v0.13.0 (Atlas)

We are proud to announce the latest version of Unikraft, v0.13.0 (Atlas)! Along with many fixes, this release comes with a bunch of new features that are worth your attention!

This release includes a breaking change which affects output unikernel binary name. See native Firecracker support for details.

🚀 New Features#

• Update parser in lib/uklibparam (#882) by Simon Kuenzer
• Support escaping of quotes in lib/ukargparse (#893) by Simon Kuenzer
• Add support for environment variables in lib/posix-environ (#868) by Simon Kuenzer
• Support for environment variables with lib/posix-environ in Musl (lib-musl#43) by Simon Kuenzer
• Add README.md file for 9pfs in lib/9pfs (#837) by Delia Pavel
• Extend prsyscall in lib/syscall_shim (print structs, ...) (#836) by Marc Rittinghaus
• Dynamically allocate struct mount paths (#826) by Dinh Ngoc Tu
• Port the testsuite to the new scheduling APIs in lib/posix-futex/test (#809) by Nour-eddine Taleb
• Add per-lcpu variable definition (#784) by Andra Paraschiv
• Add README.md file in lib/vfscore (#780) by Radu Nichita
• Add README.md file in lib/nolibc (#778) by Alexandru Calciu
• Implement a more robust compiler detection in build (#774) by Marco Schlumpp
• Add Codacy code quality status badge to README.md in doc (#764) by Aryan Verma
• Firecracker boot protocol support in plat/kvm (#760) by Marco Schlumpp
• Implement subset of FUTEX_WAIT_BITSET in lib/posix-futex (#758) by Marco Schlumpp
• Add an empty implementation of ioctl to eventfd in lib/posix-event (#756) by Marco Schlumpp
• Add syscall alias to uk_syscall in lib/syscall_shim (#755) by Marco Schlumpp
• Implement the EFD_NONBLOCK flag for eventfd in lib/posix-event (#754) by Marco Schlumpp
• Merge .gcc_except_tables in plat/common (#753) by Marco Schlumpp
• Compile all source files for ISR context in lib/ukvmem (#751) by Marco Schlumpp
• Use -ffreestanding compiler flag in lib/nolibc (#740) by Răzvan Deaconescu
• Use 48-bit virtual addressing for PARange >= 52 in plat/kvm/arm (#729) by Eduard Vintilă
• Improve unwind information for x86 architecture in plat/x86 (#700) by Marco Schlumpp
• Improve nolibc compatibility in lib/nolibc (#627) by Marco Schlumpp
• Add synchronization mechanisms (#476) by Sairaj Kodilkar
• Update description of Musl support in README (lib-musl#49) by Răzvan Deaconescu
• Update newlib to the latest Unikraft version (#28) by Eduard Vintilă
• Update pthread-embedded to the latest Unikraft version (#11) by Eduard Vintilă
• Add linux definitions patch (#34) by Teodor Țeugea
• Add SOCK_NONBLOCK to accept4() and socket() (#33) by Marc Rittinghaus
• Improve README.md for app-elfloader (app-elfloader#7) by Simon Kuenzer
• VFS and native dynamic loader support (app-elfloader#17) by Simon Kuenzer

