| ; This check verifies that stack depth instrumentation works correctly. |
| ; RUN: opt < %s -sancov -sanitizer-coverage-level=1 \ |
| ; RUN: -sanitizer-coverage-stack-depth -S | FileCheck %s |
| ; RUN: opt < %s -sancov -sanitizer-coverage-level=3 \ |
| ; RUN: -sanitizer-coverage-stack-depth -sanitizer-coverage-trace-pc-guard \ |
| ; RUN: -S | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; CHECK: @__sancov_lowest_stack = thread_local(initialexec) global i64 -1 |
| @__sancov_lowest_stack = thread_local global i64 0, align 8 |
| |
| define i32 @foo() { |
| entry: |
| ; CHECK-LABEL: define i32 @foo |
| ; CHECK-NOT: call i8* @llvm.frameaddress(i32 0) |
| ; CHECK-NOT: @__sancov_lowest_stack |
| ; CHECK: ret i32 7 |
| |
| ret i32 7 |
| } |
| |
| define i32 @bar() { |
| entry: |
| ; CHECK-LABEL: define i32 @bar |
| ; CHECK: [[framePtr:%[^ \t]+]] = call i8* @llvm.frameaddress(i32 0) |
| ; CHECK: [[frameInt:%[^ \t]+]] = ptrtoint i8* [[framePtr]] to [[intType:i[0-9]+]] |
| ; CHECK: [[lowest:%[^ \t]+]] = load [[intType]], [[intType]]* @__sancov_lowest_stack |
| ; CHECK: [[cmp:%[^ \t]+]] = icmp ult [[intType]] [[frameInt]], [[lowest]] |
| ; CHECK: br i1 [[cmp]], label %[[ifLabel:[^ \t]+]], label |
| ; CHECK: <label>:[[ifLabel]]: |
| ; CHECK: store [[intType]] [[frameInt]], [[intType]]* @__sancov_lowest_stack |
| ; CHECK: %call = call i32 @foo() |
| ; CHECK: ret i32 %call |
| |
| %call = call i32 @foo() |
| ret i32 %call |
| } |
| |
| define weak_odr hidden i64* @_ZTW21__sancov_lowest_stack() { |
| ret i64* @__sancov_lowest_stack |
| } |
