35e28cb0f2
SystemTap's dtrace(1) prints the following warning when it encounters long long arguments: Warning: /usr/bin/dtrace:trace/trace-dtrace-hw_virtio.dtrace:76: syntax error near: probe vhost_vdpa_dev_start Warning: Proceeding as if --no-pyparsing was given. Use the uint64_t and int64_t types, respectively. This works with all host CPU 32- and 64-bit data models (ILP32, LP64, and LLP64) that QEMU supports. Reported-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201020094043.159935-1-stefanha@redhat.com Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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trace/generated-tracers.dtrace (DTrace only).
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2014, 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@redhat.com"
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from tracetool import out
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from sys import platform
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# Reserved keywords from
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# https://wikis.oracle.com/display/DTrace/Types,+Operators+and+Expressions
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RESERVED_WORDS = (
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'auto', 'goto', 'sizeof', 'break', 'if', 'static', 'case', 'import',
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'string', 'char', 'inline', 'stringof', 'const', 'int', 'struct',
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'continue', 'long', 'switch', 'counter', 'offsetof', 'this',
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'default', 'probe', 'translator', 'do', 'provider', 'typedef',
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'double', 'register', 'union', 'else', 'restrict', 'unsigned',
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'enum', 'return', 'void', 'extern', 'self', 'volatile', 'float',
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'short', 'while', 'for', 'signed', 'xlate',
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)
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def generate(events, backend, group):
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events = [e for e in events
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if "disable" not in e.properties]
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# SystemTap's dtrace(1) warns about empty "provider qemu {}" but is happy
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# with an empty file. Avoid the warning.
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# But dtrace on macOS can't deal with empty files.
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if not events and platform != "darwin":
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return
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out('/* This file is autogenerated by tracetool, do not edit. */'
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'',
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'provider qemu {')
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for e in events:
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args = []
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for type_, name in e.args:
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if platform == "darwin":
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# macOS dtrace accepts only C99 _Bool
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if type_ == 'bool':
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type_ = '_Bool'
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if type_ == 'bool *':
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type_ = '_Bool *'
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# It converts int8_t * in probe points to char * in header
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# files and introduces [-Wpointer-sign] warning.
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# Avoid it by changing probe type to signed char * beforehand.
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if type_ == 'int8_t *':
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type_ = 'signed char *'
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# SystemTap dtrace(1) emits a warning when long long is used
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type_ = type_.replace('unsigned long long', 'uint64_t')
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type_ = type_.replace('signed long long', 'int64_t')
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type_ = type_.replace('long long', 'int64_t')
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if name in RESERVED_WORDS:
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name += '_'
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args.append(type_ + ' ' + name)
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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=','.join(args))
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out('',
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'};')
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