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// RUN: %clangxx_asan -O0 %s -pthread -o %t && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O1 %s -pthread -o %t && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O2 %s -pthread -o %t && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_asan -O3 %s -pthread -o %t && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck %s
// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t
// Regression test for a CHECK failure with small stack size and large frame.
// RUN: %clangxx_asan -O3 %s -pthread -o %t -DkSize=10000 -DUseThread -DkStackSize=131072 && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck --check-prefix=THREAD %s
//
// Test that we can find UAR in a thread other than main:
// RUN: %clangxx_asan -DUseThread -O2 %s -pthread -o %t && %env_asan_opts=detect_stack_use_after_return=1 not %run %t 2>&1 | FileCheck --check-prefix=THREAD %s
//
// Test the max_uar_stack_size_log/min_uar_stack_size_log flag.
//
// RUN: %env_asan_opts=detect_stack_use_after_return=1:max_uar_stack_size_log=20:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-20 %s
// RUN: %env_asan_opts=detect_stack_use_after_return=1:min_uar_stack_size_log=24:max_uar_stack_size_log=24:verbosity=1 not %run %t 2>&1 | FileCheck --check-prefix=CHECK-24 %s
// This test runs out of stack on AArch64.
// UNSUPPORTED: aarch64
// stack size log lower than expected
// XFAIL: freebsd
// FIXME: Fix this test for dynamic runtime on arm linux.
// UNSUPPORTED: (arm-linux || armhf-linux) && asan-dynamic-runtime
#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef kSize
# define kSize 1
#endif
#ifndef UseThread
# define UseThread 0
#endif
#ifndef kStackSize
# define kStackSize 0
#endif
__attribute__((noinline))
char *Ident(char *x) {
fprintf(stderr, "1: %p\n", x);
return x;
}
__attribute__((noinline))
char *Func1() {
char local[kSize];
return Ident(local);
}
__attribute__((noinline))
void Func2(char *x) {
fprintf(stderr, "2: %p\n", x);
*x = 1;
// CHECK: WRITE of size 1 {{.*}} thread T0
// CHECK: #0{{.*}}Func2{{.*}}stack-use-after-return.cc:[[@LINE-2]]
// CHECK: is located in stack of thread T0 at offset
// CHECK: 'local'{{.*}} <== Memory access at offset {{16|32}} is inside this variable
// THREAD: WRITE of size 1 {{.*}} thread T{{[1-9]}}
// THREAD: #0{{.*}}Func2{{.*}}stack-use-after-return.cc:[[@LINE-6]]
// THREAD: is located in stack of thread T{{[1-9]}} at offset
// THREAD: 'local'{{.*}} <== Memory access at offset {{16|32}} is inside this variable
// CHECK-20: T0: FakeStack created:{{.*}} stack_size_log: 20
// CHECK-24: T0: FakeStack created:{{.*}} stack_size_log: 24
}
void *Thread(void *unused) {
Func2(Func1());
return NULL;
}
int main(int argc, char **argv) {
#if UseThread
pthread_attr_t attr;
pthread_attr_init(&attr);
if (kStackSize > 0) {
size_t desired_stack_size = kStackSize;
if (desired_stack_size < PTHREAD_STACK_MIN) {
desired_stack_size = PTHREAD_STACK_MIN;
}
int ret = pthread_attr_setstacksize(&attr, desired_stack_size);
if (ret != 0) {
fprintf(stderr, "pthread_attr_setstacksize returned %d\n", ret);
abort();
}
size_t stacksize_check;
ret = pthread_attr_getstacksize(&attr, &stacksize_check);
if (ret != 0) {
fprintf(stderr, "pthread_attr_getstacksize returned %d\n", ret);
abort();
}
if (stacksize_check != desired_stack_size) {
fprintf(stderr, "Unable to set stack size to %d, the stack size is %d.\n",
(int)desired_stack_size, (int)stacksize_check);
abort();
}
}
pthread_t t;
pthread_create(&t, &attr, Thread, 0);
pthread_attr_destroy(&attr);
pthread_join(t, 0);
#else
Func2(Func1());
#endif
return 0;
}
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