For every sx-defined #objc_class, emit a C-callconv -dealloc IMP
that runs at refcount-zero. Frees the sx state struct, nils the
ivar, then chains to [super dealloc] so NSObject's runtime
cleanup (object_dispose, associated-object teardown, KVO, etc.)
runs as usual.
-dealloc IMP (self: id, _cmd: SEL) -> void
state = object_getIvar(self, load @__<Cls>_state_ivar)
free(state) // free(NULL) is safe
object_setIvar(self, ivar, NULL)
sup = alloca { receiver: *void, super_class: *void }
sup.receiver = self
sup.super_class = load @__<Cls>_class
sel_dealloc = sel_registerName("dealloc")
objc_msgSendSuper2(&sup, sel_dealloc)
return
Two new per-class globals:
- '__<Cls>_class' : *void — populated by emit_llvm's
class-pair init constructor with the freshly-allocated Class
pointer (after objc_registerClassPair).
- The existing '__<Cls>_state_ivar' is also consulted to find
the state struct.
The -dealloc IMP is registered on the class itself (instance
method) via class_addMethod with encoding 'v@:'. emit_llvm
ALSO stores cls_val into '__<Cls>_class' so the trampoline
can build the objc_super struct.
internStringConstantGlobal helper added to lower.zig — interns
C strings as [N:0]u8 globals with byte-level aggregate inits.
Used here for the 'dealloc' selector string.
147-objc-class-dealloc-roundtrip.sx verifies end-to-end on
macOS: alloc + release fires the IMP, and a second alloc/release
cycle proves runtime state isn't corrupted. class_getMethod-
Implementation confirms the IMP is registered.
176 example tests pass (+1). zig build test green.
Still gated: sx-side 'obj.method()' calls bail at lower.zig:4407
with the existing diagnostic. A.7 opens the gate — last sub-step
of M1.2.
For every sx-defined #objc_class, emit a C-callconv +alloc IMP
that the Obj-C runtime calls when '[Cls alloc]' fires (from sx
code, UIKit instantiation, Info.plist principal class, etc.):
+alloc IMP (cls: Class, _cmd: SEL) -> id
instance = class_createInstance(cls, 0)
state = malloc(STATE_SIZE)
memset(state, 0, STATE_SIZE)
object_setIvar(instance, load(@__<Cls>_state_ivar), state)
return instance
STATE_SIZE = max(typeSizeBytes(state struct), 1) — always at
least one byte so the ivar is never null after +alloc returns.
The IMP is registered on the METACLASS (class methods live there
— every Class object's isa points to the metaclass) in emit_llvm's
class-pair init constructor:
metaclass = object_getClass(cls)
sel_alloc = sel_registerName("alloc")
class_addMethod(metaclass, sel_alloc, alloc_imp, "@@:")
That override wins over NSObject's default +alloc; runtime
instantiations get the __sx_state ivar bound automatically.
Per-instance allocator binding (the plan's full design — store
the Allocator value in the state struct so -dealloc frees through
the same one) is deferred. libc malloc/free is fine for v1; we'll
upgrade once Month 4's autoreleasepool + ARC ops shake out.
REFACTOR: collapsed five duplicate 'get<Name>Fid' helpers and
their cache fields (object_getIvar, object_setIvar,
class_createInstance, malloc, memset) into a single
'ensureCRuntimeDecl(name, params, ret) -> FuncId'. The helper
checks for an existing decl by name first (avoids the
'class_createInstance.1' duplicate-symbol crash when stdlib's
'#foreign' decl is already in the module). One helper instead
of one-per-function = ~150 lines deleted.
object_getIvar / object_setIvar added to stdlib std/objc.sx
so user code can use them too (146 exercises object_getIvar
to verify __sx_state was bound to a non-null state pointer
after +alloc).
146-objc-class-alloc-roundtrip.sx end-to-end against macOS:
'[SxFoo alloc]' returns non-null AND object_getIvar(instance,
__sx_state) returns the state ptr. Real Obj-C runtime, no
mocks.
175 example tests pass (+1). zig build test green.
For each instance method on a sx-defined '#objc_class', the
class-pair init constructor now:
sel = sel_registerName("selector_string")
imp = @__<Cls>_<method>_imp (M1.2 A.4b.ii)
class_addMethod(cls, sel, imp, "<encoding>")
before objc_registerClassPair. The IMP trampoline (A.4b.ii)
already bridges C-ABI -> sx body. With registration in place,
'objc_msgSend(obj, sel_bump)' now routes to the trampoline,
which reads __sx_state ivar and forwards to '@<Cls>.<method>'.
To get selector + type-encoding strings out of lower.zig and
into emit_llvm, ObjcDefinedClassEntry gains a 'methods' slice:
pub const ObjcDefinedMethodEntry = struct {
sel: []const u8, // mangled selector (M1.2 A.1's deriveObjcSelector)
encoding: []const u8, // type encoding (M1.2 A.1's objcTypeEncodingFromSignature)
imp_name: []const u8, // C-callconv trampoline symbol
};
registerObjcDefinedClassMethods populates this when it declares
each method's body function; Module.setObjcDefinedClassMethods
attaches the slice to the cache entry by name. Static (class-
side) methods are skipped — A.4b only covers instance methods;
class-method hooks like '+layerClass' land in M2.1.
emit_llvm reads entry.methods and emits class_addMethod inside
the per-class init block, before objc_registerClassPair (the
runtime locks the method list at register time on some SDK
versions).
145-objc-class-method-dispatch.sx verifies end-to-end:
class_getMethodImplementation(SxFoo, sel_registerName("bump"))
returns non-null after main starts. Both niladic ('bump') and
single-arg ('add:') selectors checked.
Still gated (A.7): sx-side 'obj.bump()' calls. The dispatch
gate at lower.zig:4407 hasn't opened — A.5 (+alloc) and A.6
(-dealloc) need to land first so the integration test
ffi-objc-defined-class-01-instance.sx (full state round-trip)
can exercise the full lifecycle.
174 example tests pass (+1 from 145). zig build test green.
For each bodied instance method on a sx-defined #objc_class,
emit a C-callconv trampoline function '__<Cls>_<method>_imp':
void __SxFoo_bump_imp(ptr obj, ptr _cmd, ...user_args) {
ivar = load @__SxFoo_state_ivar
state = object_getIvar(obj, ivar)
call @SxFoo.bump(__sx_default_context, state, ...user_args)
ret
}
The trampoline bridges the Obj-C runtime's IMP calling convention
('id self, SEL _cmd, ...args' as C ABI) to the sx body's
default-callconv shape ('__sx_ctx ptr, state ptr, ...user_args').
Implicit context comes from '&__sx_default_context'; the body
keeps its sx-side personality intact and can use 'self.field'
through the substituted state-struct pointer (M1.2 A.2b + A.3).
New helpers in lower.zig:
- 'getObjcObjectGetIvarFid' lazily declares object_getIvar.
- 'emitObjcDefinedClassImps' + 'emitObjcDefinedClassImp' walk the
cache and synthesise each trampoline.
- 'lookupGlobalIdByName' for finding the per-class ivar handle
global. Linear scan — same N-is-small rationale as the other
Obj-C caches.
Dead code at this commit: the trampolines exist in the module
but no class_addMethod call registers them with the runtime.
'objc_msgSend(obj, sel_bump)' would still fall through to the
parent class (NSObject 'doesNotRecognizeSelector:') today.
A.4b.iii wires up class_addMethod in emit_llvm's class-pair-init
constructor — that's when the trampolines come alive.
142's IR snapshot refreshed to show the trampoline.
173 example tests pass. zig build test green.
Class-pair init constructor now registers a single hidden ivar
on each sx-defined class:
class_addIvar(cls, "__sx_state", 8, 3, "^v")
before objc_registerClassPair. After the class is registered,
the constructor calls class_getInstanceVariable to fetch the
runtime Ivar handle and stores it in a per-class global
'__<ClassName>_state_ivar : *void'. Trampolines (A.4b.ii) will
read this global to 'object_getIvar' the state struct pointer.
lower.zig declares the per-class global at scan time
(declareObjcDefinedStateIvarGlobal) so emit_llvm finds it by
name when populating. Encoding '^v' = void* (a generic pointer
— the runtime treats it as opaque storage). log2 alignment = 3
for 8-byte pointer alignment on 64-bit.
144-objc-class-ivar-registration.sx exercises the round-trip:
after main starts, class_getInstanceVariable(SxFoo, "__sx_state")
returns non-null. Runs against the real Obj-C runtime on macOS.
142's IR snapshot refreshed to include the new constructor body
(class_addIvar + class_getInstanceVariable + ivar-global store).
173 example tests pass (+1 from 144). zig build test green.
For every sx-defined '#objc_class', emit a module-init constructor
that registers the class with the Obj-C runtime at module load.
Pattern mirrors the Phase 3.1 emitObjcClassInit companion:
'@llvm.global_ctors' + ORC-JIT main injection.
Constructor body, per cache entry:
super = objc_getClass("<ParentName>") // default NSObject
cls = objc_allocateClassPair(super, "<ClassName>", 0)
objc_registerClassPair(cls)
Parent is read from the foreign_class_decl's '.extends' member;
absent ⇒ NSObject (matches M1.2 A.0 spec). Class-name strings
go through new emitPrivateCString helper that mirrors the
selector-init / class-init shape.
Two new small helpers extracted while we were here:
- lazyDeclareCRuntime — declare-once extern wrapper for Obj-C
runtime APIs.
- appendModuleCtor — append-or-create global_ctors + ORC-JIT
injection, factored out of emitObjcClassInit.
143-objc-class-registration.sx exercises the round-trip on
macOS: after main starts, objc_getClass("SxFoo".ptr) returns
non-null. Runs against the real Obj-C runtime.
142's IR snapshot updated — the constructor + ctors metadata
are now part of the expected shape.
