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Parse Version-Specific Snapshot Headers

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pancake committed 2026-09-01 14:46:26 +02:00
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doc/dae-todo.md
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@@ -0,0 +1,37 @@
# DAE Gap Implementation TODO
This roadmap tracks the high-confidence Dart AOT format and restoration gaps
identified by comparing `third_party/dae` with r2flutter. IDs are stable so an
item can be selected by name in follow-up work.
Items are ordered by dependency: stream framing and codecs first, versioned
cluster layouts next, then metadata/value restoration and profile detection.
- [x] **R2F-DAE-001 — Parse version-specific snapshot headers**
- Read the profile-defined header field count and semantics.
- Preserve canonical-cluster and field-table fields where present.
- Commit: `Parse Version-Specific Snapshot Headers`
- [ ] **R2F-DAE-002 — Add versioned snapshot reference decoding**
- Use unsigned LEB128 references through Dart 2.17.
- Use the `ReadRefId` +128 encoding from Dart 2.18 onward.
- Commit: `Add Versioned Snapshot Reference Decoding`
- [ ] **R2F-DAE-003 — Handle versioned ObjectPool entry bits**
- Model low-seven-bit, swapped low-seven-bit, and modern bitfield eras.
- Commit: `Handle Versioned ObjectPool Entry Bits`
- [ ] **R2F-DAE-004 — Parse versioned Code cluster layouts**
- Profile Code reference counts, text-offset deltas, and leading refs.
- Commit: `Parse Versioned Code Cluster Layouts`
- [ ] **R2F-DAE-005 — Support Dart 3.13 single snapshots**
- Add hashes/CIDs and merged VM/isolate snapshot handling.
- Add the alternate symbols and 3.13 Class, Code, and Closure layouts.
- Commit: `Support Dart 3.13 Single Snapshots`
- [ ] **R2F-DAE-006 — Retain serialized class layout metadata**
- Keep class ID, library/super references, next-field offset, and bitmap.
- Commit: `Retain Serialized Class Layout Metadata`
- [ ] **R2F-DAE-007 — Retain snapshot object value graph**
- Preserve Instance, Array, Map, and Set values by object reference.
- Expose bounded recursive values through the object inspector.
- Commit: `Retain Snapshot Object Value Graph`
- [ ] **R2F-DAE-008 — Probe snapshot layouts for unknown hashes**
- Validate candidate layouts structurally instead of selecting the newest.
- Commit: `Probe Snapshot Layouts for Unknown Hashes`
doc/learn.md
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@@ -1367,3 +1367,17 @@ field declarations as `'@0x<offset>'ic+Class..field <type>` rather than an
`offset=0x<offset>` attribute (or a trailing `@` modifier). This keeps the
address separate from `ic+`'s metadata arguments and works for both script
emission and direct core-command application.
## Snapshot Header Fields Are Versioned Data
The clustered header after the feature string is not a stable five-value
tuple. Dart 2.10 writes four fields; 2.12-2.13 add a separate canonical-cluster
count; 2.14-2.15 carry a field-table length but no instruction-table data
offset; 2.16-2.17 write six fields; and 2.18+ use the modern five-field
`num_base_objects`, `num_objects`, `num_clusters`, `instructions_table_len`,
`instructions_table_rodata_offset` layout.
The parser must select the ordered header schema from the snapshot hash before
locating the first allocation cluster. Treating every header as the modern
five-field form consumes a cluster byte on 2.10, starts before the final header
field on 2.16-2.17, and mistakes the canonical-cluster count for the total on
2.12-2.13.
include/r2flutter/dart_offsets.h
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@@ -27,6 +27,7 @@ static const DartHashEntry dart_hash_entries[] = {
{ "41be3daaabd524b8aa7423bc24584957", 4 }, // Dart 3.12.0
{ "501ef5cbd64ca70b6b42672346af6a8a", 4 }, // Dart 2.19.0
{ "5191d02bb1d36a9f8609aa7495894e76", 4 }, // Dart 3.1.0
{ "5b97292b25f0a715613b7a28e0734f77", 8 }, // Dart 2.12.0
{ "6093345773c65683f60c20c8e62cbe4a", 8 }, // Dart 2.16.0
{ "617d044d9faa87a98c29f8aad5d2f220", 4 }, // Dart 3.0.3
{ "659a72e41e3276e882709901c27de33d", 8 }, // Dart 2.14.0
@@ -75,7 +76,7 @@ static const DartHashEntry dart_hash_entries[] = {
{ "fe53c4fdba846005b70514aec3840296", 8 }, // Dart 3.4.0
};
#define DART_HASH_ENTRIES_COUNT 61
#define DART_HASH_ENTRIES_COUNT 62
// Default offset arrays (identical across all known Dart versions)
#define DART_DEFAULT_EP_OFFSETS \
include/r2flutter/dart_version.h
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@@ -19,6 +19,16 @@ typedef enum {
DART_TAG_STYLE_OBJECT_HEADER = 2 // v3.4.3+ and known 2.18.2 exception
} DartTagStyle;
// Ordered fields following the snapshot feature string. The field count alone
// is insufficient because the meaning of the five-field layouts changed.
typedef enum {
DART_HEADER_STYLE_MODERN = 0, // nb, no, nc, itlen, itdata (2.18+)
DART_HEADER_STYLE_210, // nb, no, nc, field_table_len
DART_HEADER_STYLE_212, // nb, no, canonical_nc, nc, field_table_len
DART_HEADER_STYLE_214, // nb, no, nc, field_table_len, itlen
DART_HEADER_STYLE_216 // nb, no, nc, field_table_len, itlen, itdata
} DartHeaderStyle;
// How the Dart version/layout for a snapshot was determined. Reported so users
// can tell whether decoding rests on an exact match or a best-effort guess.
