Line data Source code
1 : //===-- DWARFFormValue.cpp ------------------------------------------------===//
2 : //
3 : // The LLVM Compiler Infrastructure
4 : //
5 : // This file is distributed under the University of Illinois Open Source
6 : // License. See LICENSE.TXT for details.
7 : //
8 : //===----------------------------------------------------------------------===//
9 :
10 : #include "SyntaxHighlighting.h"
11 : #include "llvm/ADT/ArrayRef.h"
12 : #include "llvm/ADT/StringRef.h"
13 : #include "llvm/DebugInfo/DWARFCompileUnit.h"
14 : #include "llvm/DebugInfo/DWARFContext.h"
15 : #include "llvm/DebugInfo/DWARFFormValue.h"
16 : #include "llvm/Support/Debug.h"
17 : #include "llvm/Support/Dwarf.h"
18 : #include "llvm/Support/Format.h"
19 : #include "llvm/Support/raw_ostream.h"
20 : #include <cassert>
21 : using namespace llvm;
22 : using namespace dwarf;
23 : using namespace syntax;
24 :
25 : namespace {
26 : uint8_t getRefAddrSize(uint8_t AddrSize, uint16_t Version) {
27 : // FIXME: Support DWARF64.
28 7838024 : return (Version == 2) ? AddrSize : 4;
29 : }
30 :
31 : template <uint8_t AddrSize, uint8_t RefAddrSize>
32 : ArrayRef<uint8_t> makeFixedFormSizesArrayRef() {
33 : static const uint8_t sizes[] = {
34 : 0, // 0x00 unused
35 : AddrSize, // 0x01 DW_FORM_addr
36 : 0, // 0x02 unused
37 : 0, // 0x03 DW_FORM_block2
38 : 0, // 0x04 DW_FORM_block4
39 : 2, // 0x05 DW_FORM_data2
40 : 4, // 0x06 DW_FORM_data4
41 : 8, // 0x07 DW_FORM_data8
42 : 0, // 0x08 DW_FORM_string
43 : 0, // 0x09 DW_FORM_block
44 : 0, // 0x0a DW_FORM_block1
45 : 1, // 0x0b DW_FORM_data1
46 : 1, // 0x0c DW_FORM_flag
47 : 0, // 0x0d DW_FORM_sdata
48 : 4, // 0x0e DW_FORM_strp
49 : 0, // 0x0f DW_FORM_udata
50 : RefAddrSize, // 0x10 DW_FORM_ref_addr
51 : 1, // 0x11 DW_FORM_ref1
52 : 2, // 0x12 DW_FORM_ref2
53 : 4, // 0x13 DW_FORM_ref4
54 : 8, // 0x14 DW_FORM_ref8
55 : 0, // 0x15 DW_FORM_ref_udata
56 : 0, // 0x16 DW_FORM_indirect
57 : 4, // 0x17 DW_FORM_sec_offset
58 : 0, // 0x18 DW_FORM_exprloc
59 : 0, // 0x19 DW_FORM_flag_present
60 : };
61 : return makeArrayRef(sizes);
62 : }
63 : }
64 :
65 7837986 : ArrayRef<uint8_t> DWARFFormValue::getFixedFormSizes(uint8_t AddrSize,
66 : uint16_t Version) {
67 7837986 : uint8_t RefAddrSize = getRefAddrSize(AddrSize, Version);
68 7837986 : if (AddrSize == 4 && RefAddrSize == 4)
69 : return makeFixedFormSizesArrayRef<4, 4>();
70 7837835 : if (AddrSize == 4 && RefAddrSize == 8)
71 : return makeFixedFormSizesArrayRef<4, 8>();
72 7837835 : if (AddrSize == 8 && RefAddrSize == 4)
