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Make PrettyStackTraceEntry use ManagedStatic for its ThreadLocal.

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This was somewhat tricky because ~PrettyStackTraceEntry() may run after 
llvm_shutdown() has been called. This is rare and only happens for a common idiom 
used in the main() functions of command-line tools. This works around the idiom by 
skipping the stack clean-up if the PrettyStackTraceHead ManagedStatic is not 
constructed (i.e. llvm_shutdown() has been called).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190730 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filip Pizlo
2013-09-13 22:59:47 +00:00
parent 98bae99266
commit e94e0984df
2 changed files with 20 additions and 9 deletions
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include/llvm/Support/ManagedStatic.h
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@@ -99,7 +99,6 @@ public:
/// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
void llvm_shutdown();
/// llvm_shutdown_obj - This is a simple helper class that calls
/// llvm_shutdown() when it is destroyed.
struct llvm_shutdown_obj {