typedef enum {
@@ -39,6 +49,7 @@ typedef struct {
ut64 it_cap;
DartTagStyle tag_style;
int header_fields;
DartHeaderStyle header_style;
} DartVerLayout;
// Lookup Dart version from a snapshot hash (MD5)
offsets.json
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@@ -6,15 +6,15 @@
},
"profiles": {
"2.10.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_INT32", "header_fields": 4, "typed_data_internal_base": 108, "typed_data_internal_limit": 150, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "CLASS": 4, "PATCH_CLASS": 5, "FUNCTION": 6, "CLOSURE_DATA": 7, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 77, "CODE": 16, "OBJECT_POOL": 20, "PC_DESCRIPTORS": 21, "CODE_SOURCE_MAP": 22, "COMPRESSED_STACK_MAPS": 23, "EXCEPTION_HANDLERS": 25, "CONTEXT": 26, "CONTEXT_SCOPE": 27, "SINGLE_TARGET_CACHE": 29, "UNLINKED_CALL": 30, "MONOMORPHIC_SMIABLE_CALL": 31, "CALL_SITE_DATA": 32, "ICDATA": 33, "MEGAMORPHIC_CACHE": 34, "SUBTYPE_TEST_CACHE": 35, "LOADING_UNIT": 36, "LANGUAGE_ERROR": 39, "UNHANDLED_EXCEPTION": 40, "INSTANCE": 42, "LIBRARY_PREFIX": 43, "TYPE_ARGUMENTS": 44, "TYPE": 46, "TYPE_REF": 47, "TYPE_PARAMETER": 48, "CLOSURE": 49, "MINT": 53, "DOUBLE": 54, "FLOAT32X4": 57, "INT32X4": 58, "FLOAT64X2": 59, "TYPED_DATA": 61, "EXTERNAL_TYPED_DATA": 62, "TYPED_DATA_VIEW": 63, "CAPABILITY": 66, "RECEIVE_PORT": 67, "SEND_PORT": 68, "STACK_TRACE": 69, "REGEXP": 70, "WEAK_PROPERTY": 71, "FUTURE_OR": 74, "USER_TAG": 75, "TRANSFERABLE_TYPED_DATA": 76, "ARRAY": 78, "IMMUTABLE_ARRAY": 79, "GROWABLE_OBJECT_ARRAY": 56, "STRING": 80, "ONE_BYTE_STRING": 81, "TWO_BYTE_STRING": 82, "NUM_PREDEFINED_CIDS": 156}},
"2.12.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_INT32", "header_fields": 4, "typed_data_internal_base": 100, "typed_data_internal_limit": 142, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "CLASS": 4, "PATCH_CLASS": 5, "FUNCTION": 6, "CLOSURE_DATA": 7, "FFI_TRAMPOLINE_DATA": 8, "FIELD": 9, "SCRIPT": 10, "LIBRARY": 11, "NAMESPACE": 12, "KERNEL_PROGRAM_INFO": 13, "WEAK_SERIALIZATION_REFERENCE": 74, "CODE": 14, "OBJECT_POOL": 17, "PC_DESCRIPTORS": 18, "CODE_SOURCE_MAP": 19, "COMPRESSED_STACK_MAPS": 20, "EXCEPTION_HANDLERS": 22, "CONTEXT": 23, "CONTEXT_SCOPE": 24, "SINGLE_TARGET_CACHE": 25, "UNLINKED_CALL": 26, "MONOMORPHIC_SMIABLE_CALL": 27, "CALL_SITE_DATA": 28, "ICDATA": 29, "MEGAMORPHIC_CACHE": 30, "SUBTYPE_TEST_CACHE": 31, "LOADING_UNIT": 32, "LANGUAGE_ERROR": 35, "UNHANDLED_EXCEPTION": 36, "INSTANCE": 38, "LIBRARY_PREFIX": 39, "TYPE_ARGUMENTS": 40, "TYPE": 42, "FUNCTION_TYPE": 43, "TYPE_REF": 44, "TYPE_PARAMETER": 45, "CLOSURE": 46, "MINT": 50, "DOUBLE": 51, "FLOAT32X4": 54, "INT32X4": 55, "FLOAT64X2": 56, "TYPED_DATA": 58, "EXTERNAL_TYPED_DATA": 59, "TYPED_DATA_VIEW": 60, "CAPABILITY": 63, "RECEIVE_PORT": 64, "SEND_PORT": 65, "STACK_TRACE": 66, "REGEXP": 67, "WEAK_PROPERTY": 68, "FUTURE_OR": 71, "USER_TAG": 72, "TRANSFERABLE_TYPED_DATA": 73, "ARRAY": 75, "IMMUTABLE_ARRAY": 76, "GROWABLE_OBJECT_ARRAY": 53, "STRING": 77, "ONE_BYTE_STRING": 78, "TWO_BYTE_STRING": 79, "NUM_PREDEFINED_CIDS": 148}},
"2.12.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_INT32", "header_fields": 5, "typed_data_internal_base": 100, "typed_data_internal_limit": 142, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "CLASS": 4, "PATCH_CLASS": 5, "FUNCTION": 6, "CLOSURE_DATA": 7, "FFI_TRAMPOLINE_DATA": 8, "FIELD": 9, "SCRIPT": 10, "LIBRARY": 11, "NAMESPACE": 12, "KERNEL_PROGRAM_INFO": 13, "WEAK_SERIALIZATION_REFERENCE": 74, "CODE": 14, "OBJECT_POOL": 17, "PC_DESCRIPTORS": 18, "CODE_SOURCE_MAP": 19, "COMPRESSED_STACK_MAPS": 20, "EXCEPTION_HANDLERS": 22, "CONTEXT": 23, "CONTEXT_SCOPE": 24, "SINGLE_TARGET_CACHE": 25, "UNLINKED_CALL": 26, "MONOMORPHIC_SMIABLE_CALL": 27, "CALL_SITE_DATA": 28, "ICDATA": 29, "MEGAMORPHIC_CACHE": 30, "SUBTYPE_TEST_CACHE": 31, "LOADING_UNIT": 32, "LANGUAGE_ERROR": 35, "UNHANDLED_EXCEPTION": 36, "INSTANCE": 38, "LIBRARY_PREFIX": 39, "TYPE_ARGUMENTS": 40, "TYPE": 42, "FUNCTION_TYPE": 43, "TYPE_REF": 44, "TYPE_PARAMETER": 45, "CLOSURE": 46, "MINT": 50, "DOUBLE": 51, "FLOAT32X4": 54, "INT32X4": 55, "FLOAT64X2": 56, "TYPED_DATA": 58, "EXTERNAL_TYPED_DATA": 59, "TYPED_DATA_VIEW": 60, "CAPABILITY": 63, "RECEIVE_PORT": 64, "SEND_PORT": 65, "STACK_TRACE": 66, "REGEXP": 67, "WEAK_PROPERTY": 68, "FUTURE_OR": 71, "USER_TAG": 72, "TRANSFERABLE_TYPED_DATA": 73, "ARRAY": 75, "IMMUTABLE_ARRAY": 76, "GROWABLE_OBJECT_ARRAY": 53, "STRING": 77, "ONE_BYTE_STRING": 78, "TWO_BYTE_STRING": 79, "NUM_PREDEFINED_CIDS": 148}},
