forked from OSchip/llvm-project
66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
// Test fopencookie interceptor.
|
|
// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
|
|
// RUN: %clangxx_msan -std=c++11 -fsanitize-memory-track-origins -O0 %s -o %t && %run %t
|
|
|
|
#include <assert.h>
|
|
#include <pthread.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <sanitizer/msan_interface.h>
|
|
|
|
constexpr uintptr_t kMagicCookie = 0x12345678;
|
|
|
|
static ssize_t cookie_read(void *cookie, char *buf, size_t size) {
|
|
assert((uintptr_t)cookie == kMagicCookie);
|
|
memset(buf, 0, size);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t cookie_write(void *cookie, const char *buf, size_t size) {
|
|
assert((uintptr_t)cookie == kMagicCookie);
|
|
__msan_check_mem_is_initialized(buf, size);
|
|
return 0;
|
|
}
|
|
|
|
static int cookie_seek(void *cookie, off64_t *offset, int whence) {
|
|
assert((uintptr_t)cookie == kMagicCookie);
|
|
__msan_check_mem_is_initialized(offset, sizeof(*offset));
|
|
return 0;
|
|
}
|
|
|
|
static int cookie_close(void *cookie) {
|
|
assert((uintptr_t)cookie == kMagicCookie);
|
|
return 0;
|
|
}
|
|
|
|
void PoisonStack() { char a[8192]; }
|
|
|
|
void TestPoisonStack() {
|
|
// Verify that PoisonStack has poisoned the stack - otherwise this test is not
|
|
// testing anything.
|
|
char a;
|
|
assert(__msan_test_shadow(&a - 1000, 1) == 0);
|
|
}
|
|
|
|
int main() {
|
|
void *cookie = (void *)kMagicCookie;
|
|
FILE *f = fopencookie(cookie, "rw",
|
|
{cookie_read, cookie_write, cookie_seek, cookie_close});
|
|
PoisonStack();
|
|
TestPoisonStack();
|
|
fseek(f, 100, SEEK_SET);
|
|
char buf[50];
|
|
fread(buf, 50, 1, f);
|
|
fwrite(buf, 50, 1, f);
|
|
fclose(f);
|
|
|
|
f = fopencookie(cookie, "rw", {nullptr, nullptr, nullptr, nullptr});
|
|
fseek(f, 100, SEEK_SET);
|
|
fread(buf, 50, 1, f);
|
|
fwrite(buf, 50, 1, f);
|
|
fclose(f);
|
|
}
|