73 : return makeFixedFormSizesArrayRef<8, 4>();
74 1285 : if (AddrSize == 8 && RefAddrSize == 8)
75 : return makeFixedFormSizesArrayRef<8, 8>();
76 1 : return None;
77 : }
78 :
79 : static const DWARFFormValue::FormClass DWARF4FormClasses[] = {
80 : DWARFFormValue::FC_Unknown, // 0x0
81 : DWARFFormValue::FC_Address, // 0x01 DW_FORM_addr
82 : DWARFFormValue::FC_Unknown, // 0x02 unused
83 : DWARFFormValue::FC_Block, // 0x03 DW_FORM_block2
84 : DWARFFormValue::FC_Block, // 0x04 DW_FORM_block4
85 : DWARFFormValue::FC_Constant, // 0x05 DW_FORM_data2
86 : // --- These can be FC_SectionOffset in DWARF3 and below:
87 : DWARFFormValue::FC_Constant, // 0x06 DW_FORM_data4
88 : DWARFFormValue::FC_Constant, // 0x07 DW_FORM_data8
89 : // ---
90 : DWARFFormValue::FC_String, // 0x08 DW_FORM_string
91 : DWARFFormValue::FC_Block, // 0x09 DW_FORM_block
92 : DWARFFormValue::FC_Block, // 0x0a DW_FORM_block1
93 : DWARFFormValue::FC_Constant, // 0x0b DW_FORM_data1
94 : DWARFFormValue::FC_Flag, // 0x0c DW_FORM_flag
95 : DWARFFormValue::FC_Constant, // 0x0d DW_FORM_sdata
96 : DWARFFormValue::FC_String, // 0x0e DW_FORM_strp
97 : DWARFFormValue::FC_Constant, // 0x0f DW_FORM_udata
98 : DWARFFormValue::FC_Reference, // 0x10 DW_FORM_ref_addr
99 : DWARFFormValue::FC_Reference, // 0x11 DW_FORM_ref1
100 : DWARFFormValue::FC_Reference, // 0x12 DW_FORM_ref2
101 : DWARFFormValue::FC_Reference, // 0x13 DW_FORM_ref4
102 : DWARFFormValue::FC_Reference, // 0x14 DW_FORM_ref8
103 : DWARFFormValue::FC_Reference, // 0x15 DW_FORM_ref_udata
104 : DWARFFormValue::FC_Indirect, // 0x16 DW_FORM_indirect
105 : DWARFFormValue::FC_SectionOffset, // 0x17 DW_FORM_sec_offset
106 : DWARFFormValue::FC_Exprloc, // 0x18 DW_FORM_exprloc
107 : DWARFFormValue::FC_Flag, // 0x19 DW_FORM_flag_present
108 : };
109 :
110 111917 : bool DWARFFormValue::isFormClass(DWARFFormValue::FormClass FC) const {
111 : // First, check DWARF4 form classes.
112 335217 : if (Form < ArrayRef<FormClass>(DWARF4FormClasses).size() &&
113 111383 : DWARF4FormClasses[Form] == FC)
114 : return true;
115 : // Check DW_FORM_ref_sig8 from DWARF4.
116 30196 : if (Form == DW_FORM_ref_sig8)
117 63 : return (FC == FC_Reference);
118 : // Check for some DWARF5 forms.
119 30133 : if (Form == DW_FORM_GNU_addr_index)
120 43 : return (FC == FC_Address);
121 30090 : if (Form == DW_FORM_GNU_str_index)
122 428 : return (FC == FC_String);
123 : // In DWARF3 DW_FORM_data4 and DW_FORM_data8 served also as a section offset.
124 : // Don't check for DWARF version here, as some producers may still do this
125 : // by mistake.
