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用了下面找到的这个办法，不过貌似没有彻底解决我的问题，仍然在某处jack build的时候会出现java GC溢出的问题。根据错误的提示，在android目录下寻找关键字-Xmx3500 (默认，但是会溢出的GC heap大小），找到如下几个文件分别进行修改。
- build/core/config.mk:
- JILL :=java -Xmx3500m -jar $(JILL_JAR)
- APICHECK_COMMAND := $(APICHECK) -JXmx1024m -J"classpath $(APICHECK_CLASSPATH)"
- external/guava/guava-gwt/pom.xml: <extraJvmArgs>-Xms3500m -Xmx3500m -Xss1024k</extraJvmArgs>
从log看，应该是修改第一行JILL这里就好了，不过为了省心，干脆所有Xmx的地方一起改掉成6144m。
================更新线===================
玛德在一台10G内存的机器上无限次碰到jack编译时候GC溢出的问题，搜了一下，找到一个靠谱的解决方案。
转自： http://blog.csdn.net/brightming/article/details/49763515
================转载的分割线=================
参考：
https://www.ibm.com/developerworks/cn/opensource/os-cn-android-build/
1、下载
参考了以下的下载失败重下载脚本：
[zzz@localhost android-src]$ cat myrepo.sh
#!/bin/sh
repo sync
while [ $? -ne 0 ]
do
echo "try repo sync again"
repo sync
done
[zzz@localhost android-src]$
下班前开始跑，第二天就有了。
2、编译第一次直接进入下载的源代码目录，运行make，过了3个多小时后，报错：
[ 31% 9980/31772] host Java: bouncycastle-host (out/host/common/obj/JAVA_LIBRARIES/bouncycastle-host_intermediates/classes)
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
[ 31% 9983/31772] host Java: bouncycastle-bcpkix-host (out/host/common/obj/JAVA_LIBRARIES/bouncycastle-bcpkix-host_intermediates/classes)
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
[ 31% 9987/31772] Build: out/host/linux-x86/obj/EXECUTABLES/jack_intermediates/jack
Writing client settings in /home/gumh/.jack-settings
Installing jack server in "/home/gumh/.jack-server"
Launching Jack server java -Djava.io.tmpdir=/tmp -Dfile.encoding=UTF-8 -XX:+TieredCompilation -cp /home/gumh/.jack-server/launcher.jar com.android.jack.launcher.ServerLauncher
[ 31% 10007/31772] host C++: zipalign <= build/tools/zipalign/ZipEntry.cpp
build/tools/zipalign/ZipEntry.cpp:145:52: warning: unused parameter 'pZipFile' [-Wunused-parameter]
status_t ZipEntry::initFromExternal(const ZipFile* pZipFile,
^
build/tools/zipalign/ZipEntry.cpp:151:12: warning: destination for this 'memcpy' call is a pointer to dynamic class 'CentralDirEntry'; vtable pointer will be overwritten [-Wdynamic-class-memaccess]
memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE));
~~~~~~ ^
build/tools/zipalign/ZipEntry.cpp:151:12: note: explicitly cast the pointer to silence this warning
memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE));
^
(void*)
2 warnings generated.
[ 31% 10012/31772] host C: libzopfli <= external/zopfli/src/zopfli/lz77.c
external/zopfli/src/zopfli/lz77.c:95:60: warning: unused parameter 'datasize' [-Wunused-parameter]
void ZopfliVerifyLenDist(const unsigned char* data, size_t datasize, size_t pos,
^
1 warning generated.
[ 31% 10040/31772] Building with Jack: out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex
FAILED: /bin/bash out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex.rsp
GC overhead limit exceeded
Try increasing heap size with java option '-Xmx<size>'
Warning: This may have produced partial or corrupted output.
ninja: build stopped: subcommand failed.
