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65df098609
Summary: Keeping msan a function pass requires replacing the module level initialization: That means, don't define a ctor function which calls __msan_init, instead just declare the init function at the first access, and add that to the global ctors list. Changes: - Pull the actual sanitizer and the wrapper pass apart. - Add a newpm msan pass. The function pass inserts calls to runtime library functions, for which it inserts declarations as necessary. - Update tests. Caveats: - There is one test that I dropped, because it specifically tested the definition of the ctor. Reviewers: chandlerc, fedor.sergeev, leonardchan, vitalybuka Subscribers: sdardis, nemanjai, javed.absar, hiraditya, kbarton, bollu, atanasyan, jsji Differential Revision: https://reviews.llvm.org/D55647 llvm-svn: 350305
51 lines
1.5 KiB
LLVM
51 lines
1.5 KiB
LLVM
; Verify that calls with !nosanitize are not instrumented by MSan.
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; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
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; RUN: opt < %s -msan -S | FileCheck %s
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; RUN: opt < %s -msan-track-origins=1 -S -passes=msan 2>&1 | FileCheck %s
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; RUN: opt < %s -msan -msan-track-origins=1 -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @bar(i32 %x)
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define void @foo() {
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call void @bar(i32 7), !nosanitize !{}
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ret void
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}
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; CHECK-LABEL: define void @foo
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; CHECK-NOT: store {{.*}} @__msan_param_tls
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; CHECK: call void @bar
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; CHECK: ret void
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@__sancov_gen_ = private global [1 x i8] zeroinitializer, section "__sancov_cntrs", align 1
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define void @sancov() sanitize_memory {
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entry:
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%0 = load i8, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @__sancov_gen_, i64 0, i64 0), !nosanitize !{}
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%1 = add i8 %0, 1
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store i8 %1, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @__sancov_gen_, i64 0, i64 0), !nosanitize !{}
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ret void
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}
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; CHECK-LABEL: define void @sancov
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; CHECK-NOT: xor
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; CHECK-NOT: 87960930222080
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; CHECK: ret void
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define void @load_store() sanitize_memory {
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entry:
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%x = alloca i32, align 4, !nosanitize !{}
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store i32 4, i32* %x, align 4, !nosanitize !{}
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%0 = load i32, i32* %x, align 4, !nosanitize !{}
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%add = add nsw i32 %0, %0
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store i32 %add, i32* %x, align 4, !nosanitize !{}
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ret void
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}
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; CHECK-LABEL: define void @load_store
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; CHECK-NOT: xor
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; CHECK-NOT: 87960930222080
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; CHECK: ret void
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