This patchset has been sitting in my dev branches for a while. I think it's time I post it for RFC.
Add callstack contexts for lttng-modules kernel tracer (callstack-user for user-space callstack, and callstack-kernel for kernel callstack). It currently rely on frame pointers for user-space callstacks, so it's normal that we cannot get stack trace for all applications for now. We may want to investigate using unwind information in those situations. This is a RFC patchset. There are currently no tests for this feature in lttng-tools. Feedback is welcome! Thanks, Mathieu Francis Giraldeau (3): Pass arguments for context size computation Define max nesting count constant Add kernel and user callstack contexts Mathieu Desnoyers (7): Cleanup callstack context callstack context: use delimiter when stack is incomplete Fix: callstack context: false-sharing, bad memory size allocation Fix callstack context: write empty sequence if no stack trace Cleanup callstack context Fix: callstack context alignment calculation callstack context: bump number of entries to 128 Makefile | 3 +- lib/ringbuffer/frontend.h | 3 + lib/ringbuffer/frontend_api.h | 2 +- lttng-abi.c | 3 + lttng-abi.h | 2 + lttng-context-callstack.c | 361 ++++++++++++++++++++++++++++++++++++++++++ lttng-events.h | 12 ++ lttng-ring-buffer-client.h | 17 +- 8 files changed, 396 insertions(+), 7 deletions(-) create mode 100644 lttng-context-callstack.c -- 2.1.4 _______________________________________________ lttng-dev mailing list [email protected] https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
