forked from OSchip/llvm-project
cc42df4a30
Summary: For a static object with a nontrivial destructor, clang generates an initializer function (__cxx_global_var_init) which registers that object's destructor using __cxa_atexit. However some ABIs (ARM, WebAssembly) use destructors that return 'this' instead of having void return (which does not match the signature of function pointers passed to __cxa_atexit). This results in undefined behavior when the destructors are called. All the calling conventions I know of on ARM can tolerate this, but WebAssembly requires the signatures of indirect calls to match the called function. This patch disables that direct registration of destructors for ABIs that have this-returning destructors. Subscribers: aemerson, jfb, cfe-commits, dschuff Differential Revision: http://reviews.llvm.org/D19275 llvm-svn: 269085 |
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