diff options
Diffstat (limited to 'lib/runtime_tools/doc/src')
| -rw-r--r-- | lib/runtime_tools/doc/src/Makefile | 22 | ||||
| -rw-r--r-- | lib/runtime_tools/doc/src/dbg.xml | 23 | ||||
| -rw-r--r-- | lib/runtime_tools/doc/src/dyntrace.xml | 209 | ||||
| -rw-r--r-- | lib/runtime_tools/doc/src/make.dep | 20 | ||||
| -rw-r--r-- | lib/runtime_tools/doc/src/notes.xml | 120 | ||||
| -rw-r--r-- | lib/runtime_tools/doc/src/ref_man.xml | 3 |
6 files changed, 361 insertions, 36 deletions
diff --git a/lib/runtime_tools/doc/src/Makefile b/lib/runtime_tools/doc/src/Makefile index dbbae81cfe..d240b287c3 100644 --- a/lib/runtime_tools/doc/src/Makefile +++ b/lib/runtime_tools/doc/src/Makefile @@ -1,7 +1,7 @@ # # %CopyrightBegin% # -# Copyright Ericsson AB 1999-2009. All Rights Reserved. +# Copyright Ericsson AB 1999-2012. All Rights Reserved. # # 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 @@ -40,7 +40,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN) # Target Specs # ---------------------------------------------------- XML_APPLICATION_FILES = ref_man.xml -XML_REF3_FILES = dbg.xml erts_alloc_config.xml +XML_REF3_FILES = dbg.xml dyntrace.xml erts_alloc_config.xml XML_REF6_FILES = runtime_tools_app.xml XML_PART_FILES = part_notes.xml part_notes_history.xml @@ -108,16 +108,16 @@ clean clean_docs: include $(ERL_TOP)/make/otp_release_targets.mk release_docs_spec: docs - $(INSTALL_DIR) $(RELSYSDIR)/doc/pdf - $(INSTALL_DATA) $(TOP_PDF_FILE) $(RELSYSDIR)/doc/pdf - $(INSTALL_DIR) $(RELSYSDIR)/doc/html + $(INSTALL_DIR) "$(RELSYSDIR)/doc/pdf" + $(INSTALL_DATA) $(TOP_PDF_FILE) "$(RELSYSDIR)/doc/pdf" + $(INSTALL_DIR) "$(RELSYSDIR)/doc/html" $(INSTALL_DATA) $(HTMLDIR)/* \ - $(RELSYSDIR)/doc/html - $(INSTALL_DATA) $(INFO_FILE) $(RELSYSDIR) - $(INSTALL_DIR) $(RELEASE_PATH)/man/man3 - $(INSTALL_DATA) $(MAN3DIR)/* $(RELEASE_PATH)/man/man3 - $(INSTALL_DIR) $(RELEASE_PATH)/man/man6 - $(INSTALL_DATA) $(MAN6_FILES) $(RELEASE_PATH)/man/man6 + "$(RELSYSDIR)/doc/html" + $(INSTALL_DATA) $(INFO_FILE) "$(RELSYSDIR)" + $(INSTALL_DIR) "$(RELEASE_PATH)/man/man3" + $(INSTALL_DATA) $(MAN3DIR)/* "$(RELEASE_PATH)/man/man3" + $(INSTALL_DIR) "$(RELEASE_PATH)/man/man6" + $(INSTALL_DATA) $(MAN6_FILES) "$(RELEASE_PATH)/man/man6" release_spec: diff --git a/lib/runtime_tools/doc/src/dbg.xml b/lib/runtime_tools/doc/src/dbg.xml index f26789fa21..c7c5cd4ff0 100644 --- a/lib/runtime_tools/doc/src/dbg.xml +++ b/lib/runtime_tools/doc/src/dbg.xml @@ -316,7 +316,8 @@ Error: fun containing local erlang function calls ('is_atomm' called in guard) c <v>Module = atom() | '_'</v> <v>Function = atom() | '_'</v> <v>Arity = integer() |'_'</v> - <v>MatchSpec = integer() | atom() | [] | match_spec()</v> + <v>MatchSpec = integer() | Built-inAlias | [] | match_spec()</v> + <v>Built-inAlias = x | c | cx</v> <v>MatchDesc = [MatchInfo]</v> <v>MatchInfo = {saved, integer()} | MatchNum</v> <v>MatchNum = {matched, node(), integer()} | {matched, node(), 0, RPCError}</v> @@ -349,8 +350,9 @@ Error: fun containing local erlang function calls ('is_atomm' called in guard) c if the MatchSpec is other than []. The integer <c>N</c> may then be used in subsequent calls to this function and will stand as an - "alias" for the given expression. There are also built-in - aliases named with atoms (see also <c>ltp/0</c> below).</p> + "alias" for the given expression. There are also a couple of + built-in aliases for common expressions, see <c>ltp/0</c> below + for details.</p> <p>If an error is returned, it can be due to errors in compilation of the match specification. Such errors are presented as a list of tuples <c>{error, string()}</c> where @@ -528,6 +530,21 @@ 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>exception_trace</c>, <c>caller_trace</c> + and <c>caller_exception_trace</c> (or <c>x</c>, <c>c</c> and + <c>cx</c> respectively). + Exception trace sets a trace which will show function names, + parameters, return values and exceptions thrown from functions. + Caller traces display function names, parameters and information + about which function called it. An example using a built-in alias:</p> + <pre> +(x@y)4> <input>dbg:tp(lists,sort,cx).