<html>
<head>
<meta name="viewport" content="width=device-width" />
<base href="https://wiki.asterisk.org/wiki" />
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small, small a { -webkit-text-size-adjust: 90%; }
td[id=email-wrapper-inner] { padding: 2px !important; }
td[id=email-content-inner] { padding: 8px !important; }
td[id="email-wrapper-inner"][class="thin"] > table { text-align: left !important; width: 100% !important; }
td[id=email-footer] { padding: 8px 12px !important; }
div[class=email-indent] { margin: 8px 0px !important; }
div[class=email-comment] { margin: 0 !important; }
p[id=email-title-flavor] a { display: block; } /* puts the username and the action on separate lines */
p[id=email-permalink] { padding: 4px 0 0 0 !important; }
table[id=email-actions] td { padding-top: 0 !important; }
table[id=email-actions] td.right { text-align: right !important; }
table[id=email-actions] .email-list-item { display: block; margin: 1em 0 !important; word-wrap: normal !important; }
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<body style="font-family: Arial, FreeSans, Helvetica, sans-serif; font-size: 13px; width: 100%; -webkit-font-smoothing: antialiased; background-color: #f0f0f0">
<table id="email-wrapper" width="100%" cellspacing="0" cellpadding="0" border="0" style="background-color: #f0f0f0">
<tbody>
<tr valign="middle">
<td id="email-wrapper-inner" style="font-size: 13px; padding: 20px; text-align: center">
<table id="email-content" cellspacing="0" cellpadding="0" border="0" style="font-family: Arial, FreeSans, Helvetica, sans-serif; width: 100%">
<tbody>
<tr valign="top">
<td id="email-content-inner" align="left" style="font-family: Arial, FreeSans, Helvetica, sans-serif; font-size: 13px; background-color: #fff; border: 1px solid #bbb; padding: 20px; text-align: left">
<table id="email-title" cellpadding="0" cellspacing="0" border="0" width="100%">
<tbody>
<tr>
<td id="email-title-avatar" rowspan="2" style="font-size: 13px; text-align: left; vertical-align: top; width: 48px; padding-right: 8px"> <img class="avatar" src="cid:avatar_925838d3d8b1f71935f30b314c925d64" border="0" height="48" width="48" style="-ms-interpolation-mode: bicubic; border-radius: 3px" /> </td>
<td valign="top" style="font-size: 13px">
<div id="email-title-flavor" class="email-metadata" style="margin: 0; padding: 0 0 4px 0; color: #505050">
<a href=" https://wiki.asterisk.org/wiki/display/~rnewton " style="color:#326ca6;text-decoration:none;; color: #326ca6; text-decoration: none">Rusty Newton</a> edited the page:
</div> </td>
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<tr>
<td valign="top" style="font-size: 13px"> <h2 id="email-title-heading" style="font-size: 16px; line-height: 20px; min-height: 20px; margin: 0; padding: 0"> <a href="https://wiki.asterisk.org/wiki/display/AST/Getting+a+Backtrace" style="color: #326ca6; text-decoration: none"> <img class="icon" src="cid:page-icon" alt="" style="border: 0; padding: 0 5px 0 0; text-align: left; vertical-align: middle" /> <strong style="font-size:16px;line-height:20px;vertical-align:top;">Getting a Backtrace</strong> </a> </h2> </td>
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</table>
<div class="email-indent" style="margin: 8px 0 16px 0">
<p class="aui-message info" style="font-size: 13px; margin: 1em 0; padding: 8px; background-color: #e0f0ff; border: 1px solid #9eb6d4"> <b>Comment:</b> Cleaned up the "Getting Information For A Deadlock" section, made it a little easier to read, added some links to other helpful pages, etc </p>
<div class="email-diff">
<div id="page-diffs" class="wiki-content">
<p class="diff-context-placeholder" style="font-size: 13px">...</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/macro-placeholder-default.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Wiki Markup</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">{numberedheadings}{numberedheadings}</pre> </td>
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<p class="diff-block-target" style="font-size: 13px"> </p>
<table class="diff-macro bodyless diff-html-changed" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;margin: 5px 0; padding: 0; width: auto;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="diff-html-changed" id="changed-diff-0" style="background-color: #d6f0ff;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/toc.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Table of Contents</span></th>
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<p style="font-size: 13px"></p>
<h2 id="GettingaBacktrace-Overview" class="diff-block-context">Overview</h2>
<p class="diff-block-context" style="font-size: 13px">The backtrace information is required by developers to help fix problems with bugs of any kind. Backtraces provide information about what was wrong when a program crashed; in our case, Asterisk.</p>
<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<p class="diff-block-context" style="font-size: 13px">If you're not sure if Asterisk is running with the -g option, type the following command in your shell:</p>
<table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-0" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># ps -C asterisk u
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 3018 1.1 2.7 636212 27768 pts/1 Sl+ 08:06 0:00 asterisk -vvvvvg -c
[...]
