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path: root/scripts/tracetool/__init__.py
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* trace: introduce a formal group name for trace eventsDaniel P. Berrange2016-10-121-2/+4
| | | | | | | | | | | | | | | | | | | | | | | The declarations in the generated-tracers.h file are assuming there's only ever going to be one instance of this header, as they are not namespaced. When we have one header per event group, if a single source file needs to include multiple sets of trace events, the symbols will all clash. This change thus introduces a '--group NAME' arg to the 'tracetool' program. This will cause all the symbols in the generated header files to be given a unique namespace. If no group is given, the group name 'common' is used, which is suitable for the current usage where there is only one global trace-events file used for code generation. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 1475588159-30598-21-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: push reading of events up a level to tracetool mainDaniel P. Berrange2016-10-121-5/+3Star
| | | | | | | | | | | | Move the reading of events out of the 'tracetool.generate' method and into tracetool.main, so that the latter is not tied to generating from a single source of events. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-19-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: rename _read_events to read_eventsDaniel P. Berrange2016-10-121-2/+12
| | | | | | | | | | | The _read_events method is used by callers outside of its module, so should be a public method, not private. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-18-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: give each trace event a named TraceEvent structDaniel P. Berrange2016-10-121-0/+1
| | | | | | | | | | | | | Currently we only expose a TraceEvent array, which must be indexed via the TraceEventID enum constants. This changes the generator to expose a named TraceEvent instance for each event, with an _EVENT suffix. Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-10-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: remove global 'uint16 dstate[]' arrayDaniel P. Berrange2016-10-121-1/+2
| | | | | | | | | | | | | | | | | | Instead of having a global dstate array, declare a single 'uint16 TRACE_${EVENT_NAME}_DSTATE' variable for each trace event. Record a pointer to this variable in the TraceEvent struct too. By turning trace_event_get_state_dynamic_by_id into a macro, this still hits the fast path, and cache affinity is ensured by declaring all the uint16 vars adjacent to each other. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-7-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Add a proper API to manage auto-generated events from the 'tcg' propertyLluís Vilanova2016-03-011-3/+10
| | | | | | | | | Formalizes the existence of the 'event_trans' and 'event_exec' event attributes, which until now were monkey-patched only when necessary. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 145640558759.20978.6374959404425591089.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Add 'vcpu' event property to trace guest vCPULluís Vilanova2016-03-011-2/+9
| | | | | | | | | | | | | This property identifies events that trace vCPU-specific information. It adds a "CPUState*" argument to events with the property, identifying the vCPU raising the event. TCG translation events also have a "TCGv_env" implicit argument that is later used as the "CPUState*" argument at execution time. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 145641861797.30295.6991314023181842105.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Add helper function to cast event argumentsLluís Vilanova2016-03-011-0/+4
| | | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 145641860680.30295.1873612736245870753.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Remove unnecessary intermediate event copiesLluís Vilanova2016-03-011-3/+2Star
| | | | | | | | | The current code forces the use of a chain of ".original" dereferences, which looks odd. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 145641858988.30295.7223459456488075843.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Extend API to manage event argumentsLluís Vilanova2016-03-011-2/+13
| | | | | | | | | | Lets the user manage event arguments as a list, and simplifies argument concatenation. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 145641858432.30295.3069911069472672646.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* Tracing: Fix simpletrace.py error on tcg enabled binary tracesChristoph Seifert2014-11-181-34/+33Star
| | | | | | | simpletrace.py does not recognize the tcg option while reading trace-events file. In result simpletrace does not work on binary traces and tcg enabled events. Moved transformation of tcg enabled events to _read_events() which is used by simpletrace. Signed-off-by: Christoph Seifert <christoph.seifert@posteo.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* scripts/tracetool: don't barf on formats with precisionAlex Bennée2014-09-261-1/+1
