Vendor import of compiler-rt trunk r256945:vendor/compiler-rt/compiler-rt-trunk-r256945

https://llvm.org/svn/llvm-project/compiler-rt/trunk@256945

1 files changed, 48 insertions, 0 deletions

diff --git a/test/asan/TestCases/coverage-pc-buffer.cc b/test/asan/TestCases/coverage-pc-buffer.cc
new file mode 100644
index 000000000000..67b6935ec602
--- /dev/null
+++ b/test/asan/TestCases/coverage-pc-buffer.cc
@@ -0,0 +1,48 @@
+// 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);
+
+  foo();
+  bar();
+  uintptr_t *buf1 = NULL;
+  uintptr_t sz1 = __sanitizer_get_coverage_pc_buffer(&buf1);
+  assertNotZeroPcs(buf1, sz1);
+  assert(buf1 == buf);
+  assert(sz1 > sz);
+
+  bar();
+  uintptr_t *buf2 = NULL;
+  uintptr_t sz2 = __sanitizer_get_coverage_pc_buffer(&buf2);
+  assertNotZeroPcs(buf2, sz2);
+  assert(buf2 == buf);
+  assert(sz2 > sz1);
+
+  __sanitizer_reset_coverage();
+  uintptr_t *buf3 = NULL;
+  uintptr_t sz3 = __sanitizer_get_coverage_pc_buffer(&buf3);
+  assertNotZeroPcs(buf3, sz3);
+  assert(buf3 == buf);
+  assert(sz3 < sz2);
+}