/* ex - Exception Handling (modified to fit into SimGrid from OSSP version) */
-/* Copyright (c) 2005-2006 Martin Quinson */
+/* Copyright (c) 2005, 2006, 2007 Martin Quinson */
/* Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com> */
/* Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/> */
/* Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/> */
#include "portable.h" /* execinfo when available */
#include "xbt/ex.h"
+#include "xbt/str.h"
#include "xbt/module.h" /* xbt_binary_name */
-#include "xbt/ex_interface.h"
+#include "xbt/synchro.h" /* xbt_thread_self */
#include "gras/Virtu/virtu_interface.h" /* gras_os_myname */
+#include "xbt/ex_interface.h"
+
+#if (defined(WIN32) && defined(_M_IX86))
+#include <dbghelp.h>
+#endif
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex,xbt,"Exception mecanism");
+#if (defined(WIN32) && defined(_M_IX86))
+
+/*
+ * Win32 (x86) implementation backtrace, backtrace_symbols, backtrace_symbols_fd
+ * : support for application self-debugging.
+ */
+
+/* Pointer function to SymInitialize() */
+typedef BOOL (WINAPI *xbt_pfn_sym_initialize_t)(HANDLE, PSTR , BOOL);
+
+/* Pointer function to SymCleanup() */
+typedef BOOL (WINAPI *xbt_pfn_sym_cleanup_t)(HANDLE hProcess);
+
+/* Pointer function to SymFunctionTableAccess() */
+typedef PVOID (WINAPI *xbt_pfn_sym_function_table_access_t)(HANDLE, DWORD);
+
+/* Pointer function to SymGetLineFromAddr() */
+typedef BOOL (WINAPI *xbt_pfn_sym_get_line_from_addr_t)(HANDLE, DWORD, PDWORD , PIMAGEHLP_LINE);
+
+/* Pointer function to SymGetModuleBase() */
+typedef DWORD (WINAPI *xbt_pfn_sym_get_module_base_t)(HANDLE,DWORD);
+
+/* Pointer function to SymGetOptions() */
+typedef DWORD (WINAPI *xbt_pfn_sym_get_options_t)(VOID);
+
+/* Pointer function to SymGetSymFromAddr() */
+typedef BOOL (WINAPI *xbt_pfn_sym_get_sym_from_addr_t)(HANDLE, DWORD, PDWORD , OUT PIMAGEHLP_SYMBOL);
+
+/* Pointer function to SymSetOptions() */
+typedef DWORD (WINAPI *xbt_pfn_sym_set_options_t)(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 representes 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;
+
+/* initialize the debug help library */
+static int
+dbg_hlp_init(HANDLE process_handle);
+
+/* finalize the debug help library */
+static int
+dbg_hlp_finalize(void);
+
+/*
+ * backtrace() function.
+ *
+ * Returns a backtrace for the calling program, in the array
+ * pointed to by buffer. A backtrace is the series of currently active
+ * function calls for the program. Each item in the array pointed to by
+ * buffer is of type void *, and is the return address from the corre-
+ * sponding stack frame. The size argument specifies the maximum number
+ * of addresses that can be stored in buffer. If the backtrace is larger
+ * than size, then the addresses corresponding to the size most recent
+ * function calls are returned; to obtain the complete backtrace, make
+ * sure that buffer and size are large enough.
+ */
+
+int
+backtrace (void **buffer, int size);
+
+/*
+ * backtrace_symbols() function.
+ *
+ * Given the set of addresses returned by backtrace() in buffer, back-
+ * trace_symbols() translates the addresses into an array of strings containing
+ * the name, the source file and the line number or the las called functions.
+ */
+char **
+backtrace_symbols (void *const *buffer, int size);
+
+/*
+ * backtrace_symbols_fd() function.
+ *
+ * Same as backtrace_symbols() function but, the the array of strings is wrotten
+ * in a file (fd is the file descriptor of this file)
+ */
+void
+backtrace_symbols_fd(void *const *buffer, int size, int fd);
+#endif
/* default __ex_ctx callback function */
ex_ctx_t *__xbt_ex_ctx_default(void) {
+ /* Don't scream: this is a default which is never used (so, yes,
+ there is one setjump container by running entity).
+
+ This default gets overriden in xbt/xbt_os_thread.c so that it works in
+ real life and in simulation when using threads to implement the simulation
+ processes (ie, with pthreads and on windows).
