core: route the fatal exit(1) sites through ace_fatal(), behind ACESTEP_FATAL_THROWS - #110
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core: route the fatal exit(1) sites through ace_fatal(), behind ACESTEP_FATAL_THROWS#110erichchampion wants to merge 2 commits into
erichchampion wants to merge 2 commits into
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…EP_FATAL_THROWS ace_fatal() centralizes the engine's fatal exits: one function, one format, one place to change. By default it prints and exit(1)s exactly as the sites it replaces did, so the engine's behaviour is unchanged; building with -DACESTEP_FATAL_THROWS=ON makes it throw ace_fatal_error instead, so an embedder can catch a failed model load and show an error rather than dying. The flag is PUBLIC and build-wide (it gates the body of an inline function), the same way GGML_MAX_NAME is: defining it on only some targets is an ODR violation. It stays OFF by default and the CMakeLists says why: the model-store load path frees cleanly on a throw (LoadGuard, GgufCloser, transactional install -- all in this change), but a forward-time fatal still leaks, so the throwing mode is load-path only until that follow-up lands. Also fixes two latent bugs found on the way: GGUFModel's fd sentinel was 0, so a zeroed STFile closed stdin; and backend_release() crashed on a null backend. tests/test-ace-fatal.cpp covers the flag's both modes.
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Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe change adds configurable fatal exceptions, centralizes fatal reporting, introduces GGUF RAII cleanup, and guards ModelStore module ownership during failed loads. Tests cover formatted exceptions, stack unwinding, long messages, and generic catches. ChangesFatal error contract and validation
GGUF resource lifecycle
Fatal call-site migration
ModelStore ownership
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to This change adds an optional exception-based fatal-error mode while retaining default process-exit behavior, with cleanup protections for exception unwinding. No concrete unresolved merge risk is identified in the supplied evidence. Sequence Diagram(s)sequenceDiagram
participant ModelStore
participant ModuleLoader
participant GGUFModel
participant LoadGuard
ModelStore->>ModuleLoader: load module
ModuleLoader->>GGUFModel: load tensors
GGUFModel-->>ModuleLoader: throw ace_fatal_error
ModuleLoader->>LoadGuard: unwind partial module
LoadGuard-->>ModelStore: return nullptr
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@src/cond-enc.h`:
- Line 293: Add scope-guard RAII ownership for the graph contexts used by
cond_ggml_forward in src/cond-enc.h at lines 293-293, qwen3_forward in
src/qwen3-enc.h at lines 416-416, and qwen3_embed_lookup in src/qwen3-enc.h at
lines 472-472, ensuring each ggml_context is released during exception unwinding
before its fatal allocation path can throw; preserve the existing normal cleanup
behavior.
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📒 Files selected for processing (15)
CMakeLists.txtsrc/ace-fatal.hsrc/backend.hsrc/cond-enc.hsrc/dit.hsrc/fsq-detok.hsrc/fsq-tok.hsrc/gguf-weights.hsrc/model-store.cppsrc/qwen3-enc.hsrc/qwen3-lm.hsrc/vae-enc.hsrc/vae.htests/CMakeLists.txttests/test-ace-fatal.cpp
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… review) When ACESTEP_FATAL_THROWS is enabled, ace_fatal throws ace_fatal_error instead of exit(1). The three forward functions allocate a ggml_context with ggml_init and previously freed it with an explicit ggml_free at the end. If ggml_backend_sched_alloc_graph fails, ace_fatal now throws BEFORE that free, leaking the context on each failure. Own the context with a function-local RAII guard so it is released during exception unwinding, preserving the normal cleanup behavior. Addresses review comment on src/cond-enc.h:293, src/qwen3-enc.h:416,472.
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Second of four small embedder patches from Cadenza (independent of the other three).
What it does
ace_fatal()centralizes the engine's fatal exits: one function, one format, one place to change. The engine has 27fprintf(stderr, ... FATAL ...); exit(1);sites scattered across loaders, backends and pipelines; they all become one call.ACESTEP_FATAL_THROWSoff (the default),ace_fatalprints andexit(1)s exactly as the sites it replaces did. This is a refactor, not a behaviour change.-DACESTEP_FATAL_THROWS=ON,ace_fatalthrowsace_fatal_errorinstead, so an app can catch a failed model load and show an error dialog rather than dying. A GUI embedding acestep-core cannotexit(1)from the middle of a click handler.The flag is PUBLIC and build-wide (it gates the body of an inline function), the same way
GGML_MAX_NAMEis: defining it on only some targets is an ODR violation. It stays OFF by default and the CMakeLists says why: the model-store load path frees cleanly on a throw (LoadGuard, GgufCloser, transactional install -- all in this change), but a forward-time fatal still leaks, so the throwing mode is load-path only until that follow-up lands.Also fixes two latent bugs found on the way:
GGUFModel's fd sentinel was 0, so a zeroed STFile closed stdin; andbackend_release()crashed on a null backend.Testing
tests/test-ace-fatal.cppexercises the throwing build: the error carries the formatted message and exit code, stack unwinding runs destructors (nothing leaks), and messages longer than the on-stack buffer are reproduced in full. The default path is exercised by the whole existing build; both configurations compile clean on macOS/arm64/Metal.Summary by CodeRabbit
New Features
Bug Fixes
Tests