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# General * Expose an optional `get_alias` API as an alternative to `get_config` in Luau.Require and Luau.RequireNavigator. * Improve the Luau CLI's virtual filesystem implementation to fix bugs related to `init.luau`. Fixes https://github.com/luau-lang/luau/issues/1816 # New Type Solver * Avoid double reporting errors when erroneous arguments are provided to type functions. * Fix some instances of unresovable cyclic type functions in loops by only considering the first loop cycles. This results in some type inference inaccuracies when the type of a variable in loop through multiple iterations. Fixes https://github.com/luau-lang/luau/issues/1413. * Better generalize free types that have meaningful lower and upper bounds, especially for table indexers. * Report more specific errors when assigning or returning table literal types, instead of citing the *entire* table type. * Inference for functions with generic type packs is greatly improved. * Fix some internal compiler exceptions when using type-stating functions like `table.freeze` in `if _ then _ else _` expressions and short circuiting binary operations. * More consistently simplify unions of primitive types, especially in array-like and dictionary-like tables. * Fix a crash when type checking an erroneous type alias containing `typeof` with a type assertion expression, as in: ``` type MyTable = {} -- This will error at type checking time as it's a duplicate type MyTable = typeof(setmetatable(SomeTable :: {}, SomeMetaTable)); ``` * Fix a crash when inferring the type of an index expression where the indexee is invalid (e.g. `nil`). # Runtime * Avoid throwing an exception from `luau_load` if we run out of memory. * Type functions are no longer compiled and included in bytecode. Fixes #1817. * Fix some instances of Luau C API functions reading invalid debug information (generally when the first or last instruction of a block was being inspected). Fixes #1369. * Avoid potential signed integer overflow when doing bounds checks on tables. * Support 16 byte aligned userdata objects when system allocation alignment is also 16 bytes. * Fix memory leaks in `Luau.Require` when using VM build with no exceptions. Fixes #1827. --------- Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: James McNellis <jmcnellis@roblox.com> Co-authored-by: Sora Kanosue <skanosue@roblox.com> Co-authored-by: Talha Pathan <tpathan@roblox.com> Co-authored-by: Varun Saini <vsaini@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
67 lines
2 KiB
C++
67 lines
2 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#pragma once
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#include "Luau/RegisterA64.h"
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#include "Luau/RegisterX64.h"
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#include <initializer_list>
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#include <vector>
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#include <stddef.h>
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#include <stdint.h>
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namespace Luau
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{
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namespace CodeGen
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{
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// This value is used in 'finishFunction' to mark the function that spans to the end of the whole code block
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inline constexpr uint32_t kFullBlockFunction = ~0u;
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class UnwindBuilder
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{
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public:
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enum Arch
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{
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X64,
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A64
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};
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virtual ~UnwindBuilder() = default;
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virtual void setBeginOffset(size_t beginOffset) = 0;
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virtual size_t getBeginOffset() const = 0;
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virtual void startInfo(Arch arch) = 0;
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virtual void startFunction() = 0;
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virtual void finishFunction(uint32_t beginOffset, uint32_t endOffset) = 0;
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virtual void finishInfo() = 0;
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// A64-specific; prologue must look like this:
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// sub sp, sp, stackSize
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// store sequence that saves regs to [sp..sp+regs.size*8) in the order specified in regs; regs should start with x29, x30 (fp, lr)
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// mov x29, sp
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virtual void prologueA64(uint32_t prologueSize, uint32_t stackSize, std::initializer_list<A64::RegisterA64> regs) = 0;
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// X64-specific; prologue must look like this:
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// optional, indicated by setupFrame:
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// push rbp
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// mov rbp, rsp
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// push reg in the order specified in regs
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// sub rsp, stackSize
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virtual void prologueX64(
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uint32_t prologueSize,
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uint32_t stackSize,
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bool setupFrame,
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std::initializer_list<X64::RegisterX64> gpr,
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const std::vector<X64::RegisterX64>& simd
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) = 0;
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virtual size_t getUnwindInfoSize(size_t blockSize) const = 0;
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// This will place the unwinding data at the target address and might update values of some fields
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virtual size_t finalize(char* target, size_t offset, void* funcAddress, size_t blockSize) const = 0;
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};
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} // namespace CodeGen
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} // namespace Luau
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