main: generate coredump and exit upon SIGABRT received
Previous code relied on abort() switching sigaction to SIG_FDL + retriggering SIGABRT in case the signal handler returns, which would then generate the coredump + terminate the process. However, if a SIGABRT is received from somewhere else (killall -SIGABRT retriggering SIGABRT in case the signal handler returns, which would then generate the coredump + terminate the process. However, if a SIGABRT is received from somewhere else (kill -SIGABRT), then the process would print the talloc report and continue running, which is not desired. Fixes: OS#4865 Change-Id: I3caa78e6ce7c9a98b0a26fde61468bd7b38c6fd9
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@ -198,8 +198,16 @@ static void signal_handler(int signal)
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{
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{
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switch (signal) {
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switch (signal) {
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case SIGABRT:
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case SIGABRT:
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/* in case of abort, we want to obtain a talloc report
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/* in case of abort, we want to obtain a talloc report and
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* and then return to the caller, who will abort the process */
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* then run default SIGABRT handler, who will generate coredump
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* and abort the process. abort() should do this for us after we
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* return, but program wouldn't exit if an external SIGABRT is
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* received.
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*/
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talloc_report_full(g_tall_ctx, stderr);
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signal(SIGABRT, SIG_DFL);
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raise(SIGABRT);
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break;
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case SIGUSR1:
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case SIGUSR1:
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talloc_report_full(g_tall_ctx, stderr);
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talloc_report_full(g_tall_ctx, stderr);
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break;
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break;
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