| #!/usr/bin/env python |
| # |
| # Copyright (C) 2015 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| import adb |
| import argparse |
| import json |
| import logging |
| import os |
| import posixpath |
| import re |
| import shutil |
| import subprocess |
| import sys |
| import tempfile |
| import textwrap |
| |
| # Shared functions across gdbclient.py and ndk-gdb.py. |
| import gdbrunner |
| |
| g_temp_dirs = [] |
| |
| |
| def read_toolchain_config(root): |
| """Finds out current toolchain path and version.""" |
| def get_value(str): |
| return str[str.index('"') + 1:str.rindex('"')] |
| |
| config_path = os.path.join(root, 'build', 'soong', 'cc', 'config', |
| 'global.go') |
| with open(config_path) as f: |
| contents = f.readlines() |
| clang_base = "" |
| clang_version = "" |
| for line in contents: |
| line = line.strip() |
| if line.startswith('ClangDefaultBase'): |
| clang_base = get_value(line) |
| elif line.startswith('ClangDefaultVersion'): |
| clang_version = get_value(line) |
| return (clang_base, clang_version) |
| |
| |
| def get_gdbserver_path(root, arch): |
| path = "{}/prebuilts/misc/gdbserver/android-{}/gdbserver{}" |
| if arch.endswith("64"): |
| return path.format(root, arch, "64") |
| else: |
| return path.format(root, arch, "") |
| |
| |
| def get_lldb_server_path(root, clang_base, clang_version, arch): |
| arch = { |
| 'arm': 'arm', |
| 'arm64': 'aarch64', |
| 'x86': 'i386', |
| 'x86_64': 'x86_64', |
| }[arch] |
| return os.path.join(root, clang_base, "linux-x86", |
| clang_version, "runtimes_ndk_cxx", arch, "lldb-server") |
| |
| |
| def get_tracer_pid(device, pid): |
| if pid is None: |
| return 0 |
| |
| line, _ = device.shell(["grep", "-e", "^TracerPid:", "/proc/{}/status".format(pid)]) |
| tracer_pid = re.sub('TracerPid:\t(.*)\n', r'\1', line) |
| return int(tracer_pid) |
| |
| |
| def parse_args(): |
| parser = gdbrunner.ArgumentParser() |
| |
| group = parser.add_argument_group(title="attach target") |
| group = group.add_mutually_exclusive_group(required=True) |
| group.add_argument( |
| "-p", dest="target_pid", metavar="PID", type=int, |
| help="attach to a process with specified PID") |
| group.add_argument( |
| "-n", dest="target_name", metavar="NAME", |
| help="attach to a process with specified name") |
| group.add_argument( |
| "-r", dest="run_cmd", metavar="CMD", nargs=argparse.REMAINDER, |
| help="run a binary on the device, with args") |
| |
| parser.add_argument( |
| "--port", nargs="?", default="5039", |
| help="override the port used on the host [default: 5039]") |
| parser.add_argument( |
| "--user", nargs="?", default="root", |
| help="user to run commands as on the device [default: root]") |
| parser.add_argument( |
| "--setup-forwarding", default=None, choices=["gdb", "vscode"], |
| help=("Setup the gdbserver and port forwarding. Prints commands or " + |
| ".vscode/launch.json configuration needed to connect the debugging " + |
| "client to the server.")) |
| |
| lldb_group = parser.add_mutually_exclusive_group() |
| lldb_group.add_argument("--lldb", action="store_true", help="Use lldb.") |
| lldb_group.add_argument("--no-lldb", action="store_true", help="Do not use lldb.") |
| |
| parser.add_argument( |
| "--env", nargs=1, action="append", metavar="VAR=VALUE", |
| help="set environment variable when running a binary") |
| |
| return parser.parse_args() |
| |
| |
| def verify_device(root, device): |
| name = device.get_prop("ro.product.name") |
| target_device = os.environ["TARGET_PRODUCT"] |
| if target_device != name: |
| msg = "TARGET_PRODUCT ({}) does not match attached device ({})" |
| sys.exit(msg.format(target_device, name)) |
| |
| |
| def get_remote_pid(device, process_name): |
| processes = gdbrunner.get_processes(device) |
| if process_name not in processes: |
| msg = "failed to find running process {}".format(process_name) |
| sys.exit(msg) |
| pids = processes[process_name] |
| if len(pids) > 1: |
| msg = "multiple processes match '{}': {}".format(process_name, pids) |
| sys.exit(msg) |
| |
| # Fetch the binary using the PID later. |
| return pids[0] |
| |
| |
| def make_temp_dir(prefix): |
| global g_temp_dirs |
| result = tempfile.mkdtemp(prefix='gdbclient-linker-') |
| g_temp_dirs.append(result) |
