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/*
* win32_crashrpt.c : provides information after a crash
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
/* prevent "empty compilation unit" warning on e.g. UNIX */
typedef int win32_crashrpt__dummy;
#ifdef WIN32
#ifdef SVN_USE_WIN32_CRASHHANDLER
/*** Includes. ***/
#include <apr.h>
#include <dbghelp.h>
#include <direct.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "svn_version.h"
#include "win32_crashrpt.h"
#include "win32_crashrpt_dll.h"
/*** Global variables ***/
HANDLE dbghelp_dll = INVALID_HANDLE_VALUE;
/* Email address where the crash reports should be sent too. */
#define CRASHREPORT_EMAIL "users@subversion.apache.org"
#define DBGHELP_DLL "dbghelp.dll"
#define LOGFILE_PREFIX "svn-crash-log"
#if defined(_M_IX86)
#define FORMAT_PTR "0x%08x"
#elif defined(_M_X64)
#define FORMAT_PTR "0x%016I64x"
#endif
/*** Code. ***/
/* Convert a wide-character string to utf-8. This function will create a buffer
* large enough to hold the result string, the caller should free this buffer.
* If the string can't be converted, NULL is returned.
*/
static char *
convert_wbcs_to_utf8(const wchar_t *str)
{
size_t len = wcslen(str);
char *utf8_str = malloc(sizeof(wchar_t) * len + 1);
len = wcstombs(utf8_str, str, len);
if (len == -1)
return NULL;
utf8_str[len] = '\0';
return utf8_str;
}
/* Convert the exception code to a string */
static const char *
exception_string(int exception)
{
#define EXCEPTION(x) case EXCEPTION_##x: return (#x);
switch (exception)
{
EXCEPTION(ACCESS_VIOLATION)
EXCEPTION(DATATYPE_MISALIGNMENT)
EXCEPTION(BREAKPOINT)
EXCEPTION(SINGLE_STEP)
EXCEPTION(ARRAY_BOUNDS_EXCEEDED)
EXCEPTION(FLT_DENORMAL_OPERAND)
EXCEPTION(FLT_DIVIDE_BY_ZERO)
EXCEPTION(FLT_INEXACT_RESULT)
EXCEPTION(FLT_INVALID_OPERATION)
EXCEPTION(FLT_OVERFLOW)
EXCEPTION(FLT_STACK_CHECK)
EXCEPTION(FLT_UNDERFLOW)
EXCEPTION(INT_DIVIDE_BY_ZERO)
EXCEPTION(INT_OVERFLOW)
EXCEPTION(PRIV_INSTRUCTION)
EXCEPTION(IN_PAGE_ERROR)
EXCEPTION(ILLEGAL_INSTRUCTION)
EXCEPTION(NONCONTINUABLE_EXCEPTION)
EXCEPTION(STACK_OVERFLOW)
EXCEPTION(INVALID_DISPOSITION)
EXCEPTION(GUARD_PAGE)
EXCEPTION(INVALID_HANDLE)
default:
return "UNKNOWN_ERROR";
}
#undef EXCEPTION
}
/* Write the minidump to file. The callback function will at the same time
write the list of modules to the log file. */
static BOOL
write_minidump_file(const char *file, PEXCEPTION_POINTERS ptrs,
MINIDUMP_CALLBACK_ROUTINE module_callback,
void *data)
{
/* open minidump file */
HANDLE minidump_file = CreateFile(file, GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (minidump_file != INVALID_HANDLE_VALUE)
{
MINIDUMP_EXCEPTION_INFORMATION expt_info;
MINIDUMP_CALLBACK_INFORMATION dump_cb_info;
expt_info.ThreadId = GetCurrentThreadId();
expt_info.ExceptionPointers = ptrs;
expt_info.ClientPointers = FALSE;
dump_cb_info.CallbackRoutine = module_callback;
dump_cb_info.CallbackParam = data;
MiniDumpWriteDump_(GetCurrentProcess(),
GetCurrentProcessId(),
minidump_file,
MiniDumpNormal,
ptrs ? &expt_info : NULL,
NULL,
&dump_cb_info);
CloseHandle(minidump_file);
return TRUE;
}
return FALSE;
}
/* Write module information to the log file */
static BOOL CALLBACK
write_module_info_callback(void *data,
CONST PMINIDUMP_CALLBACK_INPUT callback_input,
PMINIDUMP_CALLBACK_OUTPUT callback_output)
{
if (data != NULL &&
callback_input != NULL &&
callback_input->CallbackType == ModuleCallback)
{
FILE *log_file = (FILE *)data;
MINIDUMP_MODULE_CALLBACK module = callback_input->Module;