126 29662 : if ((Form == DW_FORM_data4 || Form == DW_FORM_data8) &&
127 : FC == FC_SectionOffset)
128 : return true;
129 29187 : return false;
130 : }
131 :
132 102119 : bool DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
133 : const DWARFUnit *cu) {
134 102119 : bool indirect = false;
135 102119 : bool is_block = false;
136 102119 : Value.data = nullptr;
137 : // Read the value for the form into value and follow and DW_FORM_indirect
138 : // instances we run into
139 102119 : do {
140 102119 : indirect = false;
141 102119 : switch (Form) {
142 : case DW_FORM_addr:
143 : case DW_FORM_ref_addr: {
144 41904 : if (!cu)
145 0 : return false;
146 : uint16_t AddrSize =
147 : (Form == DW_FORM_addr)
148 41870 : ? cu->getAddressByteSize()
149 83808 : : getRefAddrSize(cu->getAddressByteSize(), cu->getVersion());
150 83808 : RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr);
151 167616 : if (AI != cu->getRelocMap()->end()) {
152 495 : const std::pair<uint8_t, int64_t> &R = AI->second;
153 495 : Value.uval = data.getUnsigned(offset_ptr, AddrSize) + R.second;
154 : } else
155 41409 : Value.uval = data.getUnsigned(offset_ptr, AddrSize);
156 41904 : break;
157 : }
158 : case DW_FORM_exprloc:
159 : case DW_FORM_block:
160 415 : Value.uval = data.getULEB128(offset_ptr);
161 415 : is_block = true;
162 415 : break;
163 : case DW_FORM_block1:
164 319 : Value.uval = data.getU8(offset_ptr);
165 319 : is_block = true;
166 319 : break;
167 : case DW_FORM_block2:
168 0 : Value.uval = data.getU16(offset_ptr);
169 0 : is_block = true;
170 0 : break;
171 : case DW_FORM_block4:
172 0 : Value.uval = data.getU32(offset_ptr);
173 0 : is_block = true;
174 0 : break;
175 : case DW_FORM_data1:
176 : case DW_FORM_ref1:
177 : case DW_FORM_flag:
178 3531 : Value.uval = data.getU8(offset_ptr);
179 3531 : break;
180 : case DW_FORM_data2:
181 : case DW_FORM_ref2:
182 331 : Value.uval = data.getU16(offset_ptr);
183 331 : break;
184 : case DW_FORM_data4:
185 : case DW_FORM_ref4: {
186 2828 : Value.uval = data.getU32(offset_ptr);
187 2828 : if (!cu)
188 : break;
189 5358 : RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
190 10716 : if (AI != cu->getRelocMap()->end())
191 256 : Value.uval += AI->second.second;
192 : break;
193 : }
194 : case DW_FORM_data8:
195 : case DW_FORM_ref8:
196 35071 : Value.uval = data.getU64(offset_ptr);
197 35071 : break;
198 : case DW_FORM_sdata:
199 41 : Value.sval = data.getSLEB128(offset_ptr);
200 41 : break;
201 : case DW_FORM_strp: {
202 3645 : Value.uval = data.getU32(offset_ptr);
203 3645 : if (!cu)
204 : break;
205 7290 : RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
206 14580 : if (AI != cu->getRelocMap()->end())
207 1671 : Value.uval += AI->second.second;
208 : break;
209 : }
210 : case DW_FORM_udata:
211 : case DW_FORM_ref_udata:
212 19 : Value.uval = data.getULEB128(offset_ptr);
213 19 : break;
214 : case DW_FORM_string:
215 92 : Value.cstr = data.getCStr(offset_ptr);
216 92 : break;
217 : case DW_FORM_indirect:
218 0 : Form = data.getULEB128(offset_ptr);
219 0 : indirect = true;
220 0 : break;
221 : case DW_FORM_sec_offset: {
222 : // FIXME: This is 64-bit for DWARF64.
223 12916 : Value.uval = data.getU32(offset_ptr);
224 12916 : if (!cu)
225 : break;
226 25832 : RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
227 51664 : if (AI != cu->getRelocMap()->end())
228 548 : Value.uval += AI->second.second;
229 : break;
230 : }
231 : case DW_FORM_flag_present:
232 801 : Value.uval = 1;
233 801 : break;
