tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

am 6ef0dfec: Merge "Add a new test to crasher to upset dlmalloc."

Browse source 
* commit '6ef0dfecca9fde5abe15ceea30e0615897d7b374':
  Add a new test to crasher to upset dlmalloc.
This commit is contained in:
Elliott Hughes 2013-06-12 14:23:29 -07:00 committed by Android Git Automerger
commit 65d8ec099d
1 changed files with 34 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

59
debuggerd/crasher.c
View file

@ -21,8 +21,7 @@ extern const char* __progname;
void crash1(void);
void crashnostack(void);
void maybeabort(void);
int do_action(const char* arg);
static int do_action(const char* arg);
static void debuggerd_connect()
{
@ -30,14 +29,20 @@ static void debuggerd_connect()
int s;
sprintf(tmp, "%d", gettid());
s = socket_local_client("android:debuggerd",
ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
if(s >= 0) {
read(s, tmp, 1);
close(s);
}
}
int smash_stack(int i) {
static void maybeabort() {
if(time(0) != 42) {
abort();
}
}
static int smash_stack(int i) {
printf("crasher: deliberately corrupting stack...\n");
// Unless there's a "big enough" buffer on the stack, gcc
// doesn't bother inserting checks.
@ -49,19 +54,19 @@ int smash_stack(int i) {
return *(int*)(&buf[0]);
}
__attribute__((noinline)) void overflow_stack(void* p) {
__attribute__((noinline)) static void overflow_stack(void* p) {
fprintf(stderr, "p = %p\n", p);
void* buf[1];
buf[0] = p;
overflow_stack(&buf);
}
void test_call1()
static void test_call1()
{
*((int*) 32) = 1;
}
void *noisy(void *x)
static void *noisy(void *x)
{
char c = (unsigned) x;
for(;;) {
@ -72,7 +77,7 @@ void *noisy(void *x)
return 0;
}
int ctest()
static int ctest()
{
pthread_t thr;
pthread_attr_t attr;
@ -90,7 +95,7 @@ static void* thread_callback(void* raw_arg)
return (void*) do_action((const char*) raw_arg);
}
int do_action_on_thread(const char* arg)
static int do_action_on_thread(const char* arg)
{
pthread_t t;
pthread_create(&t, NULL, thread_callback, (void*) arg);
@ -99,22 +104,27 @@ int do_action_on_thread(const char* arg)
return (int) result;
}
__attribute__((noinline)) int crash3(int a) {
*((int*) 0xdead) = a;
return a*4;
__attribute__((noinline)) static int crash3(int a) {
*((int*) 0xdead) = a;
return a*4;
}
__attribute__((noinline)) int crash2(int a) {
a = crash3(a) + 2;
return a*3;
__attribute__((noinline)) static int crash2(int a) {
a = crash3(a) + 2;
return a*3;
}
__attribute__((noinline)) int crash(int a) {
a = crash2(a) + 1;
return a*2;
__attribute__((noinline)) static int crash(int a) {
a = crash2(a) + 1;
return a*2;
}
int do_action(const char* arg)
static void abuse_heap() {
char buf[16];
free((void*) buf); // GCC is smart enough to warn about this, but we're doing it deliberately.
}
static int do_action(const char* arg)
{
fprintf(stderr,"crasher: init pid=%d tid=%d\n", getpid(), gettid());
@ -134,12 +144,16 @@ int do_action(const char* arg)
return crash(42);
} else if (!strcmp(arg,"abort")) {
maybeabort();
} else if (!strcmp(arg, "heap-usage")) {
abuse_heap();
}
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, " heap-corruption cause a libc abort by corrupting the heap\n");
fprintf(stderr, " heap-usage cause a libc abort by abusing a heap function\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");
@ -159,11 +173,6 @@ int main(int argc, char **argv)
} else {
crash1();
}
return 0;
}
void maybeabort()
{
if(time(0) != 42) abort();
}