char *buf = convert_wbcs_to_utf8(module.FullPath);
fprintf(log_file, FORMAT_PTR, module.BaseOfImage);
fprintf(log_file, " %s", buf);
free(buf);
fprintf(log_file, " (%d.%d.%d.%d, %d bytes)\n",
HIWORD(module.VersionInfo.dwFileVersionMS),
LOWORD(module.VersionInfo.dwFileVersionMS),
HIWORD(module.VersionInfo.dwFileVersionLS),
LOWORD(module.VersionInfo.dwFileVersionLS),
module.SizeOfImage);
}
return TRUE;
}
/* Write details about the current process, platform and the exception */
static void
write_process_info(EXCEPTION_RECORD *exception, CONTEXT *context,
FILE *log_file)
{
OSVERSIONINFO oi;
const char *cmd_line;
char workingdir[8192];
/* write the command line */
cmd_line = GetCommandLine();
fprintf(log_file,
"Cmd line: %s\n", cmd_line);
_getcwd(workingdir, sizeof(workingdir));
fprintf(log_file,
"Working Dir: %s\n", workingdir);
/* write the svn version number info. */
fprintf(log_file,
"Version: %s, compiled %s, %s\n",
SVN_VERSION, __DATE__, __TIME__);
/* write information about the OS */
oi.dwOSVersionInfoSize = sizeof(oi);
GetVersionEx(&oi);
fprintf(log_file,
"Platform: Windows OS version %d.%d build %d %s\n\n",
oi.dwMajorVersion, oi.dwMinorVersion, oi.dwBuildNumber,
oi.szCSDVersion);
/* write the exception code */
fprintf(log_file,
"Exception: %s\n\n",
exception_string(exception->ExceptionCode));
/* write the register info. */
fprintf(log_file,
"Registers:\n");
#if defined(_M_IX86)
fprintf(log_file,
"eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
context->Eax, context->Ebx, context->Ecx,
context->Edx, context->Esi, context->Edi);
fprintf(log_file,
"eip=%08x esp=%08x ebp=%08x efl=%08x\n",
context->Eip, context->Esp,
context->Ebp, context->EFlags);
fprintf(log_file,
"cs=%04x ss=%04x ds=%04x es=%04x fs=%04x gs=%04x\n",
context->SegCs, context->SegSs, context->SegDs,
context->SegEs, context->SegFs, context->SegGs);
#elif defined(_M_X64)
fprintf(log_file,
"Rax=%016I64x Rcx=%016I64x Rdx=%016I64x Rbx=%016I64x\n",
context->Rax, context->Rcx, context->Rdx, context->Rbx);
fprintf(log_file,
"Rsp=%016I64x Rbp=%016I64x Rsi=%016I64x Rdi=%016I64x\n",
context->Rsp, context->Rbp, context->Rsi, context->Rdi);
fprintf(log_file,
"R8= %016I64x R9= %016I64x R10= %016I64x R11=%016I64x\n",
context->R8, context->R9, context->R10, context->R11);
fprintf(log_file,
"R12=%016I64x R13=%016I64x R14=%016I64x R15=%016I64x\n",
context->R12, context->R13, context->R14, context->R15);
fprintf(log_file,
"cs=%04x ss=%04x ds=%04x es=%04x fs=%04x gs=%04x ss=%04x\n",
context->SegCs, context->SegDs, context->SegEs,
context->SegFs, context->SegGs, context->SegSs);
#else
#error Unknown processortype, please disable SVN_USE_WIN32_CRASHHANDLER
#endif
}
/* Formats the value at address based on the specified basic type
* (char, int, long ...). */
static void
format_basic_type(char *buf, DWORD basic_type, DWORD64 length, void *address)
{
switch(length)
{
case 1:
sprintf(buf, "0x%02x", (int)*(unsigned char *)address);
break;
case 2:
sprintf(buf, "0x%04x", (int)*(unsigned short *)address);
break;
case 4:
switch(basic_type)
{
case 2: /* btChar */
{
if (!IsBadStringPtr(*(PSTR*)address, 32))
sprintf(buf, "\"%.31s\"", *(const char **)address);
else
sprintf(buf, FORMAT_PTR, *(DWORD_PTR *)address);
}
case 6: /* btInt */
sprintf(buf, "%d", *(int *)address);
break;
case 8: /* btFloat */
sprintf(buf, "%f", *(float *)address);
break;
default:
sprintf(buf, FORMAT_PTR, *(DWORD_PTR *)address);
break;
}
break;
case 8:
if (basic_type == 8) /* btFloat */
