nickva commented on a change in pull request #761: Add a debugging utilities
for listing processes
URL: https://github.com/apache/couchdb/pull/761#discussion_r134800875
##########
File path: src/couch/src/couch_debug.erl
##########
@@ -13,11 +13,195 @@
-module(couch_debug).
-export([
+ help/0,
+ help/1
+]).
+
+-export([
opened_files/0,
opened_files_by_regexp/1,
opened_files_contains/1
]).
+-export([
+ process_name/1,
+ link_tree/1,
+ link_tree/2,
+ mapfold_tree/3,
+ map_tree/2,
+ fold_tree/3,
+ linked_processes_info/2,
+ print_linked_processes/1
+]).
+
+help() ->
+ [
+ opened_files,
+ opened_files_by_regexp,
+ opened_files_contains,
+ process_name,
+ link_tree,
+ mapfold,
+ map,
+ fold,
+ linked_processes_info,
+ print_linked_processes,
+ ps
+ ].
+
+-spec help(Function :: atom()) -> ok.
+help(opened_files) ->
+ io:format("
+ opened_files()
+ --------------
+
+ Returns list of currently opened files
+ It iterates through erlang:ports and filter out all ports which are not
efile.
+ It uses `process_info(Pid, dictionary)` to get info about couch_file
properties.
+ ---
+ ", []);
+help(opened_files_by_regexp) ->
+ io:format("
+ opened_files_by_regexp(FileRegExp)
+ ----------------------------------
+
+ Returns list of currently opened files which name matches provided regular
expression.
+ It iterates through `erlang:ports()` and filter out all ports which are
not efile.
+ It uses `process_info(Pid, dictionary)` to get info about couch_file
properties.
+ ---
+ ", []);
+help(opened_files_contains) ->
+ io:format("
+ opened_files_contains(SubString)
+ --------------------------------
+
+ Returns list of currently opened files which name contains provided
SubString.
+ It iterates through `erlang:ports()` and filter out all ports which are
not efile.
Review comment:
filters out...
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