scripts/qemu-trace-stap: Convert documentation to rST

The qemu-trace-stap documentation is currently in
scripts/qemu-trace-stap.texi in Texinfo format, which we
present to the user as:
 * a qemu-trace-stap manpage
 * but not (unusually for QEMU) part of the HTML docs

Convert the documentation to rST format that lives in
the docs/ subdirectory, and present it to the user as:
 * a qemu-trace-stap manpage
 * part of the interop/ Sphinx manual

There are minor formatting changes to suit Sphinx, but no
content changes.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Tested-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 20200124162606.8787-8-peter.maydell@linaro.org

MAINTAINERS

@@ -2193,6 +2193,7 @@ F: qemu-option-trace.texi
 F: scripts/tracetool.py
 F: scripts/tracetool/
 F: scripts/qemu-trace-stap*
+F: docs/interop/qemu-trace-stap.rst
 F: docs/devel/tracing.txt
 T: git https://github.com/stefanha/qemu.git tracing
 

Makefile

@@ -357,7 +357,7 @@ ifdef CONFIG_VIRTFS
 DOCS+=fsdev/virtfs-proxy-helper.1
 endif
 ifdef CONFIG_TRACE_SYSTEMTAP
-DOCS+=scripts/qemu-trace-stap.1
+DOCS+=$(MANUAL_BUILDDIR)/interop/qemu-trace-stap.1
 endif
 else
 DOCS=
@@ -848,7 +848,7 @@ ifeq ($(CONFIG_TOOLS),y)
 	$(INSTALL_DATA) $(MANUAL_BUILDDIR)/interop/qemu-nbd.8 "$(DESTDIR)$(mandir)/man8"
 endif
 ifdef CONFIG_TRACE_SYSTEMTAP
-	$(INSTALL_DATA) scripts/qemu-trace-stap.1 "$(DESTDIR)$(mandir)/man1"
+	$(INSTALL_DATA) $(MANUAL_BUILDDIR)/interop/qemu-trace-stap.1 "$(DESTDIR)$(mandir)/man1"
 endif
 ifneq (,$(findstring qemu-ga,$(TOOLS)))
 	$(INSTALL_DATA) $(MANUAL_BUILDDIR)/interop/qemu-ga.8 "$(DESTDIR)$(mandir)/man8"
@@ -1050,7 +1050,9 @@ $(MANUAL_BUILDDIR)/specs/index.html: $(call manual-deps,specs)
 $(MANUAL_BUILDDIR)/system/index.html: $(call manual-deps,system)
 	$(call build-manual,system,html)
 
-$(call define-manpage-rule,interop,qemu-ga.8 qemu-img.1 qemu-nbd.8,$(SRC_PATH/qemu-img-cmds.hx))
+$(call define-manpage-rule,interop,\
+       qemu-ga.8 qemu-img.1 qemu-nbd.8 qemu-trace-stap.1,\
+       $(SRC_PATH/qemu-img-cmds.hx))
 
 $(call define-manpage-rule,system,qemu-block-drivers.7)
 
@@ -1078,7 +1080,6 @@ qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi
 qemu.1: qemu-option-trace.texi
 fsdev/virtfs-proxy-helper.1: fsdev/virtfs-proxy-helper.texi
 docs/qemu-cpu-models.7: docs/qemu-cpu-models.texi
-scripts/qemu-trace-stap.1: scripts/qemu-trace-stap.texi
 
 html: qemu-doc.html docs/interop/qemu-qmp-ref.html docs/interop/qemu-ga-ref.html sphinxdocs
 info: qemu-doc.info docs/interop/qemu-qmp-ref.info docs/interop/qemu-ga-ref.info

docs/interop/conf.py

@@ -22,5 +22,7 @@ man_pages = [
     ('qemu-img', 'qemu-img', u'QEMU disk image utility',
      ['Fabrice Bellard'], 1),
     ('qemu-nbd', 'qemu-nbd', u'QEMU Disk Network Block Device Server',
-     ['Anthony Liguori <anthony@codemonkey.ws>'], 8)
+     ['Anthony Liguori <anthony@codemonkey.ws>'], 8),
+    ('qemu-trace-stap', 'qemu-trace-stap', u'QEMU SystemTap trace tool',
+     [], 1)
 ]