234 : case DW_FORM_ref_sig8:
235 31 : Value.uval = data.getU64(offset_ptr);
236 31 : break;
237 : case DW_FORM_GNU_addr_index:
238 : case DW_FORM_GNU_str_index:
239 175 : Value.uval = data.getULEB128(offset_ptr);
240 175 : break;
241 : default:
242 : return false;
243 : }
244 : } while (indirect);
245 :
246 102119 : if (is_block) {
247 1468 : StringRef str = data.getData().substr(*offset_ptr, Value.uval);
248 734 : Value.data = nullptr;
249 734 : if (!str.empty()) {
250 734 : Value.data = reinterpret_cast<const uint8_t *>(str.data());
251 734 : *offset_ptr += Value.uval;
252 : }
253 : }
254 :
255 : return true;
256 : }
257 :
258 : bool
259 0 : DWARFFormValue::skipValue(DataExtractor debug_info_data, uint32_t* offset_ptr,
260 : const DWARFUnit *cu) const {
261 0 : return DWARFFormValue::skipValue(Form, debug_info_data, offset_ptr, cu);
262 : }
263 :
264 : bool
265 6198796 : DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
266 : uint32_t *offset_ptr, const DWARFUnit *cu) {
267 6198796 : bool indirect = false;
268 : do {
269 6198796 : switch (form) {
270 : // Blocks if inlined data that have a length field and the data bytes
271 : // inlined in the .debug_info
272 : case DW_FORM_exprloc:
273 : case DW_FORM_block: {
274 204741 : uint64_t size = debug_info_data.getULEB128(offset_ptr);
275 204741 : *offset_ptr += size;
276 204741 : return true;
277 : }
278 : case DW_FORM_block1: {
279 1185 : uint8_t size = debug_info_data.getU8(offset_ptr);
280 1185 : *offset_ptr += size;
281 1185 : return true;
282 : }
283 : case DW_FORM_block2: {
284 139 : uint16_t size = debug_info_data.getU16(offset_ptr);
285 139 : *offset_ptr += size;
286 139 : return true;
287 : }
288 : case DW_FORM_block4: {
289 0 : uint32_t size = debug_info_data.getU32(offset_ptr);
290 0 : *offset_ptr += size;
291 0 : return true;
292 : }
293 :
294 : // Inlined NULL terminated C-strings
295 : case DW_FORM_string:
296 317315 : debug_info_data.getCStr(offset_ptr);
297 317315 : return true;
298 :
299 : // Compile unit address sized values
300 : case DW_FORM_addr:
301 36682 : *offset_ptr += cu->getAddressByteSize();
302 36682 : return true;
303 : case DW_FORM_ref_addr:
304 8 : *offset_ptr += getRefAddrSize(cu->getAddressByteSize(), cu->getVersion());
305 4 : return true;
306 :
307 : // 0 byte values - implied from the form.
308 : case DW_FORM_flag_present:
309 : return true;
310 :
311 : // 1 byte values
312 : case DW_FORM_data1:
313 : case DW_FORM_flag:
314 : case DW_FORM_ref1:
315 36334 : *offset_ptr += 1;
316 36334 : return true;
317 :
318 : // 2 byte values
319 : case DW_FORM_data2:
320 : case DW_FORM_ref2:
321 4345 : *offset_ptr += 2;
322 4345 : return true;
323 :
324 : // 4 byte values
325 : case DW_FORM_strp:
326 : case DW_FORM_data4:
327 : case DW_FORM_ref4:
328 171220 : *offset_ptr += 4;
329 171220 : return true;
330 :
331 : // 8 byte values
332 : case DW_FORM_data8:
333 : case DW_FORM_ref8:
334 : case DW_FORM_ref_sig8:
335 127 : *offset_ptr += 8;
336 127 : return true;
337 :
338 : // signed or unsigned LEB 128 values
339 : // case DW_FORM_APPLE_db_str:
340 : case DW_FORM_sdata:
341 : case DW_FORM_udata:
342 : case DW_FORM_ref_udata:
343 : case DW_FORM_GNU_str_index:
344 : case DW_FORM_GNU_addr_index:
345 175494 : debug_info_data.getULEB128(offset_ptr);
346 175494 : return true;
347 :
348 : case DW_FORM_indirect:
349 0 : indirect = true;
350 0 : form = debug_info_data.getULEB128(offset_ptr);
351 : break;
352 :
353 : // FIXME: 4 for DWARF32, 8 for DWARF64.
