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Code Issues Releases Wiki Activity

Improve debugging traces

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This commit is contained in:
Nicolas Viennot 2019-11-06 16:43:24 -05:00
parent 975ba3323b
commit 6a951aa9f7
4 changed files with 42 additions and 8 deletions
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2
configure.ac
View File

@ -100,6 +100,7 @@ AC_CHECK_HEADERS(
inttypes.h \
libutil.h \
ncurses.h \
execinfo.h \
ndir.h \
paths.h \
pty.h \
@ -121,6 +122,7 @@ AC_CHECK_FUNCS(
[ \
dirfd \
flock \
backtrace \
setproctitle \
sysconf \
cfmakeraw \

36
tmate-debug.c
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@ -1,9 +1,20 @@
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <regex.h>
#include <signal.h>
#include "tmate.h"
#ifndef HAVE_BACKTRACE
void tmate_print_stack_trace(void) {}
void tmate_catch_sigsegv(void) {}
void tmate_preload_trace_lib(void) {}
#else
#if DEBUG
static int print_resolved_stack_frame(const char *frame)
@ -47,7 +58,7 @@ static int print_resolved_stack_frame(const char *frame)
return -1;
line[strlen(line)-1] = 0; /* remove \n */
tmate_crit("%s(%s) [%s]", file, line, address);
tmate_debug("%s(%s) [%s]", file, line, address);
return 0;
}
#endif
@ -62,20 +73,39 @@ void tmate_print_stack_trace(void)
size = backtrace (array, 20);
strings = backtrace_symbols (array, size);
tmate_crit("============ %zd stack frames ============", size);
tmate_info ("============ %zd stack frames ============", size);
for (i = 1; i < size; i++) {
#if DEBUG
if (print_resolved_stack_frame(strings[i]) < 0)
#endif
tmate_crit("%s", strings[i]);
tmate_info("%s", strings[i]);
}
free (strings);
}
static void handle_crash(__unused int sig)
{
/*
* XXX we are in a signal handler, we are not allowed to use malloc
* and friends, which is what we do
*/
tmate_info("CRASH, printing stack trace");
tmate_print_stack_trace();
tmate_fatal("CRASHED");
}
void tmate_catch_sigsegv(void)
{
signal(SIGSEGV, handle_crash);
signal(SIGABRT, handle_crash);
}
void tmate_preload_trace_lib(void)
{
void *array[1];
backtrace(array, 1);
}
#endif

1
tmate-main.c
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@ -213,6 +213,7 @@ int main(int argc, char **argv, char **envp)
cmdline_end = *envp;
tmate_preload_trace_lib();
tmate_catch_sigsegv();
if ((dev_urandom_fd = open("/dev/urandom", O_RDONLY)) < 0)
tmate_fatal("Cannot open /dev/urandom");

1
tmate.h
View File

@ -282,6 +282,7 @@ static inline bool tmate_has_websocket(void)
extern void tmate_preload_trace_lib(void);
extern void tmate_print_stack_trace(void);
extern void tmate_catch_sigsegv(void);
/* tmux.c */