mirror of
https://git.savannah.gnu.org/git/make.git
synced 2024-11-24 12:19:02 +00:00
* make-gdb.py: Add pretty-printers and clean up.
Create a pretty-printer for next-pointer lists. Create a pretty-printer for stringlists. Change showargv from a function to a command (easier to use). Clean up some Python PEP violations. Add support for testing null pointers and caching gdb.Types.
This commit is contained in:
Paul Smith
parent
7c4e6b0299
commit
e13fd5c83d
1 changed files with 134 additions and 28 deletions
162
make-gdb.py
162
make-gdb.py
|
|
@ -1,11 +1,15 @@
|
|||
import re
|
||||
"""GDB pretty-printer macros for GNU make."""
|
||||
|
||||
import gdb # pylint: disable=import-error
|
||||
import gdb.printing # pylint: disable=import-error
|
||||
|
||||
import gdb #pylint: disable=import-error
|
||||
import gdb.printing #pylint: disable=import-error
|
||||
|
||||
# Memoize types we commonly use
|
||||
_TYPES = {}
|
||||
|
||||
|
||||
def getType(tname):
|
||||
"""Given a type name return a GDB type."""
|
||||
global _TYPES
|
||||
if tname not in _TYPES:
|
||||
tn = tname.rstrip('*')
|
||||
|
|
@ -18,48 +22,129 @@ def getType(tname):
|
|||
_TYPES[tn] = _TYPES[t].pointer()
|
||||
return _TYPES[tname]
|
||||
|
||||
class ShowArgv(gdb.Function):
|
||||
"""Return the pretty-print of a null-terminated array of strings
|
||||
|
||||
def isNullptr(val):
|
||||
"""Return True if the value is a null pointer."""
|
||||
return int(val.cast(getType('unsigned long long'))) == 0
|
||||
|
||||
|
||||
class ShowArgv(gdb.Command):
|
||||
"""Print a null-terminated array of strings.
|
||||
|
||||
Argument:
|
||||
A char** where the last one is NULL (e.g., argv)
|
||||
"""
|
||||
|
||||
def __init__(self):
|
||||
gdb.Function.__init__(self, "showargv")
|
||||
"""Create the showargv function."""
|
||||
gdb.Command.__init__(self, "showargv", gdb.COMMAND_USER)
|
||||
|
||||
def invoke(self, arg, from_tty):
|
||||
"""Show the argv."""
|
||||
args = gdb.string_to_argv(arg)
|
||||
if len(args) != 1:
|
||||
raise gdb.GdbError(self._usage)
|
||||
|
||||
val = gdb.parse_and_eval(args[0])
|
||||
if val is None:
|
||||
raise gdb.GdbError('%s is not a valid expression' % (args[0]))
|
||||
|
||||
strs = []
|
||||
while not isNullptr(val.dereference()):
|
||||
strs.append('"'+val.dereference().string()+'"')
|
||||
val += 1
|
||||
|
||||
gdb.write("[%d] = [%s]\n" % (len(strs), ', '.join(strs)))
|
||||
gdb.flush()
|
||||
|
||||
def invoke(self, argv):
|
||||
str = '['
|
||||
i = 0
|
||||
while argv[i] != 0:
|
||||
if i > 0:
|
||||
str += ', '
|
||||
str += argv[i].string()
|
||||
i += 1
|
||||
str += ']'
|
||||
return str
|
||||
|
||||
ShowArgv()
|
||||
|
||||
|
||||
class ShowNextList(gdb.Command):
|
||||
"""Print a structure that has a "next" pointer.
|
||||
|
||||
Argument:
|
||||
A pointer to a struct which contains a "next" member.
|
||||
"""
|
||||
|
||||
_usage = 'usage: showlist <listptr>'
|
||||
|
||||
def __init__(self):
|
||||
"""Create a "showlist" function."""
|
||||
gdb.Command.__init__(self, "showlist", gdb.COMMAND_USER)
|
||||
|
||||
def invoke(self, arg, from_tty):
|
||||
"""Show the elements in the provided list."""
