VFS fixes: - GetDirectoryListing(otVDIRECTORY) now returns a heap-allocated snapshot instead of a raw live-tree pointer; FreeDirectoryListing no longer corrupts the VFS tree (fixes page fault on repeated navigation) - volumeGetDirectories: guard LL_Size > 0 before loop to prevent uint32 underflow (0-1 = 0xFFFFFFFF) causing 4B kalloc iterations -> OOM - Free entry^.fileName and dirList in all branches (memory leak fix) iso9660: - equalsIgnoreCase: guard la=0 before loop (same uint32 underflow bug) - readDirectoryEntries/resolvePath: add 65536/256-iter safety caps storagemanager: - Strip debug syslog calls that were allocating 6+ strings per I/O (hundreds of I/Os x 6 allocs exhausted the heap) Process manager: - Per-process FDTable and Cwd initialised on create, freed on reap - proc_await: use pointer-indirection spin per lesson #6 (FPC caches non-volatile reads; raw while flag=0 returns immediately) - graphicsrefresh: move LVGL handler from timer ISR (IF=0) to a dedicated process so LVGL callbacks can call blocking I/O New units: - fdtable.pas: per-process file descriptor table (fd_alloc/get/close) - iorequest.pas: heap allocation helpers for TIORequest - gpt.pas: GPT header/entry read + CRC validation - filepicker.pas: reusable OS-level open/save file picker dialog - notepad.pas: GUI text editor with selection, indent, save-as Shell commands (diskcmd, partcmd, volcmd, diskutil): - Route output to stdout_buf instead of syslog (lesson #4) - diskutil: async add/remove/format partition; cache-based device display Add Apache 2.0 license headers to storagemanager.pas, iso9660.pas, fat32.pas, storagetest.pas Lessons learnt: #9 VFS listing must return snapshot (not live pointer)
Asuro
We welcome everyone to give building/breaking/fixing/shooting Asuro a go, feel free to follow the steps below and mess with Asuro for fun or profit.
Setting up your build environment
Prerequisites
- WSL2 WSL2 is used in conjunction with Docker to predefine a build environment for Asuro.
- Docker for Windows Docker is used to ensure a predefined environment with the correct versions of; Freepascal, Binutils, NASM, Make, xorriso & grub-mk-rescue installed is used for compilation. An ISO will be generated at the end of the build process.
- Git (Obviously) I don't think this needs an explaination.
- VSCode (Optional, but highly recommended)
Visual Studio code is our IDE of choice, and we have a number of recommended plugins.
- PowerShell Plugin by Microsoft This plugin gives you the ability to use the 'PowerShell' task type, allowing the automatic launching of virtualbox with the resulting image generated during compilation of Asuro.
- VirtualBox Virtualbox is our Virtualisation environment of choice, don't ask why, it just is.
Installation (correct as of 2021/06/20)
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Install WSL2 as described in the article linked above & ensure Virtualization is enabled in the BIOS.
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Ensure WSL2 is used by default with the following command:
wsl --set-default-version 2 -
Install Docker for Windows.
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Install Git for Windows.
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Install VSCode & the listed plugins.
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Install VirtualBox (v7+).
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Clone this repository.
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Run the following command in the root of the repo to build the docker image:
docker compose build builder -
Run the following command to compile Asuro:
docker compose run builder -
Create a new virtual machine in Virtualbox and mount the
Asuro.isogenerated in step 9 as a boot image. -
Add the virtualbox installation directory to your
%PATH%environment variable, usually:%PROGRAMFILES%\Oracle\VirtualBox -
Naviage to your virtualbox machines folder, this is usually the following
%userprofile%\VirtualBox VMs\<VM Name>Open the Virtual Machine Definition file (.vbox) in your text editor of choice and find the following line:
<Machine uuid="{7d395c96-891c-4139-b77d-9b6b144b0b93}" name="Asuro" OSType="Linux" snapshotFolder="Snapshots" lastStateChange="2021-06-20T20:33:07Z">Copy the uuid, in our case
7d395c96-891c-4139-b77d-9b6b144b0b93& create alocalenv.jsonfile in the project root with the following content:{ "VirtualBox":{ "MachineName":"<YOUR_UUID_OR_MACHINE_NAME>" } }This will allow VSCode to automatically launch VirtualBox once Asuro has been compiled.
You can also enable the serial adapter "COM1" in mode "Raw File", give it a path, and provide this path in the
localenv.jsonas follows:{ "VirtualBox" : { "MachineName": "<YOUR_UUID_OR_MACHINE_NAME>", "LogLocation": "Fully\\Qualified\\Path\\To\\Your\\Log\\File" } }This will allow you to see the console output from Asuro in your host terminal.
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Open your project folder in VSCode, use CTRL+SHIFT+B to build & F5 to build + run in VBox.
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Congratulations! You can now play with Asuro!
Notes & Gotchas
- The above process has been updated to be compatible with VirtualBox 7+, in which VBoxSDL was removed and vboxmanage should be used in its place. A small wrapper powershell script is used to achieve this.
- It was noted that Windows builds above
20H2seem to have issues installing WSL2. We may have to wait for a patch from Microsoft to fix this. Our devs are currently using build20H2.