</pre> </td>
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<p class="diff-block-context" style="font-size: 13px">For extraction, we use a really nice tool, called gdb. To verify that you have gdb installed on your system:</p>
<table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-1" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># gdb -v
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
</pre> </td>
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<table class="diff-macro diff-block-context" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/tip.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Tip</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <p style="font-size: 13px">Just run the following command to get the output into the backtrace.txt file, ready for uploading to the issue tracker. Be sure to change the name of the core file to your actual core dump file:</p> </td>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-2" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># gdb -se "asterisk" -ex "bt full" -ex "thread apply all bt" --batch -c core > /tmp/backtrace.txt
</pre> </td>
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<p class="diff-block-context" style="font-size: 13px">Now load the core file in gdb with the following command. This will also save the output of gdb to the /tmp/backtract.txt file.</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-3" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># gdb -se "asterisk" -c core | tee /tmp/backtrace.txt
[...]
(You would see a lot of output here.)
[...]
Reading symbols from /usr/lib/asterisk/modules/app_externalivr.so...done.
Loaded symbols for /usr/lib/asterisk/modules/app_externalivr.so
#0 0x29b45d7e in ?? ()
(gdb)
</pre> </td>
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<p class="diff-block-context" style="font-size: 13px">Now at the gdb prompt, type: bt You would see output similar to:</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-4" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>(gdb) bt
#0 0x29b45d7e in ?? ()
#1 0x08180bf8 in ?? ()
#2 0xbcdffa58 in ?? ()
#3 0x08180bf8 in ?? ()
#4 0xbcdffa60 in ?? ()
#5 0x08180bf8 in ?? ()
#6 0x180bf894 in ?? ()
#7 0x0bf80008 in ?? ()
#8 0x180b0818 in ?? ()
#9 0x08068008 in ast_stopstream (tmp=0x40758d38) at file.c:180
#10 0x000000a0 in ?? ()
#11 0x000000a0 in ?? ()
#12 0x00000000 in ?? ()
#13 0x407513c3 in confcall_careful_stream (conf=0x8180bf8, filename=0x8181de8 "DAHDI/pseudo-1324221520") at app_meetme.c:262
#14 0x40751332 in streamconfthread (args=0x8180bf8) at app_meetme.c:1965
#15 0xbcdffbe0 in ?? ()
#16 0x40028e51 in pthread_start_thread () from /lib/libpthread.so.0
#17 0x401ec92a in clone () from /lib/libc.so.6
(gdb)
</pre> </td>
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<p class="diff-block-context" style="font-size: 13px">Now do a bt full as follows:</p>
<table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<tbody>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-5" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>(gdb) bt full
#0 0x29b45d7e in ?? ()
No symbol table info available.
#1 0x08180bf8 in ?? ()
No symbol table info available.
#2 0xbcdffa58 in ?? ()
No symbol table info available.
#3 0x08180bf8 in ?? ()
No symbol table info available.
#4 0xbcdffa60 in ?? ()
No symbol table info available.
#5 0x08180bf8 in ?? ()
No symbol table info available.
#6 0x180bf894 in ?? ()
No symbol table info available.
#7 0x0bf80008 in ?? ()
No symbol table info available.
#8 0x180b0818 in ?? ()
No symbol table info available.
#9 0x08068008 in ast_stopstream (tmp=0x40758d38) at file.c:180
No locals.
#10 0x000000a0 in ?? ()
No symbol table info available.
#11 0x000000a0 in ?? ()
No symbol table info available.
#12 0x00000000 in ?? ()
No symbol table info available.
#13 0x407513c3 in confcall_careful_stream (conf=0x8180bf8, filename=0x8181de8 "DAHDI/pseudo-1324221520") at app_meetme.c:262
f = (struct ast_frame *) 0x8180bf8
trans = (struct ast_trans_pvt *) 0x0
#14 0x40751332 in streamconfthread (args=0x8180bf8) at app_meetme.c:1965
No locals.
#15 0xbcdffbe0 in ?? ()
No symbol table info available.
#16 0x40028e51 in pthread_start_thread () from /lib/libpthread.so.0
No symbol table info available.
#17 0x401ec92a in clone () from /lib/libc.so.6
No symbol table info available.
