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* tracetool: avoid invalid escape in Python stringMarc-André Lureau2023-11-091-1/+1
| | | | | | | | | | This is an error in Python 3.12; fix it by using a raw string literal. Cc: <qemu-stable@nongnu.org> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20231108105649.60453-1-marcandre.lureau@redhat.com>
* tracetool: avoid invalid escape in Python stringPaolo Bonzini2023-10-171-7/+7
| | | | | | | This is an error in Python 3.12; fix it by using a raw string literal. Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tracing: remove transform.pyRichard Henderson2023-03-051-23/+0
| | | | | | | | | This file, and a couple of uses, got left behind when the tcg stuff was removed from tracetool. Fixes: 126d4123c50a ("tracing: excise the tcg related from tracetool") Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
* tracing: excise the tcg related from tracetoolAlex Bennée2022-02-091-39/+2
| | | | | | | | | | | | | | Now we have no TCG trace events and no longer handle them in the code we can remove the handling from the tracetool to generate them. vcpu tracing is still available although the existing syscall event is an exercise in redundancy (plugins and -strace can also get the information). Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Cc: Luis Vilanova <vilanova@imperial.ac.uk> Cc: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20220204204335.1689602-21-alex.bennee@linaro.org>
* scripts/tracetool: Replace the word 'whitelist'Philippe Mathieu-Daudé2021-03-091-1/+1
| | | | | | | | | | | | | | | | | Follow the inclusive terminology from the "Conscious Language in your Open Source Projects" guidelines [*] and replace the words "whitelist" appropriately. [*] https://github.com/conscious-lang/conscious-lang-docs/blob/main/faq.md Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210303184644.1639691-3-philmd@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* tracetool: add input filename and line number to EventStefan Hajnoczi2021-01-041-5/+22
| | | | | | | | | | | Store the input filename and line number in Event. A later patch will use this to improve error messages. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200827142915.108730-4-stefanha@redhat.com>
* tracetool: add out_lineno and out_next_lineno to out()Stefan Hajnoczi2021-01-041-1/+9
| | | | | | | | | | | Make the output file line number and next line number available to out(). A later patch will use this to improve error messages. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200827142915.108730-3-stefanha@redhat.com>
* tracetool: add output filename command-line argumentStefan Hajnoczi2021-01-041-2/+16
| | | | | | | | | | | | | | The tracetool.py script writes to stdout. This means the output filename is not available to the script. Add the output filename to the command-line so that the script has access to the filename. This also simplifies the tracetool.py invocation. It's no longer necessary to use meson's custom_build(capture : true) to save output. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200827142915.108730-2-stefanha@redhat.com>
* scripts/: fix some comment spelling errorszhaolichang2020-09-171-1/+1
| | | | | | | | | | | I found that there are many spelling errors in the comments of qemu, so I used the spellcheck tool to check the spelling errors and finally found some spelling errors in the scripts folder. Signed-off-by: zhaolichang <zhaolichang@huawei.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20200917075029.313-5-zhaolichang@huawei.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* scripts/tracetool: Update maintainer email addressPhilippe Mathieu-Daudé2020-06-241-1/+1
| | | | | | | | | | | | | | | | | There is an effort in progress to generate a QEMU Python package. As I'm not sure this old email is still valid, update it to not produce package with broken maintainer email. Patch created mechanically by running: $ sed -i 's,\(__email__ *= "\)stefanha@linux.vnet.ibm.com",\1stefanha@redhat.com",' \ $(git grep -l 'email.*stefanha@linux.vnet.ibm.com') Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20200511082816.696-1-philmd@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* scripts/tracetool: Remove shebang headerPhilippe Mathieu-Daudé2020-02-071-1/+0
| | | | | | | | | | | | | | | | | Patch created mechanically by running: $ chmod 644 $(git grep -lF '#!/usr/bin/env python' \ | xargs grep -L 'if __name__.*__main__') $ sed -i "/^#\!\/usr\/bin\/\(env\ \)\?python.\?$/d" \ $(git grep -lF '#!/usr/bin/env python' \ | xargs grep -L 'if __name__.*__main__') Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200130163232.10446-9-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* trace: avoid "is" with a literal Python 3.8 warningsStefan Hajnoczi2019-10-151-2/+2