docs/interop/index.rst

@@ -20,5 +20,6 @@ Contents:
    qemu-ga
    qemu-img
    qemu-nbd
+   qemu-trace-stap
    vhost-user
    vhost-user-gpu

docs/interop/qemu-trace-stap.rst

+QEMU SystemTap trace tool
+=========================
+
+Synopsis
+--------
+
+**qemu-trace-stap** [*GLOBAL-OPTIONS*] *COMMAND* [*COMMAND-OPTIONS*] *ARGS*...
+
+Description
+-----------
+
+The ``qemu-trace-stap`` program facilitates tracing of the execution
+of QEMU emulators using SystemTap.
+
+It is required to have the SystemTap runtime environment installed to use
+this program, since it is a wrapper around execution of the ``stap``
+program.
+
+Options
+-------
+
+.. program:: qemu-trace-stap
+
+The following global options may be used regardless of which command
+is executed:
+
+.. option:: --verbose, -v
+
+  Display verbose information about command execution.
+
+The following commands are valid:
+
+.. option:: list BINARY PATTERN...
+
+  List all the probe names provided by *BINARY* that match
+  *PATTERN*.
+
+  If *BINARY* is not an absolute path, it will be located by searching
+  the directories listed in the ``$PATH`` environment variable.
+
+  *PATTERN* is a plain string that is used to filter the results of
+  this command. It may optionally contain a ``*`` wildcard to facilitate
+  matching multiple probes without listing each one explicitly. Multiple
+  *PATTERN* arguments may be given, causing listing of probes that match
+  any of the listed names. If no *PATTERN* is given, the all possible
+  probes will be listed.
+
+  For example, to list all probes available in the ``qemu-system-x86_64``
+  binary:
+
+  ::
+
+    $ qemu-trace-stap list qemu-system-x86_64
+
+  To filter the list to only cover probes related to QEMU's cryptographic
+  subsystem, in a binary outside ``$PATH``
+
+  ::
+
+    $ qemu-trace-stap list /opt/qemu/4.0.0/bin/qemu-system-x86_64 'qcrypto*'
+
+.. option:: run OPTIONS BINARY PATTERN...
+
+  Run a trace session, printing formatted output any time a process that is
+  executing *BINARY* triggers a probe matching *PATTERN*.
+
+  If *BINARY* is not an absolute path, it will be located by searching
+  the directories listed in the ``$PATH`` environment variable.
+
+  *PATTERN* is a plain string that matches a probe name shown by the
+  *LIST* command. It may optionally contain a ``*`` wildcard to
+  facilitate matching multiple probes without listing each one explicitly.
+  Multiple *PATTERN* arguments may be given, causing all matching probes
+  to be monitored. At least one *PATTERN* is required, since stap is not
+  capable of tracing all known QEMU probes concurrently without overflowing
+  its trace buffer.
+
+  Invocation of this command does not need to be synchronized with
+  invocation of the QEMU process(es). It will match probes on all
+  existing running processes and all future launched processes,
+  unless told to only monitor a specific process.
+
+  Valid command specific options are:
+
+  .. program:: qemu-trace-stap-run
+
+  .. option:: --pid=PID, -p PID
+
+    Restrict the tracing session so that it only triggers for the process
+    identified by *PID*.
+
+  For example, to monitor all processes executing ``qemu-system-x86_64``
+  as found on ``$PATH``, displaying all I/O related probes:
+
+  ::
+
+    $ qemu-trace-stap run qemu-system-x86_64 'qio*'
+
+  To monitor only the QEMU process with PID 1732
+
+  ::
+
+    $ qemu-trace-stap run --pid=1732 qemu-system-x86_64 'qio*'
+
+  To monitor QEMU processes running an alternative binary outside of
+  ``$PATH``, displaying verbose information about setup of the
+  tracing environment:
+
+  ::
+
+    $ qemu-trace-stap -v run /opt/qemu/4.0.0/qemu-system-x86_64 'qio*'
+
+See also
+--------
+
+:manpage:`qemu(1)`, :manpage:`stap(1)`
+
+..
+  Copyright (C) 2019 Red Hat, Inc.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.

