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#include "Exceptions.h"
#define MAXTRACE 128
#ifdef _WIN32
#include <windows.h>
#include <dbghelp.h>
void Balau::GeneralException::genTrace() {
// taken from http://stackoverflow.com/questions/5693192/win32-backtrace-from-c-code
unsigned int i;
void * stack[MAXTRACE];
unsigned short frames;
SYMBOL_INFO * symbol;
HANDLE process;
process = GetCurrentProcess();
SymInitialize(process, NULL, TRUE);
frames = CaptureStackBackTrace(0, MAXTRACE, stack, NULL);
symbol = (SYMBOL_INFO *) calloc(sizeof(SYMBOL_INFO) + 256 * sizeof(char), 1);
symbol->MaxNameLen = 255;
symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
for (i = 0; i < frames; i++) {
SymFromAddr(process, (DWORD64)(stack[i]), 0, symbol);
int status = 0;
String line;
#ifndef _MSC_VER
char * demangled = abi::__cxa_demangle(symbol->Name, 0, 0, &status);
#else
char * demangled = NULL;
#endif
line.set("%i: 0x%08x (%s)", i, symbol->Address, status == 0 && demangled ? demangled : symbol->Name);
if (demangled)
free(demangled);
m_trace.push_back(line);
}
free(symbol);
}
#else
#include <execinfo.h>
#include <dlfcn.h>
void Balau::GeneralException::genTrace() {
void * trace[MAXTRACE];
int n = backtrace(trace, MAXTRACE);
char ** symbols = backtrace_symbols(trace, MAXTRACE);
if (!symbols)
return;
String line;
for (int i = 0; i < n; i++)
line += String().set("%08zx ", (uintptr_t) trace[i]);
m_trace.push_back(line);
Dl_info info;
for (int i = 0; i < n; i++) {
int status;
String line;
dladdr(trace[i], &info);
long dist = ((char *) trace[i]) - ((char *) info.dli_saddr);
char * demangled;
if (info.dli_sname) {
demangled = abi::__cxa_demangle(info.dli_sname, 0, 0, &status);
} else {
demangled = NULL;
}
line.set("%i: %s(%s%c0x%lx) [0x%08zx]", i, info.dli_fname, info.dli_sname ? (demangled ? (status == 0 ? demangled : info.dli_sname) : info.dli_sname) : "??", dist < 0 ? '-' : '+', dist < 0 ? -dist : dist, (uintptr_t) trace[i]);
m_trace.push_back(line);
if (demangled)
free(demangled);
}
free(symbols);
}
#endif
static void ExitHelperInner(const Balau::String & msg, const char * details) throw (Balau::RessourceException) {
throw Balau::RessourceException(msg, details);
}
void Balau::ExitHelper(const String & msg, const char * fmt, ...) {
if (fmt) {
String details;
va_list ap;
va_start(ap, fmt);
details.set(fmt, ap);
va_end(ap);
ExitHelperInner(msg, details.to_charp());
} else {
ExitHelperInner(msg, NULL);
}
}
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