| 1 | // Test that captures the current behavior of indicator-based ASan ODR checker |
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| 2 | // when globals get unregistered. |
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| 3 | // |
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| 4 | // RUN: %clangxx_asan -g -O0 -DSHARED_LIB -DSIZE=1 %s -fPIC -shared -o %t-so-1.so |
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| 5 | // RUN: %clangxx_asan -g -O0 -DSHARED_LIB -DSIZE=2 %s -fPIC -shared -o %t-so-2.so |
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| 6 | // RUN: %clangxx_asan -g -O0 %s %libdl -Wl,--export-dynamic -o %t |
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| 7 | // RUN: %env_asan_opts=report_globals=2:detect_odr_violation=1 %run %t 2>&1 | FileCheck %s |
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| 8 | |
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| 9 | // FIXME: Checks do not match on Android. |
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| 10 | // UNSUPPORTED: android |
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| 11 | |
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| 12 | #include <cstdlib> |
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| 13 | #include <dlfcn.h> |
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| 14 | #include <stdio.h> |
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| 15 | #include <string> |
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| 16 | |
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| 17 | #ifdef SHARED_LIB |
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| 18 | namespace foo { |
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| 19 | char G[SIZE]; |
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| 20 | } |
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| 21 | #else // SHARED_LIB |
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| 22 | void *dlopen_or_die(std::string &path) { |
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| 23 | void *handle = dlopen(file: path.c_str(), RTLD_NOW); |
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| 24 | if (handle) { |
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| 25 | printf(format: "Successfully called dlopen() on %s\n" , path.c_str()); |
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| 26 | } else { |
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| 27 | printf(format: "Error in dlopen(): %s\n" , dlerror()); |
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| 28 | std::exit(status: 1); |
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| 29 | } |
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| 30 | |
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| 31 | return handle; |
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| 32 | } |
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| 33 | |
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| 34 | void dlclose_or_die(void *handle, std::string &path) { |
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| 35 | if (!dlclose(handle: handle)) { |
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| 36 | printf(format: "Successfully called dlclose() on %s\n" , path.c_str()); |
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| 37 | } else { |
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| 38 | printf(format: "Error in dlclose(): %s\n" , dlerror()); |
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| 39 | std::exit(status: 1); |
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| 40 | } |
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| 41 | } |
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| 42 | |
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| 43 | namespace foo { |
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| 44 | char G[1]; |
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| 45 | } |
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| 46 | |
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| 47 | // main has its own version of foo::G |
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| 48 | // CHECK: Added Global[[MAIN_G:[^\s]+]] size=1/32 name=foo::G {{.*}} |
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| 49 | int main(int argc, char *argv[]) { |
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| 50 | std::string base_path = std::string(argv[0]); |
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| 51 | |
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| 52 | std::string path1 = base_path + "-so-1.so" ; |
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| 53 | // dlopen() brings another foo::G but it matches MAIN_G in size so it's not a |
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| 54 | // violation |
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| 55 | // |
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| 56 | // |
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| 57 | // CHECK: Added Global[[SO1_G:[^\s]+]] size=1/32 name=foo::G {{.*}} |
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| 58 | // CHECK-NOT: ERROR: AddressSanitizer: odr-violation |
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| 59 | void *handle1 = dlopen_or_die(path&: path1); |
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| 60 | // CHECK: Removed Global[[SO1_G]] size=1/32 name=foo::G {{.*}} |
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| 61 | dlclose_or_die(handle: handle1, path&: path1); |
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| 62 | |
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| 63 | // At this point the indicator for foo::G is switched to UNREGISTERED for |
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| 64 | // **both** MAIN_G and SO1_G because the indicator value is shared. |
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| 65 | |
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| 66 | std::string path2 = base_path + "-so-2.so" ; |
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| 67 | // CHECK: Added Global[[SO2_G:[^\s]+]] size=2/32 name=foo::G {{.*}} |
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| 68 | // |
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| 69 | // This brings another foo::G but now different in size from MAIN_G. We |
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| 70 | // should've reported a violation, but we actually don't because of what's |
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| 71 | // described on line60 |
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| 72 | // |
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| 73 | // CHECK-NOT: ERROR: AddressSanitizer: odr-violation |
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| 74 | void *handle2 = dlopen_or_die(path&: path2); |
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| 75 | // CHECK: Removed Global[[MAIN_G]] size=1/32 name=foo::G {{.*}} |
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| 76 | // CHECK: Removed Global[[SO2_G]] size=2/32 name=foo::G {{.*}} |
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| 77 | } |
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| 78 | |
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| 79 | #endif // SHARED_LIB |
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| 80 | |
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