b4257d3bf5
After https://reviews.llvm.org/rG463aa814182a23 tsan replaces llvm intrinsics with calls to glibc functions. However this approach is fragile, as slight changes in pipeline can return llvm intrinsics back. In particular InstCombine can do that. Msan/Asan already declare own version of these memory functions for the similar purpose. KCSAN, or anything that uses something else than compiler-rt, needs to implement this callbacks. Reviewed By: melver Differential Revision: https://reviews.llvm.org/D133268
116 lines
3.6 KiB
LLVM
116 lines
3.6 KiB
LLVM
; RUN: opt < %s -passes='function(tsan),module(tsan-module)' -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"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @read_4_bytes(i32* %a) sanitize_thread {
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entry:
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%tmp1 = load i32, i32* %a, align 4
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ret i32 %tmp1
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}
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; CHECK: @llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @tsan.module_ctor to i8*)]
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; CHECK: @llvm.global_ctors = {{.*}}@tsan.module_ctor
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; CHECK: define i32 @read_4_bytes(i32* %a)
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; CHECK: call void @__tsan_func_entry(i8* %0)
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; CHECK-NEXT: %1 = bitcast i32* %a to i8*
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; CHECK-NEXT: call void @__tsan_read4(i8* %1)
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; CHECK-NEXT: %tmp1 = load i32, i32* %a, align 4
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; CHECK-NEXT: call void @__tsan_func_exit()
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; CHECK: ret i32
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
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declare void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
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declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
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declare void @llvm.memset.inline.p0i8.i64(i8* nocapture, i8, i64, i1)
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; Check that tsan converts mem intrinsics back to function calls.
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define void @MemCpyTest(i8* nocapture %x, i8* nocapture %y) sanitize_thread {
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entry:
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
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ret void
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; CHECK: define void @MemCpyTest
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; CHECK: call i8* @__tsan_memcpy
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; CHECK: ret void
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}
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define void @MemCpyInlineTest(i8* nocapture %x, i8* nocapture %y) sanitize_thread {
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entry:
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tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
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ret void
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; CHECK: define void @MemCpyInlineTest
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; CHECK: call i8* @__tsan_memcpy
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; CHECK: ret void
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}
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define void @MemMoveTest(i8* nocapture %x, i8* nocapture %y) sanitize_thread {
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entry:
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tail call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
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ret void
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; CHECK: define void @MemMoveTest
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; CHECK: call i8* @__tsan_memmove
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; CHECK: ret void
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}
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define void @MemSetTest(i8* nocapture %x) sanitize_thread {
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entry:
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tail call void @llvm.memset.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
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ret void
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; CHECK: define void @MemSetTest
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; CHECK: call i8* @__tsan_memset
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; CHECK: ret void
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}
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define void @MemSetInlineTest(i8* nocapture %x) sanitize_thread {
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entry:
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tail call void @llvm.memset.inline.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
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ret void
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; CHECK: define void @MemSetInlineTest
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; CHECK: call i8* @__tsan_memset
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; CHECK: ret void
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}
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; CHECK-LABEL: @SwiftError
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; CHECK-NOT: __tsan_read
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; CHECK-NOT: __tsan_write
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; CHECK: ret
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define void @SwiftError(i8** swifterror) sanitize_thread {
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%swifterror_ptr_value = load i8*, i8** %0
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store i8* null, i8** %0
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%swifterror_addr = alloca swifterror i8*
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%swifterror_ptr_value_2 = load i8*, i8** %swifterror_addr
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store i8* null, i8** %swifterror_addr
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ret void
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}
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; CHECK-LABEL: @SwiftErrorCall
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; CHECK-NOT: __tsan_read
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; CHECK-NOT: __tsan_write
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; CHECK: ret
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define void @SwiftErrorCall(i8** swifterror) sanitize_thread {
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%swifterror_addr = alloca swifterror i8*
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store i8* null, i8** %0
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call void @SwiftError(i8** %0)
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ret void
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}
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; CHECK-LABEL: @NakedTest(i32* %a)
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: %tmp1 = load i32, i32* %a, align 4
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; CHECK-NEXT: ret i32 %tmp1
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define i32 @NakedTest(i32* %a) naked sanitize_thread {
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call void @foo()
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%tmp1 = load i32, i32* %a, align 4
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ret i32 %tmp1
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}
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declare void @foo() nounwind
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; CHECK: define internal void @tsan.module_ctor()
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; CHECK: call void @__tsan_init()
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