fix(elc): eliminate OOM in --emit-header; add memory guard #47

Merged

will.anderson merged 3 commits from fix/elc-oom-checkout into dev

2026-05-08 16:16:04 +00:00

Author	SHA1	Message	Date
will.anderson	f5dcca0386	build: update dist/platform/elc with OOM fix and memory guard El SDK CI - dev / build-and-test (pull_request) Successful in 4m16s Details Rebuilt from fix/elc-oom-checkout: scan_fn_sigs_el() --emit-header path + el_mem_check() guard. Verified on checkout.el: all 3 sigs in .elh, clean exit under normal load, exit(1) on memory limit exceeded.	2026-05-08 08:23:07 -05:00
will.anderson	53e0b99d5f	fix(elc): add el_mem_check() memory guard — abort before OS OOM-kill Add el_mem_check() to el_runtime.c: reads ELC_MAX_MEM_MB (default 512), checks RSS via getrusage (macOS bytes / Linux KB normalised to MB), prints a clear diagnostic to stderr and exits(1) if exceeded. Wire it into two places: - compiler.el: upfront check at --emit-header entry point - codegen.el: per-function check in the streaming loop after each el_arena_pop, so runaway growth is caught at the earliest function boundary rather than after the machine is already dying.	2026-05-08 08:21:38 -05:00
will.anderson	5f9cad5908	fix(elc): eliminate OOM in --emit-header by using token-level signature scan The --emit-header path previously called parse() which builds the entire program AST in memory before writing the .elh file. For checkout.el (~491 lines with HTML template trees and deep BinOp string-concat chains), this exhausted memory before the header could be written. Fix: replace parse() + emit_header() with scan_fn_sigs_el() + emit_header_from_sigs(). The new path tokenises the source once, then walks the flat token list skipping over function bodies entirely — peak memory is O(tokens) instead of O(whole-program AST). New functions in parser.el: - scan_type_el: reads a type annotation and returns its El source string - scan_params_el: reads (name: Type, ...) and returns El params string - scan_fn_sigs_el: token-level scan that collects El-style fn signatures without building any expression AST nodes New function in compiler.el: - emit_header_from_sigs: writes .elh from scan_fn_sigs_el output Self-hosting check: elc compiled with new elc, diff of outputs is identical (zero difference). Smoke test: elc --emit-header checkout.el produces correct three-entry .elh (previously truncated at two entries due to mid-parse OOM).	2026-05-08 08:20:13 -05:00

Author

SHA1

Message

Date

will.anderson

f5dcca0386

build: update dist/platform/elc with OOM fix and memory guard

El SDK CI - dev / build-and-test (pull_request) Successful in 4m16s

Details

Rebuilt from fix/elc-oom-checkout: scan_fn_sigs_el() --emit-header path
+ el_mem_check() guard. Verified on checkout.el: all 3 sigs in .elh,
clean exit under normal load, exit(1) on memory limit exceeded.

2026-05-08 08:23:07 -05:00

will.anderson

53e0b99d5f

fix(elc): add el_mem_check() memory guard — abort before OS OOM-kill

Add el_mem_check() to el_runtime.c: reads ELC_MAX_MEM_MB (default 512),
checks RSS via getrusage (macOS bytes / Linux KB normalised to MB), prints
a clear diagnostic to stderr and exits(1) if exceeded.

Wire it into two places:
- compiler.el: upfront check at --emit-header entry point
- codegen.el: per-function check in the streaming loop after each
  el_arena_pop, so runaway growth is caught at the earliest function
  boundary rather than after the machine is already dying.

2026-05-08 08:21:38 -05:00

will.anderson

5f9cad5908

fix(elc): eliminate OOM in --emit-header by using token-level signature scan

The --emit-header path previously called parse() which builds the entire
program AST in memory before writing the .elh file. For checkout.el (~491
lines with HTML template trees and deep BinOp string-concat chains), this
exhausted memory before the header could be written.

Fix: replace parse() + emit_header() with scan_fn_sigs_el() +
emit_header_from_sigs(). The new path tokenises the source once, then
walks the flat token list skipping over function bodies entirely — peak
memory is O(tokens) instead of O(whole-program AST).

New functions in parser.el:
- scan_type_el: reads a type annotation and returns its El source string
- scan_params_el: reads (name: Type, ...) and returns El params string
- scan_fn_sigs_el: token-level scan that collects El-style fn signatures
  without building any expression AST nodes

New function in compiler.el:
- emit_header_from_sigs: writes .elh from scan_fn_sigs_el output

Self-hosting check: elc compiled with new elc, diff of outputs is
identical (zero difference).

Smoke test: elc --emit-header checkout.el produces correct three-entry
.elh (previously truncated at two entries due to mid-parse OOM).

2026-05-08 08:20:13 -05:00

fix(elc): eliminate OOM in --emit-header; add memory guard #47

3 Commits