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Dynamic patch hooks

As of version 3.3, HookCase now supports dynamically adding patch hooks for raw function pointers. This is useful in hooks for methods that use callbacks -- for example CFMachPortCreate() and CFRunLoopObserverCreate().

Hooks for these methods, and their callbacks, are implemented by the example hook library under Examples/dynamic-hooking. Build the library, then use it with any complex application (say a web browser) to see how it works.

For example:

    HC_INSERT_LIBRARY=/full/path/to/hook.dylib /Applications/Safari.app/Contents/MacOS/Safari