"2.13.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_INT32", "header_fields": 5, "typed_data_internal_base": 100, "typed_data_internal_limit": 142, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "CLASS": 4, "PATCH_CLASS": 5, "FUNCTION": 6, "CLOSURE_DATA": 7, "FFI_TRAMPOLINE_DATA": 8, "FIELD": 9, "SCRIPT": 10, "LIBRARY": 11, "NAMESPACE": 12, "KERNEL_PROGRAM_INFO": 13, "WEAK_SERIALIZATION_REFERENCE": 14, "CODE": 15, "OBJECT_POOL": 18, "PC_DESCRIPTORS": 19, "CODE_SOURCE_MAP": 20, "COMPRESSED_STACK_MAPS": 21, "EXCEPTION_HANDLERS": 23, "CONTEXT": 24, "CONTEXT_SCOPE": 25, "SINGLE_TARGET_CACHE": 26, "UNLINKED_CALL": 27, "MONOMORPHIC_SMIABLE_CALL": 28, "CALL_SITE_DATA": 29, "ICDATA": 30, "MEGAMORPHIC_CACHE": 31, "SUBTYPE_TEST_CACHE": 32, "LOADING_UNIT": 33, "LANGUAGE_ERROR": 36, "UNHANDLED_EXCEPTION": 37, "INSTANCE": 39, "LIBRARY_PREFIX": 40, "TYPE_ARGUMENTS": 41, "TYPE": 43, "FUNCTION_TYPE": 44, "TYPE_REF": 45, "TYPE_PARAMETER": 46, "CLOSURE": 47, "MINT": 51, "DOUBLE": 52, "FLOAT32X4": 55, "INT32X4": 56, "FLOAT64X2": 57, "TYPED_DATA": 59, "EXTERNAL_TYPED_DATA": 60, "TYPED_DATA_VIEW": 61, "CAPABILITY": 64, "RECEIVE_PORT": 65, "SEND_PORT": 66, "STACK_TRACE": 67, "REGEXP": 68, "WEAK_PROPERTY": 69, "FUTURE_OR": 72, "USER_TAG": 73, "TRANSFERABLE_TYPED_DATA": 74, "ARRAY": 75, "IMMUTABLE_ARRAY": 76, "GROWABLE_OBJECT_ARRAY": 54, "STRING": 77, "ONE_BYTE_STRING": 78, "TWO_BYTE_STRING": 79, "NUM_PREDEFINED_CIDS": 148}},
"2.14.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 104, "typed_data_internal_limit": 146, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "CLASS": 4, "PATCH_CLASS": 5, "FUNCTION": 6, "TYPE_PARAMETERS": 7, "CLOSURE_DATA": 8, "FFI_TRAMPOLINE_DATA": 9, "FIELD": 10, "SCRIPT": 11, "LIBRARY": 12, "NAMESPACE": 13, "KERNEL_PROGRAM_INFO": 14, "WEAK_SERIALIZATION_REFERENCE": 15, "CODE": 16, "OBJECT_POOL": 20, "PC_DESCRIPTORS": 21, "CODE_SOURCE_MAP": 22, "COMPRESSED_STACK_MAPS": 23, "EXCEPTION_HANDLERS": 25, "CONTEXT": 26, "CONTEXT_SCOPE": 27, "SENTINEL": 28, "SINGLE_TARGET_CACHE": 29, "UNLINKED_CALL": 30, "MONOMORPHIC_SMIABLE_CALL": 31, "CALL_SITE_DATA": 32, "ICDATA": 33, "MEGAMORPHIC_CACHE": 34, "SUBTYPE_TEST_CACHE": 35, "LOADING_UNIT": 36, "LANGUAGE_ERROR": 39, "UNHANDLED_EXCEPTION": 40, "INSTANCE": 42, "LIBRARY_PREFIX": 43, "TYPE_ARGUMENTS": 44, "TYPE": 46, "FUNCTION_TYPE": 47, "TYPE_REF": 48, "TYPE_PARAMETER": 49, "CLOSURE": 50, "MINT": 54, "DOUBLE": 55, "FLOAT32X4": 58, "INT32X4": 59, "FLOAT64X2": 60, "TYPED_DATA": 62, "EXTERNAL_TYPED_DATA": 63, "TYPED_DATA_VIEW": 64, "CAPABILITY": 67, "RECEIVE_PORT": 68, "SEND_PORT": 69, "STACK_TRACE": 70, "REGEXP": 71, "WEAK_PROPERTY": 72, "FUTURE_OR": 74, "USER_TAG": 75, "TRANSFERABLE_TYPED_DATA": 76, "ARRAY": 79, "IMMUTABLE_ARRAY": 80, "GROWABLE_OBJECT_ARRAY": 57, "STRING": 81, "ONE_BYTE_STRING": 82, "TWO_BYTE_STRING": 83, "NUM_PREDEFINED_CIDS": 152}},
"2.15.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 106, "typed_data_internal_limit": 148, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 48, "TYPE_REF": 49, "TYPE_PARAMETER": 50, "CLOSURE": 51, "MINT": 55, "DOUBLE": 56, "FLOAT32X4": 58, "INT32X4": 59, "FLOAT64X2": 60, "TYPED_DATA": 62, "EXTERNAL_TYPED_DATA": 63, "TYPED_DATA_VIEW": 64, "CAPABILITY": 67, "RECEIVE_PORT": 68, "SEND_PORT": 69, "STACK_TRACE": 70, "REGEXP": 71, "WEAK_PROPERTY": 72, "FUTURE_OR": 74, "USER_TAG": 75, "TRANSFERABLE_TYPED_DATA": 76, "ARRAY": 81, "IMMUTABLE_ARRAY": 82, "GROWABLE_OBJECT_ARRAY": 83, "STRING": 84, "ONE_BYTE_STRING": 85, "TWO_BYTE_STRING": 86, "NUM_PREDEFINED_CIDS": 154}},
"2.16.0": {"cws": 8, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 6, "typed_data_internal_base": 106, "typed_data_internal_limit": 148, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 48, "TYPE_REF": 49, "TYPE_PARAMETER": 50, "CLOSURE": 51, "MINT": 55, "DOUBLE": 56, "FLOAT32X4": 58, "INT32X4": 59, "FLOAT64X2": 60, "TYPED_DATA": 62, "EXTERNAL_TYPED_DATA": 63, "TYPED_DATA_VIEW": 64, "CAPABILITY": 67, "RECEIVE_PORT": 68, "SEND_PORT": 69, "STACK_TRACE": 70, "REGEXP": 71, "WEAK_PROPERTY": 72, "FUTURE_OR": 74, "USER_TAG": 75, "TRANSFERABLE_TYPED_DATA": 76, "ARRAY": 81, "IMMUTABLE_ARRAY": 82, "GROWABLE_OBJECT_ARRAY": 83, "STRING": 84, "ONE_BYTE_STRING": 85, "TWO_BYTE_STRING": 86, "NUM_PREDEFINED_CIDS": 154}},
"2.17.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 6, "typed_data_internal_base": 110, "typed_data_internal_limit": 152, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 52, "TYPE_REF": 53, "TYPE_PARAMETER": 54, "CLOSURE": 55, "MINT": 59, "DOUBLE": 60, "FLOAT32X4": 62, "INT32X4": 63, "FLOAT64X2": 64, "TYPED_DATA": 66, "EXTERNAL_TYPED_DATA": 67, "TYPED_DATA_VIEW": 68, "CAPABILITY": 71, "RECEIVE_PORT": 72, "SEND_PORT": 73, "STACK_TRACE": 74, "REGEXP": 75, "WEAK_PROPERTY": 76, "WEAK_REFERENCE": 77, "FUTURE_OR": 79, "USER_TAG": 80, "TRANSFERABLE_TYPED_DATA": 81, "ARRAY": 86, "IMMUTABLE_ARRAY": 87, "GROWABLE_OBJECT_ARRAY": 88, "STRING": 89, "ONE_BYTE_STRING": 90, "TWO_BYTE_STRING": 91, "NUM_PREDEFINED_CIDS": 158}},
