1 // Test for ASAN_OPTIONS=start_deactivated=1 mode. 2 // Main executable is uninstrumented, but linked to ASan runtime. The shared 3 // library is instrumented. Memory errors before dlopen are not detected. 4 5 // RUN: %clangxx_asan -O0 -DSHARED_LIB %s -fPIC -shared -o %t-so.so 6 // RUN: %clangxx -O0 %s -c -o %t.o 7 // RUN: %clangxx_asan -O0 %t.o -ldl -o %t 8 // RUN: ASAN_OPTIONS=start_deactivated=1 not %run %t 2>&1 | FileCheck %s 9 // XFAIL: arm-linux-gnueabi 10 11 #if !defined(SHARED_LIB) 12 #include <dlfcn.h> 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #include <unistd.h> 17 18 #include <string> 19 20 #include "sanitizer/asan_interface.h" 21 22 void test_malloc_shadow() { 23 char *p = (char *)malloc(100); 24 char *q = (char *)__asan_region_is_poisoned(p + 95, 8); 25 fprintf(stderr, "=%zd=\n", q ? q - (p + 95) : -1); 26 free(p); 27 } 28 29 typedef void (*Fn)(); 30 31 int main(int argc, char *argv[]) { 32 test_malloc_shadow(); 33 // CHECK: =-1= 34 35 std::string path = std::string(argv[0]) + "-so.so"; 36 void *dso = dlopen(path.c_str(), RTLD_NOW); 37 if (!dso) { 38 fprintf(stderr, "dlopen failed: %s\n", dlerror()); 39 return 1; 40 } 41 42 test_malloc_shadow(); 43 // CHECK: =5= 44 45 void *fn = dlsym(dso, "do_another_bad_thing"); 46 if (!fn) { 47 fprintf(stderr, "dlsym failed: %s\n", dlerror()); 48 return 1; 49 } 50 51 ((Fn)fn)(); 52 // CHECK: AddressSanitizer: heap-buffer-overflow 53 // CHECK: READ of size 1 54 // CHECK: {{#0 .* in do_another_bad_thing}} 55 // CHECK: is located 5 bytes to the right of 100-byte region 56 // CHECK: in do_another_bad_thing 57 58 return 0; 59 } 60 #else // SHARED_LIB 61 #include <stdio.h> 62 #include <stdlib.h> 63 64 extern "C" void do_another_bad_thing() { 65 char *volatile p = (char *)malloc(100); 66 printf("%hhx\n", p[105]); 67 } 68 #endif // SHARED_LIB 69
