Spidermonkey (1)

Spidermonkey source code download: http://ftp.mozilla.org/pub/mozilla.org/js/

 

The testing system Ubuntu 12.04, JS 1.7.0, and JS are decompressed under the/opt/JS path.

tar -zxvf js-1.7.0.tar.gz -C /opt

Spidermonkey compilation steps:

1. log on to the source code directory

cd /opt/js/src

2 compile

make -f Makefile.req

After compilation, the compiled file will be in/opt/JS/src/linux_all_dbg.obj

JS is a JS Interactive Client.

Libjs. So libjs. A is a dynamic and static library.

We also need to manually move a header file, which is probably wrong in their source code.

 mv /opt/js/src/Linux_All_DBG.OBJ/jsautocfg.h /opt/js/src/

 

Next we will write a hello World Program for spidermonkey.

#include "jsapi.h"#include "stdlib.h"#include "string.h"static void usage();int main(int argc,const char* argv[]){if(argc!=2){  usage();  exit(-1);}JSRuntime *runtime = NULL;JSContext *context = NULL;JSObject *global = NULL;const char *script = argv[1];printf("script is \n%s\n", script);jsval rval;if (  (!(runtime = JS_NewRuntime(1024L * 1024L)))  || (!(context = JS_NewContext(runtime, 8192)))  || (!(global = JS_NewObject(context, NULL, NULL, NULL))))return EXIT_FAILURE;if (!JS_InitStandardClasses(context, global))   return EXIT_FAILURE;if (!JS_EvaluateScript(context, global, script, strlen(script), "script", 1, &rval))   return EXIT_FAILURE;printf("the script‘s result is \n%d\n",JSVAL_TO_INT(rval));JS_DestroyContext(context);JS_DestroyRuntime(runtime);JS_ShutDown();return EXIT_SUCCESS;}void usage(){   printf("example1 script_content\n");   printf("for example:./example1 \"var a=1;b=2;a+b\"\n");}

The program is extracted from the Internet and searched for spidermonkey for learning. Most of them use this program.

GCC compilation command

gcc -DXP_UNIX -I/opt/js/src -o excample test.c  -L/opt/js/src/Linux_All_DBG.OBJ -ljs -lm

Compile an excample Program

To run the program, you must also add the system environment variables.

export LD_LIBRARY_PATH=/opt/js/src/Linux_All_DBG.OBJ

Test

./excample "var a=1;var b=2;a+b"

Output

script isvar a=1;var b=2;a+bthe script‘s result is3