29784c22a8
The session-long set of changes that lay the groundwork for the
Jai-literal implicit-Context-parameter refactor. Lots of accumulated
work; the new arrival is the implicit-ctx foundation (steps 1+2 of
the plan in current/CHECKPOINT-MEM.md):
Step 1 — `CAllocator :: struct {}` stateless allocator in
library/modules/allocators.sx, delegating directly to
libc_malloc/libc_free. `ConstantValue` in src/ir/inst.zig gains a
`func_ref: FuncId` leaf so nested aggregates can carry function
pointers (the inline Allocator value's fn-ptr fields). Switch
sites updated in emit_llvm.zig, print.zig, interp.zig.
Step 2 — `emitDefaultContextGlobal` in src/ir/lower.zig synthesises
a static `__sx_default_context` global with a nested-aggregate
init_val pointing at the CAllocator → Allocator thunks. The
second-pass `initVtableGlobals` in emit_llvm.zig is generalised
to handle `.aggregate` init_vals (re-emits after func_map is
populated so func_ref leaves resolve to real symbols).
Also folded in from earlier work this session:
- Phase 1.1: `xx value` heap-copy in `buildProtocolValue` routes
through `context.allocator` via the new `allocViaContext` helper.
- interp.zig: `marshalForeignArg` double-offset bug fixed —
`heapSlice` already adds `hp.offset` to the slice ptr, so the
extra `+ hp.offset` was scribbling memcpy/memset into adjacent
heap state, corrupting `heap.items[0]`. Symptom: `build_format`
at comptime produced zero bytes, all `print` calls failed.
- Lazy lowering: `lazyLowerFunction` now declares foreign-body
functions as extern stubs in the local (comptime) module so
cross-module foreign calls resolve.
- Allocator API: all stdlib allocators on one-line `init() -> *T`
(CAllocator/GPA: libc-backed; Arena/TrackingAllocator: parent-
backed; BufAlloc: embeds state at head of user buffer).
- issues 0038 (transitive #import), 0039 (chess + stdlib migration
fallout), 0040 (generic struct method dot-dispatch), 0041
(pointer types as type-arg), 0042 (alias name resolution) — all
fixed; regression tests in examples/.
- Diagnostic: `emitError` now embeds the lowering's
`current_source_file` and enclosing function in the literal
message; SX_TRACE_UNRESOLVED=1 dumps a Zig stack trace at the
emit site so misattributed spans can't hide where the failure
is.
- tools/verify-step.sh (all-platforms gate) and tools/scratch.sh
(interp/codegen parity tester) added.
Test suite: 152 example tests pass; chess builds + screenshots on
macOS / iOS sim / Android.
31 lines
1.1 KiB
Plaintext
31 lines
1.1 KiB
Plaintext
// A protocol method declared `-> *void` (literal void-pointer return,
|
|
// NOT `Self`) returns the underlying impl's pointer to the caller
|
|
// unchanged. The dispatch path must NOT auto-load from the result —
|
|
// `*void` outside a `Self`-disguise is a real pointer whose pointee
|
|
// size is unknown.
|
|
//
|
|
// Regression: target_type leaks from the surrounding scope (e.g. the
|
|
// enclosing function's return type). The dispatcher used to auto-load
|
|
// `sizeof(target_type)` bytes from every `*void` return, mistaking
|
|
// real pointers for Self-encoded boxes. Result was that
|
|
// `alloc.alloc(64)` through an Allocator protocol value returned the
|
|
// first 4 bytes of malloc'd memory interpreted as `s32` (= 0 → null).
|
|
|
|
#import "modules/std.sx";
|
|
#import "modules/allocators.sx";
|
|
|
|
main :: () -> s32 {
|
|
gpa := GPA.init();
|
|
alloc : Allocator = xx gpa;
|
|
|
|
p_direct := gpa.alloc(64);
|
|
print("direct: null? {}\n", p_direct == null);
|
|
|
|
p_protocol := alloc.alloc(64);
|
|
print("protocol: null? {}\n", p_protocol == null);
|
|
|
|
print("alloc_count: {}\n", gpa.alloc_count);
|
|
|
|
0;
|
|
}
|