1#!/bin/bash -u 2# 3# Copyright 2016 Google Inc. All Rights Reserved. 4# 5# This script is intended to be used by binary_search_state.py, as 6# part of the binary search triage on Android NDK apps. This script simply 7# deletes all given objects, signaling gradle to execute a recompilation of said 8# object files. 9# 10 11# Input is a file, with newline seperated list of files we will be switching 12OBJ_LIST_FILE=$1 13 14# Check that number of arguments == 1 15if [ $# -ne 1 ] ; then 16 echo "ERROR:" 17 echo "Got multiple inputs to switch script!" 18 echo "Run binary_search_state.py with --file_args" 19 exit 1 20fi 21 22# Remove any file that's being switched. This is because Gradle only recompiles 23# if: 24# 1. The resultant object file doesn't exist 25# 2. The hash of the source file has changed 26# 27# Because we have no reliable way to edit the source file, we instead remove the 28# object file and have the compiler wrapper insert the file from the appropriate 29# cache (good or bad). 30# 31# Not entirely relevant to the Teapot example, but something to consider: 32# This removing strategy has the side effect that all switched items cause the 33# invocation of the compiler wrapper, which can add up and slow the build 34# process. With Android's source tree, Make checks the timestamp of the object 35# file. So we symlink in the appropriate file and touch it to tell Make it needs 36# to be relinked. This avoids having to call the compiler wrapper in the 37# majority of cases. 38# 39# However, a similar construct doesn't seem to exist in Gradle. It may be better 40# to add a build target to Gradle that will always relink all given object 41# files. This way we can avoid calling the compiler wrapper while Triaging and 42# save some time. Not really necessary 43 44cat $OBJ_LIST_FILE | xargs rm 45exit 0 46 47