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arm64, llvm and the region-interpreter rdrop path now watch the two
prologue words the way the x86-64 jit already did, so icon.replace_function's
lit+jmp patch retires a compiled callee (and clears fn_nat) instead of leaving
a stale stub. three new icon regressions: repeated o3 replace, failed
publication keeps the old entry, and a direct call after warming the region.
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Restoring undirtied lafacts when the body might free was wrong: push can
grow an array without dirtying its name, so a[99] after push warned against
a stale length 0. Keep the old lafact_keep rule; reorder explain_prover so
the constant/affine cases run before the touch() loops.
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Rebased the prover WIP onto main. lafact_keep restores undirtied allocation
facts even when the loop body might free (so a later touch() no longer drops
every length fact). proven_p uses ptr_still so an outer call keeps the check.
entry_fact still supplies the size for the "might free" explain reason.
bounds_prover.zc and explain_prover.zc land with test.sh coverage.
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affine i*n+k); unbuilt and untested
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Constant-size typed new inside o3 now calls rt.new_k instead of always
taking new_t/new_raw. new_k and recycle_leaf skip the o3 argument-fatten
path the way free/recycle already do. trees o3 new/free on the x86-64
jit dropped from about 4.1 ms to about 2.7 ms per iter (matches plain).
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Port arm64's rcall/rfinish to the x86-64 region jit: call the callee's entry
stub through fn_nat with a built frame, return via linkstk, and fall back to
o3_invoke when the stub is missing or the frame/depth check fails. Clear
fn_nat on rforget and cover the function prologue so icon.replace_function
drops the region (o3_caller_replace). vm_until saves jit_depth around nested
bytecode, matching arm64.
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replies and closes the endpoint; the handler reaches the struct through endpoint.state so the struct isn't shared; spawn hint skips mailbox structs
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owned std.File (or null) with write and read, and its drop closes the descriptor; Host.writefile is built on it; file_drop.zc, learn and readme
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drop capturing its own value), one per collection, each once; before, each waited for the other forever; spec 6.15.3, drop_gc_cycle.zc, drop_gc_self_capture.zc, design doc lists what landed
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enters and leaves the region and fattens its result, like a direct call; spec 4.10.3, o3_receiver_method_enter.zc
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block they leave (the loop records the o3 depth it began at), so the depth returns to 0 and pending collections and drops run; spec 4.10.3, o3_break_continue_leave.zc
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4.11, readme, memdebug_report_drop.zc
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it too, on x.spawn() of a mailbox struct for each live owned local with a drop; spec 6.15.4, lsp hint check
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a drop, or on an array field of a value with a drop, is error: a: can't move out of a value with drop (fields were already borrowed projections); spec 6.15.5, four conformance programs
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value first, running its drop (right side first, then the free, then the store), with hint: x: reassigning frees the old value; a new value that is part of the old one is an error; u, d and captured owners keep the leak error; the new value's size, leaf type and drop are recorded like a declaration's; spec 6.8.5, 6.15.2
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left); the map constants in rt.zc and the README table move by 0x8000; gc.zc's reclaim bound is 900 (937 with the heap higher, 952 before) and the run-only section rewrites whatever its number
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of the source before it end there: a program joined to the unbounded runtime in a self-hosted run-only image is bounds-checked again (since d55b5fd its index errors went unreported); runtime_image_test expects the trap's exit status 2; spec 4.15.1, 4.x unchecked, 5.15.3
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compiler reads mentions actors (test.sh check)
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the clearing out of line
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methods, collector drops after the sweep (once, resurrection), freed blocks forget their drop, temporaries drop at statement end with a hint, actor send check; o3: no collection inside a region (pending until the outermost exit), no drops set or ended inside o3; spec 3.11.6, 4.10.3-4, 6.15
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not just an expression or a block
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words, same behaviour)
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of heap, bad pointer, use after free); compile errors stay 1; spec 8.1.3; exitstatus.sh checks exit 2
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capture_scan in the body scanner
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compiled only in that mode; the genome keeps the call sites and a hook
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--explain-checks v1 (non-o3 code)
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of p[-4]
the bnd recipe and paylen read n instead of the power-of-two block:
bnd: r6 = sub p 3; r6 = ld r6; r7 = xor p 0x2B7E1516; r6 = eq r6 r7;
r7 = sub p 4; r7 = ld r7; r7 = shr r7 32; r7 = mul r7 q;
r8 = mul i m; r8 = ltu r8 r7; r8 = xor r8 1; r0 = and r6 r8
paylen: return p[-4] >> 32
two loads instead of three; osize, bchk, release, recycle and the memdebug
leak report all read n (rt.new(4) has length 4, rt.new(0) has 0).
writers: new_raw and new_k set n; stack.h line 87 and tinyvm.ts (BigInt) set
it on stack segments. release clears n when a block goes into quarantine
(len 0, indexing traps; under memdebug bchk reports a use after free); every
free-list path (fpush, mkblock, bdrop, recycle_leaf, balloc hold) rewrites
the word as k << 16, and an array that grows gets a fresh block. a request over
2^31-1-HDR words stops in new_raw (oom), and the compiler only takes the
new_k fast path for constant sizes that fit, so n is never truncated.
bit users checked (all mask or preserve bits 32..62; none compares or copies
the whole word): gc mark and sweep; release, free, recycle, recycle_leaf;
share and own; isobj, quar, checkptr, obj_base; bclass and the bfree buddy
merge; balloc, mkblock, fpush, funlink, heap_grow; frame_grow; stack_allocate
in src/core/stack.h and src/js/tinyvm.ts; micro.c and core.c (check word
only); the compiler's two p[-4] | F_INTERNAL writes (base.zc, builtins.zc).
32-bit ports: none (baremetal, wasm and micro use int64 Cell).
tests: tests/programs/exactsize.zc (n-1/n for non-power-of-two sizes, new(0),
packed bytes, recycle, grow, stack growth); 8-runtime: exact_size_bounds,
pointer_index_n_minus_1, pointer_index_n_traps, pointer_index_n_traps_memdebug,
new_zero_index_traps, new_too_big_traps, stale_index_after_free_traps,
stale_index_after_free_memdebug. expectations changed: leak report shows n
(tests/test.sh line 169, examples/learn/13-memdebug.out, docs/LEARN.md,
4-statements/memdebug_report_line.zc). programs adjusted to keep test.sh
expectations: quarantine.zc (unbounded), bounds_heap.zc (rt.new(11)).
spec 3.7.4 and 4.11 updated. fixpoint 402204 words (main 402197).
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the run
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registers); ZYO3INTERP=1 keeps the region interpreter
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code); test in tests/test.sh
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(spec 1.6.3); redone from zc-spec's 2f2597b
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return type check still fires (fixes typeerrors/ret.zc after b.2.6)
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(appendix b.2.11)
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name it (appendix b.2.2)
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specialization, ZYNOENH=1 to call xrun); enh_ops test; jit_x64_test in test.sh
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zinc