(gdb)
</pre> </td>
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<p class="diff-block-context" style="font-size: 13px">To make sure we have the correct information, just do:</p>
<table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
<thead>
<tr>
<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-6" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>(gdb) thread apply all bt
Thread 1 (process 26252):
#0 0x29b45d7e in ?? ()
#1 0x08180bf8 in ?? ()
#2 0xbcdffa58 in ?? ()
#3 0x08180bf8 in ?? ()
#4 0xbcdffa60 in ?? ()
#5 0x08180bf8 in ?? ()
#6 0x180bf894 in ?? ()
#7 0x0bf80008 in ?? ()
#8 0x180b0818 in ?? ()
#9 0x08068008 in ast_stopstream (tmp=0x40758d38) at file.c:180
#10 0x000000a0 in ?? ()
#11 0x000000a0 in ?? ()
#12 0x00000000 in ?? ()
#13 0x407513c3 in confcall_careful_stream (conf=0x8180bf8, filename=0x8181de8 "DAHDI/pseudo-1324221520") at app_meetme.c:262
#14 0x40751332 in streamconfthread (args=0x8180bf8) at app_meetme.c:1965
#15 0xbcdffbe0 in ?? ()
#16 0x40028e51 in pthread_start_thread () from /lib/libpthread.so.0
#17 0x401ec92a in clone () from /lib/libc.so.6
(gdb)
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<p class="diff-context-placeholder" style="font-size: 13px">...</p>
<h2 id="GettingaBacktrace-GettingInformationForADeadlock" class="diff-block-context">Getting Information For A Deadlock</h2>
<p class="diff-block-target" style="font-size: 13px">Whenever <span class="diff-html-removed" id="removed-diff-7" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">supplying </span><span class="diff-html-added" id="added-diff-0" style="font-size: 100%; background-color: #ddfade;">collecting </span>information about a deadlock <span class="diff-html-removed" id="removed-diff-8" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">(i.e. when you run the 'core show locks' command on the Asterisk console), </span>it is useful to <span class="diff-html-removed" id="removed-diff-9" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">also </span>have additional information about the threads <span class="diff-html-added" id="added-diff-1" style="font-size: 100%; background-color: #ddfade;">involved</span>. We can generate this information by attaching to a running Asterisk process and gathering that information. <span class="diff-html-added" id="added-diff-2" style="font-size: 100%; background-color: #ddfade;">Follow the two steps below to collect debug that will be useful to Asterisk developers.</span> </p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/note.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Note</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <p style="font-size: 13px">You need <strong>DEBUG_THREADS</strong> enabled in the Compiler Flags menu of menuselect <span class="diff-html-added" id="added-diff-3" style="font-size: 100%; background-color: #ddfade;">and you should enable </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">BETTER_BACKTRACES</span></strong>. Be sure you recompile, install, and restart Asterisk prior to <span class="diff-html-removed" id="removed-diff-10" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">running 'core show locks'.</span><span class="diff-html-added" id="added-diff-4" style="font-size: 100%; background-color: #ddfade;">following these instructions.</span> </p> </td>
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<p class="diff-block-target diff-block-context" style="font-size: 13px"> <strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Use GDB to collect a backtrace:</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> </span>You can easily attach to a running Asterisk process, gather the output required and then detach from the process all in a single step. <span class="diff-html-added" id="added-diff-5" style="font-size: 100%; background-color: #ddfade;">Since this gathers information from the running Asterisk process, you want to make sure you run this command immediately before or after gathering the output of '</span><a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">core show locks</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">'. </span>Execute the following command and upload the resulting backtrace-threads.txt file to the Asterisk issue tracker:</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-11" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># gdb -ex "thread apply all bt" --batch /usr/sbin/asterisk `pidof asterisk` > /tmp/backtrace-threads.txt
</pre> </td>
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<p class="diff-block-target diff-block-context" style="font-size: 13px"> <span class="diff-html-removed" id="removed-diff-12" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">Note that this gathers information from the running Asterisk process, so you want to make sure you run this command immediately before or after gathering the output of 'core show locks'. You can gather that information by running the following command</span><strong><span class="diff-html-added" id="added-diff-6" style="font-size: 100%; background-color: #ddfade;">Collecting output from the "core show locks" CLI command :</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> After getting the backtrace with GDB, immediately run the following command from your Linux shell</span>:</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-13" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span># asterisk -rx "core show locks" > /tmp/core-show-locks.txt<span class="diff-html-removed" id="removed-diff-14" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>
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<p class="diff-block-target diff-block-context" style="font-size: 13px"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">For more info on: </span><a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Locking in Asterisk</span></a> </p>
<h2 id="GettingaBacktrace-VerifyYourBacktraces" class="diff-block-context">Verify Your Backtraces</h2>
<p class="diff-block-context" style="font-size: 13px">Before uploading your backtraces to the issue tracker, you should double check to make sure the data you have is of use to the developers. Check your backtrace files to make sure you're not seeing several of the following:</p>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.25/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-15" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span><value optimized out>
</pre> </td>
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<p class="diff-block-context" style="font-size: 13px">If you are, then you likely haven't compiled with DONT_OPTIMIZE. The impact of DONT_OPTIMIZE is negligible on most systems. Be sure you've enabled the DONT_OPTIMIZE flag within the Compiler Flags section of menuselect. After doing so, be sure to run 'make install' and restart Asterisk.</p>
<p class="diff-context-placeholder" style="font-size: 13px">...</p>
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