+
+ It also gets overriden in xbt/context.c when using ucontextes (as well as
+ in Java for now, but after the java overhaul, it will get cleaned out)
+ */
static ex_ctx_t ctx = XBT_CTX_INITIALIZER;
return &ctx;
}
+/* Change raw libc symbols to file names and line numbers */
+void xbt_ex_setup_backtrace(xbt_ex_t *e);
-/** \brief show the backtrace of the current point (lovely while debuging) */
-void xbt_backtrace_display(void) {
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
- xbt_ex_t e;
- int i;
+void xbt_backtrace_current(xbt_ex_t *e) {
+#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE) || (defined(WIN32) && defined(_M_IX86))
+ e->used = backtrace((void**)e->bt,XBT_BACKTRACE_SIZE);
+ e->bt_strings = NULL;
+ xbt_ex_setup_backtrace(e);
+#endif
+}
- e.used = backtrace((void**)e.bt,XBT_BACKTRACE_SIZE);
- e.bt_strings = NULL;
- xbt_ex_setup_backtrace(&e);
- for (i=1; i<e.used; i++) /* no need to display "xbt_display_backtrace" */
- fprintf(stderr,"%s\n",e.bt_strings[i]);
+void xbt_backtrace_display(xbt_ex_t *e) {
+#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE) || (defined(WIN32) && defined(_M_IX86))
+ int i;
- e.msg=NULL;
- e.remote=0;
- xbt_ex_free(e);
+ if (e->used == 0) {
+ fprintf(stderr,"(backtrace not set)\n");
+ } else {
+ fprintf(stderr,"Backtrace (displayed in thread %p):\n",
+ (void*)xbt_thread_self());
+ for (i=1; i<e->used; i++) /* no need to display "xbt_display_backtrace" */
+ fprintf(stderr,"---> %s\n",e->bt_strings[i] +4);
+ }
+
+ /* don't fool xbt_ex_free with uninitialized msg field */
+ e->msg=NULL;
+ e->remote=0;
+ xbt_ex_free(*e);
#else
+
ERROR0("No backtrace on this arch");
#endif
}
+/** \brief show the backtrace of the current point (lovely while debuging) */
+void xbt_backtrace_display_current(void) {
+ xbt_ex_t e;
+ xbt_backtrace_current(&e);
+ xbt_backtrace_display(&e);
+}
+
+#ifndef WIN32
+extern char **environ; /* the environment, as specified by the opengroup */
+#endif
void xbt_ex_setup_backtrace(xbt_ex_t *e) {
#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
char **backtrace = backtrace_symbols (e->bt, e->used);
/* To build the commandline of addr2line */
- char *cmd = xbt_new(char,strlen(ADDR2LINE)+25+strlen(xbt_binary_name)+32*e->used);
- char *curr=cmd;
+ char *cmd, *curr;
/* to extract the addresses from the backtrace */
char **addrs=xbt_new(char*,e->used);
/* size (in char) of pointers on this arch */
int addr_len=0;
+ /* To search for the right executable path when not trivial */
+ struct stat stat_buf;
+ char *binary_name = NULL;
+
/* Some arches only have stubs of backtrace, no implementation (hppa comes to mind) */
if (!e->used)
return;
/* build the commandline */
- curr += sprintf(curr,"%s -f -e %s ",ADDR2LINE,xbt_binary_name);
+ if (stat(xbt_binary_name,&stat_buf)) {
+ /* Damn. binary not in current dir. We'll have to dig the PATH to find it */
+ int i;
+ for (i=0; environ[i]; i++) {
+ if (!strncmp("PATH=",environ[i], 5)) {
+ xbt_dynar_t path=xbt_str_split(environ[i] + 5, ":");
+ unsigned int cpt;
+ char *data;
+ xbt_dynar_foreach(path, cpt, data) {
+ if (binary_name)
+ free(binary_name);
+ binary_name = bprintf("%s/%s",data,xbt_binary_name);
+ if (!stat(binary_name,&stat_buf)) {
+ /* Found. */
+ DEBUG1("Looked in the PATH for the binary. Found %s",binary_name);
