685c76d7a3
Summary: Second iteration of D56433 which got reverted in rL350719. The problem in the previous version was that we dropped the thunk calling the tsan init function. The new version keeps the thunk which should appease dyld, but is not actually OK wrt. the current semantics of function passes. Hence, add a helper to insert the functions only on the first time. The helper allows hooking into the insertion to be able to append them to the global ctors list. Reviewers: chandlerc, vitalybuka, fedor.sergeev, leonardchan Subscribers: hiraditya, bollu, llvm-commits Differential Revision: https://reviews.llvm.org/D56538 llvm-svn: 351314
83 lines
2.5 KiB
LLVM
83 lines
2.5 KiB
LLVM
; RUN: opt < %s -tsan -S | FileCheck %s
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; RUN: opt < %s -passes=tsan -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.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.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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; 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* @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* @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* @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: define internal void @tsan.module_ctor()
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; CHECK: call void @__tsan_init()
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