a938c4f900
Phase 8 step 3a of the Metal renderer port:
- New library/modules/gpu/ with types.sx (handles + ClearColor +
TextureFormat enum), api.sx (GPU :: protocol { ... } covering the
lifecycle / per-frame / resource / per-draw surface), and metal.sx
(MetalGPU backend implementing the protocol against CAMetalLayer).
Resource handles are 1-based indices into backend List(*void) tables.
MTL aggregates >16 bytes (MTLRegion, MTLScissorRect) pass via *T to
match arm64 Apple's indirect-by-reference ABI; MTLClearColor + CGSize
go through the HFA path as direct fn-pointer casts on objc_msgSend.
- UIKitPlatform got a gpu_mode: GpuMode toggle + sibling SxMetalView
class registration. In metal mode init skips EAGL context, the
did_finish_launching IMP skips the EAGL drawable-properties dict,
layoutSubviews reads the layer's bounds * dpi_scale into pixel_w/h
instead of allocating a GL renderbuffer, and end_frame is a no-op
(the MetalGPU owns its own present).
- examples/63-metal-clear.sx verifies the pipeline end-to-end on iOS
sim — compiles a pass-through MSL shader (packed_float2/packed_float4
to avoid alignment padding), uploads 3 vertices, draws a colored
triangle on a dark-blue clear.
Compiler fixes (filed-and-fixed in this branch):
- inline if X { return E; } followed by a fall-through final expression
no longer emits two terminators into the same basic block. Verified
by examples/83-inline-if-return-fallthrough.sx.
- Top-level type alias Name :: u32; now resolves correctly as the type
annotation on a global variable (was treated as ptr {}, breaking
comparisons + initializers). Verified by examples/84-global-type-alias.sx.
Issue->feature promotion:
- 16 historical examples/issue-NNNN.sx repros now confirmed-fixed and
renamed to focused feature names (67-82). Each gains a
tests/expected/*.txt + .exit pair so the regression suite covers them.
- 5 stale issue repros deleted (subsumed by broader tests).
Regression suite: 68 passing, 0 failed. macOS chess builds + runs; wasm
chess builds; iOS sim GLES chess still renders the full board; iOS sim
Metal demo renders the triangle.
44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
// Assigning to `list.items` writes exactly the items-pointer field even when
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// the element type `T` is larger than the pointer (40-byte BigNode here), so
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// a sibling field of the enclosing struct is not corrupted.
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#import "modules/std.sx";
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// 40-byte struct — triggers the bug.
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// Shrink to [4]s64 (32 bytes) and the bug goes away.
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BigNode :: struct {
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data: [5]s64; // 40 bytes
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}
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Tree :: struct {
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nodes: List(BigNode); // items(8) + len(8) + cap(8) = 24 bytes
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generation: s64; // 8 bytes — total 32 bytes
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}
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Container :: struct {
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tree: Tree;
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sentinel: s64;
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do_work :: (self: *Container) {
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self.tree.nodes.items = xx 0; // BUG: corrupts self.sentinel
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}
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}
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main :: () -> void {
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obj : *Container = xx context.allocator.alloc(size_of(Container));
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memset(obj, 0, size_of(Container));
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obj.sentinel = 0xDEADBEEF;
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print("size_of BigNode = {}\n", size_of(BigNode));
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print("before: sentinel = {}\n", obj.sentinel);
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obj.do_work();
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print("after: sentinel = {}\n", obj.sentinel);
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if obj.sentinel != 0xDEADBEEF {
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print("BUG: sentinel was corrupted!\n");
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} else {
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out("OK\n");
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}
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}
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