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-rw-r--r--lib/runtime_tools/doc/src/dbg.xml4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/runtime_tools/doc/src/dbg.xml b/lib/runtime_tools/doc/src/dbg.xml
index 0e63649c09..df4cdf7cab 100644
--- a/lib/runtime_tools/doc/src/dbg.xml
+++ b/lib/runtime_tools/doc/src/dbg.xml
@@ -528,6 +528,10 @@ Error: fun containing local erlang function calls ('is_atomm' called in guard) c
<p>Match specifications used can be saved in a file (if a
read-write file system is present) for use in later
debugging sessions, see <c>wtp/1</c> and <c>rtp/1</c></p>
+ <p>There are three built-in trace patterns:
+ <c>x</c>, <c>c</c> and <c>cx</c>. They represent an
+ exception trace, caller trace and a caller and exception trace
+ respectively.</p>
</desc>
</func>
<func>