DEFERRED (A.4b): method-IMP registration (class_addMethod with
a C-ABI trampoline that reads __sx_state ivar and calls the sx
body). DEFERRED (A.5+): synthesized +alloc / -dealloc IMPs and
the '__sx_state' ivar setup.
172 example tests pass (+1 from 143). zig build test green.
Adds Pass 4b 'lowerObjcDefinedClassMethods' to lowerRoot: after
scan, walk objc_defined_class_cache and force-lower each bodied
instance method. The Obj-C runtime invokes these via the IMP
pointers wired up in A.4 — no sx-side call path drives lazy
lowering, so we trigger it here. Mirrors the JNI eager-lower
pattern in Pass 5.
Bug fix: lazyLowerFunction has its OWN inline body-lowering
path (separate from lowerFunction) that re-resolves param types
at line 1025. It was running without current_foreign_class set,
so '*Self' fell through to the type_bridge fallback and got
interned as a 0-field struct named 'Self' — body's
'self.counter' GEP'd into '{}' and LLVM verification rejected.
Fix: set current_foreign_class at the top of lazyLowerFunction
via the same lookupObjcDefinedClassForMethod path lowerFunction
uses. Save+restore via defer.
A.3 ('self.field access via the ivar') falls out for free —
'*Self' resolves to '*__SxFooState' so 'self.counter' is a
plain struct field access. IR snapshot in
142-objc-class-method-lowering.ir shows the round-trip:
define internal void @SxFoo.bump(ptr, ptr self) {
%gep = getelementptr inbounds { i32 }, ptr %self, 0, 0
%v = load i32, ptr %gep
store i32 (%v + 1), ptr %gep
ret void
}
171 examples pass (+1 from 142); zig build test green.
Still gated: Obj-C runtime dispatch (A.7) — sx-side
'f.bump()' calls bail at lower.zig:4407 with the existing
diagnostic. IMP-trampoline emission (the C-ABI shim that bridges
'objc_msgSend' → this body) lands in A.4 alongside class-pair
init.
Bodied instance methods on a sx-defined '#objc_class("Cls") { ... }'
declaration are now registered in fn_ast_map under '<Cls>.<method>'
and declared in the IR with their *Self params substituted to
the hidden state-struct type (M1.2 A.2a).
registerObjcDefinedClassMethods walks the foreign_class_decl's
members, synthesizes an FnDecl from each ForeignMethodDecl (zipping
params + param_names), and feeds it through declareFunction with
current_foreign_class temporarily pinned so resolveTypeWithBindings
substitutes Self → __SxFooState.
resolveTypeWithBindings now treats type_expr 'Self' as a contextual
alias: when current_foreign_class points to a sx-defined Obj-C
class, the substitution returns objcDefinedStateStructType(fcd).
Other Self contexts (protocols, JNI super, foreign-class member
type resolution) are untouched — the check filters on (!is_foreign
and runtime == .objc_class).
lowerFunction also sets current_foreign_class for the duration of
the body lowering when the name is qualified <Cls>.<method> and
Cls is in objc_defined_class_cache. Save+restore via defer so
nested calls round-trip cleanly.
Verification (manual): 'sx ir' on an sx-defined class shows
'declare void @SxFoo.bump(ptr, ptr)' — two args = implicit
__sx_ctx + the state-struct pointer (correct *Self substitution).
Body emission happens lazily; A.2c will trigger it eagerly so
the IMP trampoline (A.4) can reference it.
170 example tests + zig build test green.
Builds (and interns) the hidden sx-state struct type for an
sx-defined '#objc_class'. Layout:
__<ClassName>State {
user_field_0,
user_field_1,
...
}
This struct is what the runtime's '__sx_state' ivar points at —
separate from the Obj-C object itself, which stays opaque. The
sx method bodies will operate on '*__SxFooState' (after '*Self'
substitution in A.2b) so 'self.field' resolves to a plain struct
field access — A.3's 'free if types align' premise.
M1.2 A.5 will prepend '__sx_allocator: Allocator' so dealloc can
free through the per-instance allocator. Field-by-name access
stays correct across the future repositioning.
Methods / '#extends' / '#implements' members are ignored — only
'.field' contributes. Three unit tests pin: typical-field case,
empty-class case, mixed-member case.
Dead code at this commit — helper isn't called yet. A.2b (body
lowering with '*Self' substitution) wires it in. 170 example
tests + zig build test green.
Derives Apple's runtime type-encoding string from an IR method
signature. Called by class_addMethod(cls, sel, imp, types) when
M1.2 A.4+ synthesise IMPs for sx-defined classes.
Layout: <ret> @ : <param0> <param1> ... — @ is the receiver,
: is _cmd. Caller passes user-declared params AFTER stripping
'self: *Self'.
Encoding table:
v=void B=bool c=s8/BOOL s=s16 i=s32 q=s64
C=u8 S=u16 I=u32 Q=u64 f=f32 d=f64
@=foreign Obj-C class ptr #=Class :=SEL
*=[*]u8 (C string) ^v=any other ptr
bool (sx i1) maps to 'B' (C99 _Bool); s8 to 'c' (Apple's BOOL).
Foreign-class pointers detected via foreign_class_map lookup on
the pointee struct name. Other pointers fall to ^v — encoding is
metadata, not ABI, so conservative is safe.
Struct / slice / closure / etc. BAIL via diagnostic
(ObjcEncodingUnsupported) rather than silently mis-encoding, per
CLAUDE.md rejected-patterns rule. Future passes will widen the
table as new shapes show up in real IMPs.
Dead code at this commit — helper isn't called yet. Three unit
tests in src/ir/lower.test.zig pin the primitive / pointer /
Obj-C-class-pointer encodings before A.2 wires the helper in.
170 example tests + zig build test green.
Adds an insertion-ordered cache on Module for sx-defined Obj-C
classes — every '#objc_class("Cls") { ... }' declaration WITHOUT
'#foreign'. registerForeignClassDecl appends the entry alongside
its existing foreign_class_map insert; lookup helper available
via Module.lookupObjcDefinedClass.
ObjcDefinedClassEntry { name, *const ast.ForeignClassDecl }
The pointer back into the AST lets later passes (M1.2 A.1+) walk
'members' for fields / methods / '#extends' / '#implements'
without duplicating that data on the entry. Insertion order
matters because class-pair init constructors (A.4) must register
parent classes before children — 'objc_allocateClassPair(super,
...)' resolves super by lookup.
Infrastructure only — no observable behavior change. The cache
is populated but not yet read; A.1+ start pulling from it. 170
example tests + zig build test green.
Extends parseForeignClassDecl ([src/parser.zig:1262]) with an
arrow arm that mirrors the existing parseFnDecl shape — single-
expression body wrapped in a one-statement block so downstream
lowering sees the same AST as a brace-body method.
Closes the M1.0 surface: '=> expr;' is now valid for top-level
functions, struct methods, AND '#objc_class' member methods.
The sx-defined class lowering (A.7 dispatch gate) is still gated,
so 140-expression-bodied-objc-method.sx exercises parse-only —
the body is reachable but the method is never invoked. When M1.2
lights up sx-defined class instantiation, the arrow-body form
will flow through unchanged.
169 examples pass (+1 from 140 now green); zig build test green.
`inferExprType` for a chained call `Cls.static().instance(...)` never
looked the inner call's foreign-class declaration up, so the outer
dispatch saw a `.s64` receiver, the `foreign_class_map.get(...)` lookup
missed, and lowering emitted `error: unresolved 'method'`. The macOS
target appeared to work because `inline if OS == .ios { ... }` strips
the gated body before lowering — eliding every call that would have
exercised the broken path.
The "lazy-lower" framing in the original issue file was a red herring.
Fix in `src/ir/lower.zig`:
1. `inferExprType` for `.call` with `.field_access` callee now checks
`foreign_class_map` for both shapes — `Cls.static_method(args)` (object
identifier matches a foreign-class alias, look up static members) and
`inst.instance_method(args)` (receiver is a pointer to a foreign-class
struct, look up non-static members).
2. New helpers `resolveForeignMethodReturnType` and
`resolveForeignClassMemberType` substitute `*Self` / `Self` to the
foreign-class struct so a `*Self` return doesn't synthesize a phantom
`Self`-named struct that future dispatches can't resolve.
3. The Obj-C lowering paths (`lowerObjcMethodCall`, `lowerObjcStaticCall`)
route through the same helper for `ret_ty` so the IR Ref's type matches
what `inferExprType` reports.
Regression test at `examples/138-foreign-class-chained-dispatch.sx`
exercises NSObject's `+alloc` / `-init` chain in both shapes —
`*NSObject` return then `*Self` return, and `*Self` then `*Self`. Runs
on the host (macOS) for live exercise; non-macOS hosts fall through to
a stub matching the expected output.
This unblocks Phase 3.2 C4/C5 — the `UIWindow.alloc().initWithWindowScene(scene)`
pattern that surfaced the bug is the cluster's bread-and-butter shape.
167/167 example tests; chess builds clean on macOS, iOS-sim, Android.
Make-green half of the cadence step started in A1. Wires the
`#selector` directive end-to-end:
- Lexer token `hash_selector` at src/token.zig + lookup row in
src/lexer.zig.
- AST field `selector_override: ?[]const u8 = null` on
`ForeignMethodDecl` (src/ast.zig).
- Parser block in src/parser.zig that mirrors
`#jni_method_descriptor` — both occupy the same slot after the
optional `-> ReturnType` and before the body/terminator. Not
mutually exclusive at parse time.
- LSP semantic-token list (src/lsp/server.zig) updated.
- Lowering: `deriveObjcSelector` returns
`{ sel, keyword_count, is_override }`. When `is_override` is true,
the selector string is the user's literal and `keyword_count` is
the colon count in that literal. Both `lowerObjcMethodCall` and
`lowerObjcStaticCall` use the result.
