* Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de.
* Distributed under the terms of the MIT License.
*/
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <OS.h>
static int64 sHandledSignals = 0;
static status_t
signal_pusher(void* data)
{
team_info teamInfo;
get_team_info(B_CURRENT_TEAM, &teamInfo);
thread_id mainThread = teamInfo.team;
while (true) {
send_signal(mainThread, SIGUSR1);
snooze(1000);
}
return B_OK;
}
static void
signal_handler(int signal)
{
free(malloc(10));
sHandledSignals++;
}
int
main()
{
const int testSeconds = 2;
printf("Trying to provoke allocator deadlock in signal handler.\n");
printf("If successful test will finish in %d seconds...\n", testSeconds);
if (signal(SIGUSR1, signal_handler) == SIG_ERR) {
fprintf(stderr, "Error: Failed to install signal handler: %s\n",
strerror(errno));
exit(1);
}
thread_id signalThread = spawn_thread(&signal_pusher, "signal pusher",
B_NORMAL_PRIORITY, NULL);
resume_thread(signalThread);
bigtime_t endTime = system_time() + 1000000 * (bigtime_t)testSeconds;
while (system_time() < endTime) {
const int allocationCount = 1000;
void* allocations[allocationCount];
for (int i = 0; i < allocationCount; i++)
allocations[i] = malloc(rand() % 50);
for (int i = 0; i < allocationCount; i++)
free(allocations[i]);
}
kill_thread(signalThread);
snooze(1000);
printf("test successful, handled %" B_PRId64 " signals\n", sHandledSignals);
return 0;
}