"2.18.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 111, "typed_data_internal_limit": 153, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 52, "TYPE_REF": 53, "TYPE_PARAMETER": 54, "CLOSURE": 55, "MINT": 59, "DOUBLE": 60, "FLOAT32X4": 62, "INT32X4": 63, "FLOAT64X2": 64, "TYPED_DATA": 66, "EXTERNAL_TYPED_DATA": 67, "TYPED_DATA_VIEW": 68, "CAPABILITY": 71, "RECEIVE_PORT": 72, "SEND_PORT": 73, "STACK_TRACE": 74, "SUSPEND_STATE": 75, "REGEXP": 76, "WEAK_PROPERTY": 77, "WEAK_REFERENCE": 78, "FUTURE_OR": 80, "USER_TAG": 81, "TRANSFERABLE_TYPED_DATA": 82, "ARRAY": 87, "IMMUTABLE_ARRAY": 88, "GROWABLE_OBJECT_ARRAY": 89, "STRING": 90, "ONE_BYTE_STRING": 91, "TWO_BYTE_STRING": 92, "NUM_PREDEFINED_CIDS": 159}},
"2.18.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 111, "typed_data_internal_limit": 153, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 52, "TYPE_REF": 53, "TYPE_PARAMETER": 54, "CLOSURE": 55, "MINT": 59, "DOUBLE": 60, "FLOAT32X4": 62, "INT32X4": 63, "FLOAT64X2": 64, "TYPED_DATA": 66, "EXTERNAL_TYPED_DATA": 67, "TYPED_DATA_VIEW": 68, "CAPABILITY": 71, "RECEIVE_PORT": 72, "SEND_PORT": 73, "STACK_TRACE": 74, "SUSPEND_STATE": 75, "REGEXP": 76, "WEAK_PROPERTY": 77, "WEAK_REFERENCE": 78, "FUTURE_OR": 80, "USER_TAG": 81, "TRANSFERABLE_TYPED_DATA": 82, "MAP": 83, "CONST_MAP": 84, "SET": 85, "CONST_SET": 86, "ARRAY": 87, "IMMUTABLE_ARRAY": 88, "GROWABLE_OBJECT_ARRAY": 89, "STRING": 90, "ONE_BYTE_STRING": 91, "TWO_BYTE_STRING": 92, "NUM_PREDEFINED_CIDS": 159}},
"2.18.2": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "OBJECT_HEADER", "header_fields": 5, "typed_data_internal_base": 112, "typed_data_internal_limit": 168, "typed_data_stride": 4, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "WEAK_ARRAY": 17, "CODE": 18, "OBJECT_POOL": 23, "PC_DESCRIPTORS": 24, "CODE_SOURCE_MAP": 25, "COMPRESSED_STACK_MAPS": 26, "EXCEPTION_HANDLERS": 28, "CONTEXT": 29, "CONTEXT_SCOPE": 30, "SENTINEL": 31, "SINGLE_TARGET_CACHE": 32, "UNLINKED_CALL": 35, "MONOMORPHIC_SMIABLE_CALL": 33, "CALL_SITE_DATA": 34, "ICDATA": 36, "MEGAMORPHIC_CACHE": 37, "SUBTYPE_TEST_CACHE": 38, "LOADING_UNIT": 39, "LANGUAGE_ERROR": 42, "UNHANDLED_EXCEPTION": 43, "INSTANCE": 45, "LIBRARY_PREFIX": 46, "TYPE_ARGUMENTS": 47, "TYPE": 49, "FUNCTION_TYPE": 50, "RECORD_TYPE": 51, "TYPE_PARAMETER": 52, "CLOSURE": 57, "MINT": 61, "DOUBLE": 62, "FLOAT32X4": 64, "INT32X4": 65, "FLOAT64X2": 66, "RECORD": 67, "TYPED_DATA": 69, "EXTERNAL_TYPED_DATA": 70, "TYPED_DATA_VIEW": 71, "CAPABILITY": 74, "RECEIVE_PORT": 75, "SEND_PORT": 76, "STACK_TRACE": 77, "SUSPEND_STATE": 78, "REGEXP": 79, "WEAK_PROPERTY": 80, "WEAK_REFERENCE": 81, "FUTURE_OR": 83, "USER_TAG": 84, "TRANSFERABLE_TYPED_DATA": 85, "MAP": 86, "CONST_MAP": 87, "SET": 88, "CONST_SET": 89, "ARRAY": 90, "IMMUTABLE_ARRAY": 91, "GROWABLE_OBJECT_ARRAY": 92, "STRING": 93, "ONE_BYTE_STRING": 94, "TWO_BYTE_STRING": 95, "NUM_PREDEFINED_CIDS": 175}, "note": "Uses fallback CIDs from 3.9.2 for the in-tree Flutter engine snapshot; not standalone Dart SDK 2.18.2 CIDs."},
"2.18.3": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 111, "typed_data_internal_limit": 153, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 52, "TYPE_REF": 53, "TYPE_PARAMETER": 54, "CLOSURE": 55, "MINT": 59, "DOUBLE": 60, "FLOAT32X4": 62, "INT32X4": 63, "FLOAT64X2": 64, "TYPED_DATA": 66, "EXTERNAL_TYPED_DATA": 67, "TYPED_DATA_VIEW": 68, "CAPABILITY": 71, "RECEIVE_PORT": 72, "SEND_PORT": 73, "STACK_TRACE": 74, "SUSPEND_STATE": 75, "REGEXP": 76, "WEAK_PROPERTY": 77, "WEAK_REFERENCE": 78, "FUTURE_OR": 80, "USER_TAG": 81, "TRANSFERABLE_TYPED_DATA": 82, "ARRAY": 87, "IMMUTABLE_ARRAY": 88, "GROWABLE_OBJECT_ARRAY": 89, "STRING": 90, "ONE_BYTE_STRING": 91, "TWO_BYTE_STRING": 92, "NUM_PREDEFINED_CIDS": 159}},
"2.18.3": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 111, "typed_data_internal_limit": 153, "typed_data_stride": 3, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 52, "TYPE_REF": 53, "TYPE_PARAMETER": 54, "CLOSURE": 55, "MINT": 59, "DOUBLE": 60, "FLOAT32X4": 62, "INT32X4": 63, "FLOAT64X2": 64, "TYPED_DATA": 66, "EXTERNAL_TYPED_DATA": 67, "TYPED_DATA_VIEW": 68, "CAPABILITY": 71, "RECEIVE_PORT": 72, "SEND_PORT": 73, "STACK_TRACE": 74, "SUSPEND_STATE": 75, "REGEXP": 76, "WEAK_PROPERTY": 77, "WEAK_REFERENCE": 78, "FUTURE_OR": 80, "USER_TAG": 81, "TRANSFERABLE_TYPED_DATA": 82, "MAP": 83, "CONST_MAP": 84, "SET": 85, "CONST_SET": 86, "ARRAY": 87, "IMMUTABLE_ARRAY": 88, "GROWABLE_OBJECT_ARRAY": 89, "STRING": 90, "ONE_BYTE_STRING": 91, "TWO_BYTE_STRING": 92, "NUM_PREDEFINED_CIDS": 159}},
