1// Test that globals from different shared objects all get registered.
2
3// This source file is compiled into three different source object files. Each
4// object file declares a global buffer. The first two are linked together, and
5// the third is loaded at runtime. We make sure that out-of-bounds accesses
6// are caught for all three buffers.
7
8// RUN: %clang_asan -c -o %t-one.o -DMAIN_FILE %s
9// RUN: %clang_asan -c -o %t-two.o -DSECONDARY_FILE %s
10// RUN: %clang_asan -o %t %t-one.o %t-two.o %libdl
11// RUN: %clang_asan -o %t-dynamic.so -shared -fPIC -DSHARED_LIBRARY_FILE %s
12// RUN: not %run %t 1 2>&1 | FileCheck --check-prefix ASAN-CHECK-1 %s
13// RUN: not %run %t 2 2>&1 | FileCheck --check-prefix ASAN-CHECK-2 %s
14// RUN: not %run %t 3 2>&1 | FileCheck --check-prefix ASAN-CHECK-3 %s
15
16#if MAIN_FILE
17
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_FILE
60
61extern char buffer2[1];
62char buffer2[1] = { 0 };
63
64#elif SHARED_LIBRARY_FILE
65
66extern char buffer3[1];
67char buffer3[1] = { 0 };
68
69#endif
70

source code of compiler-rt/test/asan/TestCases/Posix/global-registration.c