RISC-V sandboxing library Files

It's a new release which coincides with a fix for an awful bug. Highlights:

• Loading programs is now 35-50% faster. See the thread on it for some initial benchmarks.
• Zig C++ toolchain now has Windows support.
• Zig C++ toolchain now has working C++ exceptions (fixed by an ELF loading issue).
• Trimmed the size of the overall emulator by at least 256 bytes. This resulted in reaching 2M req/s in the Drogon benchmark.
• You can now pass std::vector to vmcall(). The contents will be pushed on the stack and a pointer to the first element is put in an argument register.
• Added support for libtcc on macOS and Windows (although only Windows is properly tested).
• Added guest abstractions for C++ std::vector and std::string, which I've written about here.
• Added a RISCV_MACHINE_ALIGNMENT macro that can be overridden, for toolchains that don't have working aligned new/delete support.
• Fix a horrible conversion issue with FCVT.S.W and FCVT.S.WU. More information here.

What's Changed

• Move debug_printer into DebugMachine and RSPClient by @fwsGonzo in https://github.com/libriscv/libriscv/pull/262
• Don't push pre-loaded program headers on the stack by @fwsGonzo in https://github.com/libriscv/libriscv/pull/266
• Add Zig toolchain support for unit tests by @fwsGonzo in https://github.com/libriscv/libriscv/pull/268
• Simplify realize_fastsim a bit, making it potentially faster by @fwsGonzo in https://github.com/libriscv/libriscv/pull/270
• Add defines for major and minor version by @fwsGonzo in https://github.com/libriscv/libriscv/pull/272
• Remove binary translation register tracking (for now) by @fwsGonzo in https://github.com/libriscv/libriscv/pull/275
• Simplify TCC build script by @fwsGonzo in https://github.com/libriscv/libriscv/pull/274
• Add system include path for TCC on Linux by @fwsGonzo in https://github.com/libriscv/libriscv/pull/276
• Remove experimental timed VM calls by @fwsGonzo in https://github.com/libriscv/libriscv/pull/280
• Trim the size of the Machine structure a bit by @fwsGonzo in https://github.com/libriscv/libriscv/pull/281
• Stub ppoll on Windows, returning 0 by @fwsGonzo in https://github.com/libriscv/libriscv/pull/282
• Implement and stub a bunch of system calls on Windows by @fwsGonzo in https://github.com/libriscv/libriscv/pull/284
• Re-organize the gamedev example by @fwsGonzo in https://github.com/libriscv/libriscv/pull/285
• Add abstractions for arena-allocated objects with string and vector specializations by @fwsGonzo in https://github.com/libriscv/libriscv/pull/286
• Fix RSP Server using wrong format spec for 64bit variables on Win by @dedmen in https://github.com/libriscv/libriscv/pull/287
• Add GuestRef<T> abstraction and std::span support for GuestStdVector by @fwsGonzo in https://github.com/libriscv/libriscv/pull/288
• Use RISCV_MACHINE_ALIGNMENT macro to configure alignments by @fwsGonzo in https://github.com/libriscv/libriscv/pull/289
• Fix conversion issue with FCVT.S.W and FCVT.S.WU by @fwsGonzo in https://github.com/libriscv/libriscv/pull/290

New Contributors

• @dedmen made their first contribution in https://github.com/libriscv/libriscv/pull/287

Full Changelog: https://github.com/libriscv/libriscv/compare/v1.11...v1.12