sprintf(buf, "%lf", *(double *)address);
else
sprintf(buf, "0x%016I64X", *(unsigned __int64 *)address);
break;
default:
sprintf(buf, "[unhandled type 0x%08x of length " FORMAT_PTR "]",
basic_type, length);
break;
}
}
/* Formats the value at address based on the type (pointer, user defined,
* basic type). */
static void
format_value(char *value_str, DWORD64 mod_base, DWORD type, void *value_addr)
{
DWORD tag = 0;
int ptr = 0;
HANDLE proc = GetCurrentProcess();
while (SymGetTypeInfo_(proc, mod_base, type, TI_GET_SYMTAG, &tag))
{
/* SymTagPointerType */
if (tag == 14)
{
ptr++;
SymGetTypeInfo_(proc, mod_base, type, TI_GET_TYPE, &type);
continue;
}
break;
}
switch(tag)
{
case 11: /* SymTagUDT */
{
WCHAR *type_name_wbcs;
if (SymGetTypeInfo_(proc, mod_base, type, TI_GET_SYMNAME,
&type_name_wbcs))
{
char *type_name = convert_wbcs_to_utf8(type_name_wbcs);
LocalFree(type_name_wbcs);
if (ptr == 0)
sprintf(value_str, "(%s) " FORMAT_PTR,
type_name, (DWORD_PTR *)value_addr);
else if (ptr == 1)
sprintf(value_str, "(%s *) " FORMAT_PTR,
type_name, *(DWORD_PTR *)value_addr);
else
sprintf(value_str, "(%s **) " FORMAT_PTR,
type_name, *(DWORD_PTR *)value_addr);
free(type_name);
}
else
sprintf(value_str, "[no symbol tag]");
}
break;
case 16: /* SymTagBaseType */
{
DWORD bt;
ULONG64 length;
SymGetTypeInfo_(proc, mod_base, type, TI_GET_LENGTH, &length);
/* print a char * as a string */
if (ptr == 1 && length == 1)
{
sprintf(value_str, FORMAT_PTR " \"%s\"",
*(DWORD_PTR *)value_addr, *(const char **)value_addr);
}
else if (ptr >= 1)
{
sprintf(value_str, FORMAT_PTR, *(DWORD_PTR *)value_addr);
}
else if (SymGetTypeInfo_(proc, mod_base, type, TI_GET_BASETYPE, &bt))
{
format_basic_type(value_str, bt, length, value_addr);
}
}
break;
case 12: /* SymTagEnum */
sprintf(value_str, "%d", *(DWORD_PTR *)value_addr);
break;
case 13: /* SymTagFunctionType */
sprintf(value_str, FORMAT_PTR, *(DWORD_PTR *)value_addr);
break;
default:
sprintf(value_str, "[unhandled tag: %d]", tag);
break;
}
}
/* Internal structure used to pass some data to the enumerate symbols
* callback */
typedef struct symbols_baton_t {
STACKFRAME64 *stack_frame;
FILE *log_file;
int nr_of_frame;
BOOL log_params;
} symbols_baton_t;
/* Write the details of one parameter or local variable to the log file */
static BOOL WINAPI
write_var_values(PSYMBOL_INFO sym_info, ULONG sym_size, void *baton)
{
static int last_nr_of_frame = 0;
DWORD_PTR var_data = 0; /* Will point to the variable's data in memory */
STACKFRAME64 *stack_frame = ((symbols_baton_t*)baton)->stack_frame;
FILE *log_file = ((symbols_baton_t*)baton)->log_file;
int nr_of_frame = ((symbols_baton_t*)baton)->nr_of_frame;
BOOL log_params = ((symbols_baton_t*)baton)->log_params;
char value_str[256] = "";
/* get the variable's data */
if (sym_info->Flags & SYMFLAG_REGREL)
{
var_data = (DWORD_PTR)stack_frame->AddrFrame.Offset;
var_data += (DWORD_PTR)sym_info->Address;
}
else
return FALSE;
if (log_params && sym_info->Flags & SYMFLAG_PARAMETER)
{
if (last_nr_of_frame == nr_of_frame)
fprintf(log_file, ", ", 2);
else
last_nr_of_frame = nr_of_frame;
format_value(value_str, sym_info->ModBase, sym_info->TypeIndex,
(void *)var_data);
fprintf(log_file, "%.*s=%s", (int)sym_info->NameLen, sym_info->Name,
value_str);
}
if (!log_params && sym_info->Flags & SYMFLAG_LOCAL)
{
format_value(value_str, sym_info->ModBase, sym_info->TypeIndex,
(void *)var_data);
fprintf(log_file, " %.*s = %s\n", (int)sym_info->NameLen,
sym_info->Name, value_str);
