exctrace_collector.cxx File Reference

Generate stack trace backs from a caught exception — collector module. More...

#include <dlfcn.h>
#include <execinfo.h>
#include <cstdio>
#include <typeinfo>
#include <utility>
#include <algorithm>
#include <exception>
#include "CxxUtils/checker_macros.h"

Include dependency graph for exctrace_collector.cxx:

Go to the source code of this file.

Classes
struct	CxxUtils::extrace_init

Namespaces
namespace	CxxUtils

Typedefs
typedef void	throwfn(void *, void *, void(*dest) (void *))

Functions
void	extrace_force_libstd_link ()
int	exctrace_get_last_trace (int max_depth, void *trace[])
void	__cxa_throw (void *thrown_exception, void *tinfo, void(*dest)(void *))

Variables
static const int	bt_depth = 100
static thread_local int	exctrace_last_depth = 0
static thread_local void *	exctrace_last_trace [bt_depth]
static throwfn *	old_throw
static extrace_init	CxxUtils::initer

Detailed Description

Generate stack trace backs from a caught exception — collector module.

Author

scott snyder snyde.nosp@m.r@bn.nosp@m.l.gov

Date

Oct, 2009

When preloaded, this module hooks into the __cxa_throw function used by the abi to throw exceptions so that it records stack back traces in static variables. These can later be accessed with CxxUtils::exctrace.

Definition in file exctrace_collector.cxx.

Typedef Documentation

throwfn

typedef void throwfn(void *, void *, void(*dest)(void *))

Definition at line 36 of file exctrace_collector.cxx.

Function Documentation

__cxa_throw()

void __cxa_throw	(	void *	thrown_exception,
		void *	tinfo,
		void(*	dest )(void *) )

Definition at line 63 of file exctrace_collector.cxx.

{
  exctrace_last_depth = backtrace (exctrace_last_trace, bt_depth);
  old_throw (thrown_exception, tinfo, dest);
  // not reached
  std::abort();
}

exctrace_get_last_trace()

int exctrace_get_last_trace	(	int	max_depth,
		void *	trace[] )

Definition at line 52 of file exctrace_collector.cxx.

  {
    int ncopy = std::min (exctrace_last_depth, max_depth);
    std::copy (exctrace_last_trace, exctrace_last_trace+ncopy, trace);
    return ncopy;
  }

extrace_force_libstd_link()

void extrace_force_libstd_link

(

)

Definition at line 43 of file exctrace_collector.cxx.

{
  std::terminate();
}

Variable Documentation

bt_depth

const int bt_depth = 100

static

Definition at line 29 of file exctrace_collector.cxx.

exctrace_last_depth

thread_local int exctrace_last_depth = 0

static

Definition at line 32 of file exctrace_collector.cxx.

exctrace_last_trace

thread_local void* exctrace_last_trace[bt_depth]

static

Definition at line 33 of file exctrace_collector.cxx.

old_throw

throwfn* old_throw

static

Definition at line 37 of file exctrace_collector.cxx.