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https://github.com/c64scene-ar/llvm-6502.git
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Initial commit of MemorySanitizer.
Compiler pass only. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168866 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov
parent
8b390ffbfd
commit
aa4f97d6ed
@ -111,6 +111,7 @@ void initializePathProfilerPass(PassRegistry&);
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void initializeGCOVProfilerPass(PassRegistry&);
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void initializeAddressSanitizerPass(PassRegistry&);
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void initializeAddressSanitizerModulePass(PassRegistry&);
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void initializeMemorySanitizerPass(PassRegistry&);
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void initializeThreadSanitizerPass(PassRegistry&);
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void initializeEarlyCSEPass(PassRegistry&);
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void initializeExpandISelPseudosPass(PassRegistry&);
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@ -36,6 +36,8 @@ ModulePass *createGCOVProfilerPass(bool EmitNotes = true, bool EmitData = true,
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// Insert AddressSanitizer (address sanity checking) instrumentation
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FunctionPass *createAddressSanitizerFunctionPass();
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ModulePass *createAddressSanitizerModulePass();
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// Insert MemorySanitizer instrumentation (detection of uninitialized reads)
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FunctionPass *createMemorySanitizerPass();
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// Insert ThreadSanitizer (race detection) instrumentation
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FunctionPass *createThreadSanitizerPass();
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@ -4,6 +4,7 @@ add_llvm_library(LLVMInstrumentation
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BoundsChecking.cpp
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EdgeProfiling.cpp
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GCOVProfiling.cpp
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MemorySanitizer.cpp
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Instrumentation.cpp
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OptimalEdgeProfiling.cpp
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PathProfiling.cpp
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@ -27,6 +27,7 @@ void llvm::initializeInstrumentation(PassRegistry &Registry) {
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initializeGCOVProfilerPass(Registry);
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initializeOptimalEdgeProfilerPass(Registry);
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initializePathProfilerPass(Registry);
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initializeMemorySanitizerPass(Registry);
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initializeThreadSanitizerPass(Registry);
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}
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1419
lib/Transforms/Instrumentation/MemorySanitizer.cpp
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1419
lib/Transforms/Instrumentation/MemorySanitizer.cpp
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File diff suppressed because it is too large
Load Diff
1
test/Instrumentation/MemorySanitizer/lit.local.cfg
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1
test/Instrumentation/MemorySanitizer/lit.local.cfg
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@ -0,0 +1 @@
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config.suffixes = ['.ll', '.c', '.cpp']
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235
test/Instrumentation/MemorySanitizer/msan_basic.ll
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235
test/Instrumentation/MemorySanitizer/msan_basic.ll
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@ -0,0 +1,235 @@
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; RUN: opt < %s -msan -S | FileCheck %s
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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"
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; Check the presence of __msan_init
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; CHECK: @llvm.global_ctors {{.*}} @__msan_init
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; load followed by cmp: check that we load the shadow and call __msan_warning.
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define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable {
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entry:
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%0 = load i32* %a, align 4
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%tobool = icmp eq i32 %0, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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tail call void (...)* @foo() nounwind
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br label %if.end
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if.end: ; preds = %entry, %if.then
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ret void
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}
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declare void @foo(...)
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; CHECK: define void @LoadAndCmp
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; CHECK: = load
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; CHECK: = load
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; CHECK: call void @__msan_warning_noreturn()
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; CHECK: }
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; Check that we store the shadow for the retval.
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define i32 @ReturnInt() nounwind uwtable readnone {
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entry:
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ret i32 123
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}
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; CHECK: define i32 @ReturnInt()
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; CHECK: store i32 0,{{.*}}__msan_retval_tls
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; CHECK: }
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; Check that we get the shadow for the retval.
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define void @CopyRetVal(i32* nocapture %a) nounwind uwtable {
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entry:
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%call = tail call i32 @ReturnInt() nounwind
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store i32 %call, i32* %a, align 4
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ret void
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}
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; CHECK: define void @CopyRetVal
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; CHECK: load{{.*}}__msan_retval_tls
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; CHECK: store
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; CHECK: store
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; CHECK: }
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; Check that we generate PHIs for shadow.