| return result |
| |
| |
| def ensure_linker(device, sysroot, interp): |
| """Ensure that the device's linker exists on the host. |
| |
| PT_INTERP is usually /system/bin/linker[64], but on the device, that file is |
| a symlink to /apex/com.android.runtime/bin/linker[64]. The symbolized linker |
| binary on the host is located in ${sysroot}/apex, not in ${sysroot}/system, |
| so add the ${sysroot}/apex path to the solib search path. |
| |
| PT_INTERP will be /system/bin/bootstrap/linker[64] for executables using the |
| non-APEX/bootstrap linker. No search path modification is needed. |
| |
| For a tapas build, only an unbundled app is built, and there is no linker in |
| ${sysroot} at all, so copy the linker from the device. |
| |
| Returns: |
| A directory to add to the soinfo search path or None if no directory |
| needs to be added. |
| """ |
| |
| # Static executables have no interpreter. |
| if interp is None: |
| return None |
| |
| # gdb will search for the linker using the PT_INTERP path. First try to find |
| # it in the sysroot. |
| local_path = os.path.join(sysroot, interp.lstrip("/")) |
| if os.path.exists(local_path): |
| return None |
| |
| # If the linker on the device is a symlink, search for the symlink's target |
| # in the sysroot directory. |
| interp_real, _ = device.shell(["realpath", interp]) |
| interp_real = interp_real.strip() |
| local_path = os.path.join(sysroot, interp_real.lstrip("/")) |
| if os.path.exists(local_path): |
| if posixpath.basename(interp) == posixpath.basename(interp_real): |
| # Add the interpreter's directory to the search path. |
| return os.path.dirname(local_path) |
| else: |
| # If PT_INTERP is linker_asan[64], but the sysroot file is |
| # linker[64], then copy the local file to the name gdb expects. |
| result = make_temp_dir('gdbclient-linker-') |
| shutil.copy(local_path, os.path.join(result, posixpath.basename(interp))) |
| return result |
| |
| # Pull the system linker. |
| result = make_temp_dir('gdbclient-linker-') |
| device.pull(interp, os.path.join(result, posixpath.basename(interp))) |
| return result |
| |
| |
| def handle_switches(args, sysroot): |
| """Fetch the targeted binary and determine how to attach gdb. |
| |
| Args: |
| args: Parsed arguments. |
| sysroot: Local sysroot path. |
| |
| Returns: |
| (binary_file, attach_pid, run_cmd). |
| Precisely one of attach_pid or run_cmd will be None. |
| """ |
| |
| device = args.device |
| binary_file = None |
| pid = None |
| run_cmd = None |
| |
| args.su_cmd = ["su", args.user] if args.user else [] |
| |
| if args.target_pid: |
| # Fetch the binary using the PID later. |
| pid = args.target_pid |
| elif args.target_name: |
| # Fetch the binary using the PID later. |
| pid = get_remote_pid(device, args.target_name) |
| elif args.run_cmd: |
| if not args.run_cmd[0]: |
| sys.exit("empty command passed to -r") |
| run_cmd = args.run_cmd |
| if not run_cmd[0].startswith("/"): |
| try: |
| run_cmd[0] = gdbrunner.find_executable_path(device, args.run_cmd[0], |
| run_as_cmd=args.su_cmd) |
| except RuntimeError: |
| sys.exit("Could not find executable '{}' passed to -r, " |
| "please provide an absolute path.".format(args.run_cmd[0])) |
| |
| binary_file, local = gdbrunner.find_file(device, run_cmd[0], sysroot, |
| run_as_cmd=args.su_cmd) |
| if binary_file is None: |
| assert pid is not None |
| try: |
| binary_file, local = gdbrunner.find_binary(device, pid, sysroot, |
| run_as_cmd=args.su_cmd) |
| except adb.ShellError: |
| sys.exit("failed to pull binary for PID {}".format(pid)) |
| |
| if not local: |
| logging.warning("Couldn't find local unstripped executable in {}," |
| " symbols may not be available.".format(sysroot)) |
| |
| return (binary_file, pid, run_cmd) |
| |
| def generate_vscode_script(gdbpath, root, sysroot, binary_name, port, dalvik_gdb_script, solib_search_path): |
| # TODO It would be nice if we didn't need to copy this or run the |
| # gdbclient.py program manually. Doing this would probably require |
| # writing a vscode extension or modifying an existing one. |
| res = { |
| "name": "(gdbclient.py) Attach {} (port: {})".format(binary_name.split("/")[-1], port), |
| "type": "cppdbg", |
| "request": "launch", # Needed for gdbserver. |
