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android-review.linaro.org / kernel / tools / interceptor / f298da8c0defb1761d47d0417dda89b1171ef1a2
commitf298da8c0defb1761d47d0417dda89b1171ef1a2[log] [tgz]
authorYifan Hong <elsk@google.com>Mon Dec 13 17:06:33 2021 -0800
committerYifan Hong <elsk@google.com>Tue Dec 14 21:08:49 2021 +0000
treee67d91811c377ab11beae9ff6afcc24c8d838497
parent65cc9ba16295f4f2c7f59015c1e7433c586d35f6 [diff]
add readme.md

Change-Id: Ie82d4e210ba8595412c05689e9fb34df88f7a5ac
1 file changed
tree: e67d91811c377ab11beae9ff6afcc24c8d838497
  1. .clang-format ⇨ ../../build/soong/scripts/system-clang-format-2
  2. NOTICE ⇨ LICENSE
  3. analysis.cc
  4. Android.bp
  5. CMakeLists.txt
  6. interceptor.cc
  7. interceptor.h
  8. interceptor_utils.cc
  9. interceptor_utils.h
  10. LICENSE
  11. log.proto
  12. main.cc
  13. METADATA
  14. MODULE_LICENSE_APACHE2
  15. OWNERS
  16. README.md
README.md

Interceptor

WARNING: The interceptor is still a work in progress. Contents of this section are subject to change.

The interceptor is a tool to intercept all execve and other system calls during the build (specifically, make) in order to construct the dependency tree and understand a list of commands executed by the build system. With the interceptor, the Bazel build system may first "dry-run", analyze all inputs and outputs of each command, generate BUILD.bazel files for each command, then execute on these generated build files.

This allows us to enable the following:

  • Trim the dependency tree for each command.
    • Reduce the possibility of invalidating an output when an unrelated input file is touched
    • More parallelism within Bazel, not make
    • Even faster incremental builds
  • Generate compile_commands.json, which can then be plugged into IDEs and code search tools (e.g. https://cs.android.com/android/kernel/superproject)
  • More cache hits for Remote Build Execution (RBE)
  • Give a more trimmed and precise list of resources for DDK
  • etc.