</input> +{ok,[{matched,nonode@nohost,2},{saved,cx}]} +(x@y)4> <input>lists:sort([2,1]).</input> +(<0.32.0>) call lists:sort([2,1]) ({erl_eval,do_apply,5}) +(<0.32.0>) returned from lists:sort/1 -> [1,2] +[1,2]</pre> </desc> </func> <func> diff --git a/lib/runtime_tools/doc/src/dyntrace.xml b/lib/runtime_tools/doc/src/dyntrace.xml new file mode 100644 index 0000000000..5fc5530f25 --- /dev/null +++ b/lib/runtime_tools/doc/src/dyntrace.xml @@ -0,0 +1,209 @@ +<?xml version="1.0" encoding="latin1" ?> +<!DOCTYPE erlref SYSTEM "erlref.dtd"> + +<erlref> + <header> + <copyright> + <year>1996</year><year>2012</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>dyntrace</title> + <prepared>Patrik Nyblom</prepared> + <responsible></responsible> + <docno>1</docno> + <approved>ETX/B/SFP (Kenneth Lundin)</approved> + <checked></checked> + <date>12-03-20</date> + <rev>A</rev> + <file>dyntrace.xml</file> + </header> + <module>dyntrace</module> + <modulesummary>Interface to dynamic tracing</modulesummary> + <description> + <p>This module implements interfaces to dynamic tracing, should such be compiled into the virtual machine. For a standard and/or commercial build, no dynamic tracing is available, in which case none of the functions in this module is usable or give any effect.</p> + <p>Should dynamic tracing be enabled in the current build, either by configuring with <c>./configure --with-dynamic-trace=dtrace</c> or with <c>./configure --with-dynamic-trace=systemtap</c>, the module can be used for two things:</p> + <list type="bulleted"> + <item>Trigger the user-probe <c>user_trace_i4s4</c> in the NIF library <c>dyntrace.so</c> by calling <c>dyntrace:p/{1,2,3,4,5,6,7,8}</c>.</item> + <item>Set a user specified tag that will be present in the trace messages of both the <c>efile_drv</c> and the user-probe mentioned above.</item> + </list> + <p>Both building with dynamic trace probes and using them is experimental and unsupported by Erlang/OTP. It is included as an option for the developer to trace and debug performance issues in their systems.</p> + <p>The original implementation is mostly done by Scott Lystiger Fritchie as an Open Source Contribution and it should be viewed as such even though the source for dynamic tracing as well as this module is included in the main distribution. However, the ability to use dynamic tracing of the virtual machine is a very valuable contribution which OTP has every intention to maintain as a tool for the developer.</p> + <p>How to write <c>d</c> programs or <c>systemtap</c> scripts can be learned from books and from a lot of pages on the Internet. This manual page does not include any documentation about using the dynamic trace tools of respective platform. The <c>examples</c> directory of the <c>runtime_tools</c> application however contains comprehensive examples of both <c>d</c> and <c>systemtap</c> programs that will help you get started. Another source of information is the <c>README.dtrace(.md)</c> and <c>README.systemtap(.md)</c> files in the Erlang source top directory.</p> + </description> + <funcs> + <func> + <name>available() -> boolean()</name> + <fsummary>Check if dynamic tracing is available</fsummary> + <desc> + <p>This function uses the NIF library to determine if dynamic + tracing is available. Usually calling <seealso + marker="erts:erlang#system_info/1">erlang:system_info/1</seealso> + is a better indicator of the availability of dynamic + tracing.</p> + <p>The function will throw an exception if the <c>dyntrace</c> NIF library could not be loaded by the on_load function of this module.</p> + </desc> + </func> + <func> + <name>p() -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message only containing the user tag and zeroes/empty strings in all other fields.</p> + </desc> + </func> + <func> + <name>p(integer() | string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer or string parameter in the first integer/string field.</p> + </desc> + </func> + <func> + <name>p(integer() | string(), integer() | string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters. I.e. <c>p(1,"Hello")</c> is ok, as is <c>p(1,1)</c> and <c>p("Hello","Again")</c>, but not <c>p("Hello",1)</c>.