| "cwd": root, |
| "program": binary_name, |
| "MIMode": "gdb", |
| "miDebuggerServerAddress": "localhost:{}".format(port), |
| "miDebuggerPath": gdbpath, |
| "setupCommands": [ |
| { |
| # Required for vscode. |
| "description": "Enable pretty-printing for gdb", |
| "text": "-enable-pretty-printing", |
| "ignoreFailures": True, |
| }, |
| { |
| "description": "gdb command: dir", |
| "text": "-environment-directory {}".format(root), |
| "ignoreFailures": False |
| }, |
| { |
| "description": "gdb command: set solib-search-path", |
| "text": "-gdb-set solib-search-path {}".format(":".join(solib_search_path)), |
| "ignoreFailures": False |
| }, |
| { |
| "description": "gdb command: set solib-absolute-prefix", |
| "text": "-gdb-set solib-absolute-prefix {}".format(sysroot), |
| "ignoreFailures": False |
| }, |
| ] |
| } |
| if dalvik_gdb_script: |
| res["setupCommands"].append({ |
| "description": "gdb command: source art commands", |
| "text": "-interpreter-exec console \"source {}\"".format(dalvik_gdb_script), |
| "ignoreFailures": False, |
| }) |
| return json.dumps(res, indent=4) |
| |
| def generate_gdb_script(root, sysroot, binary_name, port, dalvik_gdb_script, solib_search_path, connect_timeout): |
| solib_search_path = ":".join(solib_search_path) |
| |
| gdb_commands = "" |
| gdb_commands += "file '{}'\n".format(binary_name) |
| gdb_commands += "directory '{}'\n".format(root) |
| gdb_commands += "set solib-absolute-prefix {}\n".format(sysroot) |
| gdb_commands += "set solib-search-path {}\n".format(solib_search_path) |
| if dalvik_gdb_script: |
| gdb_commands += "source {}\n".format(dalvik_gdb_script) |
| |
| # Try to connect for a few seconds, sometimes the device gdbserver takes |
| # a little bit to come up, especially on emulators. |
| gdb_commands += """ |
| python |
| |
| def target_remote_with_retry(target, timeout_seconds): |
| import time |
| end_time = time.time() + timeout_seconds |
| while True: |
| try: |
| gdb.execute("target extended-remote " + target) |
| return True |
| except gdb.error as e: |
| time_left = end_time - time.time() |
| if time_left < 0 or time_left > timeout_seconds: |
| print("Error: unable to connect to device.") |
| print(e) |
| return False |
| time.sleep(min(0.25, time_left)) |
| |
| target_remote_with_retry(':{}', {}) |
| |
| end |
| """.format(port, connect_timeout) |
| |
| return gdb_commands |
| |
| |
| def generate_lldb_script(sysroot, binary_name, port, solib_search_path): |
| commands = [] |
| commands.append( |
| 'settings append target.exec-search-paths {}'.format(' '.join(solib_search_path))) |
| |
| commands.append('target create {}'.format(binary_name)) |
| commands.append('target modules search-paths add / {}/'.format(sysroot)) |
| commands.append('gdb-remote {}'.format(port)) |
| return '\n'.join(commands) |
| |
| |
| def generate_setup_script(debugger_path, sysroot, linker_search_dir, binary_file, is64bit, port, debugger, connect_timeout=5): |
| # Generate a setup script. |
| # TODO: Detect the zygote and run 'art-on' automatically. |
| root = os.environ["ANDROID_BUILD_TOP"] |
| symbols_dir = os.path.join(sysroot, "system", "lib64" if is64bit else "lib") |
| vendor_dir = os.path.join(sysroot, "vendor", "lib64" if is64bit else "lib") |
| |
| solib_search_path = [] |
| symbols_paths = ["", "hw", "ssl/engines", "drm", "egl", "soundfx"] |
| vendor_paths = ["", "hw", "egl"] |
| solib_search_path += [os.path.join(symbols_dir, x) for x in symbols_paths] |
| solib_search_path += [os.path.join(vendor_dir, x) for x in vendor_paths] |
| if linker_search_dir is not None: |
| solib_search_path += [linker_search_dir] |
| |
| dalvik_gdb_script = os.path.join(root, "development", "scripts", "gdb", "dalvik.gdb") |
| if not os.path.exists(dalvik_gdb_script): |
| logging.warning(("couldn't find {} - ART debugging options will not " + |
| "be available").format(dalvik_gdb_script)) |
| dalvik_gdb_script = None |
| |
| if debugger == "vscode": |
| return generate_vscode_script( |
| debugger_path, root, sysroot, binary_file.name, port, dalvik_gdb_script, solib_search_path) |
| elif debugger == "gdb": |
| return generate_gdb_script(root, sysroot, binary_file.name, port, dalvik_gdb_script, solib_search_path, connect_timeout) |