|
||||
args = gdb.string_to_argv(arg)
|
||||
if len(args) != 1:
|
||||
raise gdb.GdbError(self._usage)
|
||||
|
||||
val = gdb.parse_and_eval(args[0])
|
||||
if val is None:
|
||||
raise gdb.GdbError('%s is not a valid expression' % (args[0]))
|
||||
i = 0
|
||||
while not isNullptr(val):
|
||||
gdb.write("%s : %s\n" % (val, val.dereference()))
|
||||
gdb.flush()
|
||||
i += 1
|
||||
val = val['next']
|
||||
gdb.write("%s contains %d elements\n" % (args[0], i))
|
||||
gdb.flush()
|
||||
|
||||
|
||||
ShowNextList()
|
||||
|
||||
|
||||
class FileLocation(object):
|
||||
"""Print a file location"""
|
||||
"""Print a file location."""
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a FileLocation object."""
|
||||
self.val = val
|
||||
|
||||
def to_string(self):
|
||||
if long(self.val['filenm']):
|
||||
"""Convert a FileLocation to a string."""
|
||||
if int(self.val['filenm']):
|
||||
return "%s:%d" % (str(self.val['filenm']), self.val['lineno'])
|
||||
return ''
|
||||
return 'NILF'
|
||||
|
||||
|
||||
class StringListPrinter(object):
|
||||
"""Print a stringlist."""
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a StringListPrinter object."""
|
||||
self.val = val
|
||||
|
||||
def to_string(self):
|
||||
"""Convert a HashTable into a string."""
|
||||
return "size=%d, capacity=%d" % (self.val['idx'], self.val['max'])
|
||||
|
||||
def children(self):
|
||||
"""Yield each string in the list."""
|
||||
i = 0
|
||||
elts = self.val['list']
|
||||
while i < self.val['idx']:
|
||||
nm = '[%d] ' % i
|
||||
yield (nm, elts.dereference())
|
||||
i += 1
|
||||
elts += 1
|
||||
|
||||
def display_hint(self):
|
||||
"""Show the display hint for the pretty-printer."""
|
||||
return 'array'
|
||||
|
||||
|
||||
class VariablePrinter(object):
|
||||
"""Print a struct variable"""
|
||||
"""Print a struct variable."""
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a VariablePrinter object."""
|
||||
self.val = val
|
||||
|
||||
def to_string(self):
|
||||
"""Convert a VariablePrinter object into a string."""
|
||||
if self.val['append']:
|
||||
a = '+='
|
||||
elif self.val['conditional']:
|
||||
|
|
@ -80,48 +165,58 @@ class VariablePrinter(object):
|
|||
self.val['fileinfo'], ','.join(flags),
|
||||
self.val['name'].string(), a, self.val['value'].string())
|
||||
|
||||
|
||||
class HashTablePrinter(object):
|
||||
"""Manage a hash table."""
|
||||
"""Pretty-print a hash table."""
|
||||
|
||||
DELITEM = None
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a HashTablePrinter object."""
|
||||
self.val = val
|
||||
|
||||
def to_string(self):
|
||||
"""Convert a HashTable into a string."""
|
||||
return "size=%d, capacity=%d, empty=%d, collisions=%d, rehashes=%d" % (
|
||||
self.val['ht_size'], self.val['ht_capacity'],
|
||||
self.val['ht_empty_slots'], self.val['ht_collisions'],
|
||||
self.val['ht_rehashes'])
|
||||
|
||||
def children(self):
|
||||
"""Yield each ID and value."""
|
||||
for (i, v) in self.iterator():
|
||||
nm = '[%d] ' % i
|
||||
yield (nm, i)
|
||||
yield (nm, v)
|
||||
|
||||
def iterator(self):
|
||||
"""Provide an iterator for HashTable."""
|
||||
if HashTablePrinter.DELITEM is None:
|
||||
HashTablePrinter.DELITEM = gdb.lookup_global_symbol('hash_deleted_item').value()
|
||||
lst = self.val['ht_vec']
|
||||
for i in xrange(0, self.val['ht_size']):
|
||||
for i in range(0, self.val['ht_size']):
|
||||
v = lst[i]
|
||||
if long(v) != 0 and v != HashTablePrinter.DELITEM:
|
||||
if int(v) != 0 and v != HashTablePrinter.DELITEM:
|
||||
yield (i, v)
|
||||
|
||||
def display_hint(self):
|
||||
"""Show the display hint for the pretty-printer."""
|
||||
return 'map'
|
||||
|
||||
|
||||
class VariableSetPrinter(object):
|
||||
"""Print a variable_set"""
|
||||
"""Print a variable_set."""
