Robert Allan JamesandClaude Opus 5.5
27c430e0ca
- Kernel sf_realloc() is a real realloc (copy min(old,new) via new kmalloc_usable_size(), free old, NULL-on-0 frees). It allocated fresh and nothing else: every growth leaked, and vm_state_push()'s call-state stack lost every saved state past depth 8 (found here). - Shim realloc() copies min(old,new) (over-read when growing). - Defect 9: FC bucket growth no longer leaks or patches a copy; no sf_xrealloc() (freed a block the index still held on failure). - Defect 5: heat snapshot heap-sized (was heats[1024], truncating). - Defect 6: word refused whole when its metrics can't be allocated. - Defect 7: vm_cleanup() (both) frees metrics' inner arrays. - Defect 8: most-likely-next kept incrementally; no full id scan. - Probe (removed): realloc keeps contents, heap returns exactly; call stack depth 20 intact; all three ISAs. Churn criterion NOT met: ~7 KB retained per churned VM (quota slots/word rows -- K-4 re-measures); a post-churn CONSOLE-CMD refusal attributed to the quota leak, K-4 retests. - Standard sequence on amd64/aarch64/riscv64: hashes, G, ledger unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* kmalloc.h - Kernel heap allocator interface
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*/
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#ifndef STARKERNEL_KMALLOC_H
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#define STARKERNEL_KMALLOC_H
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#include <stddef.h>
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#include <stdint.h>
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typedef struct {
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uint64_t total_bytes;
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uint64_t used_bytes;
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uint64_t peak_bytes;
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uint64_t free_bytes;
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} kmalloc_stats_t;
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int kmalloc_init(uint64_t heap_size_bytes);
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int kmalloc_is_initialized(void);
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void *kmalloc(size_t size);
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void *kmalloc_aligned(size_t size, size_t align);
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void kfree(void *ptr);
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/* FABRIC-3.10.8 K-1: the size ptr was allocated with, or 0 if ptr isn't a
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* live allocation from this heap. */
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size_t kmalloc_usable_size(const void *ptr);
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kmalloc_stats_t kmalloc_get_stats(void);
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uintptr_t kmalloc_heap_base_addr(void);
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uintptr_t kmalloc_heap_end_addr(void);
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/* Debug/diagnostic probe -- free-list census (largest free block, count of
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free blocks, count of allocated blocks, total blocks). Kept as permanent
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infrastructure (FABRIC-3.md SXIII, 2026-09-10): a cheap O(n) walk over
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the free list, useful for any future heap-shape investigation, not just
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the one that introduced it. Not called anywhere in the normal boot path
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today -- callers add their own log_message() call sites when debugging. */
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void kmalloc_debug_census(size_t *out_largest_free, size_t *out_free_count,
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size_t *out_used_count, size_t *out_total_blocks);
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/* Same precedent as kmalloc_debug_census() above -- sum of free-block bytes
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and used-block bytes across the whole free list. The pairing of the two
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(block-count census + byte-sum census) is what let FABRIC-3.md SXIII tell
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real heap corruption apart from ordinary fragmentation: fragmentation
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grows free_count while total_free_bytes stays flat; corruption drops
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both together. */
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void kmalloc_debug_census_bytes(size_t *out_total_free_bytes, size_t *out_total_used_bytes);
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#endif /* STARKERNEL_KMALLOC_H */
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