cd5b958d19
Introduce the welded comptime `compiler` library (`#library "compiler"` +
`abi(.zig) extern compiler`), per design/comptime-compiler-api.md, and unify
`callconv(...)` into the new `abi(...)` annotation.
abi(...) replaces callconv(...):
- New ABI enum { default, c, zig, pure }; `abi(.c|.zig|.pure)` parses in the
postfix slot before extern/export (and standalone). `kw_callconv` -> `kw_abi`.
- Migrated 52 sx files, the call-convention-mismatch diagnostic, and docs
(readme/specs) from `callconv(.c)` to `abi(.c)`.
Phase 1 — welded compiler library (parse -> registry -> validation -> bridge):
- `abi(.zig) extern compiler` parses on fn decls (carries abi/extern_lib) and
struct decls (StructDecl.abi/extern_lib).
- `#library "compiler"` is the comptime-only internal surface — never dlopen'd.
- src/ir/compiler_lib.zig: the binding registry (the safety boundary). `Field`
welded to StructInfo.Field with layout baked from the real Zig type
(@offsetOf/@sizeOf); `findType`/`findFn`. Welded structs are layout-validated
at registration (field set + total size) as a header checked against the impl.
- Host-call bridge: a `fn abi(.zig) extern compiler` dispatches under the
comptime interp to its registered Zig handler (intern/text_of round-trip),
never dlsym. IR Function.compiler_welded; validated in declareFunction.
- Comptime-only enforcement: a runtime call to a welded fn is a clean
build-gating error (emitCall), not an undefined-symbol link failure.
Phase 2.1 — byte-layout weld foundation:
- Decision: full byte-layout weld (sx struct laid out byte-identically to the
bound Zig type). Registered StructInfo (first non-natural / Zig-reordered
layout). `computeWeldPlan` — pure offset-ordered element plan + padding +
sx-field->LLVM-element remap; unit-tested. Emit/interp wiring is the next
sub-step (2.2+, see current/CHECKPOINT-COMPILER-API.md).
Examples: 0625/0626 (welded struct + fn round-trip), 1183/1184/1185
(layout-mismatch, unexported-fn, runtime-call diagnostics).
55 lines
1.3 KiB
Plaintext
55 lines
1.3 KiB
Plaintext
// `abi(.c)` callbacks accessing struct methods on global pointers —
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// regression coverage for prior data-corruption when the callback dispatches
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// through a global pointer to a method on the pointed-to struct.
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#import "modules/std.sx";
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Pipe :: struct {
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pw: i32;
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ph: i32;
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frame: i32;
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resize :: (self: *Pipe, nw: i32, nh: i32) {
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self.pw = nw;
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self.ph = nh;
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}
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tick :: (self: *Pipe) {
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self.frame = self.frame + 1;
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}
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}
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g_pipe : *Pipe = ---;
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g_width : i32 = 800;
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g_height : i32 = 600;
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do_render :: () {
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g_pipe.resize(g_width, g_height);
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g_pipe.tick();
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print("wrapper: pw={}, ph={}, frame={}\n", g_pipe.pw, g_pipe.ph, g_pipe.frame);
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}
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callback_inline :: (userdata: *void, code: i64) -> bool abi(.c) {
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g_width = xx code;
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g_height = xx (code + 1);
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g_pipe.resize(xx g_width, xx g_height);
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g_pipe.tick();
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print("inline: pw={}, ph={}, frame={}\n", g_pipe.pw, g_pipe.ph, g_pipe.frame);
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true
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}
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callback_wrapper :: (userdata: *void, code: i64) -> bool abi(.c) {
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g_width = xx code;
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g_height = xx (code + 1);
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do_render();
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true
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}
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main :: () {
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pipe := Pipe.{ pw = 0, ph = 0, frame = 0 };
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g_pipe = @pipe;
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callback_inline(xx 0, 320);
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callback_wrapper(xx 0, 640);
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}
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