"2.19.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 113, "typed_data_internal_limit": 169, "typed_data_stride": 4, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "CODE": 17, "OBJECT_POOL": 21, "PC_DESCRIPTORS": 22, "CODE_SOURCE_MAP": 23, "COMPRESSED_STACK_MAPS": 24, "EXCEPTION_HANDLERS": 26, "CONTEXT": 27, "CONTEXT_SCOPE": 28, "SENTINEL": 29, "SINGLE_TARGET_CACHE": 30, "UNLINKED_CALL": 31, "MONOMORPHIC_SMIABLE_CALL": 32, "CALL_SITE_DATA": 33, "ICDATA": 34, "MEGAMORPHIC_CACHE": 35, "SUBTYPE_TEST_CACHE": 36, "LOADING_UNIT": 37, "LANGUAGE_ERROR": 40, "UNHANDLED_EXCEPTION": 41, "INSTANCE": 43, "LIBRARY_PREFIX": 44, "TYPE_ARGUMENTS": 45, "TYPE": 47, "FUNCTION_TYPE": 48, "RECORD_TYPE": 49, "TYPE_REF": 50, "TYPE_PARAMETER": 51, "CLOSURE": 56, "MINT": 60, "DOUBLE": 61, "FLOAT32X4": 63, "INT32X4": 64, "FLOAT64X2": 65, "RECORD": 66, "TYPED_DATA": 68, "EXTERNAL_TYPED_DATA": 69, "TYPED_DATA_VIEW": 70, "CAPABILITY": 73, "RECEIVE_PORT": 74, "SEND_PORT": 75, "STACK_TRACE": 76, "SUSPEND_STATE": 77, "REGEXP": 78, "WEAK_PROPERTY": 79, "WEAK_REFERENCE": 80, "FUTURE_OR": 82, "USER_TAG": 83, "TRANSFERABLE_TYPED_DATA": 84, "MAP": 85, "CONST_MAP": 86, "SET": 87, "CONST_SET": 88, "ARRAY": 89, "IMMUTABLE_ARRAY": 90, "GROWABLE_OBJECT_ARRAY": 91, "STRING": 92, "ONE_BYTE_STRING": 93, "TWO_BYTE_STRING": 94, "NUM_PREDEFINED_CIDS": 176}},
"3.0.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 114, "typed_data_internal_limit": 170, "typed_data_stride": 4, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "WEAK_ARRAY": 17, "CODE": 18, "OBJECT_POOL": 22, "PC_DESCRIPTORS": 23, "CODE_SOURCE_MAP": 24, "COMPRESSED_STACK_MAPS": 25, "EXCEPTION_HANDLERS": 27, "CONTEXT": 28, "CONTEXT_SCOPE": 29, "SENTINEL": 30, "SINGLE_TARGET_CACHE": 31, "UNLINKED_CALL": 32, "MONOMORPHIC_SMIABLE_CALL": 33, "CALL_SITE_DATA": 34, "ICDATA": 35, "MEGAMORPHIC_CACHE": 36, "SUBTYPE_TEST_CACHE": 37, "LOADING_UNIT": 38, "LANGUAGE_ERROR": 41, "UNHANDLED_EXCEPTION": 42, "INSTANCE": 44, "LIBRARY_PREFIX": 45, "TYPE_ARGUMENTS": 46, "TYPE": 48, "FUNCTION_TYPE": 49, "RECORD_TYPE": 50, "TYPE_REF": 51, "TYPE_PARAMETER": 52, "CLOSURE": 57, "MINT": 61, "DOUBLE": 62, "FLOAT32X4": 64, "INT32X4": 65, "FLOAT64X2": 66, "RECORD": 67, "TYPED_DATA": 69, "EXTERNAL_TYPED_DATA": 70, "TYPED_DATA_VIEW": 71, "CAPABILITY": 74, "RECEIVE_PORT": 75, "SEND_PORT": 76, "STACK_TRACE": 77, "SUSPEND_STATE": 78, "REGEXP": 79, "WEAK_PROPERTY": 80, "WEAK_REFERENCE": 81, "FUTURE_OR": 83, "USER_TAG": 84, "TRANSFERABLE_TYPED_DATA": 85, "MAP": 86, "CONST_MAP": 87, "SET": 88, "CONST_SET": 89, "ARRAY": 90, "IMMUTABLE_ARRAY": 91, "GROWABLE_OBJECT_ARRAY": 92, "STRING": 93, "ONE_BYTE_STRING": 94, "TWO_BYTE_STRING": 95, "NUM_PREDEFINED_CIDS": 177}},
"3.1.0": {"cws": 4, "heap_object_tag": 1, "max_alignment": 16, "it_cap": 20000, "tag_style": "CID_SHIFT1", "header_fields": 5, "typed_data_internal_base": 113, "typed_data_internal_limit": 169, "typed_data_stride": 4, "cids": {"ILLEGAL": 0, "NATIVE_POINTER": 1, "CLASS": 5, "PATCH_CLASS": 6, "FUNCTION": 7, "TYPE_PARAMETERS": 8, "CLOSURE_DATA": 9, "FFI_TRAMPOLINE_DATA": 10, "FIELD": 11, "SCRIPT": 12, "LIBRARY": 13, "NAMESPACE": 14, "KERNEL_PROGRAM_INFO": 15, "WEAK_SERIALIZATION_REFERENCE": 16, "WEAK_ARRAY": 17, "CODE": 18, "OBJECT_POOL": 22, "PC_DESCRIPTORS": 23, "CODE_SOURCE_MAP": 24, "COMPRESSED_STACK_MAPS": 25, "EXCEPTION_HANDLERS": 27, "CONTEXT": 28, "CONTEXT_SCOPE": 29, "SENTINEL": 30, "SINGLE_TARGET_CACHE": 31, "UNLINKED_CALL": 32, "MONOMORPHIC_SMIABLE_CALL": 33, "CALL_SITE_DATA": 34, "ICDATA": 35, "MEGAMORPHIC_CACHE": 36, "SUBTYPE_TEST_CACHE": 37, "LOADING_UNIT": 38, "LANGUAGE_ERROR": 41, "UNHANDLED_EXCEPTION": 42, "INSTANCE": 44, "LIBRARY_PREFIX": 45, "TYPE_ARGUMENTS": 46, "TYPE": 48, "FUNCTION_TYPE": 49, "RECORD_TYPE": 50, "TYPE_PARAMETER": 51, "CLOSURE": 56, "MINT": 60, "DOUBLE": 61, "FLOAT32X4": 63, "INT32X4": 64, "FLOAT64X2": 65, "RECORD": 66, "TYPED_DATA": 68, "EXTERNAL_TYPED_DATA": 69, "TYPED_DATA_VIEW": 70, "CAPABILITY": 73, "RECEIVE_PORT": 74, "SEND_PORT": 75, "STACK_TRACE": 76, "SUSPEND_STATE": 77, "REGEXP": 78, "WEAK_PROPERTY": 79, "WEAK_REFERENCE": 80, "FUTURE_OR": 82, "USER_TAG": 83, "TRANSFERABLE_TYPED_DATA": 84, "MAP": 85, "CONST_MAP": 86, "SET": 87, "CONST_SET": 88, "ARRAY": 89, "IMMUTABLE_ARRAY": 90, "GROWABLE_OBJECT_ARRAY": 91, "STRING": 92, "ONE_BYTE_STRING": 93, "TWO_BYTE_STRING": 94, "NUM_PREDEFINED_CIDS": 176}},
@@ -33,6 +33,7 @@
"hashes": {
"8ee4ef7a67df9845fba331734198a953": "2.10.0",
"d979fa911b038a8682e98cc8c8569261": "2.10.0",
"5b97292b25f0a715613b7a28e0734f77": "2.12.0",
"e036be9d5df68283e1a043e348fa7ff4": "2.12.0",
"0c7f1aa25fc597a7b3b9a19ed390afa1": "2.13.0",
"34f6eec64e9371856eaaa278ccf56538": "2.13.0",
scripts/update-dart-version
