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Code Issues Releases Wiki Activity

Server logs stack trace on SIGSEGV

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This commit is contained in:
Nicolas Viennot 2013-06-13 05:53:43 -04:00
parent bc72493b91
commit 04dfad47a8
5 changed files with 21 additions and 3 deletions
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1
Makefile.am
View File

@ -23,6 +23,7 @@ endif
CFLAGS += -Wno-unused-parameter -Wno-unused-variable CFLAGS += -Wno-unused-parameter -Wno-unused-variable
CFLAGS += -Ilibssh/include/ -Imsgpack/src CFLAGS += -Ilibssh/include/ -Imsgpack/src
CFLAGS += -rdynamic # for stack traces
if IS_DEVENV if IS_DEVENV
CFLAGS += -DDEVENV CFLAGS += -DDEVENV

6
tmate-debug.c
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@ -73,3 +73,9 @@ void tmate_print_trace(void)
free(strings); free(strings);
} }
void tmate_preload_trace_lib(void)
{
void *array[0];
backtrace(array, 0);
}

2
tmate-slave.c
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@ -61,6 +61,8 @@ int main(int argc, char **argv)
(mkdir(TMATE_WORKDIR "/jail", 0700) < 0 && errno != EEXIST)) (mkdir(TMATE_WORKDIR "/jail", 0700) < 0 && errno != EEXIST))
tmate_fatal("Cannot prepare session in " TMATE_WORKDIR); tmate_fatal("Cannot prepare session in " TMATE_WORKDIR);
tmate_preload_trace_lib();
tmate_ssh_server_main(port); tmate_ssh_server_main(port);
return 0; return 0;
} }

8
tmate-ssh-server.c
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@ -189,11 +189,18 @@ static void handle_sigalrm(void)
tmate_fatal("Connection grace period (%d) passed", SSH_GRACE_PERIOD); tmate_fatal("Connection grace period (%d) passed", SSH_GRACE_PERIOD);
} }
static void handle_sigsegv(void)
{
tmate_print_trace();
tmate_fatal("CRASH");
}
static void signal_handler(int sig) static void signal_handler(int sig)
{ {
switch (sig) { switch (sig) {
case SIGCHLD: handle_sigchld(); break; case SIGCHLD: handle_sigchld(); break;
case SIGALRM: handle_sigalrm(); break; case SIGALRM: handle_sigalrm(); break;
case SIGSEGV: handle_sigsegv(); break;
} }
} }
@ -201,6 +208,7 @@ static void setup_signals(void)
{ {
signal(SIGCHLD, signal_handler); signal(SIGCHLD, signal_handler);
signal(SIGALRM, signal_handler); signal(SIGALRM, signal_handler);
signal(SIGSEGV, signal_handler);
} }
static void ssh_log_cb(ssh_session session, int priority, static void ssh_log_cb(ssh_session session, int priority,

1
tmate.h
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@ -137,6 +137,7 @@ extern const char *tmate_session_token;
extern void tmate_spawn_slave(struct tmate_ssh_client *client); extern void tmate_spawn_slave(struct tmate_ssh_client *client);
/* tmate-debug.c */ /* tmate-debug.c */
extern void tmate_preload_trace_lib(void);
extern void tmate_print_trace(void); extern void tmate_print_trace(void);
/* tmux-bare.c */ /* tmux-bare.c */