Diagnostic policy when override colon-count ≠ call arity:
- Default mangling path: stays an error (`.err`). The user can fix
the sx-side name to produce the right keyword count.
- Override path: downgrades to a warning (`.warn`). Rationale:
Obj-C's `objc_msgSend` doesn't validate colon-vs-arg the way JNI's
`GetMethodID` validates the descriptor — the runtime dispatches
regardless and the wrong-arity case becomes silent calling-
convention corruption. The compiler is the last line of defense
for this typo class, but the warning preserves the override's
escape-hatch character (deliberate mismatches still proceed).
Snapshot for `examples/ffi-objc-dsl-06-selector-override.sx` flips
from the pre-3.2 parser-error to working output:
static override non-null: true
The mismatch diagnostic text in
`examples/ffi-objc-dsl-04-mismatch.sx`'s snapshot is updated to
drop the "once that lands (3.2)" phrasing now that 3.2 is here.
165/165 example tests.
`static name :: ...` was redundant — instance methods always declare
`self: *Self` as their first param by convention. The parser now derives
`is_static` from the first param's TYPE: if it's `*Self` the method is
an instance method; anything else (including no params at all) is a
class method. Removes a token from the surface, keeps the dispatch
behavior identical.
The receiver param's NAME doesn't matter — only its type. Calling the
first param `this`, `me`, `receiver`, etc. is fine as long as the type
is `*Self`. This mirrors how the rest of sx handles receiver dispatch.
Migration of every site that used the keyword:
- `library/modules/platform/android.sx` — `SurfaceView.new(ctx)`.
- `examples/ffi-jni-class-03-static.sx` — `Math.abs(n)`.
- `examples/ffi-jni-main-03-ctor.sx` — `SurfaceView.new(ctx)` in the
`#jni_main` body.
- `examples/ffi-objc-dsl-05-static.sx` — NSObject's `.class()` /
`.description()`.
164/164 example tests; chess clean on macOS / iOS sim / Android via
`tools/verify-step.sh`.
Implementation half of the Phase 3.1 cadence step.
`lowerForeignStaticCall` for `#objc_class` / `#objc_protocol` runtimes
no longer bails; it routes through a new `lowerObjcStaticCall` helper
that loads the class object from a module-scoped cached slot (populated
once per module via `objc_getClass`) and dispatches `objc_msg_send`
with the same selector-mangling as Phase 3.0's instance dispatch.
Three pieces:
1. `Module.objc_class_cache` — parallel to `objc_selector_cache`,
insertion-ordered list of (class_name, slot_GlobalId) so the
constructor that calls `objc_getClass` per slot at module load
is deterministic. `lookupObjcClass` / `appendObjcClass` accessors.
2. `internObjcClassObject` in lower.zig — get-or-create a
`OBJC_CLASSLIST_REFERENCES_<Cls>` global pointer; matches clang's
naming convention. `lowerObjcStaticCall` reuses
`deriveObjcSelector` from 3.0 for the selector, loads the class
slot, and emits `objc_msg_send(class_obj, sel, args)`.
3. `emitObjcClassInit` in emit_llvm.zig — companion to
`emitObjcSelectorInit`. Walks `objc_class_cache`, synthesizes a
constructor `__sx_objc_class_init` that calls `objc_getClass(name)`
per slot, registers in `@llvm.global_ctors` for AOT (extending the
existing array if the selector init already created it), and
injects a direct call into main's prelude after any prior init
calls so the ORC JIT path runs it too.
Surface form is `.` (`NSObject.class()`) matching JNI's `Alias.new(...)`
convention rather than the plan's notional `::` — avoids extending the
parser for a new postfix operator with no other use case.
Test `examples/ffi-objc-dsl-05-static.sx` exercises NSObject's
`+class` and `+description` class methods via the new syntax, asserts
both return non-null. NSObject is always available at module-load,
unlike runtime-created test classes that wouldn't exist yet when
the class-init constructor runs.
164/164 tests; chess builds + runs clean on all three platforms.
Implementation half of the cadence step started in the previous commit.
`lowerForeignMethodCall` for `#objc_class` / `#objc_protocol` runtimes
no longer bails; it routes through a new `lowerObjcMethodCall` helper
that derives the Obj-C selector from the sx method name and lowers to
`objc_msg_send` against the cached SEL slot (same intern path as
explicit `#objc_call`).
Default selector mangling (matches clang's keyword-method convention):
- Niladic (arity 0 excluding self): name verbatim. `length()` → "length".
- Arity ≥ 1: split the sx method name on `_`; each piece becomes a
keyword with a trailing `:`. `addObject(o)` → "addObject:";
`combine_and(a, b)` → "combine:and:";
`initWithFrame_options(f, o)` → "initWithFrame:options:".
Arity validation: keyword count (pieces from the `_`-split) must equal
call-site arity excluding self. Mismatch diagnoses at the call site
with a hint pointing at the forthcoming `#selector("...")` override
(Phase 3.2) for selectors that don't fit the underscore-split rule.
Mangling helper `deriveObjcSelector` and dispatch helper
`lowerObjcMethodCall` sit alongside `lowerForeignMethodCall`. The
existing fall-through diagnostic for non-JNI/non-Obj-C runtimes
remains for Swift (Phase 4 territory).
Tests `examples/ffi-objc-dsl-{01-niladic,02-one-arg,03-multi-keyword,
04-mismatch}.sx` snapshots flip from the pre-3.0 bail diagnostic
(exit=1) to working output (exit=0 for cases 01-03) and the specific
keyword-count mismatch diagnostic for case 04. Each test follows the
established pattern from `ffi-objc-call-08-multi-keyword.sx`:
synthesize a class at runtime via `objc_allocateClassPair` /
`class_addMethod`, declare a matching `#objc_class`, invoke the DSL
form. 163/163 tests; chess unaffected (JNI dispatch path untouched).
CLAUDE.md REJECTED PATTERNS forbids silent default returns where the
"reasonable-looking" value happens to match one common case (s64 = 8
bytes = pointer-sized on the host) and is silently wrong everywhere
else. `resolveType(null) → .s64` was exactly this shape: a top-level
`g_pi := 3.14;` was silently typed as `s64`, producing a wrong-typed
slot and the wrong runtime value.
`resolveType` now takes a non-optional `*const Node`. Twelve callers
were classified:
- Six were already guarded by `if (x.type_annotation != null)` blocks
— the null branch was unreachable. Cleaned up to optional-payload
syntax (`if (cd.type_annotation) |ta|`) so the always-non-null path
is obvious from the type.
- Two (`#objc_call` / `#jni_call` return types) pass `FfiIntrinsicCall.
return_type`, which is `*Node` (not optional) in the AST — the
silent fallback couldn't be reached there either.
- One (top-level `var_decl` at lower.zig:630) DID legitimately receive
null when the user omitted both annotation and initializer typing.
Now mirrors `lowerVarDecl`'s local-scope behavior: explicit
annotation → resolveType; no annotation → `inferExprType` from the
initializer; neither → diagnose with a real error message.
- One (`lowerComptimeGlobal`, fixed in commit 82e7b04 alongside
Phase 1.4) already infers from the comptime expression.
- Two (JNI super-call / JNI method return type) were already
hand-rolled with `if (rt) |t| resolveType(t) else .void`.
Regression at `examples/137-toplevel-var-type-inference.sx`: `g_count
:= 42;` / `g_pi := 3.14;` / `g_flag := true;` at module scope. Pre-fix
`g_pi` got silently typed as `s64` and printed `0` or garbage; now it
prints `3.140000`. 159/159 example tests + chess clean.
The Phase 1.4 serializer left a silent malformed-const case: when the
interp evaluated a `#run` returning a string (or anything with a fat
pointer inside), the data field came in as a `.int` holding a libc
host address. `LLVMConstInt(ptr_type, addr, 1)` happily emitted `i0 0`
in the static const, and the runtime segfaulted on the first read.
Phase 1.4a closes this for string and slice destinations. The signature
of `valueToLLVMConst` now takes the IR `TypeId` (instead of just the
LLVM type) and a borrowed `*Interpreter`. A new helper
`serializeAggregateValue` splits on the IR type:
- `string` / `slice` (fat pointer `{data, len}`): extract `len`, read
that many bytes from the data field's address (via `interp.heapSlice`
for `heap_ptr`, via a new `readHostBytes` for `byte_ptr` / `.int`,
via slice indexing for string literals). Emit the bytes as a private
global byte array using the existing `emitConstStringGlobal`. The
fat-pointer aggregate's data ptr resolves to the byte array's address.
- `struct`: walk the IR field types in lockstep with the value's
fields; recurse with each declared field TypeId. This replaces the
old LLVM-type-walk via `LLVMStructGetTypeAtIndex` which couldn't tell
string-typed fields from generic ptr fields.
- `array`: walk with the element TypeId.
The remaining `.int → ptr` trap (a host address landing in a bare ptr
field outside a fat pointer) now bails loudly with a named diagnostic
identifying it as Phase 1.4a heap-walk follow-up territory. No
practical trigger in-tree, so deferred.
`Interpreter.heapSlice` promoted from package-private to `pub` so
the serializer can read interp-managed heap data.
Regression: `examples/136-comptime-string-global.sx` —
`GREETING :: #run build_greeting();` where `build_greeting` returns
`concat("hello", " world")`. Runtime prints `greeting = 'hello world'`
and `greeting.len = 11`. Pre-1.4a this segfaulted on the first read.
158/158 example tests; chess clean on macOS / iOS sim / Android via
`tools/verify-step.sh`.
`xx <struct-typed local>` used to heap-copy the value through context.allocator.
The protocol value's `ctx` pointed at the heap copy; the original local was
left behind, untouched. Mutations through the protocol never reached the
original, and direct reads of the original never saw protocol mutations.
Two-fork bug, silent, easy to write by mistake.
New rule (Option 3 in the discussion):
- `xx <lvalue>` — identifier, field access, index expression, deref —
borrows the operand's storage. No heap copy, no `free` needed.
