/* Pointer function to SymInitialize() */
-typedef BOOL(WINAPI * xbt_pfn_sym_initialize_t) (HANDLE, PSTR, BOOL);
+BOOL(WINAPI * fun_initialize) (HANDLE, PSTR, BOOL);
/* Pointer function to SymCleanup() */
-typedef BOOL(WINAPI * xbt_pfn_sym_cleanup_t) (HANDLE hProcess);
+static BOOL(WINAPI * fun_cleanup) (HANDLE hProcess);
/* Pointer function to SymFunctionTableAccess() */
-typedef PVOID(WINAPI * xbt_pfn_sym_function_table_access_t) (HANDLE, DWORD);
+static PVOID(WINAPI * fun_function_table_access) (HANDLE, DWORD);
/* Pointer function to SymGetLineFromAddr() */
-typedef BOOL(WINAPI * xbt_pfn_sym_get_line_from_addr_t) (HANDLE, DWORD,
- PDWORD,
- PIMAGEHLP_LINE);
+static BOOL(WINAPI * fun_get_line_from_addr) (HANDLE, DWORD,
+ PDWORD,
+ PIMAGEHLP_LINE);
/* Pointer function to SymGetModuleBase() */
-typedef DWORD(WINAPI * xbt_pfn_sym_get_module_base_t) (HANDLE, DWORD);
+static DWORD(WINAPI * fun_get_module_base) (HANDLE, DWORD);
/* Pointer function to SymGetOptions() */
-typedef DWORD(WINAPI * xbt_pfn_sym_get_options_t) (VOID);
+static DWORD(WINAPI * fun_get_options) (VOID);
/* Pointer function to SymGetSymFromAddr() */
-typedef BOOL(WINAPI * xbt_pfn_sym_get_sym_from_addr_t) (HANDLE, DWORD, PDWORD,
- OUT PIMAGEHLP_SYMBOL);
+static BOOL(WINAPI * fun_get_sym_from_addr) (HANDLE, DWORD, PDWORD,
+ OUT PIMAGEHLP_SYMBOL);
/* Pointer function to SymSetOptions() */
-typedef DWORD(WINAPI * xbt_pfn_sym_set_options_t) (DWORD);
+static DWORD(WINAPI * fun_set_options) (DWORD);
/* Pointer function to StackWalk() */
-typedef BOOL(WINAPI * xbt_pfn_stack_walk_t) (DWORD, HANDLE, HANDLE,
- LPSTACKFRAME, PVOID,
- PREAD_PROCESS_MEMORY_ROUTINE,
- PFUNCTION_TABLE_ACCESS_ROUTINE,
- PGET_MODULE_BASE_ROUTINE,
- PTRANSLATE_ADDRESS_ROUTINE);
-
-/* This structure represents the debug_help library used interface */
-typedef struct s_xbt_debug_help {
- HINSTANCE instance;
- HANDLE process_handle;
- xbt_pfn_sym_initialize_t sym_initialize;
- xbt_pfn_sym_cleanup_t sym_cleanup;
- xbt_pfn_sym_function_table_access_t sym_function_table_access;
- xbt_pfn_sym_get_line_from_addr_t sym_get_line_from_addr;
- xbt_pfn_sym_get_module_base_t sym_get_module_base;
- xbt_pfn_sym_get_options_t sym_get_options;
- xbt_pfn_sym_get_sym_from_addr_t sym_get_sym_from_addr;
- xbt_pfn_sym_set_options_t sym_set_options;
- xbt_pfn_stack_walk_t stack_walk;
-} s_xbt_debug_hlp_t, *xbt_debug_hlp_t;
-
-
-/* the address to the unique reference to the debug help library interface */
-static xbt_debug_hlp_t dbg_hlp = NULL;
+static BOOL(WINAPI * xbt_pfn_stack_walk) (DWORD, HANDLE, HANDLE,
+ LPSTACKFRAME, PVOID,
+ PREAD_PROCESS_MEMORY_ROUTINE,
+ PFUNCTION_TABLE_ACCESS_ROUTINE,
+ PGET_MODULE_BASE_ROUTINE,
+ PTRANSLATE_ADDRESS_ROUTINE);
+
+static HINSTANCE instance = NULL;
+static HANDLE process_handle = NULL;
+