}
return TRUE;
}
/* Write the details of one function to the log file */
static void
write_function_detail(STACKFRAME64 stack_frame, int nr_of_frame, FILE *log_file)
{
ULONG64 symbolBuffer[(sizeof(SYMBOL_INFO) +
MAX_SYM_NAME +
sizeof(ULONG64) - 1) /
sizeof(ULONG64)];
PSYMBOL_INFO pIHS = (PSYMBOL_INFO)symbolBuffer;
DWORD64 func_disp=0;
IMAGEHLP_STACK_FRAME ih_stack_frame;
IMAGEHLP_LINE64 ih_line;
DWORD line_disp=0;
HANDLE proc = GetCurrentProcess();
symbols_baton_t ensym;
nr_of_frame++; /* We need a 1 based index here */
/* log the function name */
pIHS->SizeOfStruct = sizeof(SYMBOL_INFO);
pIHS->MaxNameLen = MAX_SYM_NAME;
if (SymFromAddr_(proc, stack_frame.AddrPC.Offset, &func_disp, pIHS))
{
fprintf(log_file,
"#%d 0x%08I64x in %.*s(",
nr_of_frame, stack_frame.AddrPC.Offset,
pIHS->NameLen > 200 ? 200 : (int)pIHS->NameLen,
pIHS->Name);
/* restrict symbol enumeration to this frame only */
ih_stack_frame.InstructionOffset = stack_frame.AddrPC.Offset;
SymSetContext_(proc, &ih_stack_frame, 0);
ensym.log_file = log_file;
ensym.stack_frame = &stack_frame;
ensym.nr_of_frame = nr_of_frame;
/* log all function parameters */
ensym.log_params = TRUE;
SymEnumSymbols_(proc, 0, 0, write_var_values, &ensym);
fprintf(log_file, ")");
}
else
{
fprintf(log_file,
"#%d 0x%08I64x in (unknown function)",
nr_of_frame, stack_frame.AddrPC.Offset);
}
/* find the source line for this function. */
ih_line.SizeOfStruct = sizeof(IMAGEHLP_LINE);
if (SymGetLineFromAddr64_(proc, stack_frame.AddrPC.Offset,
&line_disp, &ih_line) != 0)
{
fprintf(log_file,
" at %s:%d\n", ih_line.FileName, ih_line.LineNumber);
}
else
{
fprintf(log_file, "\n");
}
/* log all function local variables */
ensym.log_params = FALSE;
SymEnumSymbols_(proc, 0, 0, write_var_values, &ensym);
}
/* Walk over the stack and log all relevant information to the log file */
static void
write_stacktrace(CONTEXT *context, FILE *log_file)
{
#if defined (_M_IX86) || defined(_M_X64) || defined(_M_IA64)
HANDLE proc = GetCurrentProcess();
STACKFRAME64 stack_frame;
DWORD machine;
CONTEXT ctx;
int skip = 0, i = 0;
/* The thread information - if not supplied. */
if (context == NULL)
{
/* If no context is supplied, skip 1 frame */
skip = 1;
ctx.ContextFlags = CONTEXT_FULL;
if (!GetThreadContext(GetCurrentThread(), &ctx))
return;
}
else
{
ctx = *context;
}
if (context == NULL)
return;
/* Write the stack trace */
ZeroMemory(&stack_frame, sizeof(STACKFRAME64));
stack_frame.AddrPC.Mode = AddrModeFlat;
stack_frame.AddrStack.Mode = AddrModeFlat;
stack_frame.AddrFrame.Mode = AddrModeFlat;
#if defined(_M_IX86)
machine = IMAGE_FILE_MACHINE_I386;
stack_frame.AddrPC.Offset = context->Eip;
stack_frame.AddrStack.Offset = context->Esp;
stack_frame.AddrFrame.Offset = context->Ebp;
#elif defined(_M_X64)
machine = IMAGE_FILE_MACHINE_AMD64;
stack_frame.AddrPC.Offset = context->Rip;
stack_frame.AddrStack.Offset = context->Rsp;
stack_frame.AddrFrame.Offset = context->Rbp;
#elif defined(_M_IA64)
machine = IMAGE_FILE_MACHINE_IA64;
stack_frame.AddrPC.Offset = context->StIIP;
stack_frame.AddrStack.Offset = context->SP;
stack_frame.AddrBStore.Mode = AddrModeFlat;
stack_frame.AddrBStore.Offset = context->RsBSP;
#else
#error Unknown processortype, please disable SVN_USE_WIN32_CRASHHANDLER
#endif
while (1)
{
if (! StackWalk64_(machine, proc, GetCurrentThread(),
&stack_frame, &ctx, NULL,
SymFunctionTableAccess64_, SymGetModuleBase64_, NULL))
{
break;
}
if (i >= skip)
{
/* Try to include symbolic information.
