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Getting started

Editor configuration

• Emacs
• Vim and Neovim: https://github.com/autozimu/LanguageClient-neovim/wiki/cquery
• Visual Studio Code
• Nuclide: add cquery to your PATH and enable the cquery check in the Nuclide/Atom settings.

Diagnostics

Dump JSON requests and responses:

sudo sysdig -As999 --unbuffered -p '%evt.type %evt.buffer' "proc.pid=$(pgrep -fn build/app) and fd.type=pipe" | egrep -v '^Content|^$'

Passing the option --log-stdin-stdout-to-stderr.

Insert volatile static int z=0;while(!z); for a poor man's breakpoint and run gdb -p $(pgrep -fn cquery) to attach to the cquery process. p z=1 for continuing.

Some issues introduce diagnostic methods:

• https://github.com/jacobdufault/cquery/issues/192 clang_toggleCrashRecovery(0) before clang_indexTranslationUnit to disable crash recovery and get the stack trace from a debugger.

On Linux, if --log-file reports indexer.cc:1892 WARN| Indexing /tmp/json/test/src/unit-iterators2.cpp failed with errno=1\nlibclang: crash detected during indexing TU, consider patching your libclang.so.5.0 or libclang.so.4.0 with the following commands:

% printf '\x4d' | dd of=build/release/lib/clang+llvm-5.0.1-x86_64-linux-gnu-ubuntu-14.04/lib/libclang.so.5.0 obs=1 seek=$[0x47aece] conv=notrunc
% printf '\x4d' | dd of=build/release/lib/clang+llvm-4.0.0-x86_64-linux-gnu-ubuntu-14.04/lib/libclang.so.4.0 obs=1 seek=$[0x4172b5] conv=notrunc