"clang/git@repo.hca.bsc.es:rferrer/llvm-epi-0.8.git" did not exist on "8c07e75a61110a4cbaeac6fffd0972dfcc372b3d"
Newer
Older
return true;
}
bool
IRInterpreter::runOnFunction (lldb::ClangExpressionVariableSP &result,
const lldb_private::ConstString &result_name,
lldb_private::TypeFromParser result_type,
Function &llvm_function,
Module &llvm_module,
lldb_private::Error &err)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
lldb_private::ClangExpressionDeclMap::TargetInfo target_info = m_decl_map.GetTargetInfo();
if (!target_info.IsValid())
{
err.SetErrorToGenericError();
err.SetErrorString(interpreter_initialization_error);
lldb::addr_t alloc_min;
lldb::addr_t alloc_max;
switch (target_info.address_byte_size)
{
default:
err.SetErrorToGenericError();
err.SetErrorString(interpreter_initialization_error);
return false;
case 4:
alloc_min = 0x00001000llu;
alloc_max = 0x0000ffffllu;
break;
case 8:
alloc_min = 0x0000000000001000llu;
alloc_max = 0x000000000000ffffllu;
break;
}
TargetData target_data(&llvm_module);
if (target_data.getPointerSize() != target_info.address_byte_size)
{
err.SetErrorToGenericError();
err.SetErrorString(interpreter_initialization_error);
if (target_data.isLittleEndian() != (target_info.byte_order == lldb::eByteOrderLittle))
{
err.SetErrorToGenericError();
err.SetErrorString(interpreter_initialization_error);
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
Memory memory(target_data, m_decl_map, alloc_min, alloc_max);
InterpreterStackFrame frame(target_data, memory, m_decl_map);
uint32_t num_insts = 0;
frame.Jump(llvm_function.begin());
while (frame.m_ii != frame.m_ie && (++num_insts < 4096))
{
const Instruction *inst = frame.m_ii;
if (log)
log->Printf("Interpreting %s", PrintValue(inst).c_str());
switch (inst->getOpcode())
{
default:
break;
case Instruction::Add:
case Instruction::Sub:
case Instruction::Mul:
case Instruction::SDiv:
case Instruction::UDiv:
{
const BinaryOperator *bin_op = dyn_cast<BinaryOperator>(inst);
if (!bin_op)
{
if (log)
log->Printf("getOpcode() returns %s, but instruction is not a BinaryOperator", inst->getOpcodeName());
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
Value *lhs = inst->getOperand(0);
Value *rhs = inst->getOperand(1);
lldb_private::Scalar L;
lldb_private::Scalar R;
if (!frame.EvaluateValue(L, lhs, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(lhs).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
if (!frame.EvaluateValue(R, rhs, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(rhs).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
return false;
}
lldb_private::Scalar result;
switch (inst->getOpcode())
{
default:
break;
case Instruction::Add:
result = L + R;
break;
case Instruction::Mul:
result = L * R;
break;
case Instruction::Sub:
result = L - R;
break;
case Instruction::SDiv:
result = L / R;
break;
case Instruction::UDiv:
result = L.GetRawBits64(0) / R.GetRawBits64(1);
break;
}
frame.AssignValue(inst, result, llvm_module);
if (log)
{
log->Printf("Interpreted a %s", inst->getOpcodeName());
log->Printf(" L : %s", frame.SummarizeValue(lhs).c_str());
log->Printf(" R : %s", frame.SummarizeValue(rhs).c_str());
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
}
}
break;
case Instruction::Alloca:
{
const AllocaInst *alloca_inst = dyn_cast<AllocaInst>(inst);
if (!alloca_inst)
{
if (log)
log->Printf("getOpcode() returns Alloca, but instruction is not an AllocaInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
if (alloca_inst->isArrayAllocation())
{
if (log)
log->Printf("AllocaInsts are not handled if isArrayAllocation() is true");
err.SetErrorToGenericError();
err.SetErrorString(unsupported_opcode_error);
return false;
}
// The semantics of Alloca are:
// Create a region R of virtual memory of type T, backed by a data buffer
// Create a region P of virtual memory of type T*, backed by a data buffer
// Write the virtual address of R into P
Type *T = alloca_inst->getAllocatedType();
Type *Tptr = alloca_inst->getType();
Memory::Region R = memory.Malloc(T);
if (R.IsInvalid())
{
if (log)
log->Printf("Couldn't allocate memory for an AllocaInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_allocation_error);
return false;
}
Memory::Region P = memory.Malloc(Tptr);
if (P.IsInvalid())
{
if (log)
log->Printf("Couldn't allocate the result pointer for an AllocaInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_allocation_error);
return false;
}
DataEncoderSP P_encoder = memory.GetEncoder(P);
if (P_encoder->PutAddress(0, R.m_base) == UINT32_MAX)
{