/* Module creation/destruction: nothing to do on linux */
void xbt_backtrace_init(void) {
- HANDLE process_handle = GetCurrentProcess();
+ process_handle = GetCurrentProcess();
- if (dbg_hlp) {
+ if (instance) {
/* debug help is already loaded */
return;
}
- /* allocation */
- dbg_hlp = xbt_new0(s_xbt_debug_hlp_t, 1);
-
/* load the library */
- dbg_hlp->instance = LoadLibraryA("Dbghelp.dll");
+ instance = LoadLibraryA("Dbghelp.dll");
- if (!dbg_hlp->instance) {
- free(dbg_hlp);
- dbg_hlp = NULL;
+ if (!instance)
return;
- }
/* get the pointers to debug help library exported functions */
- dbg_hlp->sym_initialize =
- (xbt_pfn_sym_initialize_t) GetProcAddress(dbg_hlp->instance, "SymInitialize");
-
- dbg_hlp->sym_cleanup =
- (xbt_pfn_sym_cleanup_t) GetProcAddress(dbg_hlp->instance, "SymCleanup");
-
- dbg_hlp->sym_function_table_access =
- (xbt_pfn_sym_function_table_access_t) GetProcAddress(dbg_hlp->instance, "SymFunctionTableAccess");
-
- dbg_hlp->sym_get_line_from_addr =
- (xbt_pfn_sym_get_line_from_addr_t) GetProcAddress(dbg_hlp->instance, "SymGetLineFromAddr");
-
- dbg_hlp->sym_get_module_base =
- (xbt_pfn_sym_get_module_base_t) GetProcAddress(dbg_hlp->instance, "SymGetModuleBase");
-
- dbg_hlp->sym_get_options =
- (xbt_pfn_sym_get_options_t) GetProcAddress(dbg_hlp->instance, "SymGetOptions");
-
- dbg_hlp->sym_get_sym_from_addr =
- (xbt_pfn_sym_get_sym_from_addr_t) GetProcAddress(dbg_hlp->instance, "SymGetSymFromAddr");
-
- dbg_hlp->sym_set_options =
- (xbt_pfn_sym_set_options_t) GetProcAddress(dbg_hlp->instance, "SymSetOptions");
-
- dbg_hlp->stack_walk =
- (xbt_pfn_stack_walk_t) GetProcAddress(dbg_hlp->instance, "StackWalk");
+ fun_initialize = GetProcAddress(instance, "SymInitialize");
+ fun_cleanup = GetProcAddress(instance, "SymCleanup");
+ fun_function_table_access = GetProcAddress(instance, "SymFunctionTableAccess");
+ fun_get_line_from_addr = GetProcAddress(instance, "SymGetLineFromAddr");
+ fun_get_module_base = GetProcAddress(instance, "SymGetModuleBase");
+ fun_get_options = GetProcAddress(instance, "SymGetOptions");
+ fun_get_sym_from_addr = GetProcAddress(instance, "SymGetSymFromAddr");
+ fun_set_options = GetProcAddress(instance, "SymSetOptions");
+ fun_stack_walk = GetProcAddress(instance, "StackWalk");
/* Check that everything worked well */
- if (!dbg_hlp->sym_initialize ||
- !dbg_hlp->sym_cleanup ||
- !dbg_hlp->sym_function_table_access ||
- !dbg_hlp->sym_get_line_from_addr ||
- !dbg_hlp->sym_get_module_base ||
- !dbg_hlp->sym_get_options ||
- !dbg_hlp->sym_get_sym_from_addr ||
- !dbg_hlp->sym_set_options ||
- !dbg_hlp->stack_walk
+ if (!fun_initialize ||
+ !fun_cleanup ||
+ !fun_function_table_access ||
+ !fun_get_line_from_addr ||
+ !fun_get_module_base ||
+ !fun_get_options ||
+ !fun_get_sym_from_addr ||
