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2016-01-07trace: add make dependencies on tracetool sourceStefan Hajnoczi1-11/+19
Patches that change tracetool can break the build if old build output files are lying around. This happens because the Makefile does not specify dependencies on tracetool. The build will use old object files that do not match the current source code. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-01-07trace: fix make foo-timestamp rulesStefan Hajnoczi1-9/+9
The Makefile uses intermediate timestamp files to avoid rebuilding if tracetool output is unchanged. Timestamps are implemented incorrectly. This was fixed for rules.mak in commit 4b25966ab976f3a7fd9008193b2defcc82f8f04d ("rules.mak: cleanup config generation rules") but never fixed in trace/Makefile.objs. The problem with the old timestamp implementation was that make doesn't notice the updated file modification time until the next time it is run. It was necessary to run make twice in a row to achieve a full rebuild. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-26trace: [qmp] Add commands to query and control event tracing stateLluís Vilanova1-0/+1
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 20140825111957.31112.31733.stgit@fimbulvetr.bsc.es Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-09trace: Only link generated-tracers.o with "simple" backendFam Zheng1-2/+1
In any other cases the object file is effectively empty, which is disliked by ranlib and nm on Mac OS X. Reported-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-12trace: [tcg] Generate TCG tracing routinesLluís Vilanova1-0/+9
Generate header "trace/generated-tcg-tracers.h" with the necessary routines for tracing events in guest code: * trace_${event}_tcg Convenience wrapper that calls the translation-time tracer 'trace_${event}_trans', and calls 'gen_helper_trace_${event}_exec to generate the TCG code to later trace the event at execution time. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-12trace: [tcg] Define TCG tracing helper routine wrappersLluís Vilanova1-0/+8
Generates header "trace/generated-helpers-wrappers.h" with definitions for TCG helper wrappers. These wrappers ('gen_helper_trace_${event}_exec_wrapper') transform mixed native and TCG argument types to TCG types and call the actual TCG helpers ('gen_helper_trace_${event}_exec_proxy'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-12trace: [tcg] Define TCG tracing helper routinesLluís Vilanova1-0/+12
Generates file "trace/generated-helpers.c" with TCG helper definitions to trace events in guest code at execution time. The helpers ('helper_trace_${event}_exec_proxy') cast the TCG-compatible native argument types to their original types (as defined in "trace-events") and call the tracing routine ('trace_${event}_exec'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-12trace: [tcg] Declare TCG tracing helper routinesLluís Vilanova1-5/+19
Generates file "trace/generated-helpers.h" with TCG helper declarations to trace events in guest code at execution time ('trace_${event}_exec_proxy'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-06-09trace: Multi-backend tracingLluís Vilanova1-17/+15
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>
2014-05-07trace: [tracetool] Minimize the amount of per-backend codeLluís Vilanova1-2/+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>
2014-02-19Adapt Makefiles to the new LTTng ust interfaceMohamad Gebai1-0/+25
Add generation of new files for LTTng ust. Signed-off-by: Mohamad Gebai <mohamad.gebai@polymtl.ca> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-05-03trace: Add ftrace tracing backendEiichi Tsukata1-0/+1
This patch adds a ftrace tracing backend which sends trace event to ftrace marker file. You can effectively compare qemu trace data and kernel(especially, kvm.ko when using KVM) trace data. The ftrace backend is restricted to Linux only. To try out the ftrace backend: $ ./configure --trace-backend=ftrace $ make if you use KVM, enable kvm events in ftrace: # sudo echo 1 > /sys/kernel/debug/tracing/events/kvm/enable After running qemu by root user, you can get the trace: # cat /sys/kernel/debug/tracing/trace Signed-off-by: Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: rebuild generated-events.o when configuration changesStefan Hajnoczi1-1/+1
Make sure to rebuild generated-events.o when ./configure options change. This prevents linker errors when a stale generated-events.o gets linked with code compiled against fresh headers. For example, try building with ./configure --enable-trace-backend=stderr followed by ./configure --enable-trace-backend=dtrace. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-28trace: Provide a generic tracing event descriptorLluís Vilanova1-1/+23
Uses tracetool to generate a backend-independent tracing event description (struct TraceEvent). The values for such structure are generated with the non-public "events" backend ("events-c" frontend). The generation of the defines to check if an event is statically enabled is also moved to the "events" backend ("events-h" frontend). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-30Makefile: clean timestamp generation ruleMichael S. Tsirkin1-2/+2
create timestamp by rule without sideeffects. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-01-12build: fold trace-obj-y into libqemuutil.aPaolo Bonzini1-5/+5
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-12build: some simplifications for "trace/Makefile.objs"Paolo Bonzini1-13/+13
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-12build: move dtrace rules to rules.makPaolo Bonzini1-12/+0
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-23build: Use separate makefile for "trace/"Lluís Vilanova1-0/+70
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> -- Changes in v2: * Do not depend on "qemu-timer-common.o". * Use "$(obj)" in rules to refer to the build sub-directory. * Remove dependencies against "$(GENERATED_HEADERS)". Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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