google V8 javascript引擎编译测试

最新推荐文章于 2019-03-15 08:03:04 发布

huareal

最新推荐文章于 2019-03-15 08:03:04 发布

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本文记录了在Cygwin环境下编译V8 JavaScript引擎的过程，包括下载源码、依赖项配置及遇到的编译错误和解决方法。通过修改平台相关代码，最终成功编译并生成了库文件。

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上次编译了Gumbo，接着来看看V8 JavaScript引擎吧，下载了v8-trunk

复制到f:/pbase/v8-trunk

接下来在cygwin下编译

cd /cygdrive/f/pbase/v8-trunk

然后执行命令

make dependencies

会陆续下载一系列的包和编译所以来的内容

A    third_party/icu/patches/uloc.patch
A    third_party/icu/patches/data.build.win.patch
A    third_party/icu/patches/ios_timezone.patch
A    third_party/icu/patches/wpo.patch
A    third_party/icu/patches/gcc46.patch
A    third_party/icu/patches/pmac.h.patch
A    third_party/icu/patches/vscomp.patch
A    third_party/icu/patches/data.build.patch
Checked out revision 214189.

在cygwin下，输入如下命令

签出cygwin：

svn co http://src.chromium.org/svn/trunk/deps/third_party/cygwin third_party/cygwin

签出python：

svn co http://src.chromium.org/svn/trunk/tools/third_party/python_26 third_party/python_26

签出gyp:

svn co http://gyp.googlecode.com/svn/trunk build/gyp

然后执行编译

huareal@gpx /cygdrive/f/pbase/v8-trunk
# make ia32.release.check
PYTHONPATH="/cygdrive/f/pbase/v8-trunk/tools/generate_shim_headers:" \
        GYP_GENERATORS=make \
        build/gyp/gyp --generator-output="out" build/all.gyp \
                      -Ibuild/standalone.gypi --depth=. \
                      -Dv8_target_arch=ia32 \
                      -S.ia32 -Dv8_enable_backtrace=1 -Darm_fpu=default -Darm_float_abi=default
cygwin warning:
MS-DOS style path detected: C:\Users\huareal/.gyp
Preferred POSIX equivalent is: /cygdrive/c/Users/huareal/.gyp
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
    http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
make[1]: Entering directory `/cygdrive/f/pbase/v8-trunk/out'
ACTION tools_gyp_v8_gyp_js2c_target_js2c /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj/gen/libraries.cc
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/accessors.o
开始编译了

编译过程是比较慢，可以喝点茶，等一等

会输出很多类似的编译记录

CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/mark-compact.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/marking-thread.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/messages.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/objects-debug.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/objects-printer.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/objects-visiting.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/objects.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/once.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/optimizing-compiler-thread.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/parser.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/preparse-data.o

编译结果出现错误

../src/platform-posix.cc: In static member function ‘static void v8::internal::OS::ProtectCode(void*, size_t)’:
../src/platform-posix.cc:139: error: ‘DWORD’ was not declared in this scope
../src/platform-posix.cc:139: error: expected `;' before ‘old_protect’
../src/platform-posix.cc:140: error: ‘PAGE_EXECUTE_READ’ was not declared in this scope
../src/platform-posix.cc:140: error: ‘old_protect’ was not declared in this scope
../src/platform-posix.cc:140: error: ‘VirtualProtect’ was not declared in this scope
../src/platform-posix.cc: In static member function ‘static void v8::internal::OS::Guard(void*, size_t)’:
../src/platform-posix.cc:154: error: ‘DWORD’ was not declared in this scope
../src/platform-posix.cc:154: error: expected `;' before ‘oldprotect’
../src/platform-posix.cc:155: error: ‘PAGE_READONLY’ was not declared in this scope
../src/platform-posix.cc:155: error: ‘PAGE_GUARD’ was not declared in this scope
../src/platform-posix.cc:155: error: ‘oldprotect’ was not declared in this scope
../src/platform-posix.cc:155: error: ‘VirtualProtect’ was not declared in this scope
make[1]: *** [/cygdrive/f/pbase/v8-trunk/out/ia32.release/obj.target/v8_base.ia32/src/platform-posix.o] Error 1
make[1]: Leaving directory `/cygdrive/f/pbase/v8-trunk/out'
make: *** [ia32.release] Error 2

尝试用如下命令编译

make native mode=debug library=shared snapshot=on

依然有上述错误，看了platform-posix.cc的文件存在错误

修改代码：platform-posix.cc的行139,154对应的代码，屏蔽DWORD的引用，保留mprotect(address, size, PROT_READ | PROT_EXEC);和

mprotect(address, size, PROT_NONE);

代码如下

// Get rid of writable permission on code allocations.
void OS::ProtectCode(void* address, const size_t size) {
//#if defined(__CYGWIN__)
// DWORD old_protect;
// VirtualProtect(address, size, PAGE_EXECUTE_READ, &old_protect);
//#elif defined(__native_client__)
// The Native Client port of V8 uses an interpreter, so
// code pages don't need PROT_EXEC.
// mprotect(address, size, PROT_READ);
//#else
mprotect(address, size, PROT_READ | PROT_EXEC);
//#endif
}

// Create guard pages.
void OS::Guard(void* address, const size_t size) {
//#if defined(__CYGWIN__)
// DWORD oldprotect;
// VirtualProtect(address, size, PAGE_READONLY | PAGE_GUARD, &oldprotect);
//#else
mprotect(address, size, PROT_NONE);
//#endif
}

继续编译

CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/preparser/preparser/preparser-process.o
CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/preparser/src/preparser-api.o
LINK(target) /cygdrive/f/pbase/v8-trunk/out/native/preparser
CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/v8/src/v8dll-main.o
SOLINK(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/tools/gyp/libv8.so
COPY /cygdrive/f/pbase/v8-trunk/out/native/lib.target/libv8.so
CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/shell/samples/shell.o
LINK(target) /cygdrive/f/pbase/v8-trunk/out/native/shell
CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/process/samples/process.o
LINK(target) /cygdrive/f/pbase/v8-trunk/out/native/process
CXX(target) /cygdrive/f/pbase/v8-trunk/out/native/obj.target/lineprocessor/samples/lineprocessor.o

貌似已经编译成功，接下来继续编译tes的内容

LINK(target) /cygdrive/f/pbase/v8-trunk/out/native/cctest
TOUCH /cygdrive/f/pbase/v8-trunk/out/native/obj.target/build/All.stamp
make[1]: Leaving directory `/cygdrive/f/pbase/v8-trunk/out'

编译完毕，

手动把

F:\pbase\v8-trunk\out\native\lib.target\libv8.so复制到/usr/lib下即可