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gdb-dts-rhel6-python-compat.patch
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File gdb-dts-rhel6-python-compat.patch of Package gdb
From FEDORA_PATCHES Mon Sep 17 00:00:00 2001 From: Fedora GDB patches <invalid@email.com> Date: Fri, 27 Oct 2017 21:07:50 +0200 Subject: gdb-dts-rhel6-python-compat.patch ;; [rhel6] DTS backward Python compatibility API (BZ 1020004, Phil Muldoon). ;;=fedora https://bugzilla.redhat.com/show_bug.cgi?id=1020004 diff --git a/gdb/data-directory/Makefile.in b/gdb/data-directory/Makefile.in --- a/gdb/data-directory/Makefile.in +++ b/gdb/data-directory/Makefile.in @@ -71,6 +71,8 @@ PYTHON_FILE_LIST = \ gdb/__init__.py \ gdb/FrameDecorator.py \ gdb/FrameIterator.py \ + gdb/FrameWrapper.py \ + gdb/backtrace.py \ gdb/frames.py \ gdb/printing.py \ gdb/prompt.py \ @@ -79,6 +81,7 @@ PYTHON_FILE_LIST = \ gdb/xmethod.py \ gdb/command/__init__.py \ gdb/command/explore.py \ + gdb/command/backtrace.py \ gdb/command/frame_filters.py \ gdb/command/pretty_printers.py \ gdb/command/prompt.py \ diff --git a/gdb/python/lib/gdb/FrameWrapper.py b/gdb/python/lib/gdb/FrameWrapper.py new file mode 100644 --- /dev/null +++ b/gdb/python/lib/gdb/FrameWrapper.py @@ -0,0 +1,122 @@ +# Wrapper API for frames. + +# Copyright (C) 2008, 2009 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +import gdb + +# FIXME: arguably all this should be on Frame somehow. +class FrameWrapper: + def __init__ (self, frame): + self.frame = frame; + + def write_symbol (self, stream, sym, block): + if len (sym.linkage_name): + nsym, is_field_of_this = gdb.lookup_symbol (sym.linkage_name, block) + if nsym.addr_class != gdb.SYMBOL_LOC_REGISTER: + sym = nsym + + stream.write (sym.print_name + "=") + try: + val = self.read_var (sym) + if val != None: + val = str (val) + # FIXME: would be nice to have a more precise exception here. + except RuntimeError as text: + val = text + if val == None: + stream.write ("???") + else: + stream.write (str (val)) + + def print_frame_locals (self, stream, func): + + try: + block = self.frame.block() + except RuntimeError: + block = None + + while block != None: + if block.is_global or block.is_static: + break + + for sym in block: + if sym.is_argument: + continue; + + self.write_symbol (stream, sym, block) + stream.write ('\n') + + def print_frame_args (self, stream, func): + + try: + block = self.frame.block() + except RuntimeError: + block = None + + while block != None: + if block.function != None: + break + block = block.superblock + + first = True + for sym in block: + if not sym.is_argument: + continue; + + if not first: + stream.write (", ") + + self.write_symbol (stream, sym, block) + first = False + + # FIXME: this should probably just be a method on gdb.Frame. + # But then we need stream wrappers. + def describe (self, stream, full): + if self.type () == gdb.DUMMY_FRAME: + stream.write (" <function called from gdb>\n") + elif self.type () == gdb.SIGTRAMP_FRAME: + stream.write (" <signal handler called>\n") + else: + sal = self.find_sal () + pc = self.pc () + name = self.name () + if not name: + name = "??" + if pc != sal.pc or not sal.symtab: + stream.write (" 0x%08x in" % pc) + stream.write (" " + name + " (") + + func = self.function () + self.print_frame_args (stream, func) + + stream.write (")") + + if sal.symtab and sal.symtab.filename: + stream.write (" at " + sal.symtab.filename) + stream.write (":" + str (sal.line)) + + if not self.name () or (not sal.symtab or not sal.symtab.filename): + lib = gdb.solib_name (pc) + if lib: + stream.write (" from " + lib) + + stream.write ("\n") + + if full: + self.print_frame_locals (stream, func) + + def __getattr__ (self, name): + return getattr (self.frame, name) diff --git a/gdb/python/lib/gdb/backtrace.py