| | | | | | | | | | | | | | | The following statement produces a SyntaxWarning with Python 3.8: if len(format) is 0: scripts/tracetool/__init__.py:459: SyntaxWarning: "is" with a literal. Did you mean "=="? Use the conventional len(x) == 0 syntax instead. Reported-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191010122154.10553-1-stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: Forbid event format ending with newline characterPhilippe Mathieu-Daudé2019-09-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Event format ending with newlines confuse the trace reports. Forbid them. Add a check to refuse new format added with trailing newline: $ make [...] GEN hw/misc/trace.h Traceback (most recent call last): File "scripts/tracetool.py", line 152, in <module> main(sys.argv) File "scripts/tracetool.py", line 143, in main events.extend(tracetool.read_events(fh, arg)) File "scripts/tracetool/__init__.py", line 367, in read_events event = Event.build(line) File "scripts/tracetool/__init__.py", line 281, in build raise ValueError("Event format can not end with a newline character") ValueError: Error at hw/misc/trace-events:121: Event format can not end with a newline character Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20190916095121.29506-3-philmd@redhat.com Message-Id: <20190916095121.29506-3-philmd@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: forbid use of %m in trace event format stringsDaniel P. Berrangé2019-01-241-0/+4
| | | | | | | | | | | | | | | | | | | | | | The '%m' format instructs glibc's printf()/syslog() implementation to insert the contents of strerror(errno). Since this is a glibc extension it should generally be avoided in QEMU due to need for portability to a variety of platforms. Even though vfio is Linux-only code that could otherwise use "%m", it must still be avoided in trace-events files because several of the backends do not use the format string and so this error information is invisible to them. The errno string value should be given as an explicit trace argument instead, making it accessible to all backends. This also allows it to work correctly with future patches that use the format string with systemtap's simple printf code. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-id: 20190123120016.4538-4-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: enforce that every trace-events file has a final newlineDaniel P. Berrangé2019-01-241-0/+2
| | | | | | | | | | | | | | When generating the trace-events-all file, the build system simply concatenates all the individual trace-events files. If any one of those files does not have a final newline, the printf format string will have the contents of the first line of the next file appended to it, which is usually a '#' comment. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-id: 20190123120016.4538-3-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: forbid floating point typesStefan Hajnoczi2018-06-271-2/+0
| | | | | | | | | | | | | | | | | | | Only one existing trace event uses a floating point type. Unfortunately float and double cannot be supported since SystemTap does not have floating point types. Remove float and double from the whitelist and document this limitation. Update the migrate_transferred trace event to use uint64_t instead of double. Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Daniel P. Berrangé <berrange@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-id: 20180621150254.4922-1-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: only permit standard C types and fixed size integer typesDaniel P. Berrangé2018-03-121-0/+46
| | | | | | | | | | | | | Some trace backends will compile code based on the declared trace events. It should not be assumed that the backends can resolve any QEMU specific typedefs. So trace events should restrict their argument types to the standard C types and fixed size integer types. Any complex pointer types can be declared as "void *" for purposes of trace events, since nothing will be dereferencing these pointer arguments. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-id: 20180308155524.5082-3-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: include filename when printing parser error messagesDaniel P. Berrangé2018-03-121-2/+4
| | | | | | | | | | | | | | | | Improves error messages from: ValueError: Error on line 72: need more than 1 value to unpack To ValueError: Error at /home/berrange/src/virt/qemu/trace-events:72: need more than 1 value to unpack Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20180306154650.24075-1-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* tracetool: Update argument format regex to non-greedy starJon Emil Jahren2018-02-191-2/+3
| | | | | | | | | | | | | | | | Using the greedy star matching, arguments like "...%"PRIx64 caused issues for functions with multiple PRI formats. The issue was only seen with the ust backend, as it is the only one using the format regex. The result for many functions was that the arguments coming after the greedy star end was left out of the tracepoint, and in some cases some of the arguments that was traced had the wrong format. Signed-off-by: Jon Emil Jahren <jonemilj@gmail.com> Message-id: 20180129041648.30884-2-jonemilj@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* tracetool: report error on foo() instead of foo(void)Stefan Hajnoczi2018-01-291-0/+2
| | | | | | | | | | | | C functions with no arguments must be declared foo(void) instead of foo(). The tracetool argument list parser has never accepted an empty argument list. This patch adds a clear error message for this error case. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180110202553.31889-4-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* tracetool: clarify that "formats" means "format strings"Stefan Hajnoczi2018-01-291-4/+4
