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Support libunwind #2

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Support libunwind #2

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1 change: 1 addition & 0 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,7 @@ AC_CHECK_HEADERS_ONCE(m4_flatten([
grp.h
inttypes.h
libgen.h
libunwind.h
limits.h
memory.h
pthread.h
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4 changes: 4 additions & 0 deletions headers.h
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Expand Up @@ -41,6 +41,10 @@
#ifdef HAVE_LIBGEN_H
# include <libgen.h>
#endif
#if !defined(HAVE_EXECINFO_H) && defined(HAVE_LIBUNWIND_H)
#define UNW_LOCAL_ONLY
# include <libunwind.h>
#endif
#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
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13 changes: 13 additions & 0 deletions libsbutil/sb_efuncs.c
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Expand Up @@ -113,10 +113,23 @@ void sb_eraw(const char *format, ...)
void sb_dump_backtrace(void)
{
#ifdef HAVE_BACKTRACE
#if defined(HAVE_EXECINFO_H)
void *funcs[10];
int num_funcs;
num_funcs = backtrace(funcs, ARRAY_SIZE(funcs));
backtrace_symbols_fd(funcs, num_funcs, STDERR_FILENO);
#elif defined(HAVE_LIBUNWIND_H)
unw_cursor_t cursor; unw_context_t uc;
unw_word_t ip, sp;

unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
fprintf(STDERR_FILENO, "ip = %lx, sp = %lx\n", (long) ip, (long) sp);
}
#endif
#endif
__sb_dump_backtrace();
}
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