forked from OSchip/llvm-project
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
// Regression test for
|
|
// http://code.google.com/p/address-sanitizer/issues/detail?id=19
|
|
// Bug description:
|
|
// 1. application dlopens foo.so
|
|
// 2. asan registers all globals from foo.so
|
|
// 3. application dlcloses foo.so
|
|
// 4. application mmaps some memory to the location where foo.so was before
|
|
// 5. application starts using this mmaped memory, but asan still thinks there
|
|
// are globals.
|
|
// 6. BOOM
|
|
|
|
// RUN: %clangxx_asan -m64 -O0 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m64 -O1 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m64 -O2 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m64 -O3 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m32 -O0 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m32 -O1 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m32 -O2 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
|
|
// RUN: %clangxx_asan -m32 -O3 %p/SharedLibs/dlclose-test-so.cc \
|
|
// RUN: -fPIC -shared -o %t-so.so
|
|
// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
|
|
|
|
#include <assert.h>
|
|
#include <dlfcn.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <string>
|
|
|
|
using std::string;
|
|
|
|
static const int kPageSize = 4096;
|
|
|
|
typedef int *(fun_t)();
|
|
|
|
int main(int argc, char *argv[]) {
|
|
string path = string(argv[0]) + "-so.so";
|
|
printf("opening %s ... \n", path.c_str());
|
|
void *lib = dlopen(path.c_str(), RTLD_NOW);
|
|
if (!lib) {
|
|
printf("error in dlopen(): %s\n", dlerror());
|
|
return 1;
|
|
}
|
|
fun_t *get = (fun_t*)dlsym(lib, "get_address_of_static_var");
|
|
if (!get) {
|
|
printf("failed dlsym\n");
|
|
return 1;
|
|
}
|
|
int *addr = get();
|
|
assert(((size_t)addr % 32) == 0); // should be 32-byte aligned.
|
|
printf("addr: %p\n", addr);
|
|
addr[0] = 1; // make sure we can write there.
|
|
|
|
// Now dlclose the shared library.
|
|
printf("attempting to dlclose\n");
|
|
if (dlclose(lib)) {
|
|
printf("failed to dlclose\n");
|
|
return 1;
|
|
}
|
|
// Now, the page where 'addr' is unmapped. Map it.
|
|
size_t page_beg = ((size_t)addr) & ~(kPageSize - 1);
|
|
void *res = mmap((void*)(page_beg), kPageSize,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE, 0, 0);
|
|
if (res == (char*)-1L) {
|
|
printf("failed to mmap\n");
|
|
return 1;
|
|
}
|
|
addr[1] = 2; // BOOM (if the bug is not fixed).
|
|
printf("PASS\n");
|
|
// CHECK: PASS
|
|
return 0;
|
|
}
|