| | | | | | | | | | | | | | | | The terminology used by tracetool is not consistent with C sprintf or docs/devel/tracing.txt. The word "formats" is sometimes used to mean "format strings". This patch clarifies comments and error messages that contain this word. Note that the error message lines are longer than 80 characters but I have not wrapped them to aid grepping. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180110202553.31889-3-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* tracetool: prefix parse errors with line numbersStefan Hajnoczi2018-01-291-2/+7
| | | | | | | | | | | | | | | Include the file line number in the message that is printed when trace-events parse errors are raised. [Use enumerate(fobj, 1) to avoid having to increment a 0-based index later, as suggested by Eric Blake. --Stefan] Suggested-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180110202553.31889-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: add TRACE_<event>_BACKEND_DSTATE()Stefan Hajnoczi2017-08-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | QEMU keeps track of trace event enabled/disabled state and provides monitor commands to inspect and modify the "dstate". SystemTap and LTTng UST maintain independent enabled/disabled states for each trace event, the other backends rely on QEMU dstate. Introduce a new per-event macro that combines backend-specific dstate like this: #define TRACE_MY_EVENT_BACKEND_DSTATE() ( \ QEMU_MY_EVENT_ENABLED() || /* SystemTap */ \ tracepoint_enabled(qemu, my_event) /* LTTng UST */ || \ false) This will be used to extend trace_event_get_state() in the next patch. [Daniel Berrange pointed out that QEMU_MY_EVENT_ENABLED() must be true by default, not false. This way events will fire even if the DTrace implementation does not implement the SystemTap semaphores feature. Ubuntu Precise uses lttng-ust-dev 2.0.2 which does not have tracepoint_enabled(), so we need a compatibility wrapper to keep Travis builds passing. --Stefan] Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20170731140718.22010-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> fixup! trace: add TRACE_<event>_BACKEND_DSTATE()
* trace: [tcg] Do not generate TCG code to trace dynamically-disabled eventsLluís Vilanova2017-07-171-1/+2
| | | | | | | | | | | | | | | If an event is dynamically disabled, the TCG code that calls the execution-time tracer is not generated. Removes the overheads of execution-time tracers for dynamically disabled events. As a bonus, also avoids checking the event state when the execution-time tracer is called from TCG-generated code (since otherwise TCG would simply not call it). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Emilio G. Cota <cota@braap.org> Message-id: 149915799921.6295.13067154430923434035.stgit@frigg.lan Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: disallow more than 10 arguments per trace eventDaniel P. Berrange2017-05-081-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The UST trace backend can only cope with upto 10 arguments. To ensure we don't exceed the limit when UST is not compiled in, disallow more than 10 arguments upfront. This prevents the case where: commit 0fc8aec7de64f2bf83a274a2a38b938ce03425d2 Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Date: Tue Apr 18 10:20:20 2017 +0800 COLO-compare: Optimize tcp compare trace event Optimize two trace events as one, adjust print format make it easy to read. rename trace_colo_compare_pkt_info_src/dst to trace_colo_compare_tcp_info. regressed the fix done in commit 2dfe5113b11ce0ddb08176ebb54ab7ac4104b413 Author: Alex Bennée <alex.bennee@linaro.org> Date: Fri Oct 28 14:25:59 2016 +0100 net: split colo_compare_pkt_info into two trace events It seems there is a limit to the number of arguments a UST trace event can take and at 11 the previous trace command broke the build. Split the trace into a src pkt and dst pkt trace to fix this. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20161028132559.8324-1-alex.bennee@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Now we get an immediate fail even when UST is disabled: GEN net/trace.h Traceback (most recent call last): File "/home/berrange/src/virt/qemu/scripts/tracetool.py", line 154, in <module> main(sys.argv) File "/home/berrange/src/virt/qemu/scripts/tracetool.py", line 145, in main events.extend(tracetool.read_events(fh)) File "/home/berrange/src/virt/qemu/scripts/tracetool/__init__.py", line 307, in read_events event = Event.build(line) File "/home/berrange/src/virt/qemu/scripts/tracetool/__init__.py", line 244, in build event = Event(name, props, fmt, args) File "/home/berrange/src/virt/qemu/scripts/tracetool/__init__.py", line 196, in __init__ "argument count" % name) ValueError: Event 'colo_compare_tcp_info' has more than maximum permitted argument count Makefile:96: recipe for target 'net/trace.h-timestamp' failed Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20170426153900.21066-1-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* 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/+3
| | | | | | | | | | | | 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/+2
| | | | | | | | | 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/+33
| | | | | | | 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/+11
| | | | | | | | | | | | | | | 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/+2
| | | | | | | 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>
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