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define void @FuncWithPhi(i32* nocapture %a, i32* %b, i32* nocapture %c) nounwind uwtable {
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entry:
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%tobool = icmp eq i32* %b, null
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br i1 %tobool, label %if.else, label %if.then
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if.then: ; preds = %entry
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%0 = load i32* %b, align 4
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br label %if.end
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if.else: ; preds = %entry
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%1 = load i32* %c, align 4
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%t.0 = phi i32 [ %0, %if.then ], [ %1, %if.else ]
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store i32 %t.0, i32* %a, align 4
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ret void
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}
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; CHECK: define void @FuncWithPhi
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; CHECK: = phi
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; CHECK-NEXT: = phi
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; CHECK: store
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; CHECK: store
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; CHECK: }
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; Compute shadow for "x << 10"
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define void @ShlConst(i32* nocapture %x) nounwind uwtable {
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entry:
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%0 = load i32* %x, align 4
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%1 = shl i32 %0, 10
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store i32 %1, i32* %x, align 4
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ret void
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}
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; CHECK: define void @ShlConst
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; CHECK: = load
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; CHECK: = load
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; CHECK: shl
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; CHECK: shl
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; CHECK: store
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; CHECK: store
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; CHECK: }
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; Compute shadow for "10 << x": it should have 'sext i1'.
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define void @ShlNonConst(i32* nocapture %x) nounwind uwtable {
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entry:
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%0 = load i32* %x, align 4
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%1 = shl i32 10, %0
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store i32 %1, i32* %x, align 4
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ret void
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}
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; CHECK: define void @ShlNonConst
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; CHECK: = load
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; CHECK: = load
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; CHECK: = sext i1
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; CHECK: store
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; CHECK: store
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; CHECK: }
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; SExt
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define void @SExt(i32* nocapture %a, i16* nocapture %b) nounwind uwtable {
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entry:
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%0 = load i16* %b, align 2
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%1 = sext i16 %0 to i32
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store i32 %1, i32* %a, align 4
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ret void
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}
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; CHECK: define void @SExt
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; CHECK: = load
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; CHECK: = load
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; CHECK: = sext
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; CHECK: = sext
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; CHECK: store
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; CHECK: store
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; CHECK: }
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; memset
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define void @MemSet(i8* nocapture %x) nounwind uwtable {
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entry:
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call void @llvm.memset.p0i8.i64(i8* %x, i8 42, i64 10, i32 1, i1 false)
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ret void
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}
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
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; CHECK: define void @MemSet
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; CHECK: call void @llvm.memset.p0i8.i64
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; CHECK: call void @llvm.memset.p0i8.i64
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; CHECK: }
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; memcpy
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define void @MemCpy(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
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entry:
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
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ret void
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
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; CHECK: define void @MemCpy
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
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; CHECK: }
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; memmove is lowered to a call
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define void @MemMove(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
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entry:
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call void @llvm.memmove.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
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ret void
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}
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declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
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; CHECK: define void @MemMove
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; CHECK: call i8* @memmove
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; CHECK: }
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; Check that we propagate shadow for "select"
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define i32 @Select(i32 %a, i32 %b, i32 %c) nounwind uwtable readnone {
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entry:
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%tobool = icmp ne i32 %c, 0
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%cond = select i1 %tobool, i32 %a, i32 %b
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ret i32 %cond
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}
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; CHECK: define i32 @Select
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; CHECK: select
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; CHECK-NEXT: select
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; CHECK: }
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define i8* @IntToPtr(i64 %x) nounwind uwtable readnone {
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entry:
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%0 = inttoptr i64 %x to i8*
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ret i8* %0
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}
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; CHECK: define i8* @IntToPtr
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; CHECK: load i64*{{.*}}__msan_param_tls
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; CHECK-NEXT: inttoptr
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; CHECK-NEXT: store i64{{.*}}__msan_retval_tls
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; CHECK: }
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define i8* @IntToPtr_ZExt(i16 %x) nounwind uwtable readnone {
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entry:
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%0 = inttoptr i16 %x to i8*
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ret i8* %0
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}
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; CHECK: define i8* @IntToPtr_ZExt
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; CHECK: zext
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; CHECK-NEXT: inttoptr
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; CHECK: }
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; Check that we insert exactly one check on udiv
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; (2nd arg shadow is checked, 1st arg shadow is propagated)
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define i32 @Div(i32 %a, i32 %b) nounwind uwtable readnone {
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entry:
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%div = udiv i32 %a, %b
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ret i32 %div
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}
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; CHECK: define i32 @Div
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; CHECK: icmp
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; CHECK: br
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; CHECK-NOT: icmp
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; CHECK: udiv
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; CHECK-NOT: icmp
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; CHECK: }
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