Precise which processus on which host triggered a segfault

starpu-runtime · Mar 6, 2025 · af68b76 · af68b76
1 parent 2a0e913
commit af68b76
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/include/starpu_util.h b/include/starpu_util.h
@@ -193,12 +193,13 @@ extern "C" {
 #endif /* __GNUC__ */
 
 #define STARPU_BACKTRACE_LENGTH 32
+#define STARPU_BACKTRACE_FILE stderr
 #ifdef __GLIBC__
 #define STARPU_DUMP_BACKTRACE()                                       \
 	do {                                                          \
 		void *__ptrs[STARPU_BACKTRACE_LENGTH];                \
 		int __n = backtrace(__ptrs, STARPU_BACKTRACE_LENGTH); \
-		backtrace_symbols_fd(__ptrs, __n, 2);                 \
+		backtrace_symbols_fd(__ptrs, __n, fileno(STARPU_BACKTRACE_FILE)); \
 	}                                                             \
 	while (0)
 #else

diff --git a/src/core/workers.c b/src/core/workers.c
@@ -1452,7 +1452,12 @@ void _starpu_handler(int sig)
 	}
 	if (sig == SIGSEGV)
 	{
+		char real_hostname[128];
+		gethostname(real_hostname, sizeof(real_hostname));
+		fprintf(STARPU_BACKTRACE_FILE, "SIGSEGV on %s PID %d\n", real_hostname, getpid());
 		STARPU_DUMP_BACKTRACE();
+		fflush(STARPU_BACKTRACE_FILE);
+
 		void (*sig_act)(int) = act_sigsegv;
 		if (sig_act == NULL)
 			sig_act = SIG_DFL;