support symbol resolution of short-lived process. #2144
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Added build_id support for BPF stackmap. A separate build_id stackmap can be created with the help of new macro BPF_STACK_TRACE_BUILDID The kernel BPF reports stacktrace in the structure bpf_stack_build_id. Changes have been made to BPF modules to support resolving symbols mentioned in the above format. An example tool is also available in tools/stack_buildid_example.py
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@brendangregg Now bcc core has stackmap buildid support. This patch tries to amend |
Updated the man file. |
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[buildbot, test this please] |
New command line options have been added to tools/trace.py to support the new BUILD_ID stackmap. List of symbol files can be added to the script to resolve symbols from build id as reported by the kernel in the stack trace Updated man page and added an example usage
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Please note that test bed failures are not due to this change. |
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[buildbot, test this please] |
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Thanks. The change looks good to me. |
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* master: (609 commits) docs: references_guide.md: add/fix search examples/tools links (iovisor#2186) Fix misc file permissions (iovisor#2185) sync with latest bpf (iovisor#2184) sync with latest libbpf repo (iovisor#2183) docs: fix broken link of bpf_log2l(iovisor#2176) examples/tracing: some minor fixes Fix tools/syscount -l (iovisor#2180) examples/tracing/bitehist.py: add example of linear histogram (iovisor#2177) cachestat: bring back HITRATIO column Fix debuginfo search on Ubuntu Add installation instructions for Amazon Linux 1 AMI Sign-Off-By Travis Davies <trdavies@amazon.com> [iovisor/bcc] trace: Incorrect symbol offsets when using build_id (iovisor#2161) (iovisor#2162) profile: exclude CPU idle stacks by default (iovisor#2166) fix cpuunclaimed.py with cfs_rq structure change (iovisor#2164) tools: rename "deadlock_detector" to "deadlock" (iovisor#2152) (iovisor#2160) use libbpf api in bpf_attach_xdp (iovisor#2158) support symbol resolution of short-lived process. (iovisor#2144) profile.py: return kernel annotations for folded stacks use libbpf APIs from libbpf.c (iovisor#2156) ddos_detector.py to monitor DDOS attacks (iovisor#2140) ...
palexster
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New command line options have been added to tools/trace.py to support the new BUILD_ID stackmap. List of symbol files can be added to the script to resolve symbols from build id as reported by the kernel in the stack trace Updated man page and added an example usage
CrackerCat
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New command line options have been added to tools/trace.py to support the new BUILD_ID stackmap. List of symbol files can be added to the script to resolve symbols from build id as reported by the kernel in the stack trace Updated man page and added an example usage
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Support symbol resolution for short-lived processes (#2014)
New command line options have been added to tools/trace.py to support the new BUILD_ID stackmap. List of symbol files can be added to the script to resolve symbols from build id as reported by the kernel in the stack trace. A comma separated list of symbol files can be passed to the script as shown below.
Eg invocation to trace inet_pton(as mentioned in #2014)
python tools/trace.py -s /lib/x86_64-linux-gnu/libc.so.6,/bin/ping 'p:c:inet_pton' -U