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simplified assert.cpp, included stack-traces on Mac (assumes 10.5). Makes it easier to debug asio hangs since the backtraces can be used externally

This commit is contained in:
Arvid Norberg 2008-12-19 06:12:55 +00:00
parent 2aae46ec3b
commit eadd91849a
1 changed files with 49 additions and 18 deletions
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67
src/assert.cpp
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@ -30,6 +30,8 @@ POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef TORRENT_DEBUG
#ifdef __GNUC__
#include <cxxabi.h>
@ -40,10 +42,27 @@ POSSIBILITY OF SUCH DAMAGE.
std::string demangle(char const* name)
{
// in case this string comes
// this is needed on linux
char const* start = strchr(name, '(');
if (start != 0) ++start;
else start = name;
if (start != 0)
{
++start;
}
else
{
// this is needed on macos x
start = strstr(name, "0x");
if (start != 0)
{
start = strchr(start, ' ');
if (start != 0) ++start;
else start = name;
}
else start = name;
}
char const* end = strchr(start, '+');
if (end) while (*(end-1) == ' ') --end;
std::string in;
if (end == 0) in.assign(start);
@ -60,13 +79,36 @@ std::string demangle(char const* name)
#endif
#ifdef TORRENT_DEBUG
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#if defined __linux__ && defined __GNUC__
// execinfo.h is available in the MacOS X 10.5 SDK. I
// don't know of a define to distiguish between SDKs, so
// for now, all Mac builds are assumed to be using 10.5
// for debug builds. If this fails for you, just remove
// the __APPLE__ check
#if (defined __linux__ || defined __APPLE__)
#include <execinfo.h>
void print_backtrace(char const* label)
{
void* stack[50];
int size = backtrace(stack, 50);
char** symbols = backtrace_symbols(stack, size);
fprintf(stderr, "%s\n", label);
for (int i = 1; i < size; ++i)
{
fprintf(stderr, "%d: %s\n", i, demangle(symbols[i]).c_str());
}
free(symbols);
}
#else
void print_backtrace(char const* label) {}
#endif
void assert_fail(char const* expr, int line, char const* file, char const* function)
@ -78,21 +120,10 @@ void assert_fail(char const* expr, int line, char const* file, char const* funct
"file: '%s'\n"
"line: %d\n"
"function: %s\n"
"expression: %s\n"
"stack:\n", file, line, function, expr);
"expression: %s\n", file, line, function, expr);
#if defined __linux__ && defined __GNUC__
void* stack[50];
int size = backtrace(stack, 50);
char** symbols = backtrace_symbols(stack, size);
print_backtrace("stack:");
for (int i = 0; i < size; ++i)
{
fprintf(stderr, "%d: %s\n", i, demangle(symbols[i]).c_str());
}
free(symbols);
#endif
// send SIGINT to the current process
// to break into the debugger
raise(SIGINT);