Since the buffer memory is managed by the target application, the automatic writing of the buffer to the log files on the disk will not occur if there is an access violation or some other non-recoverable error in the target application. As a performance consideration, log output is flushed to disk only when the output buffer is full. This button will flush the current output buffer. The modules Logexts.dll and Kernel32.dll are always excluded, since Logger is not permitted to log itself. If you wanted to log calls made from all modules except a short list of modules, you would use an exclusion list. For instance, you would use an inclusion list if you only wanted to log calls from one or two module. To facilitate that, Logger allows you to specify a module inclusion list or, alternatively, a module exclusion list. It is often desirable to log only those function calls that are made from a certain module or set of modules. This section controls the module inclusion/exclusion list. COM hooks are not removed because they cannot be re-enabled at will. Disabling logging will cause all API hooks to be removed in an effort to allow the program to run freely. This section contains Enable and Disable radio buttons. This reduces the log file size and also reduces the effect that Logger has on the execution speed of the process. COM hooks are not removed because they cannot be re-enabled at will.Įnabling only certain categories can be useful when you are only interested in a particular type of interaction that the program is having with Windows - for example, file operations. If a category is disabled, the hooks for all APIs in that category will be removed so that there is no longer any performance overhead. However, on subsequent runs, Logger will keep track of which categories are selected for a given target application. The first time you run Logger, all categories will be highlighted. The highlighted categories will be logged the non-highlighted categories will not. This list displays the available API categories. This allows you to configure the Logger settings. Change Settings Dialog BoxĪfter the initialization finishes and the initial display is complete, the Change Settings dialog box will appear. This window will display the progress of Logger. They communicate through a shared section of memory that includes the output file handles, current category mask, and a pointer to the log output buffer.Ī window entitled Logger (debugger) will appear. The Logger.exe utility and the Logexts.dll module are the two components of this Logger vehicle.
This is referred to as "injecting Logger into the target application."
#How to get to windows logger code#
When this is activated, it will load the specified application, and insert code into the target application that will jump off to a routine that loads and initializes Logexts.dll in the target application process. To run it, include the name of the target application on the command line: logger Target This is essentially a very small debugger that can only take a single target. One way to activate Logger is to run the stand-alone Logger.exe program.
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