6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-26 05:32:25 +00:00
Code Issues Projects Releases Wiki Activity

tsan: implement no_sanitize_thread attribute

Browse Source 
If a function has no_sanitize_thread attribute,
do not instrument memory accesses in it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192871 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dmitry Vyukov 2013-10-17 07:20:06 +00:00
parent 49af380e3b
commit 4ef1999d61
7 changed files with 47 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Transforms/Instrumentation/ThreadSanitizer.cpp
View File

@ -358,7 +358,7 @@ bool ThreadSanitizer::runOnFunction(Function &F) {
// (e.g. variables that do not escape, etc).
// Instrument memory accesses.
if (ClInstrumentMemoryAccesses)
if (ClInstrumentMemoryAccesses && F.hasFnAttribute(Attribute::SanitizeThread))
for (size_t i = 0, n = AllLoadsAndStores.size(); i < n; ++i) {
Res |= instrumentLoadOrStore(AllLoadsAndStores[i]);
}

36
test/Instrumentation/ThreadSanitizer/no_sanitize_thread.ll Normal file
View File

@ -0,0 +1,36 @@
; RUN: opt < %s -tsan -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"
target triple = "x86_64-unknown-linux-gnu"
; no sanitize_thread attribute here
define i32 @read_4_bytes(i32* %a) {
entry:
%tmp1 = load i32* %a, align 4
ret i32 %tmp1
}
; CHECK: define i32 @read_4_bytes(i32* %a) {
; CHECK-NEXT: entry:
; CHECK-NEXT: %tmp1 = load i32* %a, align 4
; CHECK: ret i32 %tmp1
; no sanitize_thread attribute here
define i32 @read_4_bytes_and_call(i32* %a) {
entry:
call void @foo()
%tmp1 = load i32* %a, align 4
ret i32 %tmp1
}
; CHECK: define i32 @read_4_bytes_and_call(i32* %a) {
; CHECK-NEXT: entry:
; CHECK-NEXT: %0 = call i8* @llvm.returnaddress(i32 0)
; CHECK-NEXT: call void @__tsan_func_entry(i8* %0)
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: %tmp1 = load i32* %a, align 4
; CHECK-NEXT: call void @__tsan_func_exit()
; CHECK-NEXT: ret i32 %tmp1
declare void @foo()

4
test/Instrumentation/ThreadSanitizer/read_before_write.ll
View File

@ -2,7 +2,7 @@
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"
define void @IncrementMe(i32* nocapture %ptr) nounwind uwtable {
define void @IncrementMe(i32* nocapture %ptr) nounwind uwtable sanitize_thread {
entry:
%0 = load i32* %ptr, align 4
%inc = add nsw i32 %0, 1
@ -14,7 +14,7 @@ entry:
; CHECK: __tsan_write
; CHECK: ret void
define void @IncrementMeWithCallInBetween(i32* nocapture %ptr) nounwind uwtable {
define void @IncrementMeWithCallInBetween(i32* nocapture %ptr) nounwind uwtable sanitize_thread {
entry:
%0 = load i32* %ptr, align 4
%inc = add nsw i32 %0, 1

8
test/Instrumentation/ThreadSanitizer/read_from_global.ll
View File

@ -4,7 +4,7 @@
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"
@const_global = external constant i32
define i32 @read_from_const_global() nounwind uwtable readnone {
define i32 @read_from_const_global() nounwind uwtable sanitize_thread readnone {
entry:
%0 = load i32* @const_global, align 4
ret i32 %0
@ -14,7 +14,7 @@ entry:
; CHECK: ret i32
@non_const_global = global i32 0, align 4
define i32 @read_from_non_const_global() nounwind uwtable readonly {
define i32 @read_from_non_const_global() nounwind uwtable sanitize_thread readonly {
entry:
%0 = load i32* @non_const_global, align 4
ret i32 %0
@ -25,7 +25,7 @@ entry:
; CHECK: ret i32
@const_global_array = external constant [10 x i32]
define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable readnone {
define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable sanitize_thread readnone {
entry:
%idxprom = sext i32 %idx to i64
%arrayidx = getelementptr inbounds [10 x i32]* @const_global_array, i64 0, i64 %idxprom
@ -38,7 +38,7 @@ entry:
; CHECK: ret i32
%struct.Foo = type { i32 (...)** }
define void @call_virtual_func(%struct.Foo* %f) uwtable {
define void @call_virtual_func(%struct.Foo* %f) uwtable sanitize_thread {
entry:
%0 = bitcast %struct.Foo* %f to void (%struct.Foo*)***
%vtable = load void (%struct.Foo*)*** %0, align 8, !tbaa !2

4
test/Instrumentation/ThreadSanitizer/tsan_basic.ll
View File

@ -3,7 +3,7 @@
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"
target triple = "x86_64-unknown-linux-gnu"
define i32 @read_4_bytes(i32* %a) {
define i32 @read_4_bytes(i32* %a) sanitize_thread {
entry:
%tmp1 = load i32* %a, align 4
ret i32 %tmp1
@ -11,7 +11,7 @@ entry:
; CHECK: @llvm.global_ctors = {{.*}}@__tsan_init
; CHECK: define i32 @read_4_bytes(i32* %a) {
; CHECK: define i32 @read_4_bytes(i32* %a)
; CHECK: call void @__tsan_func_entry(i8* %0)
; CHECK-NEXT: %1 = bitcast i32* %a to i8*
; CHECK-NEXT: call void @__tsan_read4(i8* %1)

2
test/Instrumentation/ThreadSanitizer/vptr_read.ll
View File

@ -2,7 +2,7 @@
; Check that vptr reads are treated in a special way.
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"
define i8 @Foo(i8* %a) nounwind uwtable {
define i8 @Foo(i8* %a) nounwind uwtable sanitize_thread {
entry:
; CHECK: call void @__tsan_vptr_read
%0 = load i8* %a, align 8, !tbaa !0

2
test/Instrumentation/ThreadSanitizer/vptr_update.ll
View File

@ -2,7 +2,7 @@
; Check that vtable pointer updates are treated in a special way.
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"
define void @Foo(i8** nocapture %a, i8* %b) nounwind uwtable {
define void @Foo(i8** nocapture %a, i8* %b) nounwind uwtable sanitize_thread {
entry:
; CHECK: call void @__tsan_vptr_update
store i8* %b, i8** %a, align 8, !tbaa !0