- `xx <rvalue>` — struct literal, function-call result, arithmetic, etc. —
heap-copies through context.allocator. Unchanged from today.
- `xx @ptr` and `xx <pointer-typed value>` — borrows the pointee. Unchanged.
Single switch in `buildProtocolErasure` ([lower.zig:10334](src/ir/lower.zig#L10334))
gated by a new `isLvalueExpr` helper ([lower.zig:10322](src/ir/lower.zig#L10322)).
Struct-typed operand: if the AST shape is identifier/field/index/deref,
emit `lowerExprAsPtr(operand_node)` and skip the heap-copy; otherwise
keep the alloca-store-heap_copy path.
specs.md §3 ownership table extended to three rows (rvalue, lvalue,
pointer) with examples and rationale per row.
Regressions:
- `examples/130-xx-value-routes-through-context-allocator.sx` — the
Phase 1.1 witness for heap-copy-via-context-allocator. Previous shape
(`xx <local-value>`) is now a borrow under Option 3 and no longer
exercises the heap-copy path. Rewritten to use a struct literal
(`xx ByValue.{...}`) which still heap-copies through context.allocator
— Tracer.count = 1 as before.
- `examples/135-xx-lvalue-borrows.sx` — new test. Dereferences a
TrackingAllocator into a stack value, does `xx tracker` inside a
push Context, and asserts alloc_count/dealloc_count on the LOCAL go
up. Under old semantics this would have stayed at 0 (heap copy got
the increments, local stayed stale).
157/157 example tests pass; chess clean on macOS / iOS sim / Android
(`tools/verify-step.sh` ran green immediately before this work).
`valueToLLVMConst` in emit_llvm previously handled int / float / boolean
and collapsed everything else into `LLVMConstNull(ty)`. A `#run` returning
a struct, string, function pointer, or anything aggregate produced a
zero-initialized global silently — the comptime result was computed by
the interp, then thrown away when emit_llvm couldn't represent it.
Replaced with a real walk:
- int / float / boolean — as before.
- null_val — `LLVMConstNull`.
- void_val / undef — `LLVMGetUndef`.
- func_ref — `func_map` lookup (already populated for the implicit-Context
static initializer of `__sx_default_context`).
- string — `emitConstStringGlobal`, returns a pointer to the byte array.
- aggregate — recurse field-by-field. Struct: walk
`LLVMStructGetTypeAtIndex` and emit `LLVMConstNamedStruct`. Array:
walk `LLVMGetElementType` and emit `LLVMConstArray2`.
The remaining variants (heap_ptr, byte_ptr, slot_ptr, closure, type_tag)
bail loudly with a `std.debug.print` carrying the global name — per
CLAUDE.md REJECTED PATTERNS, no more silent unimplemented arms. heap_ptr
serialization requires threading the IR `TypeId` so the heap content can
be walked recursively; deferred to Phase 1.4a alongside cycle detection.
The call site at emit_llvm.zig:676 now passes `global.name` so the
diagnostic locates the offending `#run` binding.
Type-inference fix at the binding site: `NAME :: #run expr;` with no
annotation used to default to `s64` via `resolveType(null) -> .s64`,
so even a successful Phase 1.4 serialization would emit `{0, 0}` —
the global's destination type was wrong. `lowerComptimeGlobal` now
calls `inferExprType(expr)` when no annotation is given, so the
inferred type matches the comptime function's return type. The
broader `resolveType(null)` fallback is left in place for other
callers — flagged in the MEM checkpoint as a follow-up audit.
Regression: `examples/134-comptime-aggregate-global.sx` exercises
`POINT :: #run make_point()` returning a `Point { x: s32, y: s32 }`.
Both interp (`sx run`) and codegen (`sx build`) now print
`POINT.x = 7 / POINT.y = 13` instead of `0 / 0`. 156/156 example
tests pass; chess unchanged.
The chess panel-text regression (text vanished after the first move on
macOS) had a single root cause: GlyphCache's entries List, hash table,
and shaped_buf grew through `context.allocator` — which during render
is the per-frame arena. On the next arena reset the backing died, and
subsequent glyph lookups read garbage / wrote into freshly-allocated
view-tree memory.
Fix is shaped as the user proposed: `List(T)`'s mutations take an
optional trailing `alloc: Allocator = context.allocator` argument. No
allocator stored on the container, no init ceremony, every existing
`list.append(item)` callsite keeps working unchanged. Long-lived
owners now write `list.append(item, self.parent_allocator)` and the
arena-leak bug becomes impossible to write accidentally.
Default-arg substitution previously only fired for identifier callees
(`expandCallDefaults` at lower.zig:7978). Extended to the generic
struct-method dispatch path (`list.append(...)` lands here) via a new
`appendDefaultArgs` helper that lowers fd.params[i].default_expr in
the caller's scope and appends to the lowered args slice.
Long-lived owners updated to capture `parent_allocator: Allocator` at
init and use it for every internal growth:
- GlyphCache (the chess bug) — entries, shaped_buf, hash_keys,
hash_vals, atlas bitmap.
- DockInteraction — drops the existing `push Context` workaround in
`ensure_capacity` for the explicit-arg form.
- StateStore — entries list + per-entry data buffer.
- Gles3Gpu, MetalGPU — shaders, buffers, textures (atlas-grow during
render would otherwise leak resources into the frame arena).
Also kept: an operator-precedence fix in pipeline.sx
(`(self.frame_index & 1) == 0` instead of
`self.frame_index & 1 == 0`, which parses as
`self.frame_index & (1 == 0)` = always 0). That was a stealth
single-arena-only bug that masked the GlyphCache one for a long time.
Docs:
- specs.md §11 documents `param: T = expr` default parameter values.
The parser already supported it — formalised in the spec now.
- current/CHECKPOINT-MEM.md logs the change.
- CLAUDE.md REJECTED PATTERNS gains a "Long-lived containers growing
through context.allocator" section with the `parent_allocator`
capture template and the list of existing examples to mirror.
155/155 example tests pass — zero-diff against snapshots since every
existing callsite still resolves to `context.allocator`.
allocViaContext used to fall back to a direct `.heap_alloc` (libc
malloc) when `Context` wasn't registered — i.e. when the program
didn't import std.sx. That was a silent escape hatch: a program could
appear to allocate fine without a `Context`, sidestepping protocol
dispatch entirely. Same shape as the matchContextAllocCall trap we
removed, just in a different code path.
Now: every site that needs `Context` emits a clear diagnostic when
the type isn't in scope, pointing the user at the required import.
- `allocViaContext`: the three fallback branches (no implicit_ctx, no
Context type, malformed Context struct) all call the new
`diagnoseMissingContext("heap allocation")` and return a
placeholder. Codegen no longer emits libc malloc as the silent
no-import path.
- `lowerPush`: the no-Context branches used to silently drop the
push and just lower the body. Now diagnose first, then lower
(keeping the body's other diagnostics flowing).
- `lowerIdentifier` for "context": used to silently fall through to
`global_names.get("context")` (which would emit an unresolved
identifier with no actionable hint). Now diagnose with the
required-import message.
With every consumer gone, the `.heap_alloc` and `.heap_free` IR ops
are deleted entirely:
- `inst.zig`: drop the Op variants.
- `interp.zig`: drop the execInst arms.
- `emit_llvm.zig`: drop the arms (the `getOrDeclareMalloc/Free`
helpers stay — they're still used by the foreign-decl path for
user-level `malloc`/`free` foreign bindings).
- `print.zig`: drop the printers + the isVoidOp arm.
- `emit_llvm.test.zig`: drop the unit test (op no longer exists).
155/155 example tests pass. Unit tests green. Chess green on macOS /
iOS sim / Android. A program that doesn't import std.sx and tries to
use `context.allocator.alloc` or `push Context.{}` or the `context`
identifier now gets a real error:
error: heap allocation requires the Context type — add
`#import "modules/std.sx";` (or a module that imports it)
Closes the last silent allocation-protocol escape.
The closure trampoline's env-buffer heap-copy in `lowerLambda` used to
call `.heap_alloc` directly (libc malloc, no protocol). Now it routes
through `allocViaContext` like every other compiler-internal alloc,
so a closure created inside `push Context.{ allocator = ... }` honors
the installed allocator — trackers count the env, arenas absorb it,
custom allocators see it. Closes the last `.heap_alloc` shortcut for
sx-internal allocations.
One ordering subtlety fixed alongside: the deferred restore of
`current_ctx_ref` at lowerLambda exit fired AFTER the env-and-closure
build section, so `allocViaContext` was reading `Ref.fromIndex(0)`
(the lambda's own ctx param, only valid inside the lambda body) when
emitting the alloc in the CALLER's scope. Without the explicit
restore, the env_heap dispatch silently routed through the default
context — the captured tracker never saw it. Fixed by restoring
`current_ctx_ref` right after `self.builder.func = saved_func`, before
the env build.
Regression test: `examples/133-closure-env-routes-through-context-allocator.sx`
mirrors the 130-xx-value pattern — install a Tracer via `push Context`,
create a capturing closure inside, assert `Tracer.count = 1`. Without
the fix the count is 0 (env goes through default context). Verified
by stashing the lower.zig change and re-running.
Bonus: `examples/50-smoke.sx` "closure-gpa" output flips from
`allocs=-1` to `allocs=0`. The old `-1` was the bug's signature —
the test manually `dealloc`'d the env after the closure ran, but the
GPA had never seen the matching alloc, so its counter went negative.
With Phase 1.3 the alloc/dealloc balance at 0. Snapshot regen.
155/155 example tests pass (133 new + 50-smoke regen). Chess green on
macOS / iOS sim / Android.
Apply the new CLAUDE.md "no silent unimplemented arms" rule to the
interp. Every `else => return error.CannotEvalComptime` and
`else => return val` (passthrough) gets a one-line `bailDetail` that
surfaces through `printInterpBailDiag` as
`op=X/X: <reason>` instead of a bare `CannotEvalComptime`.