</p> + </desc> + </func> + <func> + <name>p(integer() | string(), integer() | string(), integer() | string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters, as in <seealso marker="#p/2">p/2</seealso>.</p> + </desc> + </func> + <func> + <name>p(integer() | string(), integer() | string(), integer() | string(), integer() | string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters, as in <seealso marker="#p/2">p/2</seealso>.</p> + </desc> + </func> + <func> + <name>p(integer(), integer() | string(), integer() | string(), integer() | string(), string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters, as in <seealso marker="#p/2">p/2</seealso>.</p> + <p>There can be no more than four parameters of any type (integer() or string()), so the first parameter has to be an integer() and the last a string().</p> + </desc> + </func> + <func> + <name>p(integer(), integer(), integer() | string(), integer() | string(), string(), string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters, as in <seealso marker="#p/2">p/2</seealso>.</p> + <p>There can be no more than four parameters of any type (integer() or string()), so the first two parameters has to be integer()'s and the last two string()'s.</p> + </desc> + </func> + <func> + <name>p(integer(), integer(), integer(), integer() | string(), string(), string(), string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing the user tag and the integer() or string() parameters as the first fields of respective type. integer() parameters should be put before any string() parameters, as in <seealso marker="#p/2">p/2</seealso>.</p> + <p>There can be no more than four parameters of any type (integer() or string()), so the first three parameters has to be integer()'s and the last three string()'s.</p> + </desc> + </func> + <func> + <name>p(integer(), integer(), integer(), integer(), string(), string(), string(), string()) -> true | false | error | badarg</name> + <fsummary>Trigger the user trace probe.</fsummary> + <desc> + <p>Calling this function will trigger the "user" trace probe user_trace_i4s4 in the dyntrace NIF module, sending a trace message containing all the integer()'s and string()'s provided, as well as any user tag set in the current process.</p> + </desc> + </func> + <func> + <name>get_tag() -> binary() | undefined</name> + <fsummary>Get the user tag set in the process.</fsummary> + <desc> + <p>This function returns the user tag set in the current + process. If no tag is set or dynamic tracing is not available, + it returns <c>undefined</c></p> + </desc> + </func> + <func> + <name>get_tag() -> binary() | undefined</name> + <fsummary>Get the user tag set in the process or sent to the process.</fsummary> + <desc> + <p>This function returns the user tag set in the current + process or, if no user tag is present, the last user tag sent + to the process together with a message (in the same way as + <seealso marker="kernel:seq_trace">sequential trace + tokens</seealso> are spread to other processes together with + messages. For an explanation of how user tags can be spread + together with messages, see <seealso + marker="#spread_tag/1">spread_tag/1</seealso>. If no tag is + found or dynamic tracing is not available, it returns + <c>undefined</c></p> + </desc> + </func> + + <func> + <name>put_tag(Item) -> binary() | undefined </name> + <fsummary>Set the user tag of the current process.</fsummary> + <type> + <v>Item = iodata()</v> + </type> + <desc> + <p>This function sets the user tag of the current process. The user tag is a binary(), but can be specified as any iodata(), which is automatically converted to a binary by this function.</p> + <p>The user tag is provided to the user probes triggered by calls top <c>dyntrace:p/{1,2,3,4,5,6,7,8}</c> as well as probes in the efile_driver. In the future, user tags might be added to more probes.</p> + <p>The old user tag (if any) is returned, or <c>undefined</c> if no user tag was present or dynamic tracing is not enabled.