+31 -6
View File
@@ -52,6 +52,14 @@ TAG_STYLE_NAMES = {
"OBJECT_HEADER": "DART_TAG_STYLE_OBJECT_HEADER",
}
HEADER_STYLE_NAMES = {
"modern": "DART_HEADER_STYLE_MODERN",
"2.10": "DART_HEADER_STYLE_210",
"2.12": "DART_HEADER_STYLE_212",
"2.14": "DART_HEADER_STYLE_214",
"2.16": "DART_HEADER_STYLE_216",
}
TAG_STYLE_VALUES = {v: k for k, v in TAG_STYLE_NAMES.items()}
CID_KIND_TO_CLASS_NAME = [
@@ -555,7 +563,7 @@ def infer_profile_for_version(version):
tag_style = "CID_INT32"
if (2, 16) <= ver_tuple < (2, 18):
hdr = 6
elif ver_tuple >= (2, 13):
elif ver_tuple >= (2, 12):
hdr = 5
else:
hdr = 4
@@ -573,6 +581,19 @@ def infer_profile_for_version(version):
}
def header_style_for_version(version):
ver_tuple = parse_version(version)
if ver_tuple < (2, 12):
return HEADER_STYLE_NAMES["2.10"]
if ver_tuple < (2, 14):
return HEADER_STYLE_NAMES["2.12"]
if ver_tuple < (2, 16):
return HEADER_STYLE_NAMES["2.14"]
if ver_tuple < (2, 18):
return HEADER_STYLE_NAMES["2.16"]
return HEADER_STYLE_NAMES["modern"]
def profile_diff(existing, inferred):
diffs = []
for key in ("cws", "heap_object_tag", "max_alignment", "it_cap", "tag_style", "header_fields"):
@@ -686,10 +707,11 @@ def gen_profile_entries(offsets):
for ver in sorted(profiles.keys(), key=parse_version):
v = profiles[ver]
tag_name = TAG_STYLE_NAMES.get(v["tag_style"], "0")
header_style = header_style_for_version(ver)
lines.append(f'\t{{ "", "{ver}", {v["cws"]}, {v["heap_object_tag"]}, '
f'{v["max_alignment"]}, {v["it_cap"]}, {tag_name}, '
f'{v["header_fields"]} }}, // Dart {ver}')
lines.append("\t{ { 0 }, NULL, 0, 0, 0, 0, 0, 0 }")
f'{v["header_fields"]}, {header_style} }}, // Dart {ver}')
lines.append("\t{ { 0 }, NULL, 0, 0, 0, 0, 0, 0, 0 }")
lines.append("};")
return "\n".join(lines)
@@ -728,11 +750,14 @@ def gen_dart_offsets_h(offsets):
lines.append(f"#define DART_HASH_ENTRIES_COUNT {len(hashes)}")
lines.append("")
lines.append("// Default offset arrays (identical across all known Dart versions)")
lines.append(f"#define DART_DEFAULT_EP_OFFSETS {{ {', '.join(str(x) for x in ep)} }}")
lines.append("#define DART_DEFAULT_EP_OFFSETS \\")
lines.append(f"\t{{ {', '.join(str(x) for x in ep)} }}")
lines.append(f"#define DART_DEFAULT_EP_OFFSETS_COUNT {len(ep)}")
lines.append(f"#define DART_DEFAULT_OWNER_OFFSETS {{ {', '.join(str(x) for x in owner)} }}")
lines.append("#define DART_DEFAULT_OWNER_OFFSETS \\")
lines.append(f"\t{{ {', '.join(str(x) for x in owner)} }}")
lines.append(f"#define DART_DEFAULT_OWNER_OFFSETS_COUNT {len(owner)}")
lines.append(f"#define DART_DEFAULT_NAME_OFFSETS {{ {', '.join(str(x) for x in name)} }}")
lines.append("#define DART_DEFAULT_NAME_OFFSETS \\")
lines.append(f"\t{{ {', '.join(str(x) for x in name)} }}")
lines.append(f"#define DART_DEFAULT_NAME_OFFSETS_COUNT {len(name)}")
lines.append("")
lines.append("#endif // R2C_DART_OFFSETS_H")
src/lib/dart_pool_parse.c
+6
View File
@@ -783,6 +783,12 @@ static void dump_header_snapshot_json(DartCtx *ctx, PJ *pj, const char *label, u
pj_kn (pj, "base_objects", sh.nb);
pj_kn (pj, "objects", sh.no);
pj_kn (pj, "clusters_count", sh.nc);
if (sh.ncc) {
pj_kn (pj, "canonical_clusters_count", sh.ncc);
}
if (sh.field_table_len) {
pj_kn (pj, "field_table_len", sh.field_table_len);
}
pj_kn (pj, "it_length", sh.itlen);
pj_kn (pj, "it_data_off", sh.itdata);
pj_kn (pj, "cluster_start", sh.cluster_start);
src/lib/dart_pool_parse_priv.h
+3 -1
View File
@@ -62,6 +62,8 @@ typedef struct {
ut64 nb;
ut64 no;
ut64 nc;
ut64 ncc;
ut64 field_table_len;
ut64 itlen;
ut64 itdata;
ut64 cluster_start;
@@ -225,7 +227,7 @@ bool dart_read_unsigned_at(DartCtx *ctx, ut64 addr, ut64 *out_val, ut64 *out_nex
bool dart_read_unsigned_buf(const ut8 *buf, ut64 size, ut64 pos, ut64 *out_val, ut64 *out_next);
char *dart_utf16le_to_utf8(const ut8 *buf, ut64 size);
bool dart_snapshot_header_read(DartCtx *ctx, ut64 base, DartSnapshotHeader *out);
bool dart_snapshot_header_read_buf(const ut8 *buf, ut64 size, DartSnapshotHeader *out);
bool dart_snapshot_header_read_buf(const ut8 *buf, ut64 size, const DartVerLayout *layout, DartSnapshotHeader *out);
DartVerLayout *dart_ctx_init_layout(DartCtx *ctx, DartVerLayout *tmp);
void dart_ctx_fini_layout(DartCtx *ctx, DartVerLayout *owned);
int find_snapshots(DartCtx *ctx);
src/lib/dart_pool_snapshot.c
+87 -25
View File
@@ -140,6 +140,70 @@ char *dart_utf16le_to_utf8(const ut8 *buf, ut64 size) {
return out;
}
static const DartVerLayout *dart_snapshot_header_layout(DartCtx *ctx, const char *hash) {
if (ctx && ctx->layout) {
return ctx->layout;
}
if (ctx && R_STR_ISNOTEMPTY (ctx->dart_version_override)) {
const DartVerLayout *layout = dart_profile_from_version (ctx->dart_version_override);
if (layout) {
return layout;
}