Tightened sites:
- `.deref` else-arm used to return the operand unchanged for ANY
Value kind. Now: enumerated allow-list (`.aggregate`, `.string`
are legitimate pre-dereferenced values); scalars / handles / undef
/ null bail loudly. Previously, dereffing e.g. a `.boolean`
silently produced a bare `.boolean` and the caller treated it as
a successful deref.
- `.unbox_any` else-arm used to return the operand unchanged for any
non-aggregate. Now: enumerated bails for scalars / handles / void.
An unbox_any whose operand wasn't routed through `box_any` first
is a frontend bug and now shows up as one.
- `.compiler_call` for an unregistered hook silently returned
`CannotEvalComptime`. Now names the missing hook category in the
detail.
- `.length` / `.data_ptr` / `.subslice` / `.array_to_slice` /
`.global_addr` / `.call_indirect` / `struct_get` / `enum_tag` /
`enum_payload` / `unary -` / `field_name_get` / `field_value_get`
/ `objc_msg_send` / `jni_msg_send`: every `else` arm now carries
a specific reason.
- `evalArith` / `evalCmp` use `typeErrorDetail` so mismatched
operand pairs surface "neither both-int nor both-float-coercible"
instead of bare TypeError.
- `callForeign` distinguishes "dlsym error" vs "symbol not found"
vs "> 8 args" instead of returning the same error for all three.
- `execBuiltin` arms for ops the lowering shouldn't have emitted at
comptime (`.cast`, `.type_of`, `.alloc`, `.dealloc`) bail with a
reason instead of a bare error.
154/154 still passing. Behavioural change: the `.deref` /
`.unbox_any` arms used to silently produce a value for Value kinds
they shouldn't have accepted. Any consumer relying on that silent
fall-through now bails — which is the point.
The interp's `storeAtRawPtr` used to write 8 bytes from a `.int` /
`.float` Value regardless of the destination's declared width. The
Value tag flattens s8..s64/u*/pointer all to `.int`, so it can't
disambiguate widths on its own — every store risked clobbering up to
7 neighbor bytes if the actual IR type was sub-8.
Fix:
- `inst.Store` gains `val_ty: TypeId` (defaults to `.void` for
backward compat with the LLVM emitter, which doesn't read it).
- `builder.store` captures `getRefType(val)` at emit time.
- `storeAtRawPtr` now takes `val_ty`, looks up
`types.typeSizeBytes(val_ty)`, and writes exactly that many bytes:
`.int` → width bytes of the i64 representation (1..8),
`.float` → 4 (f32 round-trip via @floatCast) or 8,
`.boolean` → 1 (zeros higher width bytes when destination is wider),
`.null_val` → width bytes of zero. Width outside the expected band
bails with a clear diagnostic.
Regression test: `examples/132-comptime-typed-store-widths.sx`. For
every primitive type (u8/u16/u32/u64, s8/s16/s32/s64, bool, f32, f64),
the test:
1. Allocates a 32-byte libc buffer through `context.allocator`.
2. Fills with sentinel byte 0xAA.
3. Writes ONE typed value at offset 8.
4. Sums every byte back.
5. Compares the runtime checksum (LLVM-emitted store, already
correct) against a comptime checksum baked via `#run`.
Mismatch = neighbor clobber. The test exits non-zero with a per-width
"FAIL u8: comptime=X runtime=Y" line so future regressions surface
the offending width.
Also wired:
- Interp's `index_get` gains `.int` / `.byte_ptr` base arms — `buf[i]`
through a raw libc-malloc'd pointer reads one byte at offset i.
Used by the new test's `sum_bytes` loop; previously bailed at
`op=index_get`.
- `emit_llvm`'s comptime-init catch block prints a real diagnostic
instead of swallowing the error and filling the const with zero.
Stale bail state from a previous init is cleared before each call.
154/154 example tests pass (the new test + the existing 153). Chess
still green on macOS / iOS sim / Android.
Comptime fall-through paths used to surface as bare `CannotEvalComptime`
with no hint about the actual limitation. Now each raw-pointer Value
combination that isn't yet wired sets `Interpreter.last_bail_detail`
with a one-line explanation; `printInterpBailDiag` appends it after
the op tag:
error: post-link callback failed: CannotEvalComptime
(op=load/load: comptime load through raw host pointer not supported
(IR type width not threaded)) at .../bundle.sx:N:N
Sites covered: `.load` / `.store` / `.struct_gep` / `.deref` /
`.index_gep` arms for `.int`, `.byte_ptr`, `.heap_ptr` bases;
`storeAtRawPtr`'s catch-all (now exhaustively names every rejected
Value kind); foreign-arg marshalling of unsupported aggregate shapes.
Notable behaviour change: `.deref` through a raw pointer used to
silently return the pointer-as-int unchanged. That looked like a
successful deref to callers — now it errors loudly. Aggregate
passthrough (for `*string` / `*Closure` slot deref) is preserved.
The `storeAtRawPtr` `.int`/`.float` arms still assume 8-byte width —
the Store IR op doesn't carry val's TypeId. Documented inline at the
helper: real-world comptime stores hit 8-byte fields; smaller dests
would clobber. Threading val_ty into Store is left for when a
comptime path actually hits this.
153/153 still passing. The new diagnostics fire when a comptime path
goes through an unhandled shape — verified by reading the bail text
from a synthetic test (separate issue: `#run` silently drops the error
instead of surfacing the diagnostic to the user — out of scope here).
Comptime now runs the full Allocator-protocol dispatch chain — the
same IR codegen emits — instead of being short-circuited at lowering
by an AST pattern-match. `context.allocator.alloc(size)` flows
through the protocol thunk into `CAllocator.alloc → libc_malloc`,
returning a real host-libc pointer. The interp picks it up as a raw
`.int` Value and treats it as memory.
The pieces:
- `evalComptimeString` now uses the parent module instead of spinning
up a fresh ct_module. The parent already has every type, protocol,
impl, and thunk registered (Allocator, CAllocator, Context, the
GPA/Tracker thunks), so the dispatch chain runs without a separate
scan pass. The comptime function is appended to the parent module;
it's `is_comptime` so codegen skips it.
- Interp gains raw-pointer paths:
- `index_gep(.aggregate{.int data_ptr, .int len}, idx)` produces a
new `.byte_ptr` (a new Value variant) — byte-granular pointer that
`store` writes 1 byte through. Mirrors the existing heap_ptr
semantics for the same op shape.
- `index_gep(.int, idx)` returns `.int = p + idx` (byte-addressed).
- `store(.int_ptr, val)` writes val's bytes via `@ptrFromInt`.
Handles int (8B), float (8B), bool (1B), null_val (8B of zeros).
- `store(.byte_ptr, val)` writes a single byte.
- `marshalForeignArg` handles `.aggregate{.int data, .int len}` and
`.byte_ptr` — both copy bytes into a null-terminated tmp buffer
for the C-side call.
- `asString` reads `len` bytes from a `.int` data field via
`@ptrFromInt`.
- `resolveFieldLoad` / `resolveFieldStore` reject field-pointer
aggregates whose first field is a wide integer (would otherwise
mis-trigger on a struct stored on the stack with an int pointer
in field 0).
- `lowerFunction` / `lazyLowerFunction` / `synthesizeJniMainStub`
bind `current_ctx_ref = &__sx_default_context` for every
callconv(.c) sx entry — not just `isExportedEntryName`. The JNI
stubs need this so `context.X` in the body resolves through
current_ctx_ref now that the pattern-match is gone.
- `matchContextAllocCall` and its dispatch site are deleted.
11 JNI/ObjC `.ir` snapshots regen — the comptime function appended to
the parent module shifts string-pool indices. 153/153 example tests
pass, chess green on macOS / iOS sim / Android.
Audit of library + game found every C-side callback already follows
the callconv(.c) rule. The static check at the bare-fn-ref site catches
typed fn-pointer mismatches; the one remaining hole is `xx <sx_fn> : *void`
(used by e.g. `class_addMethod(_, _, xx my_imp, _)`). Tried to close
it by requiring callconv(.c) on any sx fn cast to *void, but
examples/50-smoke.sx legitimately stores a default-conv sx fn into a
*void slot when manually constructing a Closure value — that path
goes through the sx-side closure trampoline ABI, not C. The compiler
can't distinguish C-side vs sx-side from the cast alone.
Leaving the hole open and documenting why. The existing libraries
follow the convention manually; the typed-fn-ptr check covers
pthread_create / SDL callbacks / GL loader-style sites which is where
the real-world bugs landed.
Passing a default-conv sx function to a `callconv(.c)` fn-pointer slot
(e.g. pthread_create's start routine) used to silently mismatch ABIs:
the C-side caller didn't supply __sx_ctx, so the sx-side body read its
first user param as garbage. The bug surfaced as a SIGSEGV inside
ANativeWindow_setBuffersGeometry on Android during chess bringup.
Now the compiler rejects the coercion outright at the bare-fn name
lookup site:
error: call-convention mismatch: 'sx_handler' is declared with
default sx convention but the target type expects callconv(.c)
Also: `#foreign` declarations without an explicit `callconv` now default
to `.c` instead of `.default`. Every external C symbol is by definition
C-conv; the previous default silently typed `objc_msgSend` (et al.) as
default-conv, so the check would fire on the consumer side when the
user typed a fn-ptr as `callconv(.c)`. With the foreign-default fix,
the existing typed-msgSend casts in `std/objc.sx` and `gpu/metal.sx`
keep type-checking and the rule is "C-conv on both sides or neither."
Caught by the new check (fixed in the same commit):
- `ios_gl_proc` in `platform/uikit.sx` lacked callconv(.c) but was
passed to `load_gl` whose `get_proc` slot expects it.