| | | | | | | This only affects lttng user space tracing at the moment. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: tighten up trace-events regex to fix bad parseStefan Hajnoczi2014-09-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use \w for properties and trace event names since they are both drawn from [a-zA-Z0-9_] character sets. The .* for matching properties was too aggressive and caused the following failure with foo(int rc) "(this is a test)": Traceback (most recent call last): File "scripts/tracetool.py", line 139, in <module> main(sys.argv) File "scripts/tracetool.py", line 134, in main binary=binary, probe_prefix=probe_prefix) File "scripts/tracetool/__init__.py", line 334, in generate events = _read_events(fevents) File "scripts/tracetool/__init__.py", line 262, in _read_events res.append(Event.build(line)) File "scripts/tracetool/__init__.py", line 225, in build return Event(name, props, fmt, args, arg_fmts) File "scripts/tracetool/__init__.py", line 185, in __init__ % ", ".join(unknown_props)) ValueError: Unknown properties: foo(int, rc) Cc: Lluís Vilanova <vilanova@ac.upc.edu> Reported-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1411468626-20450-1-git-send-email-stefanha@redhat.com
* trace: [ust] Fix format string computation in tcg-enabled eventsLluís Vilanova2014-09-261-9/+10
| | | | | | | | TCG-enabled events start with two format strings. Delay per-argument format computation until requested ('Event.formats'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: teach lttng backend to use format stringsAlex Bennée2014-08-121-2/+10
| | | | | | | | | This makes the UST backend pay attention to the format string arguments that are defined when defining payload data. With this you can now ensure integers are reported in hex mode if you want. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tcg] Declare TCG tracing helper routinesLluís Vilanova2014-08-121-0/+1
| | | | | | | | Generates file "trace/generated-helpers.h" with TCG helper declarations to trace events in guest code at execution time ('trace_${event}_exec_proxy'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tcg] Add 'tcg' event propertyLluís Vilanova2014-08-121-5/+59
| | | | | | | | | | | | | | Transforms event: tcg name(...) "...", "..." into two internal events: tcg-trans name_trans(...) "..." tcg-exec name_exec(...) "..." Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tcg] Argument type transformation machineryLluís Vilanova2014-08-121-1/+29
| | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Multi-backend tracingLluís Vilanova2014-06-091-13/+11Star
| | | | | | | | | | | | | | | Adds support to compile QEMU with multiple tracing backends at the same time. For example, you can compile QEMU with: $ ./configure --enable-trace-backends=ftrace,dtrace Where 'ftrace' can be handy for having an in-flight record of events, and 'dtrace' can be later used to extract more information from the system. This patch allows having both available without recompiling QEMU. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tracetool] Minimize the amount of per-backend codeLluís Vilanova2014-05-071-17/+2Star
| | | | | | | Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tracetool] Cosmetic changesLluís Vilanova2014-05-071-7/+7
| | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tracetool] Spacing changesLluís Vilanova2014-05-071-3/+4
| | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tracetool] Add methods 'Event.copy' and 'Arguments.copy'Lluís Vilanova2014-05-071-0/+9
| | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: [tracetool] Add method 'Event.api' to build event namesLluís Vilanova2014-05-071-1/+9
| | | | | | | Makes it easier to ensure proper naming across the different frontends and backends. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* tracetool: avoid str.rpartition() Python 2.5 functionStefan Hajnoczi2012-05-011-7/+10
| | | | | | | | | | | The str.rpartition() function is related to str.split() and is used for splitting strings. It was introduced in Python 2.5 and therefore cannot be used in tracetool as Python 2.4 compatibility is required. Replace the code using str.rsplit(). Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
* tracetool: use Python 2.4-compatible __import__() argumentsStefan Hajnoczi2012-05-011-1/+1
| | | | | | | | In Python 2.5 keyword arguments were added to __import__(). Avoid using them to achieve Python 2.4 compatibility. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
* tracetool: Add support for the 'dtrace' backendLluís Vilanova2012-04-181-1/+10
| | | | | Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
* tracetool: Rewrite infrastructure as python modulesLluís Vilanova2012-04-181-0/+262
The tracetool script is written in shell and has hit several portability problems due to shell quirks or external tools across host platforms. Additionally the amount of string processing and lack of real data structures makes it tough to implement code generator backends for tracers that are more complex. This patch replaces the shell version of tracetool with a Python version. The new tracetool design is: scripts/tracetool.py - top-level script scripts/tracetool/backend/ - tracer backends live here (simple, ust) scripts/tracetool/format/ - output formats live here (.c, .h) There is common code for trace-events definition parsing so that backends can focus on generating code rather than parsing input. Support for all existing backends (nop, stderr, simple, ust, and dtrace) is added back in follow-up patches. [Commit description written by Stefan Hajnoczi] Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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