48e88e8e19
- kvm-hw-virtio-virtio-iommu-Migrate-to-3-phase-reset.patch [RHEL-7188] - kvm-hw-i386-intel-iommu-Migrate-to-3-phase-reset.patch [RHEL-7188] - kvm-hw-arm-smmuv3-Move-reset-to-exit-phase.patch [RHEL-7188] - kvm-hw-vfio-common-Add-a-trace-point-in-vfio_reset_handl.patch [RHEL-7188] - kvm-docs-devel-reset-Document-reset-expectations-for-DMA.patch [RHEL-7188] - kvm-qga-implement-a-guest-get-load-command.patch [RHEL-69622] - kvm-migration-Fix-UAF-for-incoming-migration-on-Migratio.patch [RHEL-69775] - kvm-scripts-improve-error-from-qemu-trace-stap-on-missin.patch [RHEL-47340] - kvm-Recommend-systemtap-client-from-qemu-tools.patch [RHEL-47340] - Resolves: RHEL-7188 ([intel iommu][PF] DMAR: DRHD: handling fault status reg) - Resolves: RHEL-69622 ([qemu-guest-agent][RFE] Report CPU load average) - Resolves: RHEL-69775 (Guest crashed on the target host when the migration was canceled) - Resolves: RHEL-47340 ([Qemu RHEL-9] qemu-trace-stap should handle lack of stap more gracefully)
91 lines
3.3 KiB
Diff
91 lines
3.3 KiB
Diff
From 314804fa4be6d653a7809b64076d4f3133a0ff59 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Fri, 6 Dec 2024 11:45:24 +0000
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Subject: [PATCH 8/9] scripts: improve error from qemu-trace-stap on missing
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'stap'
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Daniel P. Berrangé <berrange@redhat.com>
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RH-MergeRequest: 345: scripts: improve error from qemu-trace-stap on missing 'stap'
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RH-Jira: RHEL-47340
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RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Commit: [1/2] c90635123f40e683488d83b59c71a5236c6d4659 (berrange/centos-src-qemu)
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If the 'stap' binary is missing in $PATH, a huge trace is thrown
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$ qemu-trace-stap list /usr/bin/qemu-system-x86_64
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Traceback (most recent call last):
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File "/usr/bin/qemu-trace-stap", line 169, in <module>
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main()
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File "/usr/bin/qemu-trace-stap", line 165, in main
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args.func(args)
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File "/usr/bin/qemu-trace-stap", line 83, in cmd_run
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subprocess.call(stapargs)
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File "/usr/lib64/python3.12/subprocess.py", line 389, in call
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with Popen(*popenargs, **kwargs) as p:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File "/usr/lib64/python3.12/subprocess.py", line 1026, in {}init{}
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self._execute_child(args, executable, preexec_fn, close_fds,
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File "/usr/lib64/python3.12/subprocess.py", line 1955, in _execute_child
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raise child_exception_type(errno_num, err_msg, err_filename)
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FileNotFoundError: [Errno 2] No such file or directory: 'stap'
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With this change the user now gets
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$ qemu-trace-stap list /usr/bin/qemu-system-x86_64
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Unable to find 'stap' in $PATH
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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Message-id: 20241206114524.1666664-1-berrange@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 9976be3911a2d0503f026ae37c17077273bf30ee)
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---
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scripts/qemu-trace-stap | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/scripts/qemu-trace-stap b/scripts/qemu-trace-stap
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index eb6e951ff2..e983460ee7 100755
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--- a/scripts/qemu-trace-stap
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+++ b/scripts/qemu-trace-stap
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@@ -56,6 +56,7 @@ def tapset_dir(binary):
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def cmd_run(args):
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+ stap = which("stap")
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prefix = probe_prefix(args.binary)
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tapsets = tapset_dir(args.binary)
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@@ -76,7 +77,7 @@ def cmd_run(args):
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# We request an 8MB buffer, since the stap default 1MB buffer
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# can be easily overflowed by frequently firing QEMU traces
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- stapargs = ["stap", "-s", "8", "-I", tapsets ]
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+ stapargs = [stap, "-s", "8", "-I", tapsets ]
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if args.pid is not None:
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stapargs.extend(["-x", args.pid])
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stapargs.extend(["-e", script])
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@@ -84,6 +85,7 @@ def cmd_run(args):
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def cmd_list(args):
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+ stap = which("stap")
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tapsets = tapset_dir(args.binary)
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if args.verbose:
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@@ -96,7 +98,7 @@ def cmd_list(args):
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if verbose:
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print("Listing probes with name '%s'" % script)
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- proc = subprocess.Popen(["stap", "-I", tapsets, "-l", script],
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+ proc = subprocess.Popen([stap, "-I", tapsets, "-l", script],
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stdout=subprocess.PIPE,
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universal_newlines=True)
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out, err = proc.communicate()
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--
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2.48.1
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