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= Process Tracker thread =
PM has a separate thread that is waiting for synchronization on process handles.
PM has a separate thread that is waiting for synchronization on process handles.
== State changes ==
When the kernel signals a process handle, it uses svcResetSignal on the process handle and then it uses svcGetProcessInfo to read out the ProcessState.
When the kernel signals a process handle, it uses svcResetSignal on the process handle and then it uses svcGetProcessInfo to read out the ProcessState.
If mask 1 is not set, it immediately does what is otherwise done by the [[#FinalizeDeadProcess]] command.
If mask 1 is not set, it immediately does what is otherwise done by the [[#FinalizeDeadProcess]] command.
== Process launch ==
This thread can also be triggered by the pm:shell [[#LaunchProcess]] cmd.
It uses [[Loader_services|ldr:pm]] GetProgramInfo with the supplied title-id.
If ((*(u8*) (info_output+2)) & 3) is == 1, it goes through the process list and errors if any has bit 0x40 set. Thus only one process can have bit 0x40 set at a time.
It calls [[Loader_services|ldr:pm]] RegisterTitle, then [[Loader_services|ldr:pm]] CreateProcess, then [[Filesystem_services|fsp-pr]] RegisterTitle, then [[Services_API|sm:m]] RegisterTitle.
The second input argument for [[Loader_services|ldr:pm]] CreateProcess is (launch_flags >> 2) & 3.
If launch_flags has mask 1 set, it sets mask 1 in process flags.
If launch_flags flags has mask 0x10 set, it sets mask 8 in process flags.
If ((*(u8*) (info_output+2)) & 3) is == 1, it sets 0x40 in the process flags, and signals the event returned by [[#EnableDebug]].
Finally it does svcStartProcess on the process handle that was returned by [[Loader_services|ldr:pm]] CreateProcess.
Thus at the point of launch, the pid is already registered in ldr, fs, sm, and pm.
= pm:bm =
= pm:bm =
| 3 || GetProcessTitleIdByPid
| 3 || GetProcessTitleIdByPid
|-
|-
| 4 || .. Returns a handle.
| 4 || [[#EnableDebugForTitleId]]
|-
|-
| 5 || GetCrashingProcessPid
| 5 || GetCrashingProcessPid
|-
|-
| 6 || .. Returns a handle.
| 6 || [[#EnableDebug]]
|}
|}
After that, it sets process state to 2.
After that, it sets process state to 2.
== EnableDebugForTitleId ==
Takes a title-id of the program to debug. Sets this to a global field. Next time it gets launched it will be handled differently.
Returns an event handle that is signaled when the requested title is launched.
== EnableDebug ==
Does *not* take a specific title-id as input.
Returns an event handle that is triggered for debug titles.
= pm:info =
= pm:info =
! Cmd || Name
! Cmd || Name
|-
|-
| 0 || LaunchProcess
| 0 || [[#LaunchProcess]]
|-
|-
| 1 || TerminateProcessByPid
| 1 || TerminateProcessByPid
| 8 || [[#GetCrashingProcessPid]]
| 8 || [[#GetCrashingProcessPid]]
|}
|}
== LaunchProcess ==
Takes a title-id and launch_flags. See [[#Process launch]].
== FinalizeDeadProcess ==
== FinalizeDeadProcess ==