def trace (self):
self.type = 'list'
self.curr = None
self.main = gdb.eval('rb_main_thread')
self.unwind = gdb.parameter('unwindonsignal')
gdb.execute('set unwindonsignal on')
gdb.execute('watch rb_curr_thread')
gdb.breakpoints()[-1].silent = True
num = gdb.breakpoints()[-1].number
try:
prev = None
while True:
gdb.execute('continue')
curr = gdb.eval('rb_curr_thread')
if curr == prev: break
self.print_thread(curr)
prev = curr
except KeyboardInterrupt:
None
gdb.execute('delete %d' % num)
gdb.execute('set unwindonsignal %s' % (self.unwind and 'on' or 'off'))
def invoke (self, arg, from_tty):
self.dont_repeat()
num = arg and int(arg) or 100
self.setup()
try:
while num > 0:
num -= 1
gdb.execute('continue')
frame = gdb.selected_frame()
if frame.pc() != self.func:
raise KeyboardInterrupt
node = gdb.eval('(NODE*) $rsi')
file = node['nd_file'].string()
line = gdb.eval('nd_line(%s)' % node)
method = gdb.eval('rb_id2name($rcx)')
method = method > 0 and method.string() or '(unknown)'
print "%s in %s:%d" % (method,file,line)
self.teardown()
except KeyboardInterrupt:
self.teardown()
except RuntimeError, text:
self.teardown()
if not re.search('signaled while in a function called from GDB', text):
raise
def print_stack (self, th, frame, node):
while True:
stk_pos = th['stk_pos']
stk_ptr = th['stk_ptr']
stk_len = th['stk_len']
addr = gdb.eval('(VALUE*)%s' % frame)
if not self.is_heap_stack and th != self.curr and stk_pos < addr and addr < (stk_pos+stk_len):
frame = (addr-stk_pos) + stk_ptr
frame = gdb.eval('(struct FRAME *)%s' % frame)
node = frame['node']
file = node['nd_file'].string()
line = gdb.eval('nd_line(%s)' % node)
type = gdb.eval('(enum node_type) nd_type(%s)' % node)
if frame['last_func']:
try:
method = gdb.eval('rb_id2name(%s)' % frame['last_func']).string()
except:
method = '(unknown)'
else:
method = '(unknown)'
print " ",
print str(type).lower().center(18), "%s in %s:%d" % (method, file, line)
if frame['prev'] == 0 or frame['last_func'] == 0: break
frame = frame['prev']
node = frame['node']
if node == 0: break
def all_objects (self):
self.heaps_used = gdb.eval('heaps_used')
for i in xrange(self.heaps_used):
p = gdb.eval("(RVALUE*) heaps[%i].slot" % i)
pend = p + gdb.eval("heaps[%i].limit" % i)
while p < pend:
yield p, p['as']['basic']['flags']
p += 1
def invoke (self, arg, from_tty):
self.dont_repeat()
cache = gdb.eval('cache')
size = 0x800
empty = 0
for i in xrange(size):
entry = cache[i]
if entry['mid'] != 0:
klass = gdb.eval('rb_class2name(%d)' % entry['klass'])
method = gdb.eval('rb_id2name(%d)' % entry['mid'])
print " %s#%s" % (klass and klass.string() or '(unknown)', method and method.string() or '(unknown)')
else:
empty += 1
print
print "%d empty slots (%.2f%%)" % (empty, empty*100.0/size)
print
def print_nodes (self):
nodes = ZeroDict()
for (obj, type) in self.live_objects():
if type == 0x3f:
nodes[ (int(obj['as']['node']['flags']) >> 12) & 0xff ] += 1
for (node, num) in sorted(nodes.items(), key=lambda(k,v):(v,k)):
print "% 8d %s" % (num, gdb.eval('(enum node_type) (%d)' % node))
def print_classes (self):
classes = ZeroDict()
for (obj, type) in self.live_objects():
if type == 0x2:
classes[ int(obj['as']['basic']['klass']) ] += 1
for (klass, num) in sorted(classes.items(), key=lambda(k,v):(v,k)):
print "% 8d %s" % (num, gdb.eval('rb_class2name(%d)' % klass).string())
def print_thread (self, th):
if self.type != 'list': print
print th,
print th == self.main and 'main' or ' ',
print th == self.curr and 'curr' or ' ',
print "thread", " %s" % str(th['status']).ljust(16), "%s" % self.wait_state(th), " ",
if th != self.curr:
print "% 8d bytes" % th['stk_len']
else:
print
if self.type == 'list': return
if th == self.curr:
frame = gdb.eval('ruby_frame')
node = gdb.eval('ruby_current_node')
else:
frame = th['frame']
node = frame['node']
self.print_stack(th, frame, node)
def invoke (self, arg, from_tty):
self.dont_repeat()
type = int(gdb.eval("((struct RBasic *)(%d))->flags & 0x3f" % int(arg,0)))
rtype = RubyObjects.TYPES.get(type, 'unknown')
if rtype == 'array':
print rtype
elif rtype == 'hash':
print rtype
else:
print 'unknown'
def show (self):
self.main = gdb.eval('rb_main_thread')
self.curr = gdb.eval('rb_curr_thread')
self.now = time.time()
try:
gdb.eval('rb_thread_start_2')
except RuntimeError:
self.is_heap_stack = False
else:
self.is_heap_stack = True
if self.main == 0:
print "Ruby VM is not running!"
else:
th = self.main
while True:
self.print_thread(th)
th = th['next']
if th == self.main: break
print
def setup (self):
commands = """
set $func = malloc(1)
p ((char*)$func)[0] = '\xc3'
p mprotect(($func&0xfffffffffffff000), 1, 0x7)
p rb_add_event_hook($func, RUBY_EVENT_C_CALL|RUBY_EVENT_CALL)
b *$func
""".split("\n")
for c in commands:
gdb.execute(c)
gdb.breakpoints()[-1].silent = True
self.func = gdb.eval('$func')
self.unwind = gdb.parameter('unwindonsignal')
gdb.execute('set unwindonsignal on')
def print_classes (self):
classes = ZeroDict()
for (obj, type) in self.live_objects():
if type == 0x0:
pass # none
elif type == 0x3b:
pass # blktag
elif type == 0x3c:
pass # undef
elif type == 0x3d:
pass # varmap
elif type == 0x3e:
pass # scope
elif type == 0x3f:
pass # node
else:
klass = obj['as']['basic']['klass']
if klass:
classes[ int(klass) ] += 1
for (klass, num) in sorted(classes.items(), key=lambda(k,v):(v,k)):
print "% 8d %s" % (num, gdb.eval('rb_class2name(%d)' % klass).string())
def invoke (self, arg, from_tty):
self.dont_repeat()
arg = arg.replace('\\', '\\\\').replace('"', '\\\"')
print gdb.eval("((struct RString*)rb_eval_string_protect(\"begin; (%s).inspect; rescue Exception => e; e.inspect; end\", 0))->ptr" % arg).string()