Introduce -fsanitize-stats flag.

This is part of a new statistics gathering feature for the sanitizers.
See clang/docs/SanitizerStats.rst for further info and docs.

Differential Revision: http://reviews.llvm.org/D16175

llvm-svn: 257971

1 files changed, 50 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/cfi-stats.cpp b/clang/test/CodeGenCXX/cfi-stats.cpp
new file mode 100644
index 00000000000..49c067784c4
--- /dev/null
+++ b/clang/test/CodeGenCXX/cfi-stats.cpp
@@ -0,0 +1,50 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-vcall,cfi-nvcall,cfi-derived-cast,cfi-unrelated-cast,cfi-icall -fsanitize-stats -emit-llvm -o - %s | FileCheck --check-prefix=CHECK %s
+
+// CHECK: [[STATS:@[^ ]*]] = internal global { i8*, i32, [5 x [2 x i8*]] } { i8* null, i32 5, [5 x [2 x i8*]]
+// CHECK: {{\[\[}}2 x i8*] zeroinitializer,
+// CHECK: [2 x i8*] [i8* null, i8* inttoptr (i64 2305843009213693952 to i8*)],
+// CHECK: [2 x i8*] [i8* null, i8* inttoptr (i64 4611686018427387904 to i8*)],
+// CHECK: [2 x i8*] [i8* null, i8* inttoptr (i64 6917529027641081856 to i8*)],
+// CHECK: [2 x i8*] [i8* null, i8* inttoptr (i64 -9223372036854775808 to i8*)]] }
+
+// CHECK: @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 0, void ()* [[CTOR:@[^ ]*]], i8* null }]
+
+struct A {
+  virtual void vf();
+  void nvf();
+};
+struct B : A {};
+
+// CHECK: @vcall
+extern "C" void vcall(A *a) {
+  // CHECK: call void @__sanitizer_stat_report({{.*}}[[STATS]]{{.*}}i64 0, i32 2, i64 0
+  a->vf();
+}
+
+// CHECK: @nvcall
+extern "C" void nvcall(A *a) {
+  // CHECK: call void @__sanitizer_stat_report({{.*}}[[STATS]]{{.*}}i64 0, i32 2, i64 1
+  a->nvf();
+}
+
+// CHECK: @dcast
+extern "C" void dcast(A *a) {
+  // CHECK: call void @__sanitizer_stat_report({{.*}}[[STATS]]{{.*}}i64 0, i32 2, i64 2
+  static_cast<B *>(a);
+}
+
+// CHECK: @ucast
+extern "C" void ucast(void *a) {
+  // CHECK: call void @__sanitizer_stat_report({{.*}}[[STATS]]{{.*}}i64 0, i32 2, i64 3
+  reinterpret_cast<A *>(a);
+}
+
+// CHECK: @icall
+extern "C" void icall(void (*p)()) {
+  // CHECK: call void @__sanitizer_stat_report({{.*}}[[STATS]]{{.*}}i64 0, i32 2, i64 4
+  p();
+}
+
+// CHECK: define internal void [[CTOR]]()
+// CHECK-NEXT: call void @__sanitizer_stat_init(i8* bitcast ({ i8*, i32, [5 x [2 x i8*]] }* [[STATS]] to i8*))
+// CHECK-NEXT: ret void