-/* $Id: ex.c 5173 2008-01-07 22:10:52Z mquinson $ */
+/* $Id$ */
/* backtrace_windows - backtrace displaying on windows platform */
/* This file is included by ex.c on need (windows x86) */
* under the terms of the license (GNU LGPL) which comes with this package. */
/*
- * Win32 (x86) implementation backtrace, backtrace_symbols
- * : support for application self-debugging.
+ * Win32 (x86) implementation backtrace, backtrace_symbols:
+ * support for application self-debugging.
*/
#include <dbghelp.h>
+
/* Pointer function to SymInitialize() */
typedef BOOL(WINAPI * xbt_pfn_sym_initialize_t) (HANDLE, PSTR, BOOL);
/* the address to the unique reference to the debug help library interface */
static xbt_debug_hlp_t dbg_hlp = NULL;
-/* initialize the debug help library */
-static int dbg_hlp_init(HANDLE process_handle);
+/* Module creation/destruction: nothing to do on linux */
+void xbt_backtrace_init(void) {
+ HANDLE process_handle = GetCurrentProcess();
+
+ if (dbg_hlp) {
+ /* 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");
+
+ if (!dbg_hlp->instance) {
+ free(dbg_hlp);
+ dbg_hlp = NULL;
+ 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");
+
+ /* 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
+ ) {
+ FreeLibrary(dbg_hlp->instance);
+ free(dbg_hlp);
+ dbg_hlp = NULL;
+ return;
+ }
+
+ dbg_hlp->process_handle = process_handle;
+
+ (*(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;
+ }
+}
+void xbt_backtrace_exit(void) {
+ if (!dbg_hlp)
+ return;
+
+ if ((dbg_hlp->sym_cleanup) (dbg_hlp->process_handle))
+ FreeLibrary(dbg_hlp->instance);
+
-/* finalize the debug help library */
-static int dbg_hlp_finalize(void);
+ free(dbg_hlp);
+ dbg_hlp = NULL;
+}
/*
* backtrace() function.
/* ebp points on stack base */
/* esp points on stack pointer, ie on last stacked element (current element) */
_asm call $ + 5
- _asm pop eax
- _asm mov context.Eip, eax
- _asm mov eax, esp
- _asm mov context.Esp, eax
- _asm mov context.Ebp, ebp dbg_hlp_init(GetCurrentProcess());
+ _asm pop eax
+ _asm mov context.Eip, eax
+ _asm mov eax, esp
+ _asm mov context.Esp, eax
+ _asm mov context.Ebp, ebp
if ((NULL == dbg_hlp) || (size <= 0) || (NULL == buffer)) {
errno = EINVAL;
while (pos < size) {
stack_frame = (void *) xbt_new0(STACKFRAME, 1);
- if (!stack_frame) {
- errno = ENOMEM;
- break;
- }
-
stack_frame->AddrPC.Offset = context.Eip;
stack_frame->AddrPC.Mode = AddrModeFlat;
strings = xbt_new0(char *, size);
- if (NULL == strings) {
- errno = ENOMEM;
- return NULL;
- }
-
pSym = (IMAGEHLP_SYMBOL *) __buffer;
pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL);
strings = NULL;
}
- dbg_hlp_finalize();
-
return strings;
}
-
-static int dbg_hlp_init(HANDLE process_handle)
-{
- if (dbg_hlp) {
- /* debug help is already loaded */
- return 0;
- }
-
- /* allocation */
- dbg_hlp = xbt_new0(s_xbt_debug_hlp_t, 1);
-
- if (!dbg_hlp)
- return ENOMEM;
-
- /* load the library */
- dbg_hlp->instance = LoadLibraryA("Dbghelp.dll");
-
- if (!(dbg_hlp->instance)) {
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- /* get the pointers to debug help library exported functions */
-
- if (!
- ((dbg_hlp->sym_initialize) =
- (xbt_pfn_sym_initialize_t) GetProcAddress(dbg_hlp->instance,
- "SymInitialize"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_cleanup) =
- (xbt_pfn_sym_cleanup_t) GetProcAddress(dbg_hlp->instance,
- "SymCleanup"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_function_table_access) =
- (xbt_pfn_sym_function_table_access_t) GetProcAddress(dbg_hlp->instance,
- "SymFunctionTableAccess")))
- {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_get_line_from_addr) =
- (xbt_pfn_sym_get_line_from_addr_t) GetProcAddress(dbg_hlp->instance,
- "SymGetLineFromAddr")))
- {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_get_module_base) =
- (xbt_pfn_sym_get_module_base_t) GetProcAddress(dbg_hlp->instance,
- "SymGetModuleBase"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_get_options) =
- (xbt_pfn_sym_get_options_t) GetProcAddress(dbg_hlp->instance,
- "SymGetOptions"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_get_sym_from_addr) =
- (xbt_pfn_sym_get_sym_from_addr_t) GetProcAddress(dbg_hlp->instance,
- "SymGetSymFromAddr")))
- {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->sym_set_options) =
- (xbt_pfn_sym_set_options_t) GetProcAddress(dbg_hlp->instance,
- "SymSetOptions"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- if (!
- ((dbg_hlp->stack_walk) =
- (xbt_pfn_stack_walk_t) GetProcAddress(dbg_hlp->instance,
- "StackWalk"))) {
- FreeLibrary(dbg_hlp->instance);
- free(dbg_hlp);
- dbg_hlp = NULL;
- return (int) GetLastError();
- }
-
- dbg_hlp->process_handle = process_handle;
-
- (*(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;
- return (int) GetLastError();
- }
-
-
- return 0;
-}
-
-static int dbg_hlp_finalize(void)
-{
- if (!dbg_hlp)
- return EINVAL;
-
- if (!(*(dbg_hlp->sym_cleanup)) (dbg_hlp->process_handle))
- return (int) GetLastError();
-
- if (!FreeLibrary(dbg_hlp->instance))
- return (int) GetLastError();
-
- free(dbg_hlp);
- dbg_hlp = NULL;
-
- return 0;
-}