}
const char *version = dart_version_from_hash (hash);
const DartVerLayout *layout = version? dart_profile_from_version (version): NULL;
return layout? layout: dart_newest_profile ();
}
static bool dart_snapshot_header_set_fields(DartSnapshotHeader *out, const DartVerLayout *layout, const ut64 *fields, int count) {
if (!out || !layout || !fields || count != layout->header_fields) {
return false;
}
switch (layout->header_style) {
case DART_HEADER_STYLE_210:
out->nb = fields[0];
out->no = fields[1];
out->nc = fields[2];
out->field_table_len = fields[3];
break;
case DART_HEADER_STYLE_212:
if (UT64_MAX - fields[2] < fields[3]) {
return false;
}
out->nb = fields[0];
out->no = fields[1];
out->ncc = fields[2];
out->nc = fields[2] + fields[3];
out->field_table_len = fields[4];
break;
case DART_HEADER_STYLE_214:
out->nb = fields[0];
out->no = fields[1];
out->nc = fields[2];
out->field_table_len = fields[3];
out->itlen = fields[4];
break;
case DART_HEADER_STYLE_216:
out->nb = fields[0];
out->no = fields[1];
out->nc = fields[2];
out->field_table_len = fields[3];
out->itlen = fields[4];
out->itdata = fields[5];
break;
case DART_HEADER_STYLE_MODERN:
out->nb = fields[0];
out->no = fields[1];
out->nc = fields[2];
out->itlen = fields[3];
out->itdata = fields[4];
break;
default:
return false;
}
return true;
}
bool dart_snapshot_header_read(DartCtx *ctx, ut64 base, DartSnapshotHeader *out) {
if (!ctx || !out) {
return false;
@@ -181,20 +245,18 @@ bool dart_snapshot_header_read(DartCtx *ctx, ut64 base, DartSnapshotHeader *out)
}
out->flags[tocopy] = '\0';
cursor += (ut64)scanned + 1;
const DartVerLayout *layout = dart_snapshot_header_layout (ctx, out->hash);
if (!layout || layout->header_fields < 4 || layout->header_fields > 6) {
return false;
}
ut64 next = cursor;
if (!dart_read_unsigned_at (ctx, next, &out->nb, &next)) {
return false;
ut64 fields[6] = { 0 };
for (int i = 0; i < layout->header_fields; i++) {
if (!dart_read_unsigned_at (ctx, next, &fields[i], &next)) {
return false;
}
}
if (!dart_read_unsigned_at (ctx, next, &out->no, &next)) {
return false;
}
if (!dart_read_unsigned_at (ctx, next, &out->nc, &next)) {
return false;
}
if (!dart_read_unsigned_at (ctx, next, &out->itlen, &next)) {
return false;
}
if (!dart_read_unsigned_at (ctx, next, &out->itdata, &next)) {
if (!dart_snapshot_header_set_fields (out, layout, fields, layout->header_fields)) {
return false;
}
out->cluster_start = next;
@@ -202,7 +264,7 @@ bool dart_snapshot_header_read(DartCtx *ctx, ut64 base, DartSnapshotHeader *out)
return true;
}
bool dart_snapshot_header_read_buf(const ut8 *buf, ut64 size, DartSnapshotHeader *out) {
bool dart_snapshot_header_read_buf(const ut8 *buf, ut64 size, const DartVerLayout *layout, DartSnapshotHeader *out) {
if (!buf || !out || size < DART_SNAPSHOT_FIXED_SIZE + DART_SNAPSHOT_HASH_SIZE + 1) {
return false;
}
@@ -236,20 +298,20 @@ bool dart_snapshot_header_read_buf(const ut8 *buf, ut64 size, DartSnapshotHeader
}
out->flags[tocopy] = '\0';
cursor += (ut64)scanned + 1;
if (!layout) {
layout = dart_snapshot_header_layout (NULL, out->hash);
}
if (!layout || layout->header_fields < 4 || layout->header_fields > 6) {
return false;
}
ut64 next = cursor;
if (!dart_read_unsigned_buf (buf, size, next, &out->nb, &next)) {
return false;
ut64 fields[6] = { 0 };
for (int i = 0; i < layout->header_fields; i++) {
if (!dart_read_unsigned_buf (buf, size, next, &fields[i], &next)) {
return false;
}
}
if (!dart_read_unsigned_buf (buf, size, next, &out->no, &next)) {
return false;
}
if (!dart_read_unsigned_buf (buf, size, next, &out->nc, &next)) {
return false;
}
if (!dart_read_unsigned_buf (buf, size, next, &out->itlen, &next)) {
return false;
}
if (!dart_read_unsigned_buf (buf, size, next, &out->itdata, &next)) {
if (!dart_snapshot_header_set_fields (out, layout, fields, layout->header_fields)) {
return false;
}
if (next >= out->total_len) {
src/lib/dart_pool_strings.c
+1 -1
View File
@@ -410,7 +410,7 @@ static void scan_packed_strings_from_snapshot(DartCtx *ctx, ut64 snapshot_base,
return;
}
DartSnapshotHeader hdr;
if (!dart_snapshot_header_read_buf (buf, total_len, &hdr)) {
if (!dart_snapshot_header_read_buf (buf, total_len, ctx->layout, &hdr)) {
free (buf);
return;
}
src/lib/dart_version.c
+26 -25
View File
@@ -45,6 +45,7 @@ static const struct {
{ "8ee4ef7a67df9845fba331734198a953", "2.10.0" },
{ "d979fa911b038a8682e98cc8c8569261", "2.10.0" },
// Dart 2.12.x
{ "5b97292b25f0a715613b7a28e0734f77", "2.12.0" },
{ "e036be9d5df68283e1a043e348fa7ff4", "2.12.0" },
// Dart 2.13.x
{ "0c7f1aa25fc597a7b3b9a19ed390afa1", "2.13.0" },
@@ -129,31 +130,31 @@ static const struct {
// Range-start version profiles. CID tables are generated in dart_cid.c.
