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support backtraces on windows

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This commit is contained in:
Arvid Norberg
2012-01-26 10:33:39 +00:00
parent 6e9ef9edab
commit f13a91d8a8
4 changed files with 93 additions and 19 deletions
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78
src/assert.cpp
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@@ -85,6 +85,21 @@ std::string demangle(char const* name)
free(unmangled);
return ret;
}
#elif defined WIN32
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501 // XP
#include "windows.h"
#include "dbghelp.h"
std::string demangle(char const* name)
{
char demangled_name[256];
if (UnDecorateSymbolName(name, demangled_name, sizeof(demangled_name), UNDNAME_NO_THROW_SIGNATURES) == 0)
demangled_name[0] = 0;
return demangled_name;
}
#else
std::string demangle(char const* name) { return name; }
@@ -114,6 +129,69 @@ void print_backtrace(char* out, int len)
free(symbols);
}
#elif defined WIN32
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501 // XP
#include "windows.h"
#include "libtorrent/utf8.hpp"
#include "winbase.h"
#include "dbghelp.h"
void print_backtrace(char* out, int len)
{
typedef USHORT (*RtlCaptureStackBackTrace_t)(
__in ULONG FramesToSkip,
__in ULONG FramesToCapture,
__out PVOID *BackTrace,
__out_opt PULONG BackTraceHash);
static RtlCaptureStackBackTrace_t RtlCaptureStackBackTrace = 0;
if (RtlCaptureStackBackTrace == 0)
{
// we don't actually have to free this library, everyone has it loaded
HMODULE lib = LoadLibrary(TEXT("kernel32.dll"));
RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_t)GetProcAddress(lib, "RtlCaptureStackBackTrace");
if (RtlCaptureStackBackTrace == 0)
{
out[0] = 0;
return;
}
}
int i;
void* stack[50];
int size = CaptureStackBackTrace(0, 50, stack, 0);
SYMBOL_INFO* symbol = (SYMBOL_INFO*)calloc(sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(TCHAR), 1);
symbol->MaxNameLen = MAX_SYM_NAME;
symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
HANDLE p = GetCurrentProcess();
static bool sym_initialized = false;
if (!sym_initialized)
{
sym_initialized = true;
SymInitialize(p, NULL, true);
}
for (i = 0; i < size && len > 0; ++i)
{
int ret;
if (SymFromAddr(p, uintptr_t(stack[i]), 0, symbol))
ret = snprintf(out, len, "%d: %s\n", i, symbol->Name);
else
ret = snprintf(out, len, "%d: <unknown>\n", i);
out += ret;
len -= ret;
}
free(symbol);
}
#else
void print_backtrace(char* out, int len) {}