2b592d7e3c
This fixes a bug where resolveStructLayout to was promoting from stale value_arena state which was then overwrriten when another ArenaAllocator higher in the call stack saved its state back. This resulted in the memory for struct_obj.optmized_order overlapping existing allocations. My initial fix in c7067ef wasn't sufficient, as it only checked if the struct being resolved had the same owner as the current sema instance. However, it's possible for resolveStructLayout to be called when the sema instance has a different owner, but the struct decl's value_arena is currently in use higher up in the callstack. This change introduces ValueArena, which holds the arena state as well as tracks if an arena has already been promoted from it. This allows callers to use the value_arena storage without needing to be aware of another user of this same storage higher up in the call stack.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
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- Chapter 0 - Getting Started | ZigLearn.org
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License
The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.
Zig is intended to be used to help end-users accomplish their goals. Zig should be used to empower end-users, never to exploit them financially, or to limit their freedom to interact with hardware or software in any way.
However, such problems are best solved with social norms, not with software licenses. Any attempt to complicate the software license of Zig would risk compromising the value Zig provides.
Therefore, Zig is available under the MIT (Expat) License, and comes with a humble request: use it to make software better serve the needs of end-users.
This project redistributes code from other projects, some of which have other licenses besides MIT. Such licenses are generally similar to the MIT license for practical purposes. See the subdirectories and files inside lib/ for more details.