static const DartVerLayout version_profiles[] = {
{ "", "2.10.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 4 }, // Dart 2.10.0
{ "", "2.12.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 4 }, // Dart 2.12.0
{ "", "2.13.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 5 }, // Dart 2.13.0
{ "", "2.14.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 2.14.0
{ "", "2.15.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 2.15.0
{ "", "2.16.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 6 }, // Dart 2.16.0
{ "", "2.17.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 6 }, // Dart 2.17.0
{ "", "2.18.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 2.18.0
{ "", "2.18.2", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 2.18.2
{ "", "2.18.3", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 2.18.3
{ "", "2.19.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 2.19.0
{ "", "3.0.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 3.0.0
{ "", "3.1.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 3.1.0
{ "", "3.2.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 3.2.0
{ "", "3.3.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5 }, // Dart 3.3.0
{ "", "3.4.0", 8, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.4.0
{ "", "3.5.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.5.0
{ "", "3.6.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.6.0
{ "", "3.7.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.7.0
{ "", "3.8.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.8.0
{ "", "3.9.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.9.0
{ "", "3.10.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.10.0
{ "", "3.11.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.11.0
{ "", "3.12.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5 }, // Dart 3.12.0
{ { 0 }, NULL, 0, 0, 0, 0, 0, 0 }
{ "", "2.10.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 4, DART_HEADER_STYLE_210 }, // Dart 2.10.0
{ "", "2.12.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 5, DART_HEADER_STYLE_212 }, // Dart 2.12.0
{ "", "2.13.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_INT32, 5, DART_HEADER_STYLE_212 }, // Dart 2.13.0
{ "", "2.14.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_214 }, // Dart 2.14.0
{ "", "2.15.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_214 }, // Dart 2.15.0
{ "", "2.16.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 6, DART_HEADER_STYLE_216 }, // Dart 2.16.0
{ "", "2.17.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 6, DART_HEADER_STYLE_216 }, // Dart 2.17.0
{ "", "2.18.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 2.18.0
{ "", "2.18.2", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 2.18.2
{ "", "2.18.3", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 2.18.3
{ "", "2.19.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 2.19.0
{ "", "3.0.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.0.0
{ "", "3.1.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.1.0
{ "", "3.2.0", 8, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.2.0
{ "", "3.3.0", 4, 1, 16, 20000, DART_TAG_STYLE_CID_SHIFT1, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.3.0
{ "", "3.4.0", 8, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.4.0
{ "", "3.5.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.5.0
{ "", "3.6.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.6.0
{ "", "3.7.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.7.0
{ "", "3.8.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.8.0
{ "", "3.9.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.9.0
{ "", "3.10.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.10.0
{ "", "3.11.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.11.0
{ "", "3.12.0", 4, 1, 16, 20000, DART_TAG_STYLE_OBJECT_HEADER, 5, DART_HEADER_STYLE_MODERN }, // Dart 3.12.0
{ { 0 }, NULL, 0, 0, 0, 0, 0, 0, 0 }
};
const char *dart_version_from_hash(const char *hash) {
test/db/cmd/header-versioned
+17
View File
@@ -0,0 +1,17 @@
NAME=version-specific-snapshot-headers
FILE=-
CMDS=<<EOF
!!python3 -c 'import sys; open(sys.argv[1], "wb").write(bytes.fromhex(sys.argv[2]))' /tmp/r2flutter-header-210.bin 50414421f5f5dcdc5a000000000000000300000000000000386565346566376136376466393834356662613333313733343139386139353370726f647563742061726d3634206e6f2d636f6d707265737365642d706f696e74657273008283818780
!!../bin/r2flutter -j -H /tmp/r2flutter-header-210.bin 2>/dev/null | python3 -c 'import json,sys; d=json.load(sys.stdin); c=d["cluster"]; print(d["dart_version"], c["clusters"], c["it_len"], c["it_off"], d["header_fields"])'
!!python3 -c 'import sys; open(sys.argv[1], "wb").write(bytes.fromhex(sys.argv[2]))' /tmp/r2flutter-header-212.bin 50414421f5f5dcdc5b000000000000000300000000000000356239373239326232356630613731353631336237613238653037333466373770726f647563742061726d3634206e6f2d636f6d707265737365642d706f696e7465727300828381828780
!!../bin/r2flutter -j -H /tmp/r2flutter-header-212.bin 2>/dev/null | python3 -c 'import json,sys; d=json.load(sys.stdin); c=d["cluster"]; print(d["dart_version"], c["clusters"], c["it_len"], c["it_off"], d["header_fields"])'
!!python3 -c 'import sys; open(sys.argv[1], "wb").write(bytes.fromhex(sys.argv[2]))' /tmp/r2flutter-header-217.bin 50414421f5f5dcdc5c000000000000000300000000000000313434316436623133623836323366613766626636313433336162656264333170726f647563742061726d3634206e6f2d636f6d707265737365642d706f696e746572730082838187858980
!!../bin/r2flutter -j -H /tmp/r2flutter-header-217.bin 2>/dev/null | python3 -c 'import json,sys; d=json.load(sys.stdin); c=d["cluster"]; print(d["dart_version"], c["clusters"], c["it_len"], c["it_off"], d["header_fields"])'
!!rm -f /tmp/r2flutter-header-210.bin /tmp/r2flutter-header-212.bin /tmp/r2flutter-header-217.bin
EOF
EXPECT=<<EOF
2.10.0 1 0 0 4
2.12.0 3 0 0 5
2.17.6 1 5 9 6
EOF
RUN