+ xbt_dynar_free(&path);
+ break;
+ }
+ }
+ if (stat(binary_name,&stat_buf)) {
+ /* not found */
+ e->used = 1;
+ e->bt_strings = xbt_new(char*,1);
+ e->bt_strings[0] = bprintf("(binary '%s' not found the path)",xbt_binary_name);
+ return;
+ }
+ xbt_dynar_free(&path);
+ break;
+ }
+ }
+ } else {
+ binary_name = xbt_strdup(xbt_binary_name);
+ }
+ cmd = curr = xbt_new(char,strlen(ADDR2LINE)+25+strlen(binary_name)+32*e->used);
+
+ curr += sprintf(curr,"%s -f -e %s ",ADDR2LINE,binary_name);
+ free(binary_name);
+
for (i=0; i<e->used;i++) {
/* retrieve this address */
DEBUG2("Retrieving address number %d from '%s'", i, backtrace[i]);
/* Add it to the command line args */
curr+=sprintf(curr,"%s ",addrs[i]);
- }
+ }
addr_len = strlen(addrs[0]);
/* parse the output and build a new backtrace */
offset = first;
found=1;
}
- DEBUG4("%#lx %s [%#lx-%#lx]",
- addr, found? "in":"out of",first,last);
+ if (found) {
+ DEBUG3("%#lx in [%#lx-%#lx]", addr, first,last);
+ DEBUG0("Symbol found, map lines not further displayed (even if looking for next ones)");
+ }
}
fclose(maps);
free(maps_name);
/* Got it. We have our new address. Let's get the library path and we
are set */
p = xbt_strdup(backtrace[i]);
- p2 = strrchr(p,'(');
- if (p2) *p2= '\0';
- p2 = strrchr(p,' ');
- if(p2) *p2= '\0';
+ if (p[0]=='[') {
+ /* library path not displayed in the map file either... */
+ free(p);
+ sprintf(line_func,"??");
+ } else {
+ p2 = strrchr(p,'(');
+ if (p2) *p2= '\0';
+ p2 = strrchr(p,' ');
+ if(p2) *p2= '\0';
- /* Here we go, fire an addr2line up */
- subcmd = bprintf("%s -f -e %s %s",ADDR2LINE,p, addrs[i]);
- free(p);
- VERB1("Fire a new command: '%s'",subcmd);
- subpipe = popen(subcmd,"r");
- if (!subpipe) {
- CRITICAL0("Cannot fork addr2line to display the backtrace");
- abort();
+ /* Here we go, fire an addr2line up */
+ subcmd = bprintf("%s -f -e %s %s",ADDR2LINE,p, addrs[i]);
+ free(p);
+ VERB1("Fire a new command: '%s'",subcmd);
+ subpipe = popen(subcmd,"r");
+ if (!subpipe) {
+ CRITICAL0("Cannot fork addr2line to display the backtrace");
+ abort();
+ }
+ fgets(line_func,1024,subpipe);
+ line_func[strlen(line_func)-1]='\0';
+ fgets(line_pos,1024,subpipe);
+ line_pos[strlen(line_pos)-1]='\0';
+ pclose(subpipe);
+ free(subcmd);
}
- fgets(line_func,1024,subpipe);
- line_func[strlen(line_func)-1]='\0';
- fgets(line_pos,1024,subpipe);
- line_pos[strlen(line_pos)-1]='\0';
- pclose(subpipe);
- free(subcmd);
/* check whether the trick worked */
if (strcmp("??",line_func)) {
} else {
/* damn, nothing to do here. Let's print the raw address */
DEBUG1("Dynamic symbol not found. Raw address = %s", backtrace[i]);
- e->bt_strings[i] = bprintf("** In ?? (%s)", backtrace[i]);
+ e->bt_strings[i] = bprintf("** In ?? at %s", backtrace[i]);
}
}
free(addrs[i]);
/* Mask the bottom of the stack */
- if (!strncmp("main",line_func,strlen("main"))) {
- int j;
- for (j=i+1; j<e->used; j++)
- free(addrs[j]);
- e->used = i+1;
- }
-
- if (!strncmp("__context_wrapper",line_func,strlen("__context_wrapper"))) {
+ if (!strncmp("main",line_func,strlen("main")) ||
+ !strncmp("xbt_thread_context_wrapper",line_func,strlen("xbt_thread_context_wrapper"))) {
int j;
for (j=i+1; j<e->used; j++)
free(addrs[j]);
e->used = i;
+
