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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2013-09-19 15:22:35 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2013-09-19 15:22:35 +0000 |
| commit | 6591308b7e041bb8e5e211f84bcc4a97d3764cc5 (patch) | |
| tree | d60a58ca196056d63ec0a41701c7643b979cca3b /test/Instrumentation | |
| parent | 530d09a22bd2f5c638ae1932bed560c8a46e399e (diff) | |
| download | external_llvm-6591308b7e041bb8e5e211f84bcc4a97d3764cc5.zip external_llvm-6591308b7e041bb8e5e211f84bcc4a97d3764cc5.tar.gz external_llvm-6591308b7e041bb8e5e211f84bcc4a97d3764cc5.tar.bz2 | |
[msan] Wrap indirect functions.
Adds a flag to the MemorySanitizer pass that enables runtime rewriting of
indirect calls. This is part of MSanDR implementation and is needed to return
control to the DynamiRio-based helper tool on transition between instrumented
and non-instrumented modules. Disabled by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191006 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Instrumentation')
| -rw-r--r-- | test/Instrumentation/MemorySanitizer/wrap_indirect_calls.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Instrumentation/MemorySanitizer/wrap_indirect_calls.ll b/test/Instrumentation/MemorySanitizer/wrap_indirect_calls.ll new file mode 100644 index 0000000..f847019 --- /dev/null +++ b/test/Instrumentation/MemorySanitizer/wrap_indirect_calls.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -msan -msan-check-access-address=0 -msan-wrap-indirect-calls=zzz -S | FileCheck %s +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; Test for -msan-wrap-indirect-calls functionality. +; Replaces indirect call to %f with a call to whatever is returned from the +; wrapper function. + +; This does not depend on the sanitize_memory attribute. +define i32 @func(i32 (i32, i32)* nocapture %f, i32 %x, i32 %y) { +entry: + %call = tail call i32 %f(i32 %x, i32 %y) + ret i32 %call +} + +; CHECK: @func +; CHECK: bitcast i32 (i32, i32)* %f to void ()* +; CHECK: call void ()* (void ()*)* @zzz(void ()* +; CHECK: [[A:%[01-9a-z]+]] = bitcast void ()* {{.*}} to i32 (i32, i32)* +; CHECK: call i32 {{.*}}[[A]](i32 {{.*}}, i32 {{.*}}) +; CHECK: ret i32 |