luajit2.0.0 -- 段错误 : 11

Question

我使用 http://lua-users.org/wiki/SimpleLuaApiExample 中的一个简单示例进行测试。该示例可以成功静态链接libluajit.a，但运行时出现以下错误消息:

Segmentation fault: 11

我使用的是2012年11月8日发布的LuaJIT-2.0.0。我的操作系统是 Mac OSX Lion 10.7.5。

$ uname -a
Darwin macmatoMacBook-Pro.local 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64

测试步骤:

编译luajit-2.0.0

$ cd lj2
$ ls
COPYRIGHT Makefile  README    doc       dynasm    etc       src
$ make
==== Building LuaJIT 2.0.0 ====
make -C src
DYNLINK   libluajit.so
LINK      luajit
OK        Successfully built LuaJIT
==== Successfully built LuaJIT 2.0.0 ====
$ rm src/*.so            # force to use the static version: libluajit.a
$ cd ..

编译并运行示例应用

test.c和script.lua都来自 here 。文件夹lj2包含上面luajit-2.0.0的源码，刚刚编译成功。

$ ls
lj2 script.lua test.c 

使用 clang 编译器

$ clang -o test test.c -I./lj2/src -L./lj2/src -lluajit
$ ./test
Segmentation fault: 11

使用gcc编译器

$ gcc -o test test.c -I./lj2/src -L./lj2/src -lluajit
$ ./test 
Segmentation fault: 11

<小时/>

但是如果我用 test.c 替换 lj2/src/luajit.c ，它会给我成功。这很奇怪。见下文:

$ cd lj2
$ make clean
$ mv src/luajit.c src/luajit.c.orig 
$ cp ../test.c src/luajit.c
$ make
$ cp src/luajit ../
$ cd ..
$ ./luajit
The table the script received has:
1   2
2   4
3   6
4   8
5   10
Returning data back to C
Script returned: 30  

Answer 1

问题已解决。本页有一节解释了如何嵌入 LuaJIT:
http://luajit.org/install.html

• If you're building a 64 bit application on OSX which links directly or indirectly against > LuaJIT, you need to link your main executable with these flags:

  -pagezero_size 10000 -image_base 100000000

Also, it's recommended to rebase all (self-compiled) shared libraries which are loaded at runtime on OSX/x64 (e.g. C extension modules for Lua). See: man rebase

现在，让我再测试一下:

$ clang -o test test.c -O3 -I./lj2/src -L./lj2/src -lluajit -pagezero_size 10000 -image_base 100000000
$ ./test 
The table the script received has:
1   2
2   4
3   6
4   8
5   10
Returning data back to C
Script returned: 30

valgrind 返回

$ valgrind ./test
bad executable (__PAGEZERO is not 4 GB)
valgrind: ./test: cannot execute binary file

这是另一个问题。