| elif debugger == 'lldb': |
| return generate_lldb_script( |
| sysroot, binary_file.name, port, solib_search_path) |
| else: |
| raise Exception("Unknown debugger type " + debugger) |
| |
| |
| def do_main(): |
| required_env = ["ANDROID_BUILD_TOP", |
| "ANDROID_PRODUCT_OUT", "TARGET_PRODUCT"] |
| for env in required_env: |
| if env not in os.environ: |
| sys.exit( |
| "Environment variable '{}' not defined, have you run lunch?".format(env)) |
| |
| args = parse_args() |
| device = args.device |
| |
| if device is None: |
| sys.exit("ERROR: Failed to find device.") |
| |
| root = os.environ["ANDROID_BUILD_TOP"] |
| sysroot = os.path.join(os.environ["ANDROID_PRODUCT_OUT"], "symbols") |
| |
| # Make sure the environment matches the attached device. |
| verify_device(root, device) |
| |
| debug_socket = "/data/local/tmp/debug_socket" |
| pid = None |
| run_cmd = None |
| |
| # Fetch binary for -p, -n. |
| binary_file, pid, run_cmd = handle_switches(args, sysroot) |
| |
| with binary_file: |
| if sys.platform.startswith("linux"): |
| platform_name = "linux-x86" |
| elif sys.platform.startswith("darwin"): |
| platform_name = "darwin-x86" |
| else: |
| sys.exit("Unknown platform: {}".format(sys.platform)) |
| |
| arch = gdbrunner.get_binary_arch(binary_file) |
| is64bit = arch.endswith("64") |
| |
| # Make sure we have the linker |
| clang_base, clang_version = read_toolchain_config(root) |
| toolchain_path = os.path.join(root, clang_base, platform_name, |
| clang_version) |
| llvm_readobj_path = os.path.join(toolchain_path, "bin", "llvm-readobj") |
| interp = gdbrunner.get_binary_interp(binary_file.name, llvm_readobj_path) |
| linker_search_dir = ensure_linker(device, sysroot, interp) |
| |
| tracer_pid = get_tracer_pid(device, pid) |
| use_lldb = args.lldb |
| if tracer_pid == 0: |
| cmd_prefix = args.su_cmd |
| if args.env: |
| cmd_prefix += ['env'] + [v[0] for v in args.env] |
| |
| # Start gdbserver. |
| if use_lldb: |
| server_local_path = get_lldb_server_path( |
| root, clang_base, clang_version, arch) |
| server_remote_path = "/data/local/tmp/{}-lldb-server".format( |
| arch) |
| else: |
| server_local_path = get_gdbserver_path(root, arch) |
| server_remote_path = "/data/local/tmp/{}-gdbserver".format( |
| arch) |
| gdbrunner.start_gdbserver( |
| device, server_local_path, server_remote_path, |
| target_pid=pid, run_cmd=run_cmd, debug_socket=debug_socket, |
| port=args.port, run_as_cmd=cmd_prefix, lldb=use_lldb) |
| else: |
| print( |
| "Connecting to tracing pid {} using local port {}".format( |
| tracer_pid, args.port)) |
| gdbrunner.forward_gdbserver_port(device, local=args.port, |
| remote="tcp:{}".format(args.port)) |
| |
| if use_lldb: |
| debugger_path = os.path.join(toolchain_path, "bin", "lldb") |
| debugger = 'lldb' |
| else: |
| debugger_path = os.path.join( |
| root, "prebuilts", "gdb", platform_name, "bin", "gdb") |
| debugger = args.setup_forwarding or "gdb" |
| |
| # Generate a gdb script. |
| setup_commands = generate_setup_script(debugger_path=debugger_path, |
| sysroot=sysroot, |
| linker_search_dir=linker_search_dir, |
| binary_file=binary_file, |
| is64bit=is64bit, |
| port=args.port, |
| debugger=debugger) |
| |
| if use_lldb or not args.setup_forwarding: |
| # Print a newline to separate our messages from the GDB session. |
| print("") |
| |
| # Start gdb. |
| gdbrunner.start_gdb(debugger_path, setup_commands, lldb=use_lldb) |
| else: |
| print("") |
| print(setup_commands) |
| print("") |
| if args.setup_forwarding == "vscode": |
| print(textwrap.dedent(""" |
| Paste the above json into .vscode/launch.json and start the debugger as |
| normal. Press enter in this terminal once debugging is finished to shutdown |
| the gdbserver and close all the ports.""")) |
| else: |
| print(textwrap.dedent(""" |
| Paste the above gdb commands into the gdb frontend to setup the gdbserver |
| connection. Press enter in this terminal once debugging is finished to |
| shutdown the gdbserver and close all the ports.""")) |
| print("") |
| raw_input("Press enter to shutdown gdbserver") |
| |
| |
| def main(): |
| try: |
| do_main() |
| finally: |
| global g_temp_dirs |
| for temp_dir in g_temp_dirs: |
| shutil.rmtree(temp_dir) |
| |
| |
| if __name__ == "__main__": |
| main() |