- `ffi_apply_callback` / `ffi_apply_callback2` in
`examples/ffi-06-callback.sx` had default-conv fn-ptr params but
the C bodies (in the companion .c) are unambiguously C-conv.
Regression test: `examples/131-callconv-mismatch-diagnostic.sx`
locks in the diagnostic shape (sx-conv fn → callconv(.c) slot).
153/153 example tests pass. Chess green on macOS / iOS sim / Android.
Verify-step uncovered three categories of regressions where sx code
calls into the platform's C ABI through fn-pointer types or as a
registered callback. Every site now declares the right convention.
C-side calls INTO sx → callconv(.c) on the sx function:
- platform/android.sx: sx_android_render_thread_entry is the start
routine pthread_create invokes — pthread treats it as a C function.
Also annotate the pthread_create signature so the start-routine fn-
pointer field rejects mismatching sx fns at compile time.
sx code calling typed fn-pointers cast from C symbols → callconv(.c)
on the fn-pointer type:
- opengl.sx: 55 GL fn-ptr globals + load_gl's proc-loader param. GL
trampolines are macOS/iOS/Android system code.
- std/objc.sx: the two typed `objc_msgSend` casts.
- gpu/metal.sx: ~40 typed `objc_msgSend` casts across Metal command
encoder / device / pipeline construction.
The block invoke trampolines (objc_block.sx) call back INTO sx (the
closure trampoline). The typed fn-ptr there stays default-conv so
ctx prepends correctly. Compiler change: a callconv(.c) sx function
now binds `current_ctx_ref` to `&__sx_default_context` at entry (used
to be gated by `isExportedEntryName`). C-callable sx callbacks like
the block invokes don't get their own __sx_ctx param but their bodies
still need a real Context to forward to the closure they delegate to.
Tests: 152/152 example suite + chess green on all 3 platforms.
Screenshots at /tmp/sx-game-{macos,iossim,android}.png.
The `context : Context = ---;` global in `library/modules/std.sx` had
no remaining readers — all `context.X` lookups in user code resolve
through `current_ctx_ref` (Step 5), `push Context.{...}` uses an alloca
slot (Step 6), and `allocViaContext` sources from the lowering's
current ref. `emitDefaultContextInit` (the only writer) was already
removed in Step 5.
`inferExprType` for the `context` identifier now returns the registered
`Context` type when implicit-ctx is enabled, mirroring the lowering's
identifier-handling fast path. Without this, `context.allocator` would
type as `s64` (the fallback) and the field access would fail.
11 JNI/ObjC IR snapshots regen — the `@context` LLVM global is gone
from each.
152/152 example tests pass.
Step 5 — `context` resolves through `current_ctx_ref`. The compile-time
emit of the default GPA into the `context` global is gone; entry points
already bind `current_ctx_ref` to `&__sx_default_context` and every
sx-to-sx call forwards it. `allocViaContext` sources from
`current_ctx_ref` too. `matchContextAllocCall` is kept as a comptime
escape hatch: the ct_module spun up by `evalComptimeString` doesn't get
the full Allocator/CAllocator/Context type registration so the protocol-
dispatch chain wouldn't run in the interp; codegen also wins from the
direct libc malloc/free.
Step 6 — `push Context.{...}` stack-discipline rewrite. Allocates a
fresh `Context` slot, binds `current_ctx_ref` to it for the body's
lexical scope, restores on exit. No global, no walk.
Step 7 — interp parity. `defaultContextValue()` builds the Context
aggregate (CAllocator thunks for alloc/dealloc, null data) on demand.
`interp.call` bootstraps slot_ptr(0) when an entry function with
implicit ctx is called sans args; `materializeCtxArg` dereferences the
caller's slot_ptr into the aggregate at every sx-to-sx call boundary so
the callee's `load(ref_0)` lands on the value; `load` of an aggregate
is a passthrough. `.global_addr` of `__sx_default_context` returns the
aggregate directly so exported entries' first-line `global_addr(...)`
runs cleanly in `#run`.
`ct_lowering` inherits `implicit_ctx_enabled` + `has_implicit_ctx` so
functions lowered into the ct module carry ctx like their main-module
twins.
152/152 example tests pass. Snapshots regen.
Continues the implicit-Context refactor. Bare-fn trampolines, lambda
trampolines, and protocol thunks now carry __sx_ctx at slot 0; call
sites for closures, fn-pointer variables, and method dispatch prepend
the caller's current ctx.
- emit_llvm.zig:1687 call_indirect treats `fp_ctx_slots` leading args
as opaque ptr (the implicit ctx) when the fn-pointer is default-conv
under has_implicit_ctx.
- lower.zig:fnPtrTypeWantsCtx predicate gates the prepend at both
scope-local and global fn-pointer call sites.
- lower.zig:fixupMethodReceiver skips __sx_ctx when probing the
receiver param's type.
- lower.zig:lowerLambda builds closure type from user-visible params
only (skip ctx + env).
- lower.zig:closure(bare_fn) builds closure type from user-visible
params only.
- module.zig: Module.has_implicit_ctx flag mirrors Lowering's switch
so emit_llvm can read it without a back-pointer.
Tests updated:
- 5 ObjC-block/runtime tests get `callconv(.c)` on fn-ptr types
cast from `objc_msgSend` / Block.invoke (C-side calls into sx).
- ffi-06-callback gets `callconv(.c)` on double_it/add_with_ctx —
the registered C-side callbacks.
- 08-types snapshot regen (undefined-init drift from layout shift).
- 11 JNI/ObjC .ir snapshots regen for the ctx-prepended thunk
signatures.
151/152 example tests pass. Remaining failure (05-run) is the
comptime/interp path that requires Step 7 (callWithDefaultContext).
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.
Week 7 of /Users/agra/.claude/plans/lets-plan-to-move-splendid-pumpkin.md
plus the android.sx refactor + three sx-compiler fixes hit along the way
to get chess on Pixel 7 Pro responding to touch end-to-end.
library/modules/platform/bundle.sx now covers the Android APK shape
alongside macOS / iOS-sim / iOS-device. `android_bundle_main` discovers
the SDK ($ANDROID_HOME / $ANDROID_SDK_ROOT / $HOME/Library/Android/sdk),
picks the highest-versioned build-tools + platforms via
`process.run("ls .. | sort -V | tail -1")`, stages
`<apk>.stage/lib/arm64-v8a/<libfoo.so>`, synthesizes
AndroidManifest.xml (NativeActivity vs `#jni_main` Activity branch),
writes each `#jni_main` decl's Java source under
`<stage>/java/<pkg>/<Cls>.java`, runs javac --release 11 + d8 to
produce classes.dex, aapt2-links the unaligned APK, appends lib/ +
classes.dex + each registered asset tree via zip, zipalign + ensure
debug keystore via keytool + apksigner sign.
Compiler-side accessors (src/ir/compiler_hooks.zig + library/modules/compiler.sx):
- is_android predicate.
- set_manifest_path / manifest_path + set_keystore_path / keystore_path.
- jni_main_count / jni_main_foreign_path_at(i) /
jni_main_java_source_at(i) surface the `#jni_main` emissions that
the Zig createApk previously consumed directly.
- main.zig wires manifest_path, keystore_path, and the per-decl
(foreign_path, java_source) parallel slices into BuildConfig before
invoking the post-link callback.
CLI `--apk <path>` keeps working as a transitional alias: it now feeds
bundle_path so the existing auto-`post_link_module = "platform.bundle"`
shim fires the same way as `--bundle`. main.zig no longer calls
target.createApk directly.
Deletions in src/target.zig: createApk, compileJniMainSources,
buildJniMainManifest, buildAndroidManifest, ensureDebugKeystore,
libNameFromSoBasename, plus helpers splitForeignPath / discoverJavac /
discoverAndroidSdk / findHighestSubdir / runProcess / runProcessIn
(~400 lines). git grep returns only the obituary comment.
library/modules/platform/android.sx refactor (chess Android dependency):
- Module-level globals retired (g_app_window, g_egl_*, g_viewport_*,
g_dpi_scale, g_should_stop, g_render_thread*, g_user_main_fn,
g_touch_*) → AndroidPlatform struct fields.
- All sx_android_* helpers take `plat: *AndroidPlatform` as first arg.
Render thread receives plat via pthread_create's arg.
- New `logical_w: f32 = 0.0` field. Consumers set it before init() to
define the design width in points; `recompute_scale` derives
`dpi_scale = pixel_w / logical_w` (or 1.0 if unset). Called on
init / set_viewport / egl_init. drain_touches divides incoming
physical pixel coords by dpi_scale so chess sees logical-space
positions matching its layout. Touch lands on the right squares.
Three sx-compiler bugs hit + fixed along the way:
1. Top-level `inline if OS == .X { decls }` body decls were silently
dropped because scanDecls/lowerDecls had no .if_expr arm. New
`flattenComptimeConditionals` pre-pass in src/imports.zig
(threaded via ComptimeContext from core.zig) hoists matching arms
recursively. Regression at examples/124-inline-if-hoist-toplevel.sx.
2. Parser rejected `#import` / `#framework` inside inline-if bodies
because parseStmt in src/parser.zig only had arms for `#insert`.
Added the missing arms. Regression at
examples/123-inline-if-import-in-body.sx (landed earlier).
3. JNI `Call<T>Method` switches in src/ir/emit_llvm.zig (instance /
nonvirtual / static) were missing `.f32` rows — jfloat returns
(e.g. MotionEvent.getX/getY) fell into the silent-undef else arm.
Chess's sx_android_push_touch(plat, getAction(), getX(), getY())
delivered garbage f32 coords to the touch ring, so taps landed
nowhere recognisable. Added `.f32 => Jni.Call{Static,Nonvirtual,}FloatMethod`
rows to all three switches; lifted unsupported-type detection
from emit_llvm into lowerForeignMethodCall with proper
source-spanned diagnostics (`isJniReturnTypeSupported`). Regressions
at examples/ffi-jni-call-10-jfloat-return.sx,
examples/ffi-jni-class-09-multi-float-args.sx,
examples/ffi-jni-call-11-unsupported-return-diag.sx.