</p> + </desc> + </func> + <func> + <name>spread_tag(boolean()) -> TagData</name> + <fsummary>Start or stop spreading dynamic trace user tags with the next message.</fsummary> + <type> + <v>TagData = opaque data that can be used as parameter to <seealso marker="#restore_tag/1">restore_tag/1</seealso></v> + </type> + <desc> + <p>This function controls if user tags are to be spread to other processes with the next message. Spreading of user tags work like spreading of sequential trace tokens, so that a received user tag will be active in the process until the next message arrives (if that message does not also contain the user tag.</p> + <p>This functionality is used when a client process communicates with a file i/o-server to spread the user tag to the I/O-server and then down to the efile_drv driver. By using <c>spread_tag/1</c> and <c>restore_tag/1</c>, one can enable or disable spreading of user tags to other processes and then restore the previous state of the user tag. The TagData returned from this call contains all previous information so the state (including any previously spread user tags) will be completely restored by a later call to <c>restore_tag/1</c>.</p> + <p>The <seealso marker="kernel:file">file</seealso> module already spread's tags, so there is noo need to manually call these function to get user tags spread to the efile driver through that module.</p> + <p>The most use of this function would be if one for example uses the <seealso marker="stdlib:io">io</seealso> module to communicate with an I/O-server for a regular file, like in the following example:</p> +<pre> +f() -> + {ok, F} = file:open("test.tst",[write]), + Saved = dyntrace:spread_tag(true), + io:format(F,"Hello world!",[]), + dyntrace:restore_tag(Saved), + file:close(F). +</pre> + <p>In this example, any user tag set in the calling process will be spread to the I/O-server when the io:format call is done.</p> + </desc> + </func> + <func> + <name>restore_tag(TagData) -> true</name> + <fsummary>Restore to a previous state of user tag spreading.</fsummary> + <type> + <v>TagData = opaque data returned by <seealso marker="#spread_tag/1">spread_tag/1</seealso></v> + </type> + <desc> + <p>Restores the previous state of user tags and their spreading as it was before a call to <seealso marker="#spread_tag/1">spread_tag/1</seealso>. Note that the restoring is not limited to the same process, one can utilize this to turn off spreding in one process and restore it in a newly created, the one that actually is going to send messages:</p> +<pre> +f() -> + TagData=dyntrace:spread_tag(false), + spawn(fun() -> + dyntrace:restore_tag(TagData), + do_something() + end), + do_something_else(), + dyntrace:restore_tag(TagData). +</pre> + <p>Correctly handling user tags and their spreading might take some effort, as Erlang programs tend to send and receive messages so that sometimes the user tag gets lost due to various things, like double receives or communication with a port (ports do not handle user tags, in the same way as they do not handle regular sequential trace tokens).</p> + </desc> + </func> + </funcs> + </erlref> + diff --git a/lib/runtime_tools/doc/src/make.dep b/lib/runtime_tools/doc/src/make.dep deleted file mode 100644 index 85eae88adf..0000000000 --- a/lib/runtime_tools/doc/src/make.dep +++ /dev/null @@ -1,20 +0,0 @@ -# ---------------------------------------------------- -# >>>> Do not edit this file <<<< -# This file was automaticly generated by -# /home/otp/bin/docdepend -# ---------------------------------------------------- - - -# ---------------------------------------------------- -# TeX files that the DVI file depend on -# ---------------------------------------------------- - -book.dvi: book.tex dbg.tex erts_alloc_config.tex refman.tex \ - runtime_tools_app.tex - -# ---------------------------------------------------- -# Source inlined when transforming from source to LaTeX -# ---------------------------------------------------- - -book.tex: refman.xml - diff --git a/lib/runtime_tools/doc/src/notes.xml b/lib/runtime_tools/doc/src/notes.xml index 0bb76e1ea4..90641719c5 100644 --- a/lib/runtime_tools/doc/src/notes.xml +++ b/lib/runtime_tools/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2011</year> + <year>2004</year><year>2012</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -31,6 +31,124 @@ <p>This document describes the changes made to the Runtime_Tools application.