SDL/test/torturethread.c
Philipp Wiesemann 0e45984fa0 Fixed crash if initialization of EGL failed but was tried again later.
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly
uninitialized data structure if loading the library first failed. A later try to
use EGL then skipped initialization and assumed it was previously successful
because the data structure now already existed. This led to at least one crash
in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was
dereferenced to make a call to eglBindAPI().
2015-06-21 17:33:46 +02:00

114 lines
2.7 KiB
C

/*
Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely.
*/
/* Simple test of the SDL threading code */
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include "SDL.h"
#define NUMTHREADS 10
static char volatile time_for_threads_to_die[NUMTHREADS];
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
SDL_Quit();
exit(rc);
}
int SDLCALL
SubThreadFunc(void *data)
{
while (!*(int volatile *) data) {
; /* SDL_Delay(10); *//* do nothing */
}
return 0;
}
int SDLCALL
ThreadFunc(void *data)
{
SDL_Thread *sub_threads[NUMTHREADS];
int flags[NUMTHREADS];
int i;
int tid = (int) (uintptr_t) data;
SDL_Log("Creating Thread %d\n", tid);
for (i = 0; i < NUMTHREADS; i++) {
char name[64];
SDL_snprintf(name, sizeof (name), "Child%d_%d", tid, i);
flags[i] = 0;
sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
}
SDL_Log("Thread '%d' waiting for signal\n", tid);
while (time_for_threads_to_die[tid] != 1) {
; /* do nothing */
}
SDL_Log("Thread '%d' sending signals to subthreads\n", tid);
for (i = 0; i < NUMTHREADS; i++) {
flags[i] = 1;
SDL_WaitThread(sub_threads[i], NULL);
}
SDL_Log("Thread '%d' exiting!\n", tid);
return 0;
}
int
main(int argc, char *argv[])
{
SDL_Thread *threads[NUMTHREADS];
int i;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
/* Load the SDL library */
if (SDL_Init(0) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
return (1);
}
signal(SIGSEGV, SIG_DFL);
for (i = 0; i < NUMTHREADS; i++) {
char name[64];
SDL_snprintf(name, sizeof (name), "Parent%d", i);
time_for_threads_to_die[i] = 0;
threads[i] = SDL_CreateThread(ThreadFunc, name, (void*) (uintptr_t) i);
if (threads[i] == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
quit(1);
}
}
for (i = 0; i < NUMTHREADS; i++) {
time_for_threads_to_die[i] = 1;
}
for (i = 0; i < NUMTHREADS; i++) {
SDL_WaitThread(threads[i], NULL);
}
SDL_Quit();
return (0);
}