1; This check verifies that stack depth instrumentation works correctly. 2; RUN: opt < %s -sancov -sanitizer-coverage-level=1 \ 3; RUN: -sanitizer-coverage-stack-depth -S | FileCheck %s 4; RUN: opt < %s -sancov -sanitizer-coverage-level=3 \ 5; RUN: -sanitizer-coverage-stack-depth -sanitizer-coverage-trace-pc-guard \ 6; RUN: -S | FileCheck %s 7 8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 9target triple = "x86_64-unknown-linux-gnu" 10 11; CHECK: @__sancov_lowest_stack = thread_local(initialexec) global i64 -1 12@__sancov_lowest_stack = thread_local global i64 0, align 8 13 14define i32 @foo() { 15entry: 16; CHECK-LABEL: define i32 @foo 17; CHECK-NOT: call i8* @llvm.frameaddress(i32 0) 18; CHECK-NOT: @__sancov_lowest_stack 19; CHECK: ret i32 7 20 21 ret i32 7 22} 23 24define i32 @bar() { 25entry: 26; CHECK-LABEL: define i32 @bar 27; CHECK: [[framePtr:%[^ \t]+]] = call i8* @llvm.frameaddress(i32 0) 28; CHECK: [[frameInt:%[^ \t]+]] = ptrtoint i8* [[framePtr]] to [[intType:i[0-9]+]] 29; CHECK: [[lowest:%[^ \t]+]] = load [[intType]], [[intType]]* @__sancov_lowest_stack 30; CHECK: [[cmp:%[^ \t]+]] = icmp ult [[intType]] [[frameInt]], [[lowest]] 31; CHECK: br i1 [[cmp]], label %[[ifLabel:[^ \t]+]], label 32; CHECK: <label>:[[ifLabel]]: 33; CHECK: store [[intType]] [[frameInt]], [[intType]]* @__sancov_lowest_stack 34; CHECK: %call = call i32 @foo() 35; CHECK: ret i32 %call 36 37 %call = call i32 @foo() 38 ret i32 %call 39} 40 41define weak_odr hidden i64* @_ZTW21__sancov_lowest_stack() { 42 ret i64* @__sancov_lowest_stack 43} 44