# Changelog

All notable changes to rocjitsu are documented here.
Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
Versioning follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [0.3.0] - 2026-07-17

### Added
- Public `rj_daemon_start()`, `rj_daemon_stop()`, and `rj_daemon_status()` APIs
  for hosting a daemon-mode VM and its Unix-socket RPC server in
  `librocjitsu`

### Changed
- Use the shared daemon lifecycle implementation from both the RocJitsu CLI and
  Mirage, eliminating their duplicate RPC server implementations
- Accept JSON configuration contents directly in `rj_daemon_start()` while
  retaining path-based configuration at the frontend command-line interfaces
- Harden daemon startup and shutdown with stale-socket recovery, socket
  identity checks, active-client interruption, and ordered thread cleanup

## [0.2.0] - 2026-06-23

### Changed
- Serve the amdgpu/DRM ioctl ABI natively so upstream libdrm_amdgpu runs
  unmodified over the simulator; DRM device discovery and queries are handled at
  the syscall layer instead of by intercepting libdrm library symbols
- **BREAKING:** `rj_vm_device_open()` now takes a connecting client's PID:
  `rj_vm_device_open(vm, rj_client_pid_t client_pid, uint32_t *process_id)`. The
  new `rj_client_pid_t` is a fixed-width (`int32_t`) typedef so the public header
  stays OS- and ABI-width-agnostic. Pass 0 in local mode; a nonzero PID enables
  daemon-mode process reuse and cross-process memory access

### Added
- Daemon-mode multi-process client support: per-client process reuse,
  client-PID identification via SO_PEERCRED, and cross-process GPU memory access
- Vendored kernel DRM UAPI headers (drm.h, amdgpu_drm.h, drm_mode.h) for native
  amdgpu ioctl struct fidelity

## [0.1.0] - 2026-06-04

### Added
- Daemon-based GPU simulator via LD_PRELOAD interposition
- ISA execution engine with codegen pipeline (10 AMDGPU targets + RISC-V)
- AQL packet dispatch with doorbell-monitored hardware queues
- Multi-GPU topology with per-GPU command processors
- KFD driver emulation (ioctls, mmap, event system, VMID page tables)
- HIP kernel tests (vector_add, memcpy, GEMM)
- RCCL collective tests (AllReduce, Broadcast, AllGather, ReduceScatter, SendRecv)
- CLI with local, daemon, and attach modes
- JSON-configurable SoC topology