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https://github.com/esphome/esphome.git
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6b67224286
Generated setup() is a single monolithic function whose stack frame scales super-linearly with config size. On a 5,943-line apollo build the frame reached 1,264 B at -Os; extrapolation onto larger configs (e.g. the 16k-line LVGL config in #15796) plausibly overflows the 8 KB loop task stack before safe_mode can increment its boot counter. Emit a ComponentMarker sentinel at the start of each component's to_code output, then have cpp_main_section wrap each component's block (and sub-splits of up to 50 statements within each block) in a noinline IIFE lambda. Each lambda's ENTRY frame is released on return, bounding peak stack to setup() frame + max chunk frame. Measured on apollo-r-pro-1-eth (esp32-s3, -Os): setup() frame 1264 B -> 160 B max chunk frame n/a -> 144 B peak setup stack 1264 B -> 304 B (-76%) total flash 792,471 B -> 791,995 B (-476 B) The brace-depth guard in _wrap_in_noinline_iifes ensures we never split between the RawStatement("{") / RawStatement("}") pair emitted by cg.with_local_variable() (currently only wifi), so scoped locals stay intact.
103 lines
2.0 KiB
Python
103 lines
2.0 KiB
Python
# Base file for all codegen-related imports
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# All integrations should have a line in the import section like this
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#
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# >>> import esphome.codegen as cg
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#
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# Integrations should specifically *NOT* import directly from the
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# other helper modules (cpp_generator etc) directly if they don't
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# want to break suddenly due to a rename (this file will get backports for features).
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# pylint: disable=unused-import
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from esphome.cpp_generator import ( # noqa: F401
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ArrayInitializer,
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ComponentMarker,
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Expression,
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FlashStringLiteral,
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LineComment,
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LogStringLiteral,
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MockObj,
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MockObjClass,
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Pvariable,
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RawExpression,
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RawStatement,
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Statement,
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StructInitializer,
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TemplateArguments,
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add,
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add_build_flag,
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add_build_unflag,
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add_define,
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add_global,
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add_library,
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add_platformio_option,
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get_variable,
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get_variable_with_full_id,
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is_template,
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new_Pvariable,
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new_variable,
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process_lambda,
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progmem_array,
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safe_exp,
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set_cpp_standard,
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statement,
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static_const_array,
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templatable,
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variable,
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with_local_variable,
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)
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from esphome.cpp_helpers import ( # noqa: F401
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build_registry_entry,
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build_registry_list,
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extract_registry_entry_config,
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gpio_pin_expression,
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past_safe_mode,
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register_component,
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register_parented,
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)
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from esphome.cpp_types import ( # noqa: F401
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NAN,
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App,
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Application,
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Component,
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ComponentPtr,
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Controller,
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EntityBase,
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EntityCategory,
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ESPTime,
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FixedVector,
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GPIOPin,
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InternalGPIOPin,
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JsonObject,
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JsonObjectConst,
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Parented,
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PollingComponent,
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StringRef,
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arduino_json_ns,
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bool_,
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const_char_ptr,
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double,
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esphome_ns,
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float_,
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global_ns,
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gpio_Flags,
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int8,
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int16,
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int32,
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int64,
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int_,
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nullptr,
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optional,
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size_t,
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std_ns,
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std_shared_ptr,
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std_span,
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std_string,
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std_string_ref,
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std_vector,
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uint8,
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uint16,
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uint32,
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uint64,
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void,
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)
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