i#5505 kernel trace: Add drpt2trace to decode PT traces

[dolanzhao]

Adds a PT raw traces decoding library and a command-line tool for testing it:

• Adds drpt2ir. It is a static library that can decode PT raw traces. The next PR will support converting PT raw traces to DynamoRIO's IR(instr_t).
• Adds drpt2trace. It is a command-line tool that invokes drpt2ir and is used to test drpt2ir's decoding APIs. The current version can decode the PT raw traces and count the number of instructions.
• Updates clients/drcachesim/CMakeLists.txt to support building drpt2ir and drpt2trace.
• Updates suite/tests/CMakeLists.txt to add a simple test for drpt2trace. The simple trace data is recorded by perf.

Issue: #5505

[derekbruening]

Normally you would get the tests green before requesting a review so the code isn't changing during review.

[derekbruening]

add to allowlist

[derekbruening]

Normally you would get the tests green before requesting a review so the code isn't changing during review.

To my point, a new commit came in while I was looking at the diff...please re-request review when ready.

[dolanzhao]

Normally you would get the tests green before requesting a review so the code isn't changing during review.

To my point, a new commit came in while I was looking at the diff...please re-request review when ready.

Sorry for that. I will re-request review when the clang-format cl is pass.

[derekbruening]

Sorry for that. I will re-request review when the clang-format cl is pass.

I would suggest installing clang-format locally in your dev env.

[dolanzhao]

Sorry for that. I will re-request review when the clang-format cl is pass.

I would suggest installing clang-format locally in your dev env.

I installed it. But I think I met an issue about clang-format. The issue is I add links in comment and wrap them with "clang-format off" and "clang format on". The clang-format check still failed. Do you know how to fix it?

/* Why we need to handle pending perf events?*/
/* clang-format off */
/* https://github.com/intel/libipt/blob/c848a85c3104e2f5780741f85de5c9e65476ece2/doc/man/pt_insn_next.3.md?plain=1#L207-L234 */
/* clang-format on */

[dolanzhao]

Update:
For offline decoding, if the trace data is not generated in the decoding machine, we need to provide the program's images to the decoder. So we need to add image files for the simple test case. And the sideband file only contains image mmap information and can be used when the tracer and decoder are working on the same machine. So I remove it.

• Add three image files: hello, ld-2.33.so and libc-2.33.so
• Remove the sideband file.

Issue: 5505