Also check that the address is not zero. Sometimes StackWalk
returns TRUE with a frame of zero. */
if (stack_frame.AddrPC.Offset != 0)
{
write_function_detail(stack_frame, i, log_file);
}
}
i++;
}
#else
#error Unknown processortype, please disable SVN_USE_WIN32_CRASHHANDLER
#endif
}
/* Check if a debugger is attached to this process */
static BOOL
is_debugger_present()
{
HANDLE kernel32_dll = LoadLibrary("kernel32.dll");
BOOL result;
ISDEBUGGERPRESENT IsDebuggerPresent_ =
(ISDEBUGGERPRESENT)GetProcAddress(kernel32_dll, "IsDebuggerPresent");
if (IsDebuggerPresent_ && IsDebuggerPresent_())
result = TRUE;
else
result = FALSE;
FreeLibrary(kernel32_dll);
return result;
}
/* Load the dbghelp.dll file, try to find a version that matches our
requirements. */
static BOOL
load_dbghelp_dll()
{
dbghelp_dll = LoadLibrary(DBGHELP_DLL);
if (dbghelp_dll != INVALID_HANDLE_VALUE)
{
DWORD opts;
/* load the functions */
MiniDumpWriteDump_ =
(MINIDUMPWRITEDUMP)GetProcAddress(dbghelp_dll, "MiniDumpWriteDump");
SymInitialize_ =
(SYMINITIALIZE)GetProcAddress(dbghelp_dll, "SymInitialize");
SymSetOptions_ =
(SYMSETOPTIONS)GetProcAddress(dbghelp_dll, "SymSetOptions");
SymGetOptions_ =
(SYMGETOPTIONS)GetProcAddress(dbghelp_dll, "SymGetOptions");
SymCleanup_ =
(SYMCLEANUP)GetProcAddress(dbghelp_dll, "SymCleanup");
SymGetTypeInfo_ =
(SYMGETTYPEINFO)GetProcAddress(dbghelp_dll, "SymGetTypeInfo");
SymGetLineFromAddr64_ =
(SYMGETLINEFROMADDR64)GetProcAddress(dbghelp_dll,
"SymGetLineFromAddr64");
SymEnumSymbols_ =
(SYMENUMSYMBOLS)GetProcAddress(dbghelp_dll, "SymEnumSymbols");
SymSetContext_ =
(SYMSETCONTEXT)GetProcAddress(dbghelp_dll, "SymSetContext");
SymFromAddr_ = (SYMFROMADDR)GetProcAddress(dbghelp_dll, "SymFromAddr");
StackWalk64_ = (STACKWALK64)GetProcAddress(dbghelp_dll, "StackWalk64");
SymFunctionTableAccess64_ =
(SYMFUNCTIONTABLEACCESS64)GetProcAddress(dbghelp_dll,
"SymFunctionTableAccess64");
SymGetModuleBase64_ =
(SYMGETMODULEBASE64)GetProcAddress(dbghelp_dll, "SymGetModuleBase64");
if (! (MiniDumpWriteDump_ &&
SymInitialize_ && SymSetOptions_ && SymGetOptions_ &&
SymCleanup_ && SymGetTypeInfo_ && SymGetLineFromAddr64_ &&
SymEnumSymbols_ && SymSetContext_ && SymFromAddr_ &&
SymGetModuleBase64_ && StackWalk64_ &&
SymFunctionTableAccess64_))
goto cleanup;
/* initialize the symbol loading code */
opts = SymGetOptions_();
/* Set the 'load lines' option to retrieve line number information;
set the Deferred Loads option to map the debug info in memory only
when needed. */
SymSetOptions_(opts | SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS);
/* Initialize the debughlp DLL with the default path and automatic
module enumeration (and loading of symbol tables) for this process.
