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| author | Anthony Liguori <aliguori@us.ibm.com> | 2013-05-03 11:20:15 -0500 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-05-03 11:20:16 -0500 |
| commit | 743bddb4b35ceaaf6f95aea581a4130dcae6205a (patch) | |
| tree | eeabd3f7fd008377db4ea3c8152560718fa427f9 /scripts/tracetool/backend/ftrace.py | |
| parent | a612925b4184fa7aa37092db4fef816030640922 (diff) | |
| parent | e64dd5efb2c6d522a3bc9d096cd49a4e53f0ae10 (diff) | |
| download | hqemu-743bddb4b35ceaaf6f95aea581a4130dcae6205a.zip hqemu-743bddb4b35ceaaf6f95aea581a4130dcae6205a.tar.gz | |
Merge remote-tracking branch 'stefanha/tracing' into staging
# By Eiichi Tsukata (2) and Kazuya Saito (2)
# Via Stefan Hajnoczi
* stefanha/tracing:
trace: document ftrace backend
trace: Add ftrace tracing backend
kvm-all: add kvm_run_exit tracepoint
kvm-all: add kvm_ioctl, kvm_vm_ioctl, kvm_vcpu_ioctl tracepoints
Message-id: 1367582485-15579-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'scripts/tracetool/backend/ftrace.py')
| -rw-r--r-- | scripts/tracetool/backend/ftrace.py | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py new file mode 100644 index 0000000..888c361 --- /dev/null +++ b/scripts/tracetool/backend/ftrace.py @@ -0,0 +1,54 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +""" +Ftrace built-in backend. +""" + +__author__ = "Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>" +__copyright__ = "Copyright (C) 2013 Hitachi, Ltd." +__license__ = "GPL version 2 or (at your option) any later version" + +__maintainer__ = "Stefan Hajnoczi" +__email__ = "stefanha@redhat.com" + + +from tracetool import out + + +PUBLIC = True + + +def c(events): + pass + +def h(events): + out('#include "trace/ftrace.h"', + '#include "trace/control.h"', + '', + ) + + for e in events: + argnames = ", ".join(e.args.names()) + if len(e.args) > 0: + argnames = ", " + argnames + + out('static inline void trace_%(name)s(%(args)s)', + '{', + ' char ftrace_buf[MAX_TRACE_STRLEN];', + ' int unused __attribute__ ((unused));', + ' int trlen;', + ' bool _state = trace_event_get_state(%(event_id)s);', + ' if (_state) {', + ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,', + ' "%(name)s " %(fmt)s "\\n" %(argnames)s);', + ' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);', + ' unused = write(trace_marker_fd, ftrace_buf, trlen);', + ' }', + '}', + name = e.name, + args = e.args, + event_id = "TRACE_" + e.name.upper(), + fmt = e.fmt.rstrip("\n"), + argnames = argnames, + ) |
