debugging context
Author
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 ?
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.
Author
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...
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.
Author
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 ?
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
Author
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 ?
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.
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