scripts/qemu-trace-stap.texi

-@example
-@c man begin SYNOPSIS
-@command{qemu-trace-stap} @var{GLOBAL-OPTIONS} @var{COMMAND} @var{COMMAND-OPTIONS} @var{ARGS...}
-@c man end
-@end example
-
-@c man begin DESCRIPTION
-
-The @command{qemu-trace-stap} program facilitates tracing of the execution
-of QEMU emulators using SystemTap.
-
-It is required to have the SystemTap runtime environment installed to use
-this program, since it is a wrapper around execution of the @command{stap}
-program.
-
-@c man end
-
-@c man begin OPTIONS
-
-The following global options may be used regardless of which command
-is executed:
-
-@table @option
-@item @var{--verbose}, @var{-v}
-
-Display verbose information about command execution.
-
-@end table
-
-The following commands are valid:
-
-@table @option
-
-@item @var{list} @var{BINARY} @var{PATTERN...}
-
-List all the probe names provided by @var{BINARY} that match
-@var{PATTERN}.
-
-If @var{BINARY} is not an absolute path, it will be located by searching
-the directories listed in the @code{$PATH} environment variable.
-
-@var{PATTERN} is a plain string that is used to filter the results of
-this command. It may optionally contain a @code{*} wildcard to facilitate
-matching multiple probes without listing each one explicitly. Multiple
-@var{PATTERN} arguments may be given, causing listing of probes that match
-any of the listed names. If no @var{PATTERN} is given, the all possible
-probes will be listed.
-
-For example, to list all probes available in the @command{qemu-system-x86_64}
-binary:
-
-@example
-$ qemu-trace-stap list qemu-system-x86_64
-@end example
-
-To filter the list to only cover probes related to QEMU's cryptographic
-subsystem, in a binary outside @code{$PATH}
-
-@example
-$ qemu-trace-stap list /opt/qemu/4.0.0/bin/qemu-system-x86_64 'qcrypto*'
-@end example
-
-
-@item @var{run} @var{OPTIONS} @var{BINARY} @var{PATTERN...}
-
-Run a trace session, printing formatted output any time a process that is
-executing @var{BINARY} triggers a probe matching @var{PATTERN}.
-
-If @var{BINARY} is not an absolute path, it will be located by searching
-the directories listed in the @code{$PATH} environment variable.
-
-@var{PATTERN} is a plain string that matches a probe name shown by the
-@var{list} command. It may optionally contain a @code{*} wildcard to
-facilitate matching multiple probes without listing each one explicitly.
-Multiple @var{PATTERN} arguments may be given, causing all matching probes
-to be monitored. At least one @var{PATTERN} is required, since stap is not
-capable of tracing all known QEMU probes concurrently without overflowing
-its trace buffer.
-
-Invocation of this command does not need to be synchronized with
-invocation of the QEMU process(es). It will match probes on all
-existing running processes and all future launched processes,
-unless told to only monitor a specific process.
-
-Valid command specific options are:
-
-@table @option
-@item @var{--pid=PID}, @var{-p PID}
-
-Restrict the tracing session so that it only triggers for the process
-identified by @code{PID}.
-
-@end table
-
-For example, to monitor all processes executing @command{qemu-system-x86_64}
-as found on $PATH, displaying all I/O related probes:
-
-@example
-$ qemu-trace-stap run qemu-system-x86_64 'qio*'
-@end example
-
-To monitor only the QEMU process with PID 1732
-
-@example
-$ qemu-trace-stap run --pid=1732 qemu-system-x86_64 'qio*'
-@end example
-
-To monitor QEMU processes running an alternative binary outside of
-@code{$PATH}, displaying verbose information about setup of the
-tracing environment:
-
-@example
-$ qemu-trace-stap -v run /opt/qemu/4.0.0/qemu-system-x86_64 'qio*'
-@end example
-
-@end table
-
-@c man end
-
-@ignore
-
-@setfilename qemu-trace-stap
-@settitle QEMU SystemTap trace tool
-
-@c man begin LICENSE
-
-Copyright (C) 2019 Red Hat, Inc.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-
-@c man end
-
-@c man begin SEEALSO
-qemu(1), stap(1)
-@c man end
-
-@end ignore