*/
SymInitialize_(GetCurrentProcess(), NULL, TRUE);
return TRUE;
}
cleanup:
if (dbghelp_dll)
FreeLibrary(dbghelp_dll);
return FALSE;
}
/* Cleanup the dbghelp.dll library */
static void
cleanup_debughlp()
{
SymCleanup_(GetCurrentProcess());
FreeLibrary(dbghelp_dll);
}
/* Create a filename based on a prefix, the timestamp and an extension.
check if the filename was already taken, retry 3 times. */
BOOL
get_temp_filename(char *filename, const char *prefix, const char *ext)
{
char temp_dir[MAX_PATH - 64];
int i;
if (! GetTempPath(MAX_PATH - 64, temp_dir))
return FALSE;
for (i = 0;i < 3;i++)
{
HANDLE file;
time_t now;
char time_str[64];
time(&now);
strftime(time_str, 64, "%Y%m%d%H%M%S", localtime(&now));
sprintf(filename, "%s%s%s.%s", temp_dir, prefix, time_str, ext);
file = CreateFile(filename, GENERIC_WRITE, 0, NULL, CREATE_NEW,
FILE_ATTRIBUTE_NORMAL, NULL);
if (file != INVALID_HANDLE_VALUE)
{
CloseHandle(file);
return TRUE;
}
}
filename[0] = '\0';
return FALSE;
}
/* Unhandled exception callback set with SetUnhandledExceptionFilter() */
LONG WINAPI
svn__unhandled_exception_filter(PEXCEPTION_POINTERS ptrs)
{
char dmp_filename[MAX_PATH];
char log_filename[MAX_PATH];
FILE *log_file;
/* Check if the crash handler was already loaded (crash while handling the
crash) */
if (dbghelp_dll != INVALID_HANDLE_VALUE)
return EXCEPTION_CONTINUE_SEARCH;
/* don't log anything if we're running inside a debugger ... */
if (is_debugger_present())
return EXCEPTION_CONTINUE_SEARCH;
/* ... or if we can't create the log files ... */
if (!get_temp_filename(dmp_filename, LOGFILE_PREFIX, "dmp") ||
!get_temp_filename(log_filename, LOGFILE_PREFIX, "log"))
return EXCEPTION_CONTINUE_SEARCH;
/* If we can't load a recent version of the dbghelp.dll, pass on this
exception */
if (!load_dbghelp_dll())
return EXCEPTION_CONTINUE_SEARCH;
/* open log file */
log_file = fopen(log_filename, "w+");
/* write information about the process */
fprintf(log_file, "\nProcess info:\n");
write_process_info(ptrs ? ptrs->ExceptionRecord : NULL,
ptrs ? ptrs->ContextRecord : NULL,
log_file);
/* write the stacktrace, if available */
fprintf(log_file, "\nStacktrace:\n");
write_stacktrace(ptrs ? ptrs->ContextRecord : NULL, log_file);
/* write the minidump file and use the callback to write the list of modules
to the log file */
fprintf(log_file, "\n\nLoaded modules:\n");
write_minidump_file(dmp_filename, ptrs,
write_module_info_callback, (void *)log_file);
fclose(log_file);
/* inform the user */
fprintf(stderr, "This application has halted due to an unexpected error.\n"
"A crash report and minidump file were saved to disk, you"
" can find them here:\n"
"%s\n%s\n"
"Please send the log file to %s to help us analyze\nand "
"solve this problem.\n\n"
"NOTE: The crash report and minidump files can contain some"
" sensitive information\n(filenames, partial file content, "
"usernames and passwords etc.)\n",
log_filename,
dmp_filename,
CRASHREPORT_EMAIL);
if (getenv("SVN_DBG_STACKTRACES_TO_STDERR") != NULL)
{
fprintf(stderr, "\nProcess info:\n");
write_process_info(ptrs ? ptrs->ExceptionRecord : NULL,
ptrs ? ptrs->ContextRecord : NULL,
stderr);
fprintf(stderr, "\nStacktrace:\n");
write_stacktrace(ptrs ? ptrs->ContextRecord : NULL, stderr);
}
fflush(stderr);
fflush(stdout);
cleanup_debughlp();
/* terminate the application */
return EXCEPTION_EXECUTE_HANDLER;
}
#endif /* SVN_USE_WIN32_CRASHHANDLER */
#endif /* WIN32 */
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