eac236ea7b
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>
107 lines
2.4 KiB
Python
107 lines
2.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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DTrace/SystemTAP backend.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@linux.vnet.ibm.com"
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from tracetool import out
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PROBEPREFIX = None
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def _probeprefix():
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if PROBEPREFIX is None:
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raise ValueError("you must set PROBEPREFIX")
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return PROBEPREFIX
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BINARY = None
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def _binary():
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if BINARY is None:
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raise ValueError("you must set BINARY")
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return BINARY
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def c(events):
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pass
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def h(events):
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out('#include "trace/generated-tracers-dtrace.h"',
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'')
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for e in events:
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out('static inline void trace_%(name)s(%(args)s) {',
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' QEMU_%(uppername)s(%(argnames)s);',
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'}',
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name = e.name,
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args = e.args,
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uppername = e.name.upper(),
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argnames = ", ".join(e.args.names()),
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)
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def d(events):
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out('provider qemu {')
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for e in events:
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args = str(e.args)
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# DTrace provider syntax expects foo() for empty
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# params, not foo(void)
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if args == 'void':
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args = ''
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# Define prototype for probe arguments
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out('',
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'probe %(name)s(%(args)s);',
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name = e.name,
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args = args,
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)
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out('',
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'};')
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# Technically 'self' is not used by systemtap yet, but
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# they recommended we keep it in the reserved list anyway
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RESERVED_WORDS = (
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'break', 'catch', 'continue', 'delete', 'else', 'for',
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'foreach', 'function', 'global', 'if', 'in', 'limit',
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'long', 'next', 'probe', 'return', 'self', 'string',
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'try', 'while'
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)
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def stap(events):
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for e in events:
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# Define prototype for probe arguments
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out('probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")',
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'{',
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probeprefix = _probeprefix(),
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name = e.name,
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binary = _binary(),
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)
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i = 1
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if len(e.args) > 0:
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for name in e.args.names():
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# Append underscore to reserved keywords
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if name in RESERVED_WORDS:
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name += '_'
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out(' %s = $arg%d;' % (name, i))
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i += 1
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out('}')
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out()
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