| # This is gdbinit for source level debugging with -fdebug-compilation-dir |
| # compile option or when building with libc++. |
| |
| python |
| |
| import os |
| import subprocess |
| import sys |
| |
| def get_current_debug_file_directories(): |
| dir = gdb.execute("show debug-file-directory", to_string=True) |
| dir = dir[len('The directory where separate debug symbols are searched for is "'):-len('".')-1] |
| return set(dir.split(":")) |
| |
| |
| def add_debug_file_directory(dir): |
| # gdb has no function to add debug-file-directory, simulates that by using |
| # `show debug-file-directory` and `set debug-file-directory <directories>`. |
| current_dirs = get_current_debug_file_directories() |
| current_dirs.add(dir) |
| gdb.execute("set debug-file-directory %s" % ":".join(current_dirs), |
| to_string=True) |
| |
| |
| libcxx_pretty_printers_loaded = False |
| def load_libcxx_pretty_printers(compile_dir): |
| global libcxx_pretty_printers_loaded |
| if libcxx_pretty_printers_loaded: |
| return |
| git = subprocess.Popen( |
| ['git', '-C', compile_dir, 'rev-parse', '--show-toplevel'], |
| stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE) |
| src_dir, _ = git.communicate() |
| if git.returncode: |
| return |
| libcxx_pretty_printers = os.path.join(str(src_dir).rstrip(), 'third_party', |
| 'libcxx-pretty-printers', 'src') |
| if not os.path.isdir(libcxx_pretty_printers): |
| return |
| sys.path.insert(1, libcxx_pretty_printers) |
| from libcxx.v1.printers import register_libcxx_printers |
| register_libcxx_printers(None) |
| libcxx_pretty_printers_loaded = True |
| |
| |
| def newobj_handler(event): |
| compile_dir = os.path.dirname(event.new_objfile.filename) |
| if not compile_dir: |
| return |
| |
| # Add source path |
| gdb.execute("dir %s" % compile_dir) |
| |
| # Need to tell the location of .dwo files. |
| # https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html |
| # https://crbug.com/603286#c35 |
| add_debug_file_directory(compile_dir) |
| |
| load_libcxx_pretty_printers(compile_dir) |
| |
| |
| # Event hook for newly loaded objfiles. |
| # https://sourceware.org/gdb/onlinedocs/gdb/Events-In-Python.html |
| gdb.events.new_objfile.connect(newobj_handler) |
| |
| end |