If is a pointer to a structure, p will usually just print the address. To print values, use the p command, where can be a variable, a variable expression like object->member_->sub_member_.value, or an address.
E.g., these are equivalent: (lldb) help breakpoint set You can also just use enough letters to form a unique prefix of the command hierarchy.
Many commands also have short mnemonics that match the gdb equivalents. Commands can take arguments in a command-line flag style. The commands are organized into a functional hierarchy, and you can explore the subcommands via (lldb) help breakpoint, etc. LLDB has an extensive help system which you can access by typing help at the (lldb) command prompt. out/debug/Chromium.app/Contents/MacOS/Chromium There are two ways to use LLDB: either launching Chromium directly in LLDB, or attaching to an existing process: lldb.
#MAC OS DEBUGGER INTERRUPT CODE INSTALL#
The debugger on macOS is lldb and it is included in both a full Xcode install and the Command Line Tools package. Note that disabling SIP reduces the overall security of the system, so your system administrator may frown upon it. If you will frequently debug official builds, (1) is recommended. Stripping or force-re-codesigning the binary to not use those options: codesign -force -sign - path/to/Google\ Chrome.app.Disable System Integrity Protection, by:.In order to debug production/released Chrome, you need to do one of two things: However, the official Chrome build is codesigned with the restrict and runtime options, which generally prohibit debuggers from attaching. The official Google Chrome build has published dSYMs that can be downloaded with the script at tools/mac/download_symbols.py or by using the LLDB integration at tools/lldb/lldb_chrome_symbols.py. Producing a dSYM is rather slow, so it is uncommon for developers to build with this configuration. The binary itself will be stripped of its symbols, but the debug information will be saved off into a dSYM file. When doing an is_official_build=true build (which is meant for producing builds with full compiler optimization suitable for shipping to users), enable_dsyms and enable_stripping both get set to true.
This is faster to build than a debug build, but it is less useful for debugging. If you set is_debug=false, a release build will be created with no symbol information, which cannot be used for effective debugging.Ī middle-ground is to set symbol_level=1, which will produce a minimal symbol table, capable of creating backtraces, but without frame-level local variables. Debug builds are larger and non-portable because they default to is_component_build=true, but they contain full debug information. Profiling using Instruments Time Profilerĭebug builds are the default configuration for Chromium and can be explicitly specified with is_debug=true in the args.gn file of the out directory.System Permission Prompts Transparency, Consent, and Control (TCC).
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