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From 13f5df42cd4ccb6d199305b1c82bdd6d39403ae8 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Tue, 7 Oct 2014 14:06:56 +0200
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Subject: [PATCH 38/43] trace: install simpletrace SystemTap tapset
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Message-id: <1412690820-31016-8-git-send-email-stefanha@redhat.com>
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Patchwork-id: 61612
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O-Subject: [RHEL7.1 qemu-kvm PATCH 07/11] trace: install simpletrace SystemTap tapset
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Bugzilla: 1088112
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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The simpletrace SystemTap tapset outputs simpletrace binary traces for
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SystemTap probes. This is useful because SystemTap has no default way
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to format or store traces. The simpletrace SystemTap tapset provides an
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easy way to store traces.
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The simpletrace.py tool or custom Python scripts using the
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simpletrace.py API can analyze SystemTap these traces:
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$ ./configure --enable-trace-backends=dtrace ...
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$ make && make install
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$ stap -e 'probe qemu.system.x86_64.simpletrace.* {}' \
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-c qemu-system-x86_64 >/tmp/trace.out
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$ scripts/simpletrace.py --no-header trace-events /tmp/trace.out
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g_malloc 4.531 pid=15519 size=0xb ptr=0x7f8639c10470
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g_malloc 3.264 pid=15519 size=0x300 ptr=0x7f8639c10490
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g_free 5.155 pid=15519 ptr=0x7f8639c0f7b0
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Note that, unlike qemu-system-x86_64.stp and
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qemu-system-x86_64.stp-installed, only one file is needed since the
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simpletrace SystemTap tapset does not reference the QEMU binary by path.
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Therefore it doesn't matter whether the QEMU binary is installed or not.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit e0b2fd0efb4d282bc6fa0ed5397f472298a66ca2)
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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Conflicts:
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Makefile.target
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Downstream does not have .stp-installed, which was added upstream to
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differentiate between .stp files that can be used in the build tree and
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.stp files that can be used after make install. Context conflict.
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Also note that downstream uses --backend=$(TRACE_BACKEND) instead of
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--backends=$(TRACE_BACKENDS).
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Downstream needs to install the qemu-kvm-simpletrace.stp file right away
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to avoid rpm check "unpackaged file" errors, so modify
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qemu-kvm.spec.template.
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---
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Makefile.target | 11 ++++++++++-
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redhat/qemu-kvm.spec.template | 10 +++++++++-
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2 files changed, 19 insertions(+), 2 deletions(-)
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diff --git a/Makefile.target b/Makefile.target
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index b871dda..ca407d7 100644
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--- a/Makefile.target
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+++ b/Makefile.target
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@@ -35,7 +35,7 @@ config-target.h: config-target.h-timestamp
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config-target.h-timestamp: config-target.mak
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ifdef CONFIG_TRACE_SYSTEMTAP
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-stap: $(QEMU_PROG).stp
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+stap: $(QEMU_PROG).stp $(QEMU_PROG)-simpletrace.stp
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ifdef CONFIG_USER_ONLY
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TARGET_TYPE=user
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@@ -51,6 +51,14 @@ $(QEMU_PROG).stp: $(SRC_PATH)/trace-events
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--target-arch=$(TARGET_ARCH) \
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--target-type=$(TARGET_TYPE) \
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< $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG).stp")
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+
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+$(QEMU_PROG)-simpletrace.stp: $(SRC_PATH)/trace-events
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+ $(call quiet-command,$(TRACETOOL) \
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+ --format=simpletrace-stap \
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+ --backend=$(TRACE_BACKEND) \
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+ --probe-prefix=qemu.$(TARGET_TYPE).$(TARGET_ARCH) \
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+ < $< > $@," GEN $(TARGET_DIR)$(QEMU_PROG)-simpletrace.stp")
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+
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else
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stap:
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endif
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@@ -194,6 +202,7 @@ endif
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ifdef CONFIG_TRACE_SYSTEMTAP
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$(INSTALL_DIR) "$(DESTDIR)$(qemu_datadir)/../systemtap/tapset"
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$(INSTALL_DATA) $(QEMU_PROG).stp "$(DESTDIR)$(qemu_datadir)/../systemtap/tapset"
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+ $(INSTALL_DATA) $(QEMU_PROG)-simpletrace.stp "$(DESTDIR)$(qemu_datadir)/../systemtap/tapset/$(QEMU_PROG)-simpletrace.stp"
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endif
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GENERATED_HEADERS += config-target.h
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--
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1.8.3.1
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