+ if (!strncmp("xbt_thread_context_wrapper",line_func,strlen("xbt_thread_context_wrapper"))) {
+ e->used++;
+ e->bt_strings[i] = bprintf("** (in a separate thread)");
+ }
}
-
+
}
pclose(pipe);
free(addrs);
free(backtrace);
free(cmd);
+#elif (defined(WIN32) && defined (_M_IX86))
+int i;
+ /* to get the backtrace from the libc */
+ char **backtrace = backtrace_symbols (e->bt, e->used);
+
+ /* parse the output and build a new backtrace */
+ e->bt_strings = xbt_new(char*,e->used);
+
+
+ for(i=0; i<e->used; i++)
+ {
+ e->bt_strings[i] = strdup(backtrace[i]);
+ free(backtrace[i]);
+ }
+
+ free(backtrace);
#endif
}
char *thrower=NULL;
if (e->remote)
- bprintf(" on host %s(%ld)",e->host,e->pid);
+ thrower = bprintf(" on host %s(%d)",e->host,e->pid);
- CRITICAL1("%s",e->msg);
fprintf(stderr,
- "** SimGrid: UNCAUGHT EXCEPTION received on %s(%ld): category: %s; value: %d\n"
+ "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n"
"** %s\n"
"** Thrown by %s()%s\n",
- gras_os_myname(),gras_os_getpid(),
+ gras_os_myname(),(*xbt_getpid)(),
xbt_ex_catname(e->category), e->value, e->msg,
e->procname,thrower?thrower:" in this process");
+ CRITICAL1("%s",e->msg);
if (thrower)
free(thrower);
if (!e->remote && !e->bt_strings)
xbt_ex_setup_backtrace(e);
-#if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
+#if (defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)) || (defined(WIN32) && defined(_M_IX86))
/* We have everything to build neat backtraces */
{
int i;
}
/* the externally visible API */
-XBT_PUBLIC_DATA(ex_ctx_cb_t) __xbt_ex_ctx = &__xbt_ex_ctx_default;
-XBT_PUBLIC_DATA(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
+XBT_EXPORT_NO_IMPORT(ex_ctx_cb_t) __xbt_ex_ctx = &__xbt_ex_ctx_default;
+XBT_EXPORT_NO_IMPORT(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
void xbt_ex_free(xbt_ex_t e) {
}
#ifndef HAVE_EXECINFO_H
+# if (defined(WIN32) && defined(_M_IX86))
+int
+backtrace (void **buffer, int size)
+{
+ int pos = 0;
+ STACKFRAME* stack_frame;
+ int first = 1;
+
+ CONTEXT context = {CONTEXT_FULL};
+ GetThreadContext(GetCurrentThread(), &context);
+
+ /* ebp pointe sur la base de la pile */
+ /* esp pointe sur le stack pointer <=> sur le dernier élément déposé dans la pile (l'élément courant) */
+ _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());
+
+ if((NULL == dbg_hlp) || (size <= 0) || (NULL == buffer))
+ {
+ errno = EINVAL;
+ return 0;
+ }
+
+ for(pos = 0; pos < size; pos++)
+ buffer[pos] = NULL;
+
+ pos = 0;
+
+ while(pos < size)
+ {
+ stack_frame = (void*)calloc(1,sizeof(STACKFRAME));
+
+ if(!stack_frame)
+ {
+ errno = ENOMEM;
+ break;
+ }
+
+ stack_frame->AddrPC.Offset = context.Eip;
+ stack_frame->AddrPC.Mode = AddrModeFlat;
+
+ stack_frame->AddrFrame.Offset = context.Ebp;
+ stack_frame->AddrFrame.Mode = AddrModeFlat;
+
+ 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)
+ && !first)
+ {
+ if(stack_frame->AddrReturn.Offset)
+ buffer[pos++] = (void*)stack_frame;
+ else
+ {
+ free(stack_frame); /* no symbol */
+ break;
+ }
+ }
+ else
+ {
+ free(stack_frame);
+
+ if(first)
+ first = 0;
+ else
+ break;
+ }
+ }
+
+ return pos;
+}
+
+char **
+backtrace_symbols (void *const *buffer, int size)
+{
+ int pos;
+ int success = 0;
+ char** strings;
+ STACKFRAME* stack_frame;
+ char str[MAX_SYM_NAME] = {0};