Stale-snapshot drift in tests/expected/ffi-objc-call-03-selector-sharing.ir
and ffi-objc-call-06-sret-return.ir picks up the new BuildOptions
accessor extern decls (is_android, set_manifest_path,
set_keystore_path, jni_main_count, jni_main_foreign_path_at,
jni_main_java_source_at). Verified diff is dead-decl-only.
Chess on Pixel 7 Pro: tap on e2 white pawn -> yellow selection +
green dots on legal e3/e4 targets; tap on e4 -> board updates with
1. e4, "Black to move" + "1. e4" in info panel.
zig build && zig build test && bash tests/run_examples.sh -> 145/145
green. bash tests/cross_compile.sh -> 7/7 green.
Campaign Weeks 3-6 of /Users/agra/.claude/plans/lets-plan-to-move-splendid-pumpkin.md
land in one push: the bundling pipeline that used to live in
src/target.zig (createBundle, embedFramework, extractEntitlements,
buildInfoPlist, codesign) now lives in
library/modules/platform/bundle.sx and runs in the IR interpreter
after target.link() returns.
New language-side surface:
- library/modules/fs.sx — POSIX libc bindings (open/read/write/close,
mkdir/unlink/rmdir, chmod, rename, access, basename/dirname). Variadic
open() lowers to C's varargs via the new args: ..T form. Direct libc
calls bypass *File method dispatch so they work from the post-link
IR interpreter.
- library/modules/process.sx — popen-based run(cmd) returning
ProcessResult{ exit_code, stdout }, plus env() and find_executable().
- library/modules/std.sx — xml_escape(s) and variadic path_join(parts).
- library/modules/compiler.sx — BuildOptions grows
set_post_link_callback / set_post_link_module / binary_path
accessors; bundle_path/bundle_id/codesign_identity/provisioning_profile
setters + accessors; per-target predicates is_macos/is_ios/
is_ios_device/is_ios_simulator + target_triple; framework_count /
framework_at(i) / framework_path_count / framework_path_at(i);
add_asset_dir(src, dest) + asset_dir_count / src_at / dest_at.
Compiler-side wiring:
- src/ir/compiler_hooks.zig — BuildConfig now carries post_link_callback_fn,
post_link_module, binary_path, bundle_*, target_triple,
target_frameworks, target_framework_paths, asset_dirs. Hook registry
exposes every accessor; getters return "" / 0 for unset fields so
bundle.sx can treat absent values uniformly.
- src/ir/host_ffi.zig (new) — dlsym(RTLD_DEFAULT) + arity-switched cdecl
trampolines so #foreign("c") declarations resolve through the host
libc during #run / post-link interpretation.
- src/ir/interp.zig — callForeign dispatch; build_config pointer
injection so accessor hooks see live state during re-entry.
- src/core.zig — keeps the IR module alive past generateCode; exposes
invokeByName / invokeByFuncId so main.zig can re-enter the
interpreter after linking.
- src/main.zig — wires bundle/codesign/provisioning CLI flags +
target_triple + framework lists into BuildConfig; invokes the
post-link callback (by FuncId or by <module>.bundle_main lookup) once
target.link() returns. When --bundle is set but no callback is
registered, auto-falls-back to post_link_module = "platform.bundle"
so the legacy --bundle CLI keeps working for any program that imports
modules/platform/bundle.sx.
Apple .app bundler (library/modules/platform/bundle.sx):
- Single bundle_main entry covers macOS, iOS simulator, iOS device.
Per-target Info.plist switch keys off is_ios()/is_ios_simulator() —
iOS emits UIDeviceFamily / LSRequiresIPhoneOS /
UIApplicationSceneManifest / DTPlatformName (iPhoneOS or
iPhoneSimulator); macOS emits the minimal CFBundle* set.
- iOS-only steps:
- Provisioning embed: fs.read_file + fs.write_file to
<bundle>/embedded.mobileprovision.
- Framework embed: recursive cp -R per -F search path into
<bundle>/Frameworks/<Name>.framework/ (until fs.sx grows list_dir).
- Entitlements extraction: four process.run calls (security cms -D,
plutil -extract Entitlements xml1, plutil -extract
ApplicationIdentifierPrefix.0, plutil -replace application-identifier)
resolving the wildcard <TEAM>.* -> <TEAM>.<bundle_id>.
- Real codesign with --entitlements when present.
- Asset dirs (add_asset_dir): recursive cp -R src/. into <bundle>/dest/.
Missing src is treated as "nothing to do" so projects can register
add_asset_dir("assets", "assets") unconditionally.
Parser:
- parseStmt() now accepts #import \"path\"; and #framework \"Name\"; as
statement-position tokens. Needed for top-level
inline if OS == .android { #import \"modules/platform/android.sx\"; }
blocks (issue-0042 flatten pass surfaces them); chess's
inline-if-with-#import was rejected at parse time before this fix.
Removals from src/target.zig:
- createBundle, embedFramework, extractEntitlements, buildInfoPlist,
codesign (~210 lines). main.zig no longer calls createBundle after
link(); the sx callback is the single entry point.
Tests / regression markers (all run under sx run host JIT):
- examples/115-post-link-callback.sx — callback registration round-trip.
- examples/116-fs-roundtrip.sx — fs.write_file -> fs.read_file -> exists.
- examples/117-process-roundtrip.sx — process.run + env + find_executable.
- examples/118-macos-bundle.sx — macOS .app via bundle_main callback.
- examples/119-interp-cast-ptr-cmp.sx — cast(T) val under interpreter.
- examples/120-interp-variadic-any.sx — variadic ..Any indexing in IR
interpreter.
- examples/121-ios-sim-bundle.sx — iOS-sim cross-compile + .app with
iOS-shaped Info.plist (added to tests/cross_compile.sh as the
ios-sim tuple).
- examples/122-ios-device-bundle.sx — iOS device cross-compile +
full codesign pipeline (provisioning embed + entitlements
extraction + --entitlements codesign). Manually verified end-to-end:
installed via xcrun devicectl device install app + launched
successfully on iPhone 17 Pro.
- examples/123-inline-if-import-in-body.sx — locks in the parser fix.
zig build && zig build test && bash tests/run_examples.sh => 141 passed,
0 failed; bash tests/cross_compile.sh => 7 passed, 0 failed.
Trailing `args: ..T` on a #foreign declaration now lowers to the C
calling convention's `...` instead of sx-side slice-packing. Drops
the per-arity #foreign-shim workaround for callers of variadic C
APIs (__android_log_print, printf-family, etc.). Closes issue-0043.
- IR: Function.is_variadic on inst.Function; declareFunction drops
the variadic param from the IR signature for foreign+variadic
decls.
- emit_llvm: LLVMFunctionType receives is_var_arg=1 when the flag
is set; call lowering passes extras through unchanged.
- Lowering: packVariadicCallArgs early-outs for foreign+variadic
(no slice-pack); new promoteCVariadicArgs applies C default
argument promotion (bool/s8/s16/u8/u16 -> s32, f32 -> f64) to
extras past the fixed param count.
- Test: examples/ffi-foreign-cvariadic.sx + .c exercise s64/f64/s32
returns through C va_arg over s32/f64/*u8 element types.
134 host + 6 cross tests pass on the WIP-less baseline.
Combined slice — gets chess rendering on a Pixel 7 Pro via the
`#jni_main` pipeline. Half-dozen jni_java_emit fixes plus the rebuilt
stdlib android module:
jni_java_emit:
- `#implements Alias;` body members render as Java `implements`
clauses on the class header (space-separated, registry-resolved).
- Drop the implicit `super.<method>(args)` call from the @Override
delegate — interface impls (SurfaceHolder.Callback) have no
super; user calls super explicitly from sx-side via
`super.method(args)` lowered to `CallNonvirtual<T>Method`.
- `static { System.loadLibrary("<libname>"); }` static init block,
lib name derived from the build's `-o` basename.
- `name: Type;` body items render as private Java fields.
- `$` (JNI nested-class shape) → `.` in Java source: e.g.
`android/view/SurfaceHolder$Callback` → `android.view.SurfaceHolder.Callback`.
- Non-void @Override bodies `return` the native delegate's result.
lower.zig:
- `super.method(args)` sugar inside a `#jni_main` (or any
sx-defined `#jni_class`) bodied method lowers to JNI
`CallNonvirtual<T>Method` with the parent class resolved via
`#extends` (default Activity).
- `Alias.new(args)` constructor sugar lowers to JNI
`FindClass + GetMethodID("<init>", sig) + NewObject`.
- `jniMapParamType` stops erasing pointer types so method dispatch
on foreign-class params (`holder.getSurface()`) resolves.
- synthesizeJniMainStub pushes the env arg onto the lexical
`#jni_env` stack so omitted-env `#jni_call` and `super.method`
sites see it.
target.zig:
- Manifest synthesised from `#jni_main` adds
`android:theme="@android:style/Theme.DeviceDefault.NoActionBar.Fullscreen"`
so sx apps own the whole window (no title strip, no status bar).
library/modules/platform/android.sx (NEW):
- Replaces the retired NativeActivity-based module under #jni_main.
- Foreign-class decls for Bundle / Context / Surface / SurfaceHolder
/ SurfaceView / MotionEvent / View / Activity / SurfaceHolderCallback /
AssetManagerJ.
- libandroid / EGL / pthread foreign C decls.
- Helpers consumers call from their Activity body:
`sx_android_forward_assets(env, ctx)`,
`sx_android_attach_window(env, holder)`,
`sx_android_detach_window()`,
`sx_android_set_viewport(w, h)`,
`sx_android_start_render_thread(main_fn)`,
`sx_android_push_touch(action, x, y)`.
- Render thread brings up EGL on the ANativeWindow then calls the
user-supplied entry fn pointer.
