dll_unload.cpp
1.44 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
#include <stdio.h>
#include <windows.h>
// RUN: %clang_cl_asan -LD /Od -DDLL %s -Fe%t.dll
// RUN: %clang_cl /Od -DEXE %s -Fe%te.exe
// RUN: %env_asan_opts=windows_hook_rtl_allocators=true not %run %te.exe %t.dll 2>&1 | FileCheck %s
// REQUIRES: asan-dynamic-runtime
// REQUIRES: asan-32-bits
#include <cassert>
#include <stdio.h>
#include <windows.h>
extern "C" {
#if defined(EXE)
int main(int argc, char **argv) {
void *region_without_hooks = HeapAlloc(GetProcessHeap(), 0, 10);
HMODULE lib = LoadLibraryA(argv[1]);
assert(lib != INVALID_HANDLE_VALUE);
void *region_w_hooks = HeapAlloc(GetProcessHeap(), 0, 10);
assert(region_w_hooks != nullptr);
assert(0 != FreeLibrary(lib));
fprintf(stderr, "WITHOUT:0x%08x\n", (unsigned int)region_without_hooks);
fprintf(stderr, "WITH:0x%08x\n", (unsigned int)region_w_hooks);
assert(0 != HeapFree(GetProcessHeap(), 0, region_without_hooks));
assert(0 != HeapFree(GetProcessHeap(), 0, region_w_hooks));
HeapFree(GetProcessHeap(), 0, region_w_hooks); //will dump
}
#elif defined(DLL)
// This global is registered at startup.
BOOL WINAPI DllMain(HMODULE, DWORD reason, LPVOID) {
fprintf(stderr, "in DLL(reason=%d)\n", (int)reason);
fflush(0);
return TRUE;
}
// CHECK: in DLL(reason=1)
// CHECK: in DLL(reason=0)
// CHECK: WITHOUT:[[WITHOUT:0x[0-9a-fA-F]+]]
// CHECK: WITH:[[WITH:0x[0-9a-fA-F]+]]
// CHECK: AddressSanitizer: attempting double-free on [[WITH]] in thread T0:
#else
#error oops!
#endif
}