+ !fun_set_options ||
+ !fun_stack_walk
) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
+ FreeLibrary(instance);
+ instance = NULL;
return;
}
- dbg_hlp->process_handle = process_handle;
+ (*fun_set_options) ((*fun_get_options) () |
+ SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS);
- (*(dbg_hlp->sym_set_options)) ((*(dbg_hlp->sym_get_options)) () |
- SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS);
-
- if (!(*(dbg_hlp->sym_initialize)) (dbg_hlp->process_handle, 0, 1)) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
+ if (!(*fun_initialize) (process_handle, 0, 1)) {
+ FreeLibrary(instance);
+ instance = NULL;
}
}
void xbt_backtrace_exit(void) {
- if (!dbg_hlp)
+ if (!instance)
return;
- if ((dbg_hlp->sym_cleanup) (dbg_hlp->process_handle))
- FreeLibrary(dbg_hlp->instance);
-
+ if ((*fun_cleanup) (process_handle))
+ FreeLibrary(instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
+ instance = NULL;
}
/*
e->bt_strings = xbt_new(char *, e->used);
- for (i = 0; i < e->used; i++) {
- e->bt_strings[i] = xbt_strdup(backtrace_syms[i]);
- free(backtrace_syms[i]);
- }
+ for (i = 0; i < e->used; i++)
+ e->bt_strings[i] = backtrace_syms[i];
free(backtrace_syms);
}
stack_frame->AddrStack.Offset = context.Esp;
stack_frame->AddrStack.Mode = AddrModeFlat;
- if ((*(dbg_hlp->stack_walk)) (IMAGE_FILE_MACHINE_I386,
- dbg_hlp->process_handle,
- GetCurrentThread(),
- stack_frame,
- &context,
- NULL,
- dbg_hlp->sym_function_table_access,
- dbg_hlp->sym_get_module_base, NULL)
+ if ((*fun_stack_walk) (IMAGE_FILE_MACHINE_I386,
+ process_handle,
+ GetCurrentThread(),
+ stack_frame,
+ &context,
+ NULL,
+ fun_function_table_access,
+ fun_get_module_base, NULL)
&& !first) {
if (stack_frame->AddrReturn.Offset) {
- if ((*(dbg_hlp->sym_get_sym_from_addr))
- (dbg_hlp->process_handle, stack_frame->AddrPC.Offset, &offset,
- pSym)) {
- if ((*(dbg_hlp->sym_get_line_from_addr))
- (dbg_hlp->process_handle, stack_frame->AddrPC.Offset, &offset,
- &line_info))
+ if ((*fun_get_sym_from_addr) (process_handle, stack_frame->AddrPC.Offset, &offset, pSym)) {
+ if ((*fun_get_line_from_addr) (process_handle, stack_frame->AddrPC.Offset, &offset, &line_info))
buffer[pos++] = (void *) stack_frame;
}
} else {
if (NULL != stack_frame) {
- if ((*(dbg_hlp->sym_get_sym_from_addr))
- (dbg_hlp->process_handle, stack_frame->AddrPC.Offset, &offset,
- pSym)) {
- if ((*(dbg_hlp->sym_get_line_from_addr))
- (dbg_hlp->process_handle, stack_frame->AddrPC.Offset, &offset,
- &line_info)) {
+ if ((*fun_get_sym_from_addr) (process_handle, stack_frame->AddrPC.Offset, &offset, pSym)) {
+ if ((*fun_get_line_from_addr) (process_handle, stack_frame->AddrPC.Offset, &offset, &line_info)) {
strings[pos] =
bprintf("** In %s() at %s:%d", pSym->Name, line_info.FileName,
line_info.LineNumber);
