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platform_system_core
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Merge "Add a stack overflow test to crasher, and document all the options."

This commit is contained in:
Elliott Hughes 2013-04-24 01:27:40 +00:00 committed by Gerrit Code Review
parent b73a0ef4d0 3808c4ecb4
commit cb6a842c6e
1 changed files with 38 additions and 27 deletions
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65
debuggerd/crasher.c
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@ -17,6 +17,8 @@
#include <cutils/sockets.h>
extern const char* __progname;
void crash1(void);
void crashnostack(void);
void maybeabort(void);
@ -47,22 +49,18 @@ int smash_stack(int i) {
return *(int*)(&buf[0]);
}
__attribute__((noinline)) void overflow_stack(void* p) {
fprintf(stderr, "p = %p\n", p);
void* buf[1];
buf[0] = p;
overflow_stack(&buf);
}
void test_call1()
{
*((int*) 32) = 1;
}
void *test_thread(void *x)
{
printf("crasher: thread pid=%d tid=%d\n", getpid(), gettid());
sleep(1);
test_call1();
printf("goodbye\n");
return 0;
}
void *noisy(void *x)
{
char c = (unsigned) x;
@ -118,35 +116,48 @@ __attribute__((noinline)) int crash(int a) {
int do_action(const char* arg)
{
if(!strncmp(arg, "thread-", strlen("thread-"))) {
fprintf(stderr,"crasher: init pid=%d tid=%d\n", getpid(), gettid());
if (!strncmp(arg, "thread-", strlen("thread-"))) {
return do_action_on_thread(arg + strlen("thread-"));
} else if (!strcmp(arg,"smash-stack")) {
return smash_stack(42);
} else if (!strcmp(arg,"stack-overflow")) {
overflow_stack(NULL);
} else if (!strcmp(arg,"nostack")) {
crashnostack();
} else if (!strcmp(arg,"ctest")) {
return ctest();
} else if (!strcmp(arg,"exit")) {
exit(1);
} else if (!strcmp(arg,"crash")) {
return crash(42);
} else if (!strcmp(arg,"abort")) {
maybeabort();
}
if(!strcmp(arg,"smash-stack")) return smash_stack(42);
if(!strcmp(arg,"nostack")) crashnostack();
if(!strcmp(arg,"ctest")) return ctest();
if(!strcmp(arg,"exit")) exit(1);
if(!strcmp(arg,"crash")) return crash(42);
if(!strcmp(arg,"abort")) maybeabort();
pthread_t thr;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_create(&thr, &attr, test_thread, 0);
while(1) sleep(1);
fprintf(stderr, "%s OP\n", __progname);
fprintf(stderr, "where OP is:\n");
fprintf(stderr, " smash-stack overwrite a stack-guard canary\n");
fprintf(stderr, " stack-overflow recurse until the stack overflows\n");
fprintf(stderr, " nostack crash with a NULL stack pointer\n");
fprintf(stderr, " ctest (obsoleted by thread-crash?)\n");
fprintf(stderr, " exit call exit(1)\n");
fprintf(stderr, " crash cause a SIGSEGV\n");
fprintf(stderr, " abort call abort()\n");
fprintf(stderr, "prefix any of the above with 'thread-' to not run\n");
fprintf(stderr, "on the process' main thread.\n");
return EXIT_SUCCESS;
}
int main(int argc, char **argv)
{
fprintf(stderr,"crasher: built at " __TIME__ "!@\n");
fprintf(stderr,"crasher: init pid=%d tid=%d\n", getpid(), gettid());
if(argc > 1) {
return do_action(argv[1]);
} else {
crash1();
// *((int*) 0) = 42;
}
return 0;