354 : case DW_FORM_sec_offset:
355 21878 : *offset_ptr += 4;
356 21878 : return true;
357 :
358 : default:
359 0 : return false;
360 : }
361 : } while (indirect);
362 : return true;
363 : }
364 :
365 : void
366 7919 : DWARFFormValue::dump(raw_ostream &OS, const DWARFUnit *cu) const {
367 7919 : uint64_t uvalue = Value.uval;
368 7919 : bool cu_relative_offset = false;
369 :
370 7919 : switch (Form) {
371 2100 : case DW_FORM_addr: OS << format("0x%016" PRIx64, uvalue); break;
372 : case DW_FORM_GNU_addr_index: {
373 54 : OS << format(" indexed (%8.8x) address = ", (uint32_t)uvalue);
374 : uint64_t Address;
375 18 : if (cu->getAddrOffsetSectionItem(uvalue, Address))
376 54 : OS << format("0x%016" PRIx64, Address);
377 : else
378 0 : OS << "<no .debug_addr section>";
379 : break;
380 : }
381 801 : case DW_FORM_flag_present: OS << "true"; break;
382 : case DW_FORM_flag:
383 2934 : case DW_FORM_data1: OS << format("0x%02x", (uint8_t)uvalue); break;
384 138 : case DW_FORM_data2: OS << format("0x%04x", (uint16_t)uvalue); break;
385 1725 : case DW_FORM_data4: OS << format("0x%08x", (uint32_t)uvalue); break;
386 : case DW_FORM_ref_sig8:
387 174 : case DW_FORM_data8: OS << format("0x%016" PRIx64, uvalue); break;
388 : case DW_FORM_string:
389 67 : OS << '"';
390 134 : OS.write_escaped(Value.cstr);
391 67 : OS << '"';
392 67 : break;
393 : case DW_FORM_exprloc:
394 : case DW_FORM_block:
395 : case DW_FORM_block1:
396 : case DW_FORM_block2:
397 : case DW_FORM_block4:
398 734 : if (uvalue > 0) {
399 734 : switch (Form) {
400 : case DW_FORM_exprloc:
401 1245 : case DW_FORM_block: OS << format("<0x%" PRIx64 "> ", uvalue); break;
402 957 : case DW_FORM_block1: OS << format("<0x%2.2x> ", (uint8_t)uvalue); break;
403 0 : case DW_FORM_block2: OS << format("<0x%4.4x> ", (uint16_t)uvalue); break;
404 0 : case DW_FORM_block4: OS << format("<0x%8.8x> ", (uint32_t)uvalue); break;
405 : default: break;
406 : }
407 :
408 734 : const uint8_t* data_ptr = Value.data;
409 734 : if (data_ptr) {
410 : // uvalue contains size of block
411 734 : const uint8_t* end_data_ptr = data_ptr + uvalue;
412 3331 : while (data_ptr < end_data_ptr) {
413 3726 : OS << format("%2.2x ", *data_ptr);
414 1863 : ++data_ptr;
415 : }
416 : }
417 : else
418 0 : OS << "NULL";
419 : }
420 : break;
421 :
422 41 : case DW_FORM_sdata: OS << Value.sval; break;
423 19 : case DW_FORM_udata: OS << Value.uval; break;
424 : case DW_FORM_strp: {
425 6129 : OS << format(" .debug_str[0x%8.8x] = ", (uint32_t)uvalue);
426 2043 : Optional<const char *> DbgStr = getAsCString(cu);
427 2043 : if (DbgStr.hasValue()) {
428 4086 : raw_ostream &COS = WithColor(OS, syntax::String);
429 2043 : COS << '"';
430 4086 : COS.write_escaped(DbgStr.getValue());
431 2043 : COS << '"';
432 : }
433 : break;
434 : }
435 : case DW_FORM_GNU_str_index: {
436 414 : OS << format(" indexed (%8.8x) string = ", (uint32_t)uvalue);
437 138 : Optional<const char *> DbgStr = getAsCString(cu);
438 138 : if (DbgStr.hasValue()) {
439 276 : raw_ostream &COS = WithColor(OS, syntax::String);
440 138 : COS << '"';
441 276 : COS.write_escaped(DbgStr.getValue());
442 138 : COS << '"';
443 : }
444 : break;
445 : }
446 : case DW_FORM_ref_addr:
447 99 : OS << format("0x%016" PRIx64, uvalue);
448 33 : break;
449 : case DW_FORM_ref1:
450 0 : cu_relative_offset = true;
451 0 : OS << format("cu + 0x%2.2x", (uint8_t)uvalue);
452 0 : break;
453 : case DW_FORM_ref2:
454 0 : cu_relative_offset = true;
455 0 : OS << format("cu + 0x%4.4x", (uint16_t)uvalue);
456 0 : break;
457 : case DW_FORM_ref4:
458 1452 : cu_relative_offset = true;
459 4356 : OS << format("cu + 0x%4.4x", (uint32_t)uvalue);
460 1452 : break;
461 : case DW_FORM_ref8:
462 0 : cu_relative_offset = true;
463 0 : OS << format("cu + 0x%8.8" PRIx64, uvalue);
464 0 : break;
465 : case DW_FORM_ref_udata:
466 0 : cu_relative_offset = true;
467 0 : OS << format("cu + 0x%" PRIx64, uvalue);
468 0 : break;
469 :
470 : // All DW_FORM_indirect attributes should be resolved prior to calling
471 : // this function
472 : case DW_FORM_indirect:
473 0 : OS << "DW_FORM_indirect";
474 0 : break;
475 :
476 : // Should be formatted to 64-bit for DWARF64.
