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| author | Leonard Grey <lgrey@chromium.org> | 2022-09-07 13:21:09 -0400 |
|---|---|---|
| committer | Leonard Grey <lgrey@chromium.org> | 2022-09-14 16:46:40 -0400 |
| commit | ed2c3f46f5a74de9965c424a3a8ca99546b2c939 (patch) | |
| tree | ec466072a6fcb44bc222ce5e5aca338e7836cc1e /llvm/lib/CodeGen/MachineOperand.cpp | |
| parent | c69b26911168cdcf49c7c7162d7b44ce4ed40c37 (diff) | |
| download | llvm-ed2c3f46f5a74de9965c424a3a8ca99546b2c939.zip llvm-ed2c3f46f5a74de9965c424a3a8ca99546b2c939.tar.gz llvm-ed2c3f46f5a74de9965c424a3a8ca99546b2c939.tar.bz2 | |
[lsan][Darwin] Scan libdispatch and Foundation memory regions
libdispatch uses its own heap (_dispatch_main_heap) for some allocations, including the dispatch_continuation_t that holds a dispatch source's event handler.
Objective-C block trampolines (creating methods at runtime with a block as the implementations) use the VM_MEMORY_FOUNDATION region (see https://github.com/apple-oss-distributions/objc4/blob/8701d5672d3fd3cd817aeb84db1077aafe1a1604/runtime/objc-block-trampolines.mm#L371).
This change scans both regions to fix false positives. See tests for details; unfortunately I was unable to reduce the trampoline example with imp_implementationWithBlock on a new class, so I'm resorting to something close to the bug as seen in the wild.
Differential Revision: https://reviews.llvm.org/D129385
Diffstat (limited to 'llvm/lib/CodeGen/MachineOperand.cpp')
0 files changed, 0 insertions, 0 deletions