diff options
Diffstat (limited to 'test/asan/TestCases/Linux/segv_read_write.c')
-rw-r--r-- | test/asan/TestCases/Linux/segv_read_write.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/asan/TestCases/Linux/segv_read_write.c b/test/asan/TestCases/Linux/segv_read_write.c new file mode 100644 index 000000000..d5a62c66d --- /dev/null +++ b/test/asan/TestCases/Linux/segv_read_write.c @@ -0,0 +1,26 @@ +// RUN: %clangxx_asan -std=c++11 -O0 %s -o %t +// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=READ +// RUN: not %run %t write 2>&1 | FileCheck %s --check-prefix=WRITE +// UNSUPPORTED: powerpc64,mips + +#include <sys/mman.h> + +static volatile int sink; +__attribute__((noinline)) void Read(int *ptr) { sink = *ptr; } +__attribute__((noinline)) void Write(int *ptr) { *ptr = 0; } +int main(int argc, char **argv) { + // Writes to shadow are detected as reads from shadow gap (because of how the + // shadow mapping works). This is kinda hard to fix. Test a random address in + // the application part of the address space. + void *volatile p = + mmap(nullptr, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + munmap(p, 4096); + if (argc == 1) + Read((int *)p); + else + Write((int *)p); +} +// READ: AddressSanitizer: SEGV on unknown address +// READ: The signal is caused by a READ memory access. +// WRITE: AddressSanitizer: SEGV on unknown address +// WRITE: The signal is caused by a WRITE memory access. |