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// Test __sanitizer_coverage_pc_buffer().
// RUN: %clangxx_asan -fsanitize-coverage=edge %s -o %t && %run %t
// UNSUPPORTED: android
#include <assert.h>
#include <sanitizer/coverage_interface.h>
#include <stdio.h>
static volatile int sink;
__attribute__((noinline)) void bar() { sink = 2; }
__attribute__((noinline)) void foo() { sink = 1; }
void assertNotZeroPcs(uintptr_t *buf, uintptr_t size) {
assert(buf);
for (uintptr_t i = 0; i < size; ++i)
assert(buf[i]);
}
int main() {
{
uintptr_t *buf = NULL;
uintptr_t sz = __sanitizer_get_coverage_pc_buffer(&buf);
assertNotZeroPcs(buf, sz);
assert(sz);
}
{
uintptr_t *buf = NULL;
uintptr_t sz = __sanitizer_get_coverage_pc_buffer(&buf);
// call functions for the first time.
foo();
bar();
uintptr_t *buf1 = NULL;
uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer(&buf1);
assertNotZeroPcs(buf1, sz1);
assert(buf1 == buf);
assert(sz1 > sz);
}
{
uintptr_t *buf = NULL;
uintptr_t sz = __sanitizer_get_coverage_pc_buffer(&buf);
// second call shouldn't increase coverage.
bar();
uintptr_t *buf1 = NULL;
uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer(&buf1);
assertNotZeroPcs(buf1, sz1);
assert(buf1 == buf);
assert(sz1 == sz);
}
{
uintptr_t *buf = NULL;
uintptr_t sz = __sanitizer_get_coverage_pc_buffer(&buf);
// reset coverage to 0.
__sanitizer_reset_coverage();
uintptr_t *buf1 = NULL;
uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer(&buf1);
assertNotZeroPcs(buf1, sz1);
assert(buf1 == buf);
assert(sz1 < sz);
}
}
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