- `AndroidPlatform` struct + `impl Platform` (init / begin_frame /
end_frame / poll_events / safe_insets / keyboard / show_keyboard /
hide_keyboard / stop / shutdown / run_frame_loop).
End-to-end verified on a Pixel 7 Pro: chess APK builds via
`sx build --target android --apk ... --bundle-id ... -o ...`, installs
via `adb install -r`, launches and renders the chess board with all
pieces in starting position. No title strip, no flicker. Touch events
reach `sx_android_push_touch` and drain through `poll_events` (debug-
verified) — chess's pipeline-side hit-test routing + DPI-correct
sizing remain as follow-ups.
138 host / 8 cross / `zig build test` all green.
Adds the constructor-invocation arm of the foreign-class DSL:
`SurfaceView.new(ctx)` (where `SurfaceView` is a `#foreign #jni_class`
with `static new :: (ctx: *Context) -> *Self;`) lowers to
`FindClass(env, "android/view/SurfaceView") + GetMethodID(env, cls,
"<init>", "(args)V") + NewObject(env, cls, mid, args...)`. Returns
the fresh jobject.
- inst.zig: `JniMsgSend.is_constructor` flag + `parent_class_path`
re-purposed to carry the class being constructed (alongside its
existing nonvirtual-super-class use). Mutually exclusive with
`is_static` / `is_nonvirtual`.
- lower.zig: `lowerCall.field_access` arm now recognises
`Alias.method(args)` where `Alias` resolves in `foreign_class_map`
and the matching member is `static`. `new` routes to a new
`lowerForeignStaticCall` that derives a `(args)V` JNI descriptor
and emits a `JniMsgSend` with `is_constructor=true`. Non-`new`
static calls report a clear "use #jni_static_call" diagnostic
until that sugar lands.
- emit_llvm.zig: new `NewObject` vtable slot (28) + `emitJniConstructor`
helper expanding the FindClass+GetMethodID+NewObject chain. The
jni_msg_send arm short-circuits to it when `is_constructor` is set.
Smoke `ffi-jni-main-03-ctor.sx` exercises both this slice and the
previous super-dispatch slice in a single `onCreate` body: calls
`super.onCreate(b)` then constructs a `SurfaceView` with the Activity
as Context. IR shows the expected six-stage chain (FindClass+GetMethodID+
CallNonvirtual + FindClass+GetMethodID+NewObject); APK builds clean.
Naming caveat: the Java type `android.content.Context` clashes with
sx stdlib's `Context :: struct {...}` (heap-context). The smoke aliases
it `JContext` — future work could add a path-prefix or `as` rename
form on `#jni_class` to avoid the manual rename.
133 host / 6 cross / zig build test all green.
`#jni_class` body items of the form `name: Type;` were parsed into
`ForeignFieldDecl` but dropped by jni_java_emit. They now render as
private Java fields between the static init block and the @Override
delegates, using the same primitive / `*Foo` → fully-qualified-name
type mapping as method parameters.
Needed for the chess-on-Pixel `SxApp` Activity to hold its
`SurfaceView` reference: `view: SurfaceView;` → `private
android.view.SurfaceView view;`.
Inside a `#jni_main` (or any sx-defined `#jni_class`) bodied method,
`super.method(args)` lowers to JNI's nonvirtual dispatch against the
parent class resolved via `#extends` (default `android.app.Activity`).
- lower.zig: tracks `current_foreign_class` + `current_foreign_method`
around each `synthesizeJniMainStub` body; pushes the JNIEnv* arg
onto the lexical `#jni_env` stack so omitted-env JNI calls inside
the body see env without a wrapper. New `lowerSuperCall` handles
the `super.method(args)` receiver pattern: derives parent path,
reuses the enclosing method's signature when names match (the
common `super.<override>(args)` case), or looks up the method on
the parent class declared as `#foreign #jni_class`.
- inst.zig: `JniMsgSend` gains `is_nonvirtual: bool` and
`parent_class_path: ?[]const u8` — the dispatch tag + super class
foreign path. Mutually exclusive with `is_static`.
- emit_llvm.zig: new `CallNonvirtual<T>Method` vtable slots + a
fourth dispatch arm. Resolves the parent jclass via
`FindClass(env, parent_path)` (per-call; caching is follow-up),
then `GetMethodID(env, parent_cls, name, sig)`, then
`CallNonvirtual<T>Method(env, obj, parent_cls, mid, args...)`.
Disassembly on the smoke confirms the chain:
`ldr [env+0x30]` (FindClass) → `ldr [env+0x108]` (GetMethodID) →
`ldr [env+0x2d8]` (CallNonvirtualVoidMethod) with `(env, self,
parent_cls, mid, bundle)`.
132 host / 5 cross / zig build test all green. The slice unblocks
Activity lifecycle overrides (onCreate, onResume, onPause) calling
their required `super.<method>(args)` without raw `#jni_call`
boilerplate.
Required for Android to resolve the `Java_*` symbols R.3 synthesises:
without `System.loadLibrary(...)` running before the Activity calls its
first native method, JNI lookup fails with UnsatisfiedLinkError.
The lib name comes from the build's `-o` basename — `/tmp/libsxchess.so`
→ `sxchess` — derived in `Compilation.collectJniMainEmissions` and
threaded through new `jni_java_emit.Options.lib_name`. When `-o` is
unset (or doesn't match `lib*.so`), the emitter omits the static init
and the caller must arrange loading another way.
dex confirmation on the slice 2 smoke: `<clinit>` static constructor
appears alongside `<init>` and `sx_onCreate` — the bytecode invokes
`System.loadLibrary("sxjnimain")` matching `/tmp/libsxjnimain.so`.
131 host / 4 cross / zig build test all green.
The Java @Override no longer injects a `super.<method>(...)` call before
the native delegate. The user calls super from the sx-side body when
needed — via a forthcoming `super.method(args)` dispatch lowered to
`CallNonvirtual<Type>Method` on JNI classes.
Two reasons:
- Interface method impls (e.g. SurfaceHolder.Callback) have no super
to call. The previous emit produced javac-rejected code for those.
- Lifecycle overrides may want to skip super in some cases, or call
it with different args. The emitter can't second-guess intent.
User-space control of the dispatch keeps the emitter free of "is this
an interface method or a supertype override?" guesswork. The dex
shrinks by one virtual-method bytecode invocation per override.
Caveat: until the sx-side `super.method(args)` dispatch lands, Activity
lifecycle methods (onCreate, onResume, etc.) that mandate `super.<>`
will throw `SuperNotCalledException` at runtime if their bodies don't
do their own JNI dispatch. The slice 2 smoke still launches cleanly
because its onCreate body is empty.
131 host / 4 cross / zig build test all green.
`jni_java_emit` previously dropped `#implements` members on the floor.
They now compose into the Java class header — first one prefixed with
` implements `, subsequent ones comma-separated. Aliases resolve
through the class registry just like `#extends`: an unmapped alias
passes through verbatim (handy for built-in JVM interfaces like
`java.lang.Runnable` without declaring a `#jni_class` for them).
First building block of the chess-on-Pixel migration: the new Activity
needs `implements android.view.SurfaceHolder$Callback` to receive
surfaceCreated / surfaceChanged / surfaceDestroyed callbacks from the
SurfaceView it hosts.
Unit test locks in both the registry-resolved and pass-through paths.
131 host / zig build test green.
`checkRequiredEntryPoints` no longer accepts `android_main` as an
Android entry — `#jni_main #jni_class("...")` is now the sole accepted
path. The diagnostic walks the user through declaring an Activity +
Bundle foreign decl. `isExportedEntryName` drops `android_main` and
`ANativeActivity_onCreate` (both were for the legacy NativeActivity
glue path R.2 stopped linking by default).
Migrates the two cross-compile examples that previously carried an
`android_main` trampoline to a minimal `#jni_main #jni_class(...) { }`
stub:
- `examples/ffi-jni-call-02-void.sx` — tests `#jni_call(void)` lowering
- `examples/ffi-objc-call-10-os-gate.sx` — tests `inline if OS` gating
Both stubs are empty (no `onCreate` body) so they exercise the
entry-point check + R.3's JNI-symbol synthesis pass produces no
symbols. 131 host / 4 cross / zig build test all green.
`examples/99-android-egl-clear.sx` still uses `android_main` and the
AndroidPlatform/native_app_glue stack — its Android-target build now
fails the entry-point check. R.5 removes it along with the rest of
the legacy NativeActivity surface.
After lowering completes, a new pass walks `foreign_class_map` and, for
every bodied non-static method on a `#jni_main #jni_class("...")` decl,
synthesises a C-ABI exported function whose name follows JNI's name-
mangling convention:
`Java_<pkg-mangled>_<Class>_sx_1<method-mangled>`
(`/` → `_`, `_` → `_1`). Android's JNI runtime resolves `private native
sx_<method>(...)` declared in the bundled classes.dex via this symbol
without needing an explicit `JNI_OnLoad`/`RegisterNatives` — the
name-mangling fallback is enough.
Param ABI: `(env: *void, self: *void)` prepended (JNIEnv* + jobject
receiver), followed by the user-declared params with pointer types
type-erased to `*void`. The user's body is lowered through the normal
fn-body pipeline with `env`, `self`, and the user-named params bound in
scope. `isExportedEntryName` now also returns true for any name starting
with `Java_` so emit_llvm sets external linkage.
Verified end-to-end: `llvm-nm -D` on the slice 2 smoke .so shows
`Java_co_swipelab_sxjnimain_SxApp_sx_1onCreate` as an exported T
symbol. 131 host / 4 cross / zig build test all green.
Future work (R.3b territory): richer typing inside bodies so `*Self` /
`*Bundle` params support method dispatch through the foreign-class
slot interning. For now `self`/`b` are opaque `*void` jobjects in
scope — fine for stub bodies and `#jni_call`-driven dispatch.
