debugging context
May 15, 2006 01:26 PM
i'm building a complete extensible ide for angelscript. actually when debugging code, i would like to show at least the current stack variables defined, and i'm doing:
int varNumber = context->GetVarCount ();
if (varNumber > 0)
{
for (int i = 0; i < varNumber; i++)
{
void* varPointer = context->GetVarPointer (i);
currentVarStack <<
context->GetVarDeclaration (i) << " : 0x" <<
String().toHexString((int)varPointer) << "\n";
}
}
else
currentVarStack << "No variables on stack" << "\n";
supportPanel->replaceVariablesText (currentVarStack );
in this code i could determine the declaration of the variables, but i would like to cast the void* to its real value, based on the type id. i means, i don't want to know the value of an object, but i would like to cast the void* to base types value (only bool,int,float...). how can i do that ?
920
May 15, 2006 05:26 PM
The declaration gives you the type of the variable; ultimatly you will have to perform some sort of switch on the type name or use a polymorphic holder class.
May 16, 2006 12:40 PM
i've done already for the basic types, a couple of casts have done the job.
now i need to implement a sort of object property traversing methods...
now i need to implement a sort of object property traversing methods...
920
May 16, 2006 03:13 PM
You have the benefit here of having access to the code that bound those types too. From your other thread, I got the impression you are using DLLs to bind types to angelscript. You could require these DLLs to supply the reflection information as well.
May 16, 2006 03:33 PM
yes i'm defining a new interface for libraries to handle all this stuff...
May 30, 2006 02:53 PM
actually i'm having troubles getting the void* of a callstack variable to be casted to its correct type. i mean, casting basic types is working like this:
String typeDecl = String(*(float*)(varPointer));
but then when i encounter a type id which refer to a "String" object i've tryed everything, but every cast that i make is referring to an object that seems not the type that i expect:
String typeDecl = ((asString *)varPointer)->buffer;
and "String" is the main c++ type for strings that i have here.
the "asString" is the wrapper class that is like this (shortly):
class asString
{
// ...
String buffer;
protected
int refCount;
//...
}
i'm starting thinking that the void* that i get from conext current callstack
is of type asIScriptGeneric or asIScriptStruct. i'm wrong ? i can't cast directly the type that i'm getting from the context ?
String typeDecl = String(*(float*)(varPointer));
but then when i encounter a type id which refer to a "String" object i've tryed everything, but every cast that i make is referring to an object that seems not the type that i expect:
String typeDecl = ((asString *)varPointer)->buffer;
and "String" is the main c++ type for strings that i have here.
the "asString" is the wrapper class that is like this (shortly):
class asString
{
// ...
String buffer;
protected
int refCount;
//...
}
i'm starting thinking that the void* that i get from conext current callstack
is of type asIScriptGeneric or asIScriptStruct. i'm wrong ? i can't cast directly the type that i'm getting from the context ?
June 01, 2006 10:34 AM
For all non-primitives, you're actually receiving a pointer to a pointer, because that's how the objects are stored on the script stack.
You'll need to do the following:
Regards,
Andreas
You'll need to do the following:
String typeDecl = (*(asString**)varPointer)->buffer;Regards,
Andreas
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June 02, 2006 02:36 AM
i'm doing like this, but no success.
i'm still getting leaks when i try to access str->buffer, from debugging i see that it cannot resolve the proper cast to the object. ah the string wrapper is registered extending the asCScriptString example, with the same constructor, addref/release alloc and string factory functions. what i'm doing wrong ?
// debug mode script line callback...int varNumber = context->GetVarCount ();if (varNumber > 0){ for (int i = 0; i < varNumber; i++) { void* varPointer = context->getVarPointer (i); int typeID = engine->getTypeIdByDecl (0, context->GetVarDeclaration (i)); String varSerialized = engine->serializeVariableFromTypeId (typeID, varPointer); currentCallStack << "[0x" << String().toHexString((int)varPointer) << "] : " << context->GetVarDeclaration (i) << " = " << varSerialized << "\n"; }}// the serializeVariableFromTypeId implementationString ScriptableEngine::serializeVariableFromTypeId (const int typeID, void* varPointer){ String typeDecl = getTypeDeclaration (typeID); if (typeDecl == T("bool")) { typeDecl = String((int)*(bool*)(varPointer)); } else if (typeDecl == T("int8") || typeDecl == T("int16") || typeDecl == T("int32") || typeDecl == T("int")) { typeDecl = String(*(int*)(varPointer)); } else if (typeDecl == T("uint8") || typeDecl == T("uint16") || typeDecl == T("uint32") || typeDecl == T("uint")) { typeDecl = String((int)*(unsigned int*)(varPointer)); } else if (typeDecl == T("float")) { typeDecl = String(*(float*)(varPointer)); } else if (typeDecl == T("double")) { typeDecl = String(*(double*)(varPointer)); } else if (typeDecl == T("String")) { asString* str = *((asString**) varPointer); typeDecl = str->buffer; } else { typeDecl = extensionManager->serializeVariableFromTypeDecl (typeDecl,varPointer); if (typeDecl == String::empty) typeDecl = T("???"); } return typeDecl;}i'm still getting leaks when i try to access str->buffer, from debugging i see that it cannot resolve the proper cast to the object. ah the string wrapper is registered extending the asCScriptString example, with the same constructor, addref/release alloc and string factory functions. what i'm doing wrong ?
June 02, 2006 10:01 PM
I just made a test for this to make sure that it really works as I'm saying it should work.
This is the function that I wrote to print the variables in the call stack:
It works just fine, with the following output:
I can't see what might be wrong with your code. It seems to be correct.
This is the function that I wrote to print the variables in the call stack:
void PrintVariables(asIScriptContext *ctx, int stackLevel){ int numVars = ctx->GetVarCount(stackLevel); asIScriptEngine *engine = ctx->GetEngine(); for( int n = 0; n < numVars; n++ ) { int typeId = engine->GetTypeIdByDecl(0, ctx->GetVarDeclaration(n, 0, stackLevel)); if( typeId == engine->GetTypeIdByDecl(0, "int") ) { print(" %s = %d\n", ctx->GetVarDeclaration(n, 0, stackLevel), *(int*)ctx->GetVarPointer(n, stackLevel)); } else if( typeId == engine->GetTypeIdByDecl(0, "string") ) { print(" %s = '%s'\n", ctx->GetVarDeclaration(n, 0, stackLevel), (*(asCScriptString**)ctx->GetVarPointer(n, stackLevel))->buffer.c_str()); } }}It works just fine, with the following output:
--- call stack ---Module1:void main():8,2 int a = 1 string s = 'text'Module2:void Test2():5,2 int b = 2I can't see what might be wrong with your code. It seems to be correct.
AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game
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