File: dead-strip.c

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llvm-toolchain-19 1%3A19.1.7-3
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// Test that AddressSanitizer does not re-animate dead globals when dead
// stripping is turned on.
//
// This test verifies that an out-of-bounds access on a global variable is
// detected after dead stripping has been performed. This proves that the
// runtime is able to register globals in the __DATA,__asan_globals section.

// REQUIRES: osx-ld64-live_support

// RUN: %clang_asan %min_macos_deployment_target=10.11 -Xlinker -dead_strip -o %t %s
// RUN: llvm-nm --format=posix %t | FileCheck --check-prefix NM-CHECK %s
// RUN: not %run %t 2>&1 | FileCheck --check-prefix ASAN-CHECK %s

int alive[1] = {};
int dead[1] = {};
// NM-CHECK: {{^_alive }}
// NM-CHECK-NOT: {{^_dead }}

int main(int argc, char *argv[]) {
  alive[argc] = 0;
  // ASAN-CHECK: {{0x.* is located 0 bytes after global variable}}
  return 0;
}