When trying to perf inject JIT dump generatd through the perf plugin,
perf fails with the following error:
```
jitdump file contains invalid or unsupported flags 0xf5880666c26c
0x2b750 [0xa8]: failed to process type: 10 [Operation not permitted]
```
It turns out that Header's Flags field was never initialized, so the
value could be random.
This patch fixes the issue by initialising all Header's fields.
Co-authored-by: Lang Hames <lhames@gmail.com>
Also renames CWrapperFunctionResult to CWrapperFunctionBuffer.
These types are used as argument buffers, as well as result buffers. The
new name better reflects their purpose, and is consistent with naming in
the new ORC runtime (llvm-project/orc-rt).
/data/llvm-project/llvm/lib/ExecutionEngine/Orc/TargetProcess/JITLoaderPerf.cpp:118:10: error: variable 'Written' set but not used [-Werror,-Wunused-but-set-variable]
size_t Written = 0;
^
1 error generated.
This patch ports PerfJITEventListener to a JITLink plugin, but adds unwind
record support and drops debuginfo support temporarily. Debuginfo can be
enabled in the future by providing a way to obtain a DWARFContext from a
LinkGraph.
Reviewed By: lhames
Differential Revision: https://reviews.llvm.org/D146169
This patch ports PerfJITEventListener to a JITLink plugin, but adds unwind record support and drops debuginfo support temporarily. Debuginfo can be enabled in the future by providing a way to obtain a DWARFContext from a LinkGraph.
See D146060 for an experimental implementation that adds debuginfo parsing.
Reviewed By: lhames
Differential Revision: https://reviews.llvm.org/D146169