b/gdb/python/lib/gdb/backtrace.py new file mode 100644 --- /dev/null +++ b/gdb/python/lib/gdb/backtrace.py @@ -0,0 +1,42 @@ +# Filtering backtrace. + +# Copyright (C) 2008, 2011 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +import gdb +import itertools + +# Our only exports. +__all__ = ['push_frame_filter', 'create_frame_filter'] + +old_frame_filter = None + +def push_frame_filter (constructor): + """Register a new backtrace filter class with the 'backtrace' command. +The filter will be passed an iterator as an argument. The iterator +will return gdb.Frame-like objects. The filter should in turn act as +an iterator returning such objects.""" + global old_frame_filter + if old_frame_filter == None: + old_frame_filter = constructor + else: + old_frame_filter = lambda iterator, filter = frame_filter: constructor (filter(iterator)) + +def create_frame_filter (iter): + global old_frame_filter + if old_frame_filter is None: + return iter + return old_frame_filter (iter) + diff --git a/gdb/python/lib/gdb/command/backtrace.py b/gdb/python/lib/gdb/command/backtrace.py new file mode 100644 --- /dev/null +++ b/gdb/python/lib/gdb/command/backtrace.py @@ -0,0 +1,106 @@ +# New backtrace command. + +# Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +import gdb +import gdb.backtrace +import itertools +from gdb.FrameIterator import FrameIterator +from gdb.FrameWrapper import FrameWrapper +import sys + +class ReverseBacktraceParameter (gdb.Parameter): + """The new-backtrace command can show backtraces in 'reverse' order. +This means that the innermost frame will be printed last. +Note that reverse backtraces are more expensive to compute.""" + + set_doc = "Enable or disable reverse backtraces." + show_doc = "Show whether backtraces will be printed in reverse order." + + def __init__(self): + gdb.Parameter.__init__ (self, "reverse-backtrace", + gdb.COMMAND_STACK, gdb.PARAM_BOOLEAN) + # Default to compatibility with gdb. + self.value = False + +class FilteringBacktrace (gdb.Command): + """Print backtrace of all stack frames, or innermost COUNT frames. +With a negative argument, print outermost -COUNT frames. +Use of the 'full' qualifier also prints the values of the local variables. +Use of the 'raw' qualifier avoids any filtering by loadable modules. +""" + + def __init__ (self): + # FIXME: this is not working quite well enough to replace + # "backtrace" yet. + gdb.Command.__init__ (self, "new-backtrace", gdb.COMMAND_STACK) + self.reverse = ReverseBacktraceParameter() + + def reverse_iter (self, iter): + result = [] + for item in iter: + result.append (item) + result.reverse() + return result + + def final_n (self, iter, x): + result = [] + for item in iter: + result.append (item) + return result[x:] + + def invoke (self, arg, from_tty): + i = 0 + count = 0 + filter = True + full = False + + for word in arg.split (" "): + if word == '': + continue + elif word == 'raw': + filter = False + elif word == 'full': + full = True + else: + count = int (word) + + # FIXME: provide option to start at selected frame + # However, should still number as if starting from newest + newest_frame = gdb.newest_frame() + iter = itertools.imap (FrameWrapper, + FrameIterator (newest_frame)) + if filter: + iter = gdb.backtrace.create_frame_filter (iter) + + # Now wrap in an iterator that numbers the frames. + iter = itertools.izip (itertools.count (0), iter) + + # Reverse if the user wanted that. + if self.reverse.value: + iter = self.reverse_iter (iter) + + # Extract sub-range user wants. + if count < 0: + iter = self.final_n (iter, count) + elif count > 0: + iter = itertools.islice (iter, 0, count) + + for pair in iter: + sys.stdout.write ("#%-2d" % pair[0]) + pair[1].describe (sys.stdout, full) + +FilteringBacktrace()
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