🐛 Bug Fixes & Improvements#

• Add semicolon to DPRINTF macro in lib/vfscore (#890) by Răzvan Deaconescu
• Initialize lists for stdio_vnode in lib/vfscore (#889) by Răzvan Deaconescu
• Avoid recursive locking in sys_rename in lib/vfscore (#888) by Marc Rittinghaus
• Add missing errno include in lib/ukswrand (#887) by Marc Rittinghaus
• Fix I/O error on fsync with 9P2000.u in lib/uk9p, lib/9pfs (#886) by Marc Rittinghaus
• Start TID numbering from 1 in lib/posix-process (#885) by Florin Postolache
• Fix file path resolution for 9pfs setup in lib/vfscore (#883) by Andra Paraschiv
• Disable compiler control flow protection in build (#881) by Andrei Tătar
• Modify pointer comparison in lib/{nolibc,isrlib} (#880) by Maria Sfîrăială
• Add additional recognised Git trailers to checkpatch in support/scripts (#879) by Alexander Jung
• Fix memory region setup and issue #766 in plat/linuxu (#878) by Sergiu Moga
• Fix register names for clang in plat/kvm/x86 (#877) by Ștefan Jumărea
• fs0 for automounting 9pfs in lib/vfscore (#875) by Simon Kuenzer
• Handle FIONBIO command in pipe_ioctl() in lib/vfscore (#874) by Eduard Vintilă
• Fix Python ascii codec can't decode byte in support/scripts (#873) by Florin Postolache
• Change vnops to take constant strings in lib/vfscore (#866) by Marc Rittinghaus
• Fix dup, utimensat, and futimens in lib/vfscore (#865) by Marc Rittinghaus
• Add ukarch_fetch_sub in uk/arch (#864) by Răzvan Vîrtan
• Fix ioctl() on device files (+ cleanup) in /lib/devfs, /lib/ukswran (#855) by Marc Rittinghaus
• Fix file flags for O_NONBLOCK and O_ASYNC (#850) by Marc Rittinghaus
• Remove clone3 syscall in lib/posix-process (#847) by Teodor Țeugea
• Apply LIBxxx_COMPFLAGS{,-y} to C++ too in build (#845) by Dinh Ngoc Tu
• Fix cast to invalid type in 9p.c (#844) by Hugo Lefeuvre
• Fix potential free(NULL) in lib/vfscore (#843) by Hugo Lefeuvre
• Use page alignment macros everywhere (#842) by Hugo Lefeuvre
• Remove unreachable NULL checks in ukalloc (#840) by Hugo Lefeuvre
• Fix unchecked uk_palloc value in xen/x86/mm.c (#839) by Hugo Lefeuvre
• Various fixes for application compatibility (#834) by Marc Rittinghaus
• Fix compilation and loading of linuxu images in plat/linuxu (#833) by Marco Schlumpp
• Allow non-writable shared file mappings in lib/ukvmem (#832) by Cosmin Vancea
• Fix symlink support for 9pfs in 9pfs, vfscore (#830) by Andra Paraschiv
• Fix wrong type for the st_nlink field inside struct stat in lib/nolibc (#829) by Cosmin Vancea
• Fix build warnings in lib/posix-process (#820) by Konstantinos Koukopoulos
• Force update UK_CONFIG in build/Makefile (#817) by Tianyi Liu
• Fix for Issue #730 in lib/uksglist (#813) by Vineeth Krishna M
• Handle a full tracing buffer correctly in lib/ukdebug (#810) by Marco Schlumpp
• Fix issues in FDT functions in plat/drivers/ofw (#805) by Eduard Vintilă
• Detect if gawk can be used instead of awk in build (#803) by Simon Kuenzer
• Add a simple test for mmap and munmap in lib/ukmmap (#802) by Kha Dinh
• Remove warnings related to timespec in lib/nolibc (#800) by Takeru Wada
• Fix posix-mmap errno issue (#799) by Teodor Țeugea
• Update uio_offset and uio_resid on successful reads in lib/posix-event (#798) by Eduard Vintilă
• Add comments to 9pfs.h file (#794) by Delia Pavel
• Change the SECINFO_EXP regex to be more permissive in support/scripts (#792) by Florin Postolache
• Fix double fault and failing mmap (#790) by Marc Rittinghaus
• Add write-combined page entry attribute in plat/x86 (#788) by Marco Schlumpp
• Ensure the .eh_frame section stays in plat/common (#776) by Marco Schlumpp
• Fix type of revents pointer in lib/posix-event (#775) by Marco Schlumpp
• Change unhandled IRQ message to a tracepoint in plat/kvm (#768) by Marco Schlumpp
• Fix interrupt flag check in drivers/virtio (#761) by Marco Schlumpp
• Ensure the ifpages metadata does not break any alignments in lib/ukalloc (#757) by Marco Schlumpp
• Disable default LIBMUSL_COMPLEX in Config.uk (lib-musl#47) by Răzvan Deaconescu
• Fix ioctl signature in function definition in patches (lib-musl#44) by Ștefan Jumărea
• Fix ioctl signature (lib-musl#42) by Marc Rittinghaus
• Various fixes (lib-musl#41) by Marco Schlumpp
• Add option to disable character maps in locale (lib-musl#40) by Dinh Ngoc Tu
• Apply -ffreestanding for the Musl source code (lib-musl#35) by Marco Schlumpp
• Use -ffreestanding as internal build option in Makefile.uk (lib-newlib#33) by Răzvan Deaconescu
• Add *_OK flags in fcntl.h header in include (#32) by Ștefan Jumărea
• Return address from previous brk() context on follow-up request (#15) by Andra Paraschiv
• Fix argv parsing (app-elfloader#13) by Cosmin Vancea
• Align the stack pointer at a 16-byte boundary at function calls (#9) by Cosmin Vancea

A big thank you also to all those who helped in the review process: Adina Smeu, Alexander Jung, Alexandru Calciu, Alexandru Apostolescu, Andra Paraschiv, Andrei Tătar, Cezar Crăciunoiu, Delia Pavel, Dragoș Petre, Eduard Mihăilescu, Eduard Vintilă, Florin Postolache, Gabriel Mocanu, Teodor Țeugea, Luca Serițan, Marco Schlumpp, Marc Rittinghaus, Maria Sfîrăială, Michalis Pappas, Radu Nichita, Rareș Miculescu, Răzvan Deaconescu, Răzvan Vîrtan, Robert Kuban, Sergiu Moga, Simon Kuenzer, Ștefan Jumarea, Teodor Tiron, Tu Dinh Ngoc, Vlad Bădoiu.