This commit introduces a new plugin framework into the codebase of the
Mumble client. Note that "plugin" here really refers to a (more or less)
general purpose plugin and is therefore not to be confused with the
previously available positional data plugins (only responsible for
fetching positional data from a running game and passing that to
Mumble).
The plugin interface is written in C, removing the compiler-dependence
the old "plugins" had. Instead plugins can now be written in an
arbitrary language as long as that language is capable of being compiled
into a shared library and also being capable of being C-compatible.
As already indicated a plugin is essentially a shared library that
provides certain functions that allow Mumble to interface with it.
Inside Mumble the so-called PluginManager is responsible for managing
the plugins and relaying events to the respective callbacks. Plugins
themselves can also interact with Mumble on their own initiative by
using the provided API functions.
Fixes#2455Fixes#2148Fixes#1594Fixes#2051Fixes#3742Fixes#4575Fixes#4751
Previously, only module() was present: it retrieved the base address of the specified module.
It worked fine, but it iterated through the process' modules every time it was called.
This commit replaces it with modules(), which returns an std::unordered_map containing all modules.
The map uses the module name as key and Module as value.
Aside from the performance improvement, the new code also provides info for each module region:
- Start address.
- Size.
- Whether it's readable, writable and/or executable.
Since most of the functions are already using C++, why not use classes as well?
This commit introduces the following classes:
- HostLinux: can only be compiled on Linux.
Implements peek() and module().
- HostWindows: can only be compiled on Windows.
Implements peek() and module().
- Process: abstract (cannot be instantiated directly).
Inherits from HostLinux on Linux and from HostWindows on Windows.
Provides functions that can be used with both Linux and Windows processes.
Pure virtual functions are implemented in the following classes:
- ProcessLinux: meant to be used with Linux processes, inherits from Process.
Only implements exportedSymbol(), due to the other functions being universal.
The constructor detects the architecture through the ELF header.
- ProcessWindows: meant to be used with Windows processes, inherits from Process.
Only implements exportedSymbol(), due to the other functions being universal.
The constructor detects the architecture through the NT header.