+ IMAGEHLP_SYMBOL * pSym;
+ unsigned long displacement = 0;
+ IMAGEHLP_LINE line_info = {0};
+ IMAGEHLP_MODULE module = {0};
+ byte __buffer[(sizeof(SYMBOL_INFO) +MAX_SYM_NAME * sizeof(TCHAR) + sizeof(ULONG64) - 1) / sizeof(ULONG64)];
+
+ if((NULL == dbg_hlp) || (size <= 0) || (NULL == buffer))
+ {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ strings = (char**)calloc(size,sizeof(char*));
+
+ if(NULL == strings)
+ {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ pSym = (IMAGEHLP_SYMBOL*)__buffer;
+
+ pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL);
+ pSym->MaxNameLength = MAX_SYM_NAME;
+
+
+ line_info.SizeOfStruct = sizeof(IMAGEHLP_LINE);
+ module.SizeOfStruct = sizeof(IMAGEHLP_MODULE);
+
+ for(pos = 0; pos < size; pos++)
+ {
+ stack_frame = (STACKFRAME*)(buffer[pos]);
+
+ if(NULL != stack_frame)
+ {
+
+ if((*(dbg_hlp->sym_get_sym_from_addr))(dbg_hlp->process_handle,stack_frame->AddrPC.Offset, &displacement,pSym))
+ {
+ if((*(dbg_hlp->sym_get_line_from_addr))(dbg_hlp->process_handle,stack_frame->AddrPC.Offset, &displacement,&line_info))
+ {
+
+ sprintf(str,"** In %s() at %s:%d", pSym->Name,line_info.FileName,line_info.LineNumber);
+
+ strings[pos] = strdup(str);
+ memset(str,0,MAX_SYM_NAME);
+
+ success = 1;
+ }
+ }
+
+ free(stack_frame);
+ }
+ else
+ break;
+ }
+
+ if(!success)
+ {
+ free(strings);
+ strings = NULL;
+ }
+
+ dbg_hlp_finalize();
+
+ return strings;
+}
+
+void
+backtrace_symbols_fd(void *const *buffer, int size, int fd)
+{
+ int pos;
+ int success = 0;
+ STACKFRAME* stack_frame;
+ char str[MAX_SYM_NAME] = {0};
+ IMAGEHLP_SYMBOL * pSym;
+ unsigned long displacement = 0;
+ IMAGEHLP_LINE line_info = {0};
+ IMAGEHLP_MODULE module = {0};
+
+ byte __buffer[(sizeof(SYMBOL_INFO) +MAX_SYM_NAME * sizeof(TCHAR) + sizeof(ULONG64) - 1) / sizeof(ULONG64)];
+
+ if((NULL == dbg_hlp) || (size <= 0) || (NULL == buffer) || (-1 == fd))
+ {
+ errno = EINVAL;
+ return;
+ }
+
+ pSym = (IMAGEHLP_SYMBOL*)__buffer;
+
+ pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL);
+ pSym->MaxNameLength = MAX_SYM_NAME;
+
+
+ line_info.SizeOfStruct = sizeof(IMAGEHLP_LINE);
+ module.SizeOfStruct = sizeof(IMAGEHLP_MODULE);
+
+ for(pos = 0; pos < size; pos++)
+ {
+ stack_frame = (STACKFRAME*)(buffer[pos]);
+
+ if(NULL != stack_frame)
+ {
+
+ if((*(dbg_hlp->sym_get_sym_from_addr))(dbg_hlp->process_handle,stack_frame->AddrPC.Offset, &displacement,pSym))
+ {
+ if((*(dbg_hlp->sym_get_line_from_addr))(dbg_hlp->process_handle,stack_frame->AddrPC.Offset, &displacement,&line_info))
+ {
+
+
+ sprintf(str,"** In %s() at %s:%d\n", pSym->Name,line_info.FileName,line_info.LineNumber);
+
+ if(-1 == write(fd,str,strlen(str)))
+ break;
+
+ memset(str,0,MAX_SYM_NAME);
+
+ success = 1;
+ }
+ }
+
+ free(stack_frame);
+ }
+ else
+ break;
+ }
+
+ dbg_hlp_finalize();
+
+}
+
+static int
+dbg_hlp_init(HANDLE process_handle)
+{
+ if(dbg_hlp)
+ {
+ /* debug help is already loaded */
+ return 0;
+ }
+
+ /* allocation */
+ dbg_hlp = (xbt_debug_hlp_t)calloc(1,sizeof(s_xbt_debug_hlp_t));
+
+ 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;
+}
+# endif
+#else
/* dummy implementation. We won't use the result, but ex.h needs it to be defined */
int backtrace (void **__array, int __size) {
- return 0;
+ return 0;
}
#endif
