[GAME BUG]: Taiko no Tatsujin: Drum Session! (CUSA11183) - Crash: Access Violation (0x10c1c00000) on Boot and Music Select

[LuisFellp]

Checklist (we expect you to perform these steps before opening the issue)

• I have searched for a similar issue in this repository and did not find one.
• I am using an official build obtained from releases or updated one of those builds using its in-app updater.
• I have re-dumped the game and performed a clean install without mods and the issue is still present.
• I have disabled all patches and cheats and the issue is still present.
• I have all the required system modules installed.

Describe the Bug

The game is unstable and crashes with a critical signal error ("Unreachable code") resulting in an Access Violation at address 0x10c1c00000.

This crash occurs in two distinct scenarios:
Boot/Loading: The emulator crashes during the initial loading phase while loading system modules (e.g., libSceFontFt.sprx).

Music Select: If the game boots successfully, it consistently crashes when navigating to the "Music Select" menu. The log shows this happens following sceKernelMapNamedFlexibleMemory operations.

Reproduction Steps

1. Launch Taiko no Tatsujin: Drum Session! (CUSA11183) on shadPS4 v0.13.0.
2. Scenario A: Observe crash during the initial loading screen.
3. Scenario B: If the game reaches the main menu, navigate to the "Music Select" option.
4. The emulator will trigger a SignalHandler error and terminate immediately.

Specify OS Version

EndeavourOS / 6.18.7-zen1-1-zen

CPU

AMD Ryzen 7 5700X3D 8-Core Processor

GPU

AMD Radeon RX 9070 XT

Amount of RAM in GB

32GB

Amount of VRAM in GB

16GB

Log File

shad_log.txt

[StevenMiller123]

This is an exception in our GPU thread, as is clear when looking at the error message.

[Debug] <Critical> signals.cpp:86 SignalHandler: Unreachable code!
Unhandled access violation in thread 'shadPS4:GpuComm' at code address 0x7f287c17b96e: Read from address 0x10b7400000

[LuisFellp]

Thanks for the clarification. Since it's an exception in the GPU thread, I have some additional context regarding the timing and memory addressing that might help narrow down the cause:

1. Timing/Execution Speed Dependency:
   I've observed that the time-to-crash correlates directly with how fast I interact with the game.

-If I navigate menus/select songs slowly, the game runs for a significantly longer duration before crashing.
-If I navigate quickly or attempt to restart a song immediately, the crash happens much sooner.

2. Variable Fault Address:
   While the error type (Unhandled access violation in shadPS4:GpuComm) remains the same, the specific address being accessed is changing slightly between sessions.

-Previous Log: Read from 0x10bd40000
-Current Log: Read from 0x10b7400000

This suggests the code is attempting to access a GPU buffer or texture that is either mapped inconsistently, corrupted over time, or subject to a race condition that is sensitive to execution speed.

shad_log.txt