind_dep = dependency('libunwind', required : get_option('libunwind'))
dw_dep = dependency('libdw', required: get_option('libdw'))
-backtrace_deps = [unwind_dep, dw_dep]
+dbghelp_dep = dependency('DbgHelp', required : get_option('dbghelp'))
+backtrace_deps = [unwind_dep, dw_dep, dbghelp_dep]
if unwind_dep.found()
cdata.set('HAVE_UNWIND', 1)
if dw_dep.found()
else
message('Support for backtraces is partial only.')
endif
+elif cc.has_function('backtrace')
+ cdata.set('HAVE_BACKTRACE', 1)
+elif dbghelp_dep.found()
+ cdata.set('HAVE_DBGHELP', 1)
else
- if cc.has_function('backtrace')
- cdata.set('HAVE_BACKTRACE', 1)
- else
- message('NO backtraces support.')
- endif
+ message('NO backtraces support.')
endif
if cc.has_header('execinfo.h')