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Call CGM.SetLLVMFunctionAttributesForDefinition on thunks so that they get 

attributes like uwtable. Without uwtable a stack unwinder would be unable
to go past the thunks.

llvm-svn: 164411
This commit is contained in:
Rafael Espindola 2012-09-21 20:39:32 +00:00
parent 2efe53e448
commit 86792438dc
2 changed files with 19 additions and 2 deletions
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2
clang/lib/CodeGen/CGVTables.cpp
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@ -466,6 +466,8 @@ void CodeGenVTables::EmitThunk(GlobalDecl GD, const ThunkInfo &Thunk,
return;
}
CGM.SetLLVMFunctionAttributesForDefinition(GD.getDecl(), ThunkFn);
if (ThunkFn->isVarArg()) {
// Varargs thunks are special; we can't just generate a call because
// we can't copy the varargs. Our implementation is rather

19
clang/test/CodeGenCXX/thunks.cpp
View File

@ -1,5 +1,5 @@
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -fhidden-weak-vtables -emit-llvm -o - | FileCheck -check-prefix=HIDDEN %s
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -fhidden-weak-vtables -emit-llvm -o - | FileCheck -check-prefix=HIDDEN %s
namespace Test1 {
@ -327,6 +327,21 @@ namespace Test13 {
// CHECK: ret %"struct.Test13::D"*
}
namespace Test14 {
class A {
virtual void f();
};
class B {
virtual void f();
};
class C : public A, public B {
virtual void f();
};
void C::f() {
}
// CHECK: define void @_ZThn8_N6Test141C1fEv({{.*}}) {{.*}} uwtable
}
/**** The following has to go at the end of the file ****/
// This is from Test5: