70 lines · c
1// Test that globals from different shared objects all get registered.2 3// This source file is compiled into three different source object files. Each4// object file declares a global buffer. The first two are linked together, and5// the third is loaded at runtime. We make sure that out-of-bounds accesses6// are caught for all three buffers.7 8// RUN: %clang_asan -c -o %t-one.o -DMAIN_FILE %s9// RUN: %clang_asan -c -o %t-two.o -DSECONDARY_FILE %s10// RUN: %clang_asan -o %t %t-one.o %t-two.o %libdl11// RUN: %clang_asan -o %t-dynamic.so -shared -fPIC -DSHARED_LIBRARY_FILE %s12// RUN: not %run %t 1 2>&1 | FileCheck --check-prefix ASAN-CHECK-1 %s13// RUN: not %run %t 2 2>&1 | FileCheck --check-prefix ASAN-CHECK-2 %s14// RUN: not %run %t 3 2>&1 | FileCheck --check-prefix ASAN-CHECK-3 %s15 16#if MAIN_FILE17 18#include <dlfcn.h>19#include <stdio.h>20#include <stdlib.h>21#include <string.h>22 23extern char buffer1[1];24extern char buffer2[1];25char buffer1[1] = { 0 };26 27int main(int argc, char *argv[]) {28 int n = atoi(argv[1]);29 if (n == 1) {30 buffer1[argc] = 0;31 // ASAN-CHECK-1: {{0x.* is located 1 bytes .* 'buffer1'}}32 } else if (n == 2) {33 buffer2[argc] = 0;34 // ASAN-CHECK-2: {{0x.* is located 1 bytes .* 'buffer2'}}35 } else if (n == 3) {36 char *libsuffix = "-dynamic.so";37 char *libpath = malloc(strlen(argv[0]) + strlen(libsuffix) + 1);38 sprintf(libpath, "%s%s", argv[0], libsuffix);39 40 void *handle = dlopen(libpath, RTLD_NOW);41 if (!handle) {42 fprintf(stderr, "dlopen: %s\n", dlerror());43 return 1;44 }45 46 char *buffer = (char *)dlsym(handle, "buffer3");47 if (!buffer) {48 fprintf(stderr, "dlsym: %s\n", dlerror());49 return 1;50 }51 52 buffer[argc] = 0;53 // ASAN-CHECK-3: {{0x.* is located 1 bytes .* 'buffer3'}}54 }55 56 return 0;57}58 59#elif SECONDARY_FILE60 61extern char buffer2[1];62char buffer2[1] = { 0 };63 64#elif SHARED_LIBRARY_FILE65 66extern char buffer3[1];67char buffer3[1] = { 0 };68 69#endif70