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a variable_set pretty-printer."""
|
||||
self.tbl = HashTablePrinter(val['table'])
|
||||
|
||||
def to_string(self):
|
||||
"""Convert a variable_set to string."""
|
||||
return self.tbl.to_string()
|
||||
|
||||
def children(self):
|
||||
"""Iterate through variables and values."""
|
||||
for (i, v) in self.tbl.iterator():
|
||||
ptr = v.cast(getType('struct variable*'))
|
||||
nm = '[%d] ' % (i)
|
||||
|
|
@ -129,29 +224,35 @@ class VariableSetPrinter(object):
|
|||
yield (nm, str(ptr.dereference()))
|
||||
|
||||
def display_hint(self):
|
||||
"""Show the display hint for the pretty-printer."""
|
||||
return 'map'
|
||||
|
||||
|
||||
class VariableSetListPrinter(object):
|
||||
"""Print a variable_set_list"""
|
||||
"""Print a variable_set_list."""
|
||||
|
||||
GLOBALSET = None
|
||||
|
||||
def __init__(self, val):
|
||||
"""Create a variable_set_list pretty-printer."""
|
||||
self.val = val
|
||||
|
||||
def to_string(self):
|
||||
"""Convert a variable_set_list to string."""
|
||||
return str(self.val.address)
|
||||
|
||||
def children(self):
|
||||
"""Iterate through variables and values."""
|
||||
if VariableSetListPrinter.GLOBALSET is None:
|
||||
block = gdb.lookup_global_symbol('init_hash_global_variable_set').symtab.static_block()
|
||||
VariableSetListPrinter.GLOBALSET = gdb.lookup_symbol('global_variable_set', block)[0].value().address
|
||||
VariableSetListPrinter.GLOBALSET = gdb.lookup_symbol(
|
||||
'global_variable_set', block)[0].value().address
|
||||
ptr = self.val.address
|
||||
i = 0
|
||||
while long(ptr) != 0:
|
||||
while not isNullptr(ptr):
|
||||
nm = '[%d] ' % (i)
|
||||
yield (nm, ptr['set'])
|
||||
if long(ptr['set']) == long(VariableSetListPrinter.GLOBALSET):
|
||||
if int(ptr['set']) == int(VariableSetListPrinter.GLOBALSET):
|
||||
yield (nm, "global_variable_set")
|
||||
else:
|
||||
yield (nm, str(ptr['set'].dereference()))
|
||||
|
|
@ -159,17 +260,22 @@ class VariableSetListPrinter(object):
|
|||
ptr = ptr['next']
|
||||
|
||||
def display_hint(self):
|
||||
"""Show the display hint for the pretty-printer."""
|
||||
return 'map'
|
||||
|
||||
|
||||
def build_pretty_printer():
|
||||
"""Install all the pretty-printers."""
|
||||
pp = gdb.printing.RegexpCollectionPrettyPrinter("gnumake")
|
||||
pp.add_printer('floc', r'^floc$', FileLocation)
|
||||
pp.add_printer('stringlist', r'^stringlist$', StringListPrinter)
|
||||
pp.add_printer('variable', r'^variable$', VariablePrinter)
|
||||
pp.add_printer('hashtable', r'^hash_table$', HashTablePrinter)
|
||||
pp.add_printer('variableset', r'^variable_set$', VariableSetPrinter)
|
||||
pp.add_printer('variablesetlist', r'^variable_set_list$', VariableSetListPrinter)
|
||||
return pp
|
||||
|
||||
|
||||
# Use replace=True so we can re-source this file
|
||||
gdb.printing.register_pretty_printer(gdb.current_objfile(),
|
||||
build_pretty_printer(), replace=True)
|
||||
|
|
|
|||
Loading…
Reference in a new issue