log/diag: Support diagnostic stacktraces on SIGSEGV #6200
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This commit adds support for enabling libunwind -- a library that can be used to display stack information. Use --enable-libunwind to check for availability. A diagnostic message is displayed if libunwind cannot be found as requested.
This commit adds an error code for the diagnostic code used for SIGSEGV diagnostic messages.
This commit adds a configuration setting to enable a stack trace message if Suricata receives a SIGSEGV.
This commit adds a signal handler for SIGSEGV when configured. The signal handler emits a one line stack trace using SCLogError. The intent is to provide diagnostic information in deployments where core files are not possible. The diagnostic message is from the offending thread and includes the stack trace; each frame includes the symbol + offset.
Codecov Report
@@ Coverage Diff @@
## master #6200 +/- ##
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Coverage 76.92% 76.92%
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Files 611 611
Lines 186204 186233 +29
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+ Hits 143236 143268 +32
+ Misses 42968 42965 -3
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Continued in #6201 |
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This PR supports configuring Suricata to emit a one-line diagnostic message containing a stacktrace when SIGSEGV occurs.
Requires
--enable-libunwindto configure supportlibunwindmust be available for configurationlogging.sigsegv-stacktrace)Link to redmine ticket: 4526
Describe changes:
#suricata-verify-pr:
#suricata-verify-repo:
#suricata-verify-branch:
#suricata-update-pr:
#suricata-update-repo:
#suricata-update-branch:
#libhtp-pr:
#libhtp-repo:
#libhtp-branch: