Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 366 insertions, 0 deletions

diff --git a/qemu/scripts/tracetool/__init__.py b/qemu/scripts/tracetool/__init__.py
new file mode 100644
index 000000000..181675f00
--- /dev/null
+++ b/qemu/scripts/tracetool/__init__.py
@@ -0,0 +1,366 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Machinery for generating tracing-related intermediate files.
+"""
+
+__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__license__    = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__      = "stefanha@linux.vnet.ibm.com"
+
+
+import re
+import sys
+import weakref
+
+import tracetool.format
+import tracetool.backend
+import tracetool.transform
+
+
+def error_write(*lines):
+    """Write a set of error lines."""
+    sys.stderr.writelines("\n".join(lines) + "\n")
+
+def error(*lines):
+    """Write a set of error lines and exit."""
+    error_write(*lines)
+    sys.exit(1)
+
+
+def out(*lines, **kwargs):
+    """Write a set of output lines.
+
+    You can use kwargs as a shorthand for mapping variables when formating all
+    the strings in lines.
+    """
+    lines = [ l % kwargs for l in lines ]
+    sys.stdout.writelines("\n".join(lines) + "\n")
+
+
+class Arguments:
+    """Event arguments description."""
+
+    def __init__(self, args):
+        """
+        Parameters
+        ----------
+        args :
+            List of (type, name) tuples.
+        """
+        self._args = args
+
+    def copy(self):
+        """Create a new copy."""
+        return Arguments(list(self._args))
+
+    @staticmethod
+    def build(arg_str):
+        """Build and Arguments instance from an argument string.
+
+        Parameters
+        ----------
+        arg_str : str
+            String describing the event arguments.
+        """
+        res = []
+        for arg in arg_str.split(","):
+            arg = arg.strip()
+            if arg == 'void':
+                continue
+
+            if '*' in arg:
+                arg_type, identifier = arg.rsplit('*', 1)
+                arg_type += '*'
+                identifier = identifier.strip()
+            else:
+                arg_type, identifier = arg.rsplit(None, 1)
+
+            res.append((arg_type, identifier))
+        return Arguments(res)
+
+    def __iter__(self):
+        """Iterate over the (type, name) pairs."""
+        return iter(self._args)
+
+    def __len__(self):
+        """Number of arguments."""
+        return len(self._args)
+
+    def __str__(self):
+        """String suitable for declaring function arguments."""
+        if len(self._args) == 0:
+            return "void"
+        else:
+            return ", ".join([ " ".join([t, n]) for t,n in self._args ])
+
+    def __repr__(self):
+        """Evaluable string representation for this object."""
+        return "Arguments(\"%s\")" % str(self)
+
+    def names(self):
+        """List of argument names."""
+        return [ name for _, name in self._args ]
+
+    def types(self):
+        """List of argument types."""
+        return [ type_ for type_, _ in self._args ]
+
+    def transform(self, *trans):
+        """Return a new Arguments instance with transformed types.
+
+        The types in the resulting Arguments instance are transformed according
+        to tracetool.transform.transform_type.
+        """
+        res = []
+        for type_, name in self._args:
+            res.append((tracetool.transform.transform_type(type_, *trans),
+                        name))
+        return Arguments(res)
+
+
+class Event(object):
+    """Event description.
+
+    Attributes
+    ----------
+    name : str
+        The event name.
+    fmt : str
+        The event format string.
+    properties : set(str)
+        Properties of the event.
+    args : Arguments
+        The event arguments.
+
+    """
+
+    _CRE = re.compile("((?P<props>[\w\s]+)\s+)?"
+                      "(?P<name>\w+)"
+                      "\((?P<args>[^)]*)\)"
+                      "\s*"
+                      "(?:(?:(?P<fmt_trans>\".+),)?\s*(?P<fmt>\".+))?"
+                      "\s*")
+
+    _VALID_PROPS = set(["disable", "tcg", "tcg-trans", "tcg-exec"])
+
+    def __init__(self, name, props, fmt, args, orig=None):
+        """
+        Parameters
+        ----------
+        name : string
+            Event name.
+        props : list of str
+            Property names.
+        fmt : str, list of str
+            Event printing format (or formats).
+        args : Arguments
+            Event arguments.
+        orig : Event or None
+            Original Event before transformation.
+
+        """
+        self.name = name
+        self.properties = props
+        self.fmt = fmt
+        self.args = args
+
+        if orig is None:
+            self.original = weakref.ref(self)
+        else:
+            self.original = orig
+
+        unknown_props = set(self.properties) - self._VALID_PROPS
+        if len(unknown_props) > 0:
+            raise ValueError("Unknown properties: %s"
+                             % ", ".join(unknown_props))
+        assert isinstance(self.fmt, str) or len(self.fmt) == 2
+
+    def copy(self):
+        """Create a new copy."""
+        return Event(self.name, list(self.properties), self.fmt,
+                     self.args.copy(), self)
+
+    @staticmethod
+    def build(line_str):
+        """Build an Event instance from a string.
+
+        Parameters
+        ----------
+        line_str : str
+            Line describing the event.
+        """
+        m = Event._CRE.match(line_str)
+        assert m is not None
+        groups = m.groupdict('')
+
+        name = groups["name"]
+        props = groups["props"].split()
+        fmt = groups["fmt"]
+        fmt_trans = groups["fmt_trans"]
+        if len(fmt_trans) > 0:
+            fmt = [fmt_trans, fmt]
+        args = Arguments.build(groups["args"])
+
+        if "tcg-trans" in props:
+            raise ValueError("Invalid property 'tcg-trans'")
+        if "tcg-exec" in props:
+            raise ValueError("Invalid property 'tcg-exec'")
+        if "tcg" not in props and not isinstance(fmt, str):
+            raise ValueError("Only events with 'tcg' property can have two formats")
+        if "tcg" in props and isinstance(fmt, str):
+            raise ValueError("Events with 'tcg' property must have two formats")
+
+        return Event(name, props, fmt, args)
+
+    def __repr__(self):
+        """Evaluable string representation for this object."""
+        if isinstance(self.fmt, str):
+            fmt = self.fmt
+        else:
+            fmt = "%s, %s" % (self.fmt[0], self.fmt[1])
+        return "Event('%s %s(%s) %s')" % (" ".join(self.properties),
+                                          self.name,
+                                          self.args,
+                                          fmt)
+
+    _FMT = re.compile("(%[\d\.]*\w+|%.*PRI\S+)")
+
+    def formats(self):
+        """List of argument print formats."""
+        assert not isinstance(self.fmt, list)
+        return self._FMT.findall(self.fmt)
+
+    QEMU_TRACE               = "trace_%(name)s"
+    QEMU_TRACE_TCG           = QEMU_TRACE + "_tcg"
+
+    def api(self, fmt=None):
+        if fmt is None:
+            fmt = Event.QEMU_TRACE
+        return fmt % {"name": self.name}
+
+    def transform(self, *trans):
+        """Return a new Event with transformed Arguments."""
+        return Event(self.name,
+                     list(self.properties),
+                     self.fmt,
+                     self.args.transform(*trans),
+                     self)
+
+
+def _read_events(fobj):
+    events = []
+    for line in fobj:
+        if not line.strip():
+            continue
+        if line.lstrip().startswith('#'):
+            continue
+
+        event = Event.build(line)
+
+        # transform TCG-enabled events
+        if "tcg" not in event.properties:
+            events.append(event)
+        else:
+            event_trans = event.copy()
+            event_trans.name += "_trans"
+            event_trans.properties += ["tcg-trans"]
+            event_trans.fmt = event.fmt[0]
+            args_trans = []
+            for atrans, aorig in zip(
+                    event_trans.transform(tracetool.transform.TCG_2_HOST).args,
+                    event.args):
+                if atrans == aorig:
+                    args_trans.append(atrans)
+            event_trans.args = Arguments(args_trans)
+            event_trans = event_trans.copy()
+
+            event_exec = event.copy()
+            event_exec.name += "_exec"
+            event_exec.properties += ["tcg-exec"]
+            event_exec.fmt = event.fmt[1]
+            event_exec = event_exec.transform(tracetool.transform.TCG_2_HOST)
+
+            new_event = [event_trans, event_exec]
+            event.event_trans, event.event_exec = new_event
+
+            events.extend(new_event)
+
+    return events
+
+
+class TracetoolError (Exception):
+    """Exception for calls to generate."""
+    pass
+
+
+def try_import(mod_name, attr_name=None, attr_default=None):
+    """Try to import a module and get an attribute from it.
+
+    Parameters
+    ----------
+    mod_name : str
+        Module name.
+    attr_name : str, optional
+        Name of an attribute in the module.
+    attr_default : optional
+        Default value if the attribute does not exist in the module.
+
+    Returns
+    -------
+    A pair indicating whether the module could be imported and the module or
+    object or attribute value.
+    """
+    try:
+        module = __import__(mod_name, globals(), locals(), ["__package__"])
+        if attr_name is None:
+            return True, module
+        return True, getattr(module, str(attr_name), attr_default)
+    except ImportError:
+        return False, None
+
+
+def generate(fevents, format, backends,
+             binary=None, probe_prefix=None):
+    """Generate the output for the given (format, backends) pair.
+
+    Parameters
+    ----------
+    fevents : file
+        Event description file.
+    format : str
+        Output format name.
+    backends : list
+        Output backend names.
+    binary : str or None
+        See tracetool.backend.dtrace.BINARY.
+    probe_prefix : str or None
+        See tracetool.backend.dtrace.PROBEPREFIX.
+    """
+    # fix strange python error (UnboundLocalError tracetool)
+    import tracetool
+
+    format = str(format)
+    if len(format) is 0:
+        raise TracetoolError("format not set")
+    if not tracetool.format.exists(format):
+        raise TracetoolError("unknown format: %s" % format)
+
+    if len(backends) is 0:
+        raise TracetoolError("no backends specified")
+    for backend in backends:
+        if not tracetool.backend.exists(backend):
+            raise TracetoolError("unknown backend: %s" % backend)
+    backend = tracetool.backend.Wrapper(backends, format)
+
+    import tracetool.backend.dtrace
+    tracetool.backend.dtrace.BINARY = binary
+    tracetool.backend.dtrace.PROBEPREFIX = probe_prefix
+
+    events = _read_events(fevents)
+
+    tracetool.format.generate(events, format, backend)