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| author | Etienne Bergeron <etienneb@google.com> | 2016-09-14 17:18:37 +0000 |
|---|---|---|
| committer | Etienne Bergeron <etienneb@google.com> | 2016-09-14 17:18:37 +0000 |
| commit | 752f8839a4eb3d00a8f788c15a4732484e9a957d (patch) | |
| tree | 0a9debdfcd21ce14d08105b9578f3f5b91ff944e /llvm/test/Instrumentation | |
| parent | a369219ce676ae960046ef00d6d23be2d10701ee (diff) | |
| download | bcm5719-llvm-752f8839a4eb3d00a8f788c15a4732484e9a957d.tar.gz bcm5719-llvm-752f8839a4eb3d00a8f788c15a4732484e9a957d.zip | |
[compiler-rt] Avoid instrumenting sanitizer functions
Summary:
Function __asan_default_options is called by __asan_init before the
shadow memory got initialized. Instrumenting that function may lead
to flaky execution.
As the __asan_default_options is provided by users, we cannot expect
them to add the appropriate function atttributes to avoid
instrumentation.
Reviewers: kcc, rnk
Subscribers: dberris, chrisha, llvm-commits
Differential Revision: https://reviews.llvm.org/D24566
llvm-svn: 281503
Diffstat (limited to 'llvm/test/Instrumentation')
| -rw-r--r-- | llvm/test/Instrumentation/AddressSanitizer/do-not-instrument-sanitizers.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/test/Instrumentation/AddressSanitizer/do-not-instrument-sanitizers.ll b/llvm/test/Instrumentation/AddressSanitizer/do-not-instrument-sanitizers.ll new file mode 100644 index 00000000000..fc263aad784 --- /dev/null +++ b/llvm/test/Instrumentation/AddressSanitizer/do-not-instrument-sanitizers.ll @@ -0,0 +1,24 @@ +; This test checks that we are not instrumenting sanitizer code. +; RUN: opt < %s -asan -asan-module -S | FileCheck %s + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; Function Attrs: nounwind uwtable +define void @__asan_default_options(i32* %a) sanitize_address { +entry: + %tmp1 = load i32, i32* %a, align 4 + %tmp2 = add i32 %tmp1, 1 + store i32 %tmp2, i32* %a, align 4 + ret void +} + +; CHECK-NOT: call void @__asan_report_load + +; Function Attrs: nounwind uwtable +define i32 @main() #0 { +entry: + ret i32 0 +} + +; CHECK: declare void @__asan_init()
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