Add crash tracking to profiler #411
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* Make process_symbolization available * Remove `pprof` argurment (deduce address format from symbolizer) * Avoid passing a null pointer for symbolizer in unit tests
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Crash tracker installs signal handlers to catch crashes. Upon crash, it forks and execs another instance of ddprof passing it `--report-crash` argument as well as crashed thread tid as `--pid` and then waits for this other process to finish before re-raising the signal. Other ddprof process does a ptrace attach on its parent, unwind crashed thread and reports the crash through libdatadog crash tracker.
* Add `--report-crash` option * Install crash tracker upon profiler startup
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Benchmark results for collatzParameters
SummaryFound 0 performance improvements and 0 performance regressions! Performance is the same for 1 metrics, 0 unstable metrics. See unchanged results
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Benchmark results for BadBoggleSolver_runParameters
SummaryFound 0 performance improvements and 0 performance regressions! Performance is the same for 1 metrics, 0 unstable metrics. See unchanged results
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r1viollet
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May 31, 2024
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LGTM!
Looking forward to trying this out
r1viollet
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Mar 3, 2025
| int regno, void *arg) { | ||
| (void)dwfl; | ||
| return memory_read(addr, result, regno, arg); | ||
| auto *us = static_cast<UnwindState *>(arg); |
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why would we not have 2 separate unwinding configurations ?
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What does this PR do?
Add crash tracker and reporter to ddprof.
Crash tracker installs signal handlers to catch crashes in the profiler.
Upon crash, it forks and execs another instance of ddprof passing it
--report-crashargument as well as crashed thread tid as--pidand then waits for this other process to finish before re-raising the signal.Other ddprof process does a ptrace attach on its parent, unwind crashed thread and reports the crash through libdatadog crash tracker.