1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
#!/usr/bin/env python3
"""
A gdb-compatible frontend for lldb that implements just enough
commands to run the tests in the debuginfo-tests repository with lldb.
"""
# ----------------------------------------------------------------------
# Auto-detect lldb python module.
import subprocess, platform, os, sys
try:
# Just try for LLDB in case PYTHONPATH is already correctly setup.
import lldb
except ImportError:
# Ask the command line driver for the path to the lldb module. Copy over
# the environment so that SDKROOT is propagated to xcrun.
command = ['xcrun', 'lldb', '-P'] if platform.system() == 'Darwin' else ['lldb', '-P']
# Extend the PYTHONPATH if the path exists and isn't already there.
lldb_python_path = subprocess.check_output(command).decode("utf-8").strip()
if os.path.exists(lldb_python_path) and not sys.path.__contains__(lldb_python_path):
sys.path.append(lldb_python_path)
# Try importing LLDB again.
try:
import lldb
print('imported lldb from: "%s"'%lldb_python_path)
except ImportError:
print("error: couldn't locate the 'lldb' module, please set PYTHONPATH correctly")
sys.exit(1)
# ----------------------------------------------------------------------
# Command line option handling.
import argparse
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('--quiet', '-q', action="store_true", help='ignored')
parser.add_argument('-batch', action="store_true",
help='exit after processing comand line')
parser.add_argument('-n', action="store_true", help='ignore .lldb file')
parser.add_argument('-x', dest='script', type=argparse.FileType('r'),
help='execute commands from file')
parser.add_argument("target", help="the program to debug")
args = parser.parse_args()
# Create a new debugger instance.
debugger = lldb.SBDebugger.Create()
debugger.SkipLLDBInitFiles(args.n)
# Make sure to clean up the debugger on exit.
import atexit
def on_exit():
debugger.Terminate()
atexit.register(on_exit)
# Don't return from lldb function calls until the process stops.
debugger.SetAsync(False)
# Create a target from a file and arch.
arch = os.popen("file "+args.target).read().split()[-1]
target = debugger.CreateTargetWithFileAndArch(args.target, arch)
if not target:
print("Could not create target %s"% args.target)
sys.exit(1)
if not args.script:
print("Interactive mode is not implemented.")
sys.exit(1)
import re
for command in args.script:
# Strip newline and whitespaces and split into words.
cmd = command[:-1].strip().split()
if not cmd:
continue
print('> %s'% command[:-1])
try:
if re.match('^r|(run)$', cmd[0]):
error = lldb.SBError()
launchinfo = lldb.SBLaunchInfo([])
launchinfo.SetWorkingDirectory(os.getcwd())
process = target.Launch(launchinfo, error)
print(error)
if not process or error.fail:
state = process.GetState()
print("State = %d" % state)
print("""
ERROR: Could not launch process.
NOTE: There are several reasons why this may happen:
* Root needs to run "DevToolsSecurity --enable".
* Older versions of lldb cannot launch more than one process simultaneously.
""")
sys.exit(1)
elif re.match('^b|(break)$', cmd[0]) and len(cmd) == 2:
if re.match('[0-9]+', cmd[1]):
# b line
mainfile = target.FindFunctions('main')[0].compile_unit.file
print(target.BreakpointCreateByLocation(mainfile, int(cmd[1])))
else:
# b file:line
file, line = cmd[1].split(':')
print(target.BreakpointCreateByLocation(file, int(line)))
elif re.match('^ptype$', cmd[0]) and len(cmd) == 2:
# GDB's ptype has multiple incarnations depending on its
# argument (global variable, function, type). The definition
# here is for looking up the signature of a function and only
# if that fails it looks for a type with that name.
# Type lookup in LLDB would be "image lookup --type".
for elem in target.FindFunctions(cmd[1]):
print(elem.function.type)
continue
print(target.FindFirstType(cmd[1]))
elif re.match('^po$', cmd[0]) and len(cmd) > 1:
try:
opts = lldb.SBExpressionOptions()
opts.SetFetchDynamicValue(True)
opts.SetCoerceResultToId(True)
print(target.EvaluateExpression(' '.join(cmd[1:]), opts))
except:
# FIXME: This is a fallback path for the lab.llvm.org
# buildbot running OS X 10.7; it should be removed.
thread = process.GetThreadAtIndex(0)
frame = thread.GetFrameAtIndex(0)
print(frame.EvaluateExpression(' '.join(cmd[1:])))
elif re.match('^p|(print)$', cmd[0]) and len(cmd) > 1:
thread = process.GetThreadAtIndex(0)
frame = thread.GetFrameAtIndex(0)
print(frame.EvaluateExpression(' '.join(cmd[1:])))
elif re.match('^n|(next)$', cmd[0]):
thread = process.GetThreadAtIndex(0)
thread.StepOver()
elif re.match('^q|(quit)$', cmd[0]):
sys.exit(0)
else:
print(debugger.HandleCommand(' '.join(cmd)))
except SystemExit:
raise
except:
print('Could not handle the command "%s"' % ' '.join(cmd))
|