</p> +<section><title>Runtime_Tools 1.8.9</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Change the module-level docs to give complete + step-by-step instructions for using the `dyntrace:p()` + trace function. (Thanks to Scott Lystig Fritchie)</p> + <p> + Own Id: OTP-10141</p> + </item> + <item> + <p> + Add 1024 separate USDT probes to dyntrace.erl and + dyntrace.c (Thanks to Scott Lystig Fritchie)</p> + <p> + Own Id: OTP-10143</p> + </item> + <item> + <p> + Relocate bodies of DTrace probes to the statically-linked + VM.</p> + <p> + Due to various operating systems (in both the DTrace and + SystemTap worlds) not fully supporting DTrace probes (or + SystemTap-compatibility mode probes) in shared libraries, + we relocate those probes to the statically-linked virtual + machine. This could be seen as pollution of the pristine + VM by a (yet) experimental feature. However:</p> + <p> + 1. This code can be eliminated completely by the C + preprocessor. 2. Leaving the probes in the dyntrace NIF + shared library simply does not work correctly on too many + platforms. *Many* thanks to Macneil Shonle at Basho for + assisting when my RSI-injured fingers gave out. (note: + Solaris 10 and FreeBSD 9.0-RELEASE can take a long time + to compile)</p> + <p> + Own Id: OTP-10189</p> + </item> + </list> + </section> + +</section> + +<section><title>Runtime_Tools 1.8.8</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The DTrace source patch from Scott Lystig Fritchie is + integrated in the source tree. Using an emulator with + dtrace probe is still not supported for production use, + but may be a valuable debugging tool. Configure with + --with-dynamic-trace=dtrace (or + --with-dynamic-trace=systemtap) to create a build with + dtrace probes enabled. See runtime_tools for + documentation and examples.</p> + <p> + Own Id: OTP-10017</p> + </item> + </list> + </section> + +</section> + +<section><title>Runtime_Tools 1.8.7</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Earlier dbg:stop only did erlang:trace_delivered and did + not flush the trace file driver. Therefore there could + still be trace messages that were delivered to the driver + (guaranteed by erlang:trace_delivered) but not yet + written to the file when dbg:stop returned. Flushing is + now added on each node before the dbg process terminates.</p> + <p> + Own Id: OTP-9651</p> + </item> + <item> + <p> + File handles created by the trace_file_drv driver was + inherited to child processes. This is now corrected.</p> + <p> + Own Id: OTP-9658</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>Erlang/OTP can now be built using parallel make if you + limit the number of jobs, for instance using '<c>make + -j6</c>' or '<c>make -j10</c>'. '<c>make -j</c>' does not + work at the moment because of some missing + dependencies.</p> + <p> + Own Id: OTP-9451</p> + </item> + <item> + <p> + Two new built-in trace pattern aliases have been added: + caller_trace (c) and caller_exception_trace (cx). See the + dbg:ltp/0 documentation for more info.</p> + <p> + Own Id: OTP-9458</p> + </item> + </list> + </section> + +</section> + <section><title>Runtime_Tools 1.8.6</title> <section><title>Improvements and New Features</title> diff --git a/lib/runtime_tools/doc/src/ref_man.xml b/lib/runtime_tools/doc/src/ref_man.xml index 579efcd969..df3446cd17 100644 --- a/lib/runtime_tools/doc/src/ref_man.xml +++ b/lib/runtime_tools/doc/src/ref_man.xml @@ -4,7 +4,7 @@ <application xmlns:xi="http://www.w3.org/2001/XInclude"> <header> <copyright> - <year>1999</year><year>2009</year> + <year>1999</year><year>2012</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -33,6 +33,7 @@ </description> <xi:include href="runtime_tools_app.xml"/> <xi:include href="dbg.xml"/> + <xi:include href="dyntrace.xml"/> <xi:include href="erts_alloc_config.xml"/> </application> |