[lldb] Fix source line annotations for libsanitizers traces #11228
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When providing allocation and deallocation traces, the ASan compiler-rt runtime already provides call addresses (`TracePCType::Calls`). On Darwin, system sanitizers (libsanitizers) provides return address. It also discards a few non-user frames at the top of the stack, because these internal libmalloc/libsanitizers stack frames do not provide any value when diagnosing memory errors. Introduce and add handling for `TracePCType::ReturnsNoZerothFrame` to cover this case and enable libsanitizers traces line-level testing. rdar://157596927 (cherry picked from commit 484d040)
JDevlieghere
approved these changes
Aug 21, 2025
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@swift-ci Please test |
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Looks like an unrelated failure on Windows? Retry testing. |
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@swift-ci Please test windows |
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When providing allocation and deallocation traces, the ASan compiler-rt runtime already provides call addresses (
TracePCType::Calls).On Darwin, system sanitizers (libsanitizers)
provides return address. It also discards a few
non-user frames at the top of the stack, because
these internal libmalloc/libsanitizers stack
frames do not provide any value when diagnosing
memory errors.
Introduce and add handling for
TracePCType::ReturnsNoZerothFrameto cover thiscase and enable libsanitizers traces line-level
testing.
rdar://157596927
(cherry picked from commit 484d040)
llvm#154247