test/asan/TestCases/Linux/coverage.cc

// RUN: %clangxx_asan -fsanitize-coverage=1 -DSHARED %s -shared -o %T/libcoverage_test.so -fPIC
// RUN: %clangxx_asan -fsanitize-coverage=1 %s   -o %t -Wl,-R,\$ORIGIN -L%T -lcoverage_test
// RUN: export ASAN_OPTIONS=coverage=1:verbosity=1
// RUN: rm -rf %T/coverage && mkdir -p %T/coverage && cd %T/coverage
// RUN: %run %t 2>&1         | FileCheck %s --check-prefix=CHECK-main
// RUN: %sancov print coverage.*sancov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV1
// RUN: %run %t foo 2>&1     | FileCheck %s --check-prefix=CHECK-foo
// RUN: %sancov print coverage.*sancov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV2
// RUN: %run %t bar 2>&1     | FileCheck %s --check-prefix=CHECK-bar
// RUN: %sancov print coverage.*sancov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV2
// RUN: %run %t foo bar 2>&1 | FileCheck %s --check-prefix=CHECK-foo-bar
// RUN: %sancov print coverage.*sancov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV2
// RUN: %sancov print libcoverage_test.*sancov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV1
// RUN: %sancov merge coverage.*sancov > merged-cov
// RUN: %sancov print merged-cov 2>&1 | FileCheck %s --check-prefix=CHECK-SANCOV2
// RUN: not %run %t foo bar 4    2>&1 | FileCheck %s --check-prefix=CHECK-report
// RUN: not %run %t foo bar 4 5  2>&1 | FileCheck %s --check-prefix=CHECK-segv
// RUN: cd .. && rm coverage -r
//
// https://code.google.com/p/address-sanitizer/issues/detail?id=263
// XFAIL: android

#include <sanitizer/coverage_interface.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#ifdef SHARED
void bar() { printf("bar\n"); }
#else
__attribute__((noinline))
void foo() { printf("foo\n"); }
extern void bar();

int G[4];

int main(int argc, char **argv) {
  fprintf(stderr, "PID: %d\n", getpid());
  for (int i = 1; i < argc; i++) {
    if (!strcmp(argv[i], "foo")) {
      uintptr_t old_coverage = __sanitizer_get_total_unique_coverage();
      foo();
      uintptr_t new_coverage = __sanitizer_get_total_unique_coverage();
      assert(new_coverage > old_coverage);
    }
    if (!strcmp(argv[i], "bar"))
      bar();
  }
  if (argc == 5) {
    static volatile char *zero = 0;
    *zero = 0;  // SEGV if argc == 5.
  }
  return G[argc];  // Buffer overflow if argc >= 4.
}
#endif

// CHECK-main: PID: [[PID:[0-9]+]]
// CHECK-main: [[PID]].sancov: 1 PCs written
// CHECK-main-NOT: .so.[[PID]]
//
// CHECK-foo: PID: [[PID:[0-9]+]]
// CHECK-foo: [[PID]].sancov: 2 PCs written
// CHECK-foo-NOT: .so.[[PID]]
//
// CHECK-bar: PID: [[PID:[0-9]+]]
// CHECK-bar: .so.[[PID]].sancov: 1 PCs written
// CHECK-bar: [[PID]].sancov: 1 PCs written
//
// CHECK-foo-bar: PID: [[PID:[0-9]+]]
// CHECK-foo-bar: so.[[PID]].sancov: 1 PCs written
// CHECK-foo-bar: [[PID]].sancov: 2 PCs written
//
// CHECK-report: AddressSanitizer: global-buffer-overflow
// CHECK-report: PCs written
//
// CHECK-segv: AddressSanitizer: SEGV
// CHECK-segv: PCs written
//
// CHECK-SANCOV1: 1 PCs total
// CHECK-SANCOV2: 2 PCs total