make: *** [ninja_wrapper] Error 1
[zzz@localhost android-src]$
//---2015-11-13--//
make之前还运行了下面的指令：
#source ./build/envsetup.sh
这个命令选择你的编译环境的硬件体系
#lunch
下面这个命令就开始编译了
#make
通过跟踪顶层makefile，找到有关jack的目录：prebuilts/sdk/tools，其中看到有个jack-admin，正是启动jack所在的shell。里面有个设置：
#
# Settings
#
JACK_HOME="${JACK_HOME:=$HOME/.jack-server}"
CLIENT_SETTING="${CLIENT_SETTING:=$HOME/.jack-settings}"
TMPDIR=${TMPDIR:=/tmp}
JACK_SERVER_VM_ARGUMENTS="${JACK_SERVER_VM_ARGUMENTS:=-Dfile.encoding=UTF-8 -XX:+TieredCompilation}"
修改一下，增加-Xmx2048M:
#
# Settings
#
JACK_SERVER_VM_ARGUMENTS="${JACK_SERVER_VM_ARGUMENTS:=-Dfile.encoding=UTF-8 -XX:+TieredCompilation -Xmx:2048M}"
再次make，好像没起作用：
[ 1% 296/20841] Build: out/host/linux...bj/EXECUTABLES/jack_intermediates/jack
Jack server already installed in "/home/gumh/.jack-server"
Launching Jack server java -Djava.io.tmpdir=/tmp -Dfile.encoding=UTF-8 -XX:+TieredCompilation -cp /home/gumh/.jack-server/launcher.jar com.android.jack.launcher.ServerLauncher
找到jack-admin中的start-server语句，直接在里面增加：
start-server)
isServerRunning
RUNNING=$?
if [ "$RUNNING" = 0 ]; then
echo "Server is already running"
else
echo "before to start-server,JACK_SERVER_VM_ARGUMENTS=" $JACK_SERVER_VM_ARGUMENTS
JACK_SERVER_COMMAND="java -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS-Xmx2048M -cp $LAUNCHER_JAR $LAUNCHER_NAME"
echo "Launching Jack server" $JACK_SERVER_COMMAND
(
再次执行make指令，这次ok了。
这里有一个问题没弄清楚：有时候执行make的时候，会自动启动jackserver，有时候又不会，会报错说server未启动，请用jack-admin start-server来启动的提示。
经过了4个多小时，终于完成了。
external/gtest/include/gtest/gtest_pred_impl.h:77:52: note: expanded from macro 'GTEST_ASSERT_'
if (const ::testing::AssertionResult gtest_ar = (expression)) \
^
1 warning generated.
[100% 20544/20544] host Executable: ne...t_test_osi_intermediates/net_test_osi)
查看一下：
[zzz@localhost android-src]$ ll out/target/product/generic/
total 1594800
-rw-rw-r--. 1 zzz zzz 7 Nov 14 11:27 android-info.txt
-rw-rw-r--. 1 zzz zzz 63 Nov 14 11:25 build_fingerprint.txt
drwxrwxr-x. 2 zzz zzz 4096 Nov 14 14:37 cache
-rw-r--r--. 1 zzz zzz 69206016 Nov 14 14:37 cache.img
-rw-rw-r--. 1 zzz zzz 72964 Nov 10 15:40 clean_steps.mk
drwxrwxr-x. 4 zzz zzz 4096 Nov 14 11:27 data
drwxrwxr-x. 3 zzz zzz 4096 Nov 14 12:02 dex_bootjars
drwxrwxr-x. 5 zzz zzz 4096 Nov 14 13:58 gen
-rw-rw-r--. 1 zzz zzz 72739 Nov 14 14:37 installed-files.txt
drwxrwxr-x. 12 zzz zzz 4096 Nov 14 14:36 obj
-rw-rw-r--. 1 zzz zzz 788 Nov 14 11:25 previous_build_config.mk
-rw-rw-r--. 1 zzz zzz 1244829 Nov 14 14:37 ramdisk.img
drwxrwxr-x. 3 zzz zzz 4096 Nov 14 11:27 recovery
drwxrwxr-x. 15 zzz zzz 4096 Nov 14 11:28 root
drwxrwxr-x. 6 zzz zzz 4096 Nov 10 17:57 symbols
drwxrwxr-x. 14 zzz zzz 4096 Nov 14 14:36 system
-rw-r--r--. 1 zzz zzz 1610612736 Nov 14 14:37 system.img
-rw-r--r--. 1 zzz zzz 576716800 Nov 14 14:37 userdata.img
[zzz@localhost android-src]$
这些应该如何测试呢？下面再补。
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