root/shell/avmshellUnix.cpp

DEFINITIONS

1. getMainThreadStackLimit
2. setTimer
3. alarmProc
4. GetInstance
5. main

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* 1.1 (the "License"); you may not use this file except in compliance with
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is [Open Source Virtual Machine.].
*
* The Initial Developer of the Original Code is
* Adobe System Incorporated.
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* the Initial Developer. All Rights Reserved.
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*   Adobe AS3 Team
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//unix/solaris

#include "avmshell.h"
#include "PosixPartialPlatform.h"

#include <signal.h>
#include <unistd.h>

#include <sys/resource.h>

namespace avmshell
{
        class UnixPlatform : public PosixPartialPlatform
        {
        public:
                UnixPlatform(void* stackbase) : stackbase(stackbase) {}
                virtual ~UnixPlatform() {}

                virtual void setTimer(int seconds, AvmTimerCallback callback, void* callbackData);
                virtual uintptr_t getMainThreadStackLimit();
                
        private:
                void* stackbase;
        };

        AvmTimerCallback pCallbackFunc = 0;
        void* pCallbackData = 0;
        
        uintptr_t UnixPlatform::getMainThreadStackLimit()
        {
                struct rlimit r;
                size_t stackheight = avmshell::kStackSizeFallbackValue;
                // https://bugzilla.mozilla.org/show_bug.cgi?id=504976: setting the height to kStackSizeFallbackValue
                // is not ideal if the stack is meant to be unlimited but is an OK workaround for the time being.
                if (getrlimit(RLIMIT_STACK, &r) == 0 && r.rlim_cur != RLIM_INFINITY)
                        stackheight = size_t(r.rlim_cur);
                return uintptr_t(&stackbase) - stackheight + avmshell::kStackMargin;
        }
        
        void UnixPlatform::setTimer(int seconds, AvmTimerCallback callback, void* callbackData)
        {
                extern void alarmProc(int);
                
                pCallbackFunc = callback;
                pCallbackData = callbackData;
                
                signal(SIGALRM, alarmProc);
                alarm(seconds);
                
        }
        
        void alarmProc(int /*signum*/)
        {
                pCallbackFunc(pCallbackData);
        }       

}

avmshell::UnixPlatform* gPlatformHandle = NULL;

avmshell::Platform* avmshell::Platform::GetInstance()
{
        AvmAssert(gPlatformHandle != NULL);
        return gPlatformHandle;
}

int main(int argc, char *argv[])
{
        char* dummy;
        avmshell::UnixPlatform platformInstance(&dummy);
        gPlatformHandle = &platformInstance;

        int code = avmshell::Shell::run(argc, argv);
        if (code == avmshell::OUT_OF_MEMORY) {
                // Fascistic warnings settings for Linux64 require the value to be
                // inspected, and a (void) cast is not sufficient.
                if (write(1, "OUT OF MEMORY\n", 14) > 1) {
                        // do nothing
                }
        }
        return code;
}