Mono - Lua

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The advanced Mono features of Cheat Engine are controlled by the "monoscript.lua" script in the autorun directory where cheat engine is installed. When you attach to a process, the script scans for "mono.dll". If it is found, the appropriate MonoDataDissector dll from the autorun directory is injected into the process which creates a named pipe waiting for a connection. The LUA code then connects to the pipe and messages are exchanged to perform the mono functions.


Contents

[edit] Main Methods

LaunchMonoDataCollector()
injects the dll and returns 0 for failure, or monoBase returned from the CMD_INITMONO command on the pipe
varType = monoTypeToVarType(monoType)
Returns the Cheat Engine type (vtString, vtByte, vtWorkd, vtDword, vtSingle, vtDouble, vtPointer) for the given mono type
mono_object_getClass(address)
returns classId, className of the class at the given address in memory
mono_enumDomains()
returns a table array of domainaddress for each domain in the game
mono_setCurrentDomain(domainId)
returns ? (result of MONOCMD_SETCURRENTDOMAIN)
sets the domain the MonoDataCollector will use
mono_enumAssemblies()
returns table of assemblyId for each assembly in the current domain from the MonoDataCollector
mono_getImageFromAssembly(assemblyId)
returns the imageId for the passed assembly
mono_image_get_name(imageId)
returns the name of the assembly with the given imageId
mono_image_enumClasses(imageId)
returns a table of classId for classes in the given assembly image
mono_class_getName(classId)
returns the class name as a string
mono_class_getNamespace(classId)
returns the namespace of the given class as a string
mono_class_getParent(classId)
returns the classId of the parent class of the given class
mono_class_getStaticFieldAddress(domainId, classId)
returns the base address for a special area that stores static addresses for a given class. For example if you have a class that has 5 static fields, their offsets will be added to this base address to get the memory location
mono_class_enumFields(classId)
returns a table of field objects for fields in the given class
field - the field id
type - ?? the Cheat Engine type? (i.e. vtByte, vtWord, vtString, etc?)
monotype - ?? the mono type?
parent - ?? the class id?
offset - the offset in bytes from the structure base address
flags - ??
isStatic - true/false - if true, offset is into static address, use mono_class_getStaticFieldAddress
name - field name
typename - name of the type with namespace (i.e. "System.Int32")
mono_class_enumMethods(classId)
returns a table of method objects for the methods in the given class
method - method id
name - string name of the method
mono_getJitInfo(address)
returns a result object with the properties given the address of code in memory
method - the method id
code_start - address where method code begins
code_size - length of code in bytes
mono_image_findClass(imageId, namespace, className)
returns the classId of the given class name and namespace in an image
mono_findClass(namespace, className)
returns the classId of the given class name and namespace
mono_class_findMethod(classId, methodName)
returns the methodId of a certain method in a class
mono_findMethod(namespace, className, methodName)
returns the methodId of a certain method, calls mono_image_findClass and mono_class_findMethod
mono_method_getName(methodId)
returns the name of a method given the id
mono_method_getHeader(methodId)
returns a headerId??
mono_method_getSignature(methodId)
returns result, parameternames, returntype
result - ?? string
parameterNames - table of strings representing parameter names
returnType - string?? - mono type string?
mono_method_disassemble(methodId)
returns a string - ?? the IL code ??
mono_method_getClass(methodId)
returns the classId a method belongs in
mono_compile_method(methodId)
JIT a method if it wasn't compiled yet, returns the address of the method
mono_free_method(methodId)
(no return value) - only works on dynamic method, and only if profiler isn't being used
mono_methodheader_getILCode(methodHeader)
returns address, size
address - address of start of IL code?
size - size of IL code?
mono_getILCodeFromMethod(methodId)
combination of mono_method_getHeader and mono_methodheader_getILCode
mono_iamge_rva_map(imageId, offset)
?? not sure what this is ??
mono_loadAssemblyFromFile(fname)
loads a c# assembly in the target process
mono_invoke_method(domainId, methodId, address, args...)
Lets you invoke a method with the given arguments. args is a tablearray of record with value and type

[edit] Cheat Engine Hooks

mono_initialize()
sets up hooks, calls old open process hook if there was one, calls syncrhonize("mono_OpenProcessMT")
mono_OpenProcessMT(t)
if parameter is not nil, calls t.destroy(), enumerates modules looking for 'mono.dll', adds menu item to cheat engine main form
mono_OpenProcess(processid)
mono_structureDissectOverrideCallback(structure, baseaddress)
Called by CE when a structure is being dissected to fill in the values if we know the structure
Returns true if the structure members were defined, nil if not
Calls mono_object_findRealStartOfObject(baseaddress), mono_class_enumFields(classaddress), monoTypeToVarType(monotype)
mono_structureNameLookupCallback(address)
Returns classname,currentaddress (the real base address) or nil
Called by CE when creating a new structure in the structure dissector
mono_symbolLookupCallback(symbol)
returns pointer or nil
called by CE when it is trying to find the address to go with a symbol
calls mono_findMethod and mono_compile_method
mono_addressLookupCallback(address)
returns string
called by CE in the disassembly window to show a symbol name for the address
calls mono_getJitInfo(address), mono_method_getClass(method), mono_class_GetName(class), mono_class_GetNamespace(class), mono_method_getName(method)


[edit] Mono Dissector Methods

monoform_killform(sender)
monoform_miShowILDisassemblyClick(sender)
monoform_miRejitClick(sender)
monoform_miGetILCodeClick(sender)
monoform_EnumImages(node)
monoform_EnumClasses(node)
monoform_EnumFields(node)
monoform_EnumMethods(node)
mono_TVExpanding(sender, node)
mono_TVCollapsing(sender, node)
monoform_FindDialogFind(sender)
monoform_miFindClick(sender)
monoform_miExpandAllClick(sender)
monoform_miSaveClick(sender)
mono_dissect()
miMonoActivateClick(sender)
miMonoDissectClick(sender)


[edit] See also

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