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fall back to explicit list of allowed linkages when instrumenting globals in asan; add a test check that asan does not touch linkonce_odr

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144933 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany
2011-11-17 23:14:59 +00:00
parent f249449539
commit 7cf2a04361
2 changed files with 11 additions and 2 deletions
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7
lib/Transforms/Instrumentation/AddressSanitizer.cpp
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@@ -448,8 +448,11 @@ bool AddressSanitizer::insertGlobalRedzones(Module &M) {
if (!Ty->isSized()) continue;
if (!G->hasInitializer()) continue;
if (GlobalVariable::mayBeOverridden(G->getLinkage()) ||
G->getLinkage() == GlobalVariable::AppendingLinkage)
// Touch only those globals that will not be defined in other modules.
// Don't handle ODR type linkages since other modules may be built w/o asan.
if (G->getLinkage() != GlobalVariable::GlobalVariable::ExternalLinkage &&
G->getLinkage() != GlobalVariable::GlobalVariable::PrivateLinkage &&
G->getLinkage() != GlobalVariable::GlobalVariable::InternalLinkage)
continue;
// For now, just ignore this Alloca if the alignment is large.
if (G->getAlignment() > RedzoneSize) continue;