Use libbacktrace to generate better leak callstacks.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3986 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/main.c

@@ -9,6 +9,7 @@
 #include "tests.h"
 #include "util.js.h"
 
+#include <backtrace.h>
 #include <memcheck.h>
 #include <quickjs-libc.h>
 #include <quickjs.h>
@@ -83,6 +84,8 @@ const command_t k_commands[] = {
 	{ "private", _tf_command_private, "Check for private messages the SSB database (just an experiment)." },
 };
 
+struct backtrace_state* g_backtrace_state;
+
 void shedPrivileges()
 {
 #if !defined(_WIN32)
@@ -684,8 +687,19 @@ static void _do_leak_checks(int sig)
 }
 #endif
 
+static void _backtrace_error(void* data, const char* message, int errnum)
+{
+	printf("libbacktrace error %d: %s\n", errnum, message);
+}
+
 int main(int argc, char* argv[])
 {
+	g_backtrace_state = backtrace_create_state(
+		argv[0],
+		0,
+		_backtrace_error,
+		NULL);
+
 #if !defined(_WIN32)
 	prctl(PR_SET_PDEATHSIG, SIGKILL);
 #endif