[cfe-dev] Valgrind; clang::ASTUnit::Parse -> lost memory?

[Doug]

Humm, when I run valgrind over my code I'm getting:

==30376==
==30376== HEAP SUMMARY:
==30376==     in use at exit: 1,928 bytes in 25 blocks
==30376==   total heap usage: 28,193 allocs, 28,168 frees, 2,194,616 bytes
allocated
==30376==
==30376== 1,864 (1,056 direct, 808 indirect) bytes in 1 blocks are
definitely lost in loss record 15 of 15
==30376==    at 0x4C28973: operator new(unsigned long)
(vg_replace_malloc.c:261)
==30376==    by 0x57C7A62: clang::ASTUnit::Parse(llvm::MemoryBuffer*) (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x57CB686: clang::ASTUnit::LoadFromCompilerInvocation(bool)
(in /home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x57CBF0F: clang::ASTUnit::LoadFromCommandLine(char
const**, char const**, llvm::IntrusiveRefCntPtr<clang::DiagnosticsEngine>,
llvm::StringRef, bool, bool, std::pair<std::string, llvm::PointerUnion<char
const*, llvm::MemoryBuffer const*> >*, unsigned int, bool, bool,
clang::TranslationUnitKind, bool, bool) (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x54F5E14: clang_parseTranslationUnit_Impl (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x5E3BD89: llvm::CrashRecoveryContext::RunSafely(void
(*)(void*), void*) (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x5E3BE90: RunSafelyOnThread_Dispatch(void*) (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x5E72924: ExecuteOnThread_Dispatch(void*) (in
/home/doug/projects/cparse/deps/llvm/build/lib/liblibclang.so.3.0)
==30376==    by 0x6D82970: start_thread (pthread_create.c:304)
==30376==    by 0x68DA92C: clone (clone.S:112)
==30376==
==30376== LEAK SUMMARY:
==30376==    definitely lost: 1,056 bytes in 1 blocks

I'm a little lost as to if this is something I'm doing wrong on my code, or
some kind of clang internal thing (seems internal, but I wouldnt have
expected clang to leak memory, so I suspect perhaps I'm not cleaning up
correctly after use?).

Any suggestions how to track this down?

My code is roughly like:

clang_createIndex(...);
clang_createTranslationUnitFromSourceFile(...);
clang_getTranslationUnitCursor(...);
clang_visitChildren(...);
clang_disposeTranslationUnit(...);
clang_disposeIndex(...);

Is there some other shutdown I need to run?

~
Doug.
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