27 lines
1.0 KiB
C
27 lines
1.0 KiB
C
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// RUN: %clangxx_asan -std=c++11 -O0 %s -o %t
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// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=READ
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// RUN: not %run %t write 2>&1 | FileCheck %s --check-prefix=WRITE
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// UNSUPPORTED: powerpc64,mips,s390
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#include <sys/mman.h>
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static volatile int sink;
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__attribute__((noinline)) void Read(int *ptr) { sink = *ptr; }
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__attribute__((noinline)) void Write(int *ptr) { *ptr = 0; }
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int main(int argc, char **argv) {
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// Writes to shadow are detected as reads from shadow gap (because of how the
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// shadow mapping works). This is kinda hard to fix. Test a random address in
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// the application part of the address space.
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void *volatile p =
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mmap(nullptr, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
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munmap(p, 4096);
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if (argc == 1)
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Read((int *)p);
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else
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Write((int *)p);
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}
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// READ: AddressSanitizer: SEGV on unknown address
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// READ: The signal is caused by a READ memory access.
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// WRITE: AddressSanitizer: SEGV on unknown address
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// WRITE: The signal is caused by a WRITE memory access.
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