477 : case DW_FORM_sec_offset:
478 648 : OS << format("0x%08x", (uint32_t)uvalue);
479 216 : break;
480 :
481 : default:
482 0 : OS << format("DW_FORM(0x%4.4x)", Form);
483 0 : break;
484 : }
485 :
486 7919 : if (cu_relative_offset) {
487 1452 : OS << " => {";
488 2904 : WithColor(OS, syntax::Address).get()
489 4356 : << format("0x%8.8" PRIx64, uvalue + (cu ? cu->getOffset() : 0));
490 1452 : OS << "}";
491 : }
492 7919 : }
493 :
494 3821 : Optional<const char *> DWARFFormValue::getAsCString(const DWARFUnit *U) const {
495 3821 : if (!isFormClass(FC_String))
496 : return None;
497 3821 : if (Form == DW_FORM_string)
498 25 : return Value.cstr;
499 3796 : if (!U)
500 : return None;
501 3796 : uint32_t Offset = Value.uval;
502 3796 : if (Form == DW_FORM_GNU_str_index) {
503 : uint32_t StrOffset;
504 151 : if (!U->getStringOffsetSectionItem(Offset, StrOffset))
505 0 : return None;
506 151 : Offset = StrOffset;
507 : }
508 3796 : if (const char *Str = U->getStringExtractor().getCStr(&Offset)) {
509 : return Str;
510 : }
511 : return None;
512 : }
513 :
514 58712 : Optional<uint64_t> DWARFFormValue::getAsAddress(const DWARFUnit *U) const {
515 58712 : if (!isFormClass(FC_Address))
516 : return None;
517 41176 : if (Form == DW_FORM_GNU_addr_index) {
518 6 : uint32_t Index = Value.uval;
519 : uint64_t Result;
520 6 : if (!U || !U->getAddrOffsetSectionItem(Index, Result))
521 : return None;
522 : return Result;
523 : }
524 41170 : return Value.uval;
525 : }
526 :
527 414 : Optional<uint64_t> DWARFFormValue::getAsReference(const DWARFUnit *U) const {
528 414 : if (!isFormClass(FC_Reference))
529 : return None;
530 414 : switch (Form) {
531 : case DW_FORM_ref1:
532 : case DW_FORM_ref2:
533 : case DW_FORM_ref4:
534 : case DW_FORM_ref8:
535 : case DW_FORM_ref_udata:
536 406 : if (!U)
537 : return None;
538 406 : return Value.uval + U->getOffset();
539 : case DW_FORM_ref_addr:
540 8 : return Value.uval;
541 : // FIXME: Add proper support for DW_FORM_ref_sig8
542 : default:
543 0 : return Value.uval;
544 : }
545 : }
546 :
547 13174 : Optional<uint64_t> DWARFFormValue::getAsSectionOffset() const {
548 13174 : if (!isFormClass(FC_SectionOffset))
549 : return None;
550 13174 : return Value.uval;
551 : }
552 :
553 29195 : Optional<uint64_t> DWARFFormValue::getAsUnsignedConstant() const {
554 64981 : if ((!isFormClass(FC_Constant) && !isFormClass(FC_Flag))
555 52958 : || Form == DW_FORM_sdata)
556 : return None;
557 23722 : return Value.uval;
558 : }
559 :
560 0 : Optional<ArrayRef<uint8_t>> DWARFFormValue::getAsBlock() const {
561 0 : if (!isFormClass(FC_Block) && !isFormClass(FC_Exprloc))
562 : return None;
563 0 : return ArrayRef<uint8_t>(Value.data, Value.uval);
564 : }
565 :
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