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Demangle and pretty-print symbols in internal backtraces. Patch by

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Wesley Peck, with a few fixes by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60605 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-12-05 20:12:48 +00:00
parent 64b535608e
commit 56d9b6dff3
1 changed files with 44 additions and 0 deletions
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44
lib/System/Unix/Signals.inc
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@ -25,6 +25,10 @@
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_DLFCN_H && __GNUG__
#include <dlfcn.h>
#include <cxxabi.h>
#endif
using namespace llvm;
namespace {
@ -69,8 +73,48 @@ static void PrintStackTrace() {
// Use backtrace() to output a backtrace on Linux systems with glibc.
int depth = backtrace(StackTrace,
static_cast<int>(array_lengthof(StackTrace)));
#if HAVE_DLFCN_H && __GNUG__
int width = 0;
for (int i = 0; i < depth; ++i) {
Dl_info dlinfo;
dladdr(StackTrace[i], &dlinfo);
char* name = strrchr(dlinfo.dli_fname, '/');
int nwidth;
if (name == NULL) nwidth = strlen(dlinfo.dli_fname);
else nwidth = strlen(name) - 1;
if (nwidth > width) width = nwidth;
}
for (int i = 0; i < depth; ++i) {
Dl_info dlinfo;
dladdr(StackTrace[i], &dlinfo);
fprintf(stderr, "%-3d", i);
char* name = strrchr(dlinfo.dli_fname, '/');
if (name == NULL) fprintf(stderr, " %-*s", width, dlinfo.dli_fname);
else fprintf(stderr, " %-*s", width, name+1);
fprintf(stderr, " %#0*x", (int)(sizeof(void*) * 2) + 2, StackTrace[i]);
if (dlinfo.dli_sname != NULL) {
int res;
fputc(' ', stderr);
char* d = abi::__cxa_demangle(dlinfo.dli_sname, NULL, NULL, &res);
if (d == NULL) fputs(dlinfo.dli_sname, stderr);
else fputs(d, stderr);
free(d);
fprintf(stderr, " + %tu",(char*)StackTrace[i]-(char*)dlinfo.dli_saddr);
}
fputc('\n', stderr);
}
#else
backtrace_symbols_fd(StackTrace, depth, STDERR_FILENO);
#endif
#endif
}
// SignalHandler - The signal handler that runs...