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-<?xml version="1.0" encoding="latin1" ?>
-<!DOCTYPE erlref SYSTEM "erlref.dtd">
-
-<erlref>
- <header>
- <copyright>
- <year>2006</year><year>2009</year>
- <holder>Ericsson AB. All Rights Reserved.</holder>
- </copyright>
- <legalnotice>
- The contents of this file are subject to the Erlang Public License,
- Version 1.1, (the "License"); you may not use this file except in
- compliance with the License. You should have received a copy of the
- Erlang Public License along with this software. If not, it can be
- retrieved online at http://www.erlang.org/.
-
- Software distributed under the License is distributed on an "AS IS"
- basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- the License for the specific language governing rights and limitations
- under the License.
-
- </legalnotice>
-
- <title>inviso_rt_meta</title>
- <prepared></prepared>
- <docno></docno>
- <date></date>
- <rev></rev>
- </header>
- <module>inviso_rt_meta</module>
- <modulesummary>Direct API to the Inviso Runtime Component's meta tracer</modulesummary>
- <description>
- <p>This module provides a direct API to the inviso meta tracer. These functions are only meant to be used in meta tracing <c>CallFunc</c> and <c>RemoveFunc</c>.</p>
- <p>It can sometimes be necessary to manipulate meta match-patterns from <c>CallFunc</c>s and <c>RemoveFunc</c>s. The problem then is that call-funcs and remove-funcs are meta trace call-backs executed inside the inviso meta tracer's context. Hence making calls to the regular API's manipulating meta trace-patterns will hang the inviso meta tracer!.</p>
- <p>To remedy this problem, a number of useful tpm-functions are available in this API. It must be understood that their actions are local to the Erlang node where they are called.</p>
- </description>
- <funcs>
- <func>
- <name>tpm_ms(Mod,Func,Arity,MSname,MS) -> {ok,0} | {ok,1} | {error,not_initiated}</name>
- <fsummary>Adds a list of match-specs, associated with the name <c>MSname</c>, to <c>Mod:Func/Arity</c>.</fsummary>
- <desc>
- <p>See inviso:tpm_ms/6 for details. Note that this function only effects meta trace-patterns on the Erlang node where the function is called. This also implies that only the local inviso meta tracer's name-database is updated with <c>MSname</c>.</p>
- </desc>
- </func>
- <func>
- <name>tpm_ms_tracer(Mod,Func,Arity,MSname,MS) -> {ok,0} | {ok,1} | {error,not_initiated}</name>
- <fsummary>As tpm_ms_tracer/5 but also adds a <c>{tracer,Tracer}</c>trace flag to the enable-list of every <c>trace</c>in <c>MS</c>.</fsummary>
- <desc>
- <p>See inviso:tpm_ms_ms/6 for details. Note that this function only effects meta trace-patterns on the Erlang node where the function is called. This also implies that only the local inviso meta tracer's name-database is updated with <c>MSname</c>.</p>
- </desc>
- </func>
- <func>
- <name>list_tpm_ms(Mod,Func,Arity) -> [MSname]</name>
- <fsummary>Returns a list of <c>MSname</c>.</fsummary>
- <desc>
- <p>Returns a list of all <c>MSname</c> in use for <c>Mod:Func/Arity</c>. This can be useful instead of having to have an own-implemented database over currently in use meta match-functions for a particular function.</p>
- </desc>
- </func>
- <func>
- <name>ctpm_ms(Mod,Func,Arity,MSname) -> ok</name>
- <fsummary>Removes the list of match-specs associated with the <c>MSname</c>from the meta trace-pattern of <c>Mod:Func/Arity</c>.</fsummary>
- <desc>
- <p>See inviso:ctpm_ms/5 for details. Note that this function only effects meta trace-patterns on the Erlang node where the function is called. This also implies that only the local inviso meta tracer's name-database is updated with <c>MSname</c>.</p>
- </desc>
- </func>
- <func>
- <name>get_tracer() -> Tracer</name>
- <fsummary>Returns the pid or port acting as regular tracer.</fsummary>
- <type>
- <v>Tracer = pid() | port()</v>
- </type>
- <desc>
- <p>Returns the pid or port acting as the receiver of regular trace messages. This is useful if it is necessary to manipulate meta trace-patterns by hand (using <c>erlang:trace_pattern/3</c>) and the <c>{tracer,Tracer}</c> must be used in one of the match-function bodies.</p>
- </desc>
- </func>
- </funcs>
-</erlref>
-