int VMFrameStack::Call(VMFunction *func, VMValue *params, int numparams, VMReturn *results, int numresults, VMException **trap)
{
bool allocated = false;
try
{
if (func->Native)
{
return static_cast<VMNativeFunction *>(func)->NativeCall(this, params, numparams, results, numresults);
}
else
{
AllocFrame(static_cast<VMScriptFunction *>(func));
allocated = true;
VMFillParams(params, TopFrame(), numparams);
int numret = VMExec(this, static_cast<VMScriptFunction *>(func)->Code, results, numresults);
PopFrame();
return numret;
}
}
catch (VMException *exception)
{
if (allocated)
{
PopFrame();
}
if (trap != NULL)
{
*trap = exception;
return -1;
}
throw;
}
catch (...)
{
if (allocated)
{
PopFrame();
}
throw;
}
}
int VMCall(VMFunction *func, VMValue *params, int numparams, VMReturn *results, int numresults/*, VMException **trap*/)
{
bool allocated = false;
try
{
if (func->VarFlags & VARF_Native)
{
return static_cast<VMNativeFunction *>(func)->NativeCall(params, func->DefaultArgs, numparams, results, numresults);
}
else
{
auto code = static_cast<VMScriptFunction *>(func)->Code;
// handle empty functions consisting of a single return explicitly so that empty virtual callbacks do not need to set up an entire VM frame.
// code cann be null here in case of some non-fatal DECORATE errors.
if (code == nullptr || code->word == (0x00808000|OP_RET))
{
return 0;
}
else if (code->word == (0x00048000|OP_RET))
{
if (numresults == 0) return 0;
results[0].SetInt(static_cast<VMScriptFunction *>(func)->KonstD[0]);
return 1;
}
else
{
VMCycles[0].Clock();
VMCalls[0]++;
auto &stack = GlobalVMStack;
stack.AllocFrame(static_cast<VMScriptFunction *>(func));
allocated = true;
VMFillParams(params, stack.TopFrame(), numparams);
int numret = VMExec(&stack, code, results, numresults);
stack.PopFrame();
VMCycles[0].Unclock();
return numret;
}
}
}
#if 0
catch (VMException *exception)
{
if (allocated)
{
PopFrame();
}
if (trap != NULL)
{
*trap = exception;
return -1;
}
throw;
}
#endif
catch (...)
{
if (allocated)
{
GlobalVMStack.PopFrame();
}
throw;
}
}
int VMFrameStack::Call(VMFunction *func, VMValue *params, int numparams, VMReturn *results, int numresults, VMException **trap)
{
bool allocated = false;
try
{
if (func->Native)
{
return static_cast<VMNativeFunction *>(func)->NativeCall(this, params, numparams, results, numresults);
}
else
{
AllocFrame(static_cast<VMScriptFunction *>(func));
allocated = true;
VMFillParams(params, TopFrame(), numparams);
int numret = VMExec(this, static_cast<VMScriptFunction *>(func)->Code, results, numresults);
PopFrame();
return numret;
}
}
catch (VMException *exception)
{
if (allocated)
{
PopFrame();
}
if (trap != NULL)
{
*trap = exception;
return -1;
}
throw;
}
catch (EVMAbortException exception)
{
if (allocated)
{
PopFrame();
}
if (trap != nullptr)
{
*trap = nullptr;
}
Printf("VM execution aborted: ");
switch (exception)
{
case X_READ_NIL:
Printf("tried to read from address zero.");
break;
case X_WRITE_NIL:
Printf("tried to write to address zero.");
break;
case X_TOO_MANY_TRIES:
Printf("too many try-catch blocks.");
break;
case X_ARRAY_OUT_OF_BOUNDS:
Printf("array access out of bounds.");
break;
case X_DIVISION_BY_ZERO:
Printf("division by zero.");
break;
case X_BAD_SELF:
Printf("invalid self pointer.");
break;
}
Printf("\n");
return -1;
}
catch (...)
{
if (allocated)
{
PopFrame();
}
throw;
}
}
