I now know for sure: mach_task_self() is a constant.

jevinskie · Nov 2, 2011 · 232a92f · 232a92f
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commit 232a92f
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diff --git a/Cydia.mm b/Cydia.mm
@@ -47,7 +47,6 @@ void FinishCydia(const char *finish) {
 }
 
 ForkBugStatus DetectForkBug() {
-    // XXX: I am not certain if I should deallocate this port
     mach_port_t self(mach_task_self());
     int page(getpagesize());
 

diff --git a/DarwinInjector.cpp b/DarwinInjector.cpp
@@ -79,7 +79,6 @@ _extern bool MSHookProcess(pid_t pid, const char *library) {
 
     vm_size_t size(depth + Stack_);
 
-    // XXX: I am not certain if I should deallocate this port
     mach_port_t self(mach_task_self()), task;
     _krncall(task_for_pid(self, pid, &task));
 

diff --git a/MachMemory.cpp b/MachMemory.cpp
@@ -105,7 +105,6 @@ extern "C" SubstrateMemoryRef SubstrateMemoryCreate(SubstrateAllocatorRef alloca
     int page(getpagesize());
 
     mach_port_t reply(mig_get_reply_port());
-    // XXX: I am not certain if I should deallocate this port
     mach_port_t self(mach_task_self());
 
     uintptr_t base(reinterpret_cast<uintptr_t>(data) / page * page);