diff options
Diffstat (limited to 'lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h')
-rw-r--r-- | lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h index 465d05bf2c..3014b30773 100644 --- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h +++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h @@ -25,6 +25,7 @@ #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/Format.h" #include "llvm/Support/Host.h" +#include "llvm/Support/Mutex.h" #include "llvm/Support/SwapByteOrder.h" #include "llvm/Support/raw_ostream.h" #include "llvm/Support/system_error.h" @@ -186,6 +187,18 @@ protected: Triple::ArchType Arch; bool IsTargetLittleEndian; + // This mutex prevents simultaneously loading objects from two different + // threads. This keeps us from having to protect individual data structures + // and guarantees that section allocation requests to the memory manager + // won't be interleaved between modules. It is also used in mapSectionAddress + // and resolveRelocations to protect write access to internal data structures. + // + // loadObject may be called on the same thread during the handling of of + // processRelocations, and that's OK. The handling of the relocation lists + // is written in such a way as to work correctly if new elements are added to + // the end of the list while the list is being processed. + sys::Mutex lock; + virtual unsigned getMaxStubSize() = 0; virtual unsigned getStubAlignment() = 0; |