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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_RAW_OBJECT_H_ | 5 #ifndef VM_RAW_OBJECT_H_ |
6 #define VM_RAW_OBJECT_H_ | 6 #define VM_RAW_OBJECT_H_ |
7 | 7 |
8 #include "platform/assert.h" | 8 #include "platform/assert.h" |
9 #include "vm/atomic.h" | 9 #include "vm/atomic.h" |
10 #include "vm/globals.h" | 10 #include "vm/globals.h" |
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1247 // The bit map representation is optimized for dense and small bit maps, without | 1247 // The bit map representation is optimized for dense and small bit maps, without |
1248 // any upper bound. | 1248 // any upper bound. |
1249 class RawStackmap : public RawObject { | 1249 class RawStackmap : public RawObject { |
1250 RAW_HEAP_OBJECT_IMPLEMENTATION(Stackmap); | 1250 RAW_HEAP_OBJECT_IMPLEMENTATION(Stackmap); |
1251 | 1251 |
1252 // Regarding changing this to a bitfield: ARM64 requires register_bit_count_ | 1252 // Regarding changing this to a bitfield: ARM64 requires register_bit_count_ |
1253 // to be as large as 96, meaning 7 bits, leaving 25 bits for the length, or | 1253 // to be as large as 96, meaning 7 bits, leaving 25 bits for the length, or |
1254 // as large as ~33 million entries. If that is sufficient, then these two | 1254 // as large as ~33 million entries. If that is sufficient, then these two |
1255 // fields can be merged into a BitField. | 1255 // fields can be merged into a BitField. |
1256 int32_t length_; // Length of payload, in bits. | 1256 int32_t length_; // Length of payload, in bits. |
1257 int32_t register_bit_count_; // Live register bits, included in length_. | 1257 int32_t slow_path_bit_count_; // Slow path live values, included in length_. |
1258 | 1258 |
1259 // Offset from code entry point corresponding to this stack map | 1259 // Offset from code entry point corresponding to this stack map |
1260 // representation. | 1260 // representation. |
1261 uint32_t pc_offset_; | 1261 uint32_t pc_offset_; |
1262 | 1262 |
1263 // Variable length data follows here (bitmap of the stack layout). | 1263 // Variable length data follows here (bitmap of the stack layout). |
1264 uint8_t* data() { OPEN_ARRAY_START(uint8_t, uint8_t); } | 1264 uint8_t* data() { OPEN_ARRAY_START(uint8_t, uint8_t); } |
1265 const uint8_t* data() const { OPEN_ARRAY_START(uint8_t, uint8_t); } | 1265 const uint8_t* data() const { OPEN_ARRAY_START(uint8_t, uint8_t); } |
1266 | 1266 |
1267 friend class SnapshotReader; | 1267 friend class SnapshotReader; |
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2355 COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid == | 2355 COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid == |
2356 kTypedDataInt8ArrayViewCid + 15); | 2356 kTypedDataInt8ArrayViewCid + 15); |
2357 COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14); | 2357 COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14); |
2358 COMPILE_ASSERT(kNullCid == kByteBufferCid + 1); | 2358 COMPILE_ASSERT(kNullCid == kByteBufferCid + 1); |
2359 return (kNullCid - kTypedDataInt8ArrayCid); | 2359 return (kNullCid - kTypedDataInt8ArrayCid); |
2360 } | 2360 } |
2361 | 2361 |
2362 } // namespace dart | 2362 } // namespace dart |
2363 | 2363 |
2364 #endif // VM_RAW_OBJECT_H_ | 2364 #endif // VM_RAW_OBJECT_H_ |
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