if (log)
log->Printf("Couldn't write the result pointer for an AllocaInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_write_error);
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
return false;
}
frame.m_values[alloca_inst] = P;
if (log)
{
log->Printf("Interpreted an AllocaInst");
log->Printf(" R : %s", memory.SummarizeRegion(R).c_str());
log->Printf(" P : %s", frame.SummarizeValue(alloca_inst).c_str());
}
}
break;
case Instruction::BitCast:
{
const BitCastInst *bit_cast_inst = dyn_cast<BitCastInst>(inst);
if (!bit_cast_inst)
{
if (log)
log->Printf("getOpcode() returns BitCast, but instruction is not a BitCastInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
Value *source = bit_cast_inst->getOperand(0);
lldb_private::Scalar S;
if (!frame.EvaluateValue(S, source, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(source).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
frame.AssignValue(inst, S, llvm_module);
}
break;
case Instruction::Br:
{
const BranchInst *br_inst = dyn_cast<BranchInst>(inst);
if (!br_inst)
{
if (log)
log->Printf("getOpcode() returns Br, but instruction is not a BranchInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
if (br_inst->isConditional())
{
Value *condition = br_inst->getCondition();
lldb_private::Scalar C;
if (!frame.EvaluateValue(C, condition, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(condition).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
return false;
}
if (C.GetRawBits64(0))
frame.Jump(br_inst->getSuccessor(0));
else
frame.Jump(br_inst->getSuccessor(1));
if (log)
{
log->Printf("Interpreted a BrInst with a condition");
log->Printf(" cond : %s", frame.SummarizeValue(condition).c_str());
}
}
else
{
frame.Jump(br_inst->getSuccessor(0));
if (log)
{
log->Printf("Interpreted a BrInst with no condition");
}
}
}
continue;
case Instruction::GetElementPtr:
{
const GetElementPtrInst *gep_inst = dyn_cast<GetElementPtrInst>(inst);
if (!gep_inst)
{
if (log)
log->Printf("getOpcode() returns GetElementPtr, but instruction is not a GetElementPtrInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
const Value *pointer_operand = gep_inst->getPointerOperand();
Type *pointer_type = pointer_operand->getType();
lldb_private::Scalar P;
if (!frame.EvaluateValue(P, pointer_operand, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(pointer_operand).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
typedef SmallVector <Value *, 8> IndexVector;
typedef IndexVector::iterator IndexIterator;
SmallVector <Value *, 8> indices (gep_inst->idx_begin(),
gep_inst->idx_end());
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
SmallVector <Value *, 8> const_indices;
for (IndexIterator ii = indices.begin(), ie = indices.end();
ii != ie;
++ii)
{
ConstantInt *constant_index = dyn_cast<ConstantInt>(*ii);
if (!constant_index)
{
lldb_private::Scalar I;
if (!frame.EvaluateValue(I, *ii, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(*ii).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
if (log)
log->Printf("Evaluated constant index %s as %llu", PrintValue(*ii).c_str(), I.ULongLong(LLDB_INVALID_ADDRESS));
constant_index = cast<ConstantInt>(ConstantInt::get((*ii)->getType(), I.ULongLong(LLDB_INVALID_ADDRESS)));
}
const_indices.push_back(constant_index);
}
uint64_t offset = target_data.getIndexedOffset(pointer_type, const_indices);
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
lldb_private::Scalar Poffset = P + offset;
frame.AssignValue(inst, Poffset, llvm_module);
if (log)
{
log->Printf("Interpreted a GetElementPtrInst");
log->Printf(" P : %s", frame.SummarizeValue(pointer_operand).c_str());
log->Printf(" Poffset : %s", frame.SummarizeValue(inst).c_str());
}
}
break;
case Instruction::ICmp:
{
const ICmpInst *icmp_inst = dyn_cast<ICmpInst>(inst);
if (!icmp_inst)
{
if (log)
log->Printf("getOpcode() returns ICmp, but instruction is not an ICmpInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
CmpInst::Predicate predicate = icmp_inst->getPredicate();
Value *lhs = inst->getOperand(0);
Value *rhs = inst->getOperand(1);
lldb_private::Scalar L;
lldb_private::Scalar R;
if (!frame.EvaluateValue(L, lhs, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(lhs).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
if (!frame.EvaluateValue(R, rhs, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(rhs).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
return false;
}
lldb_private::Scalar result;
switch (predicate)
{
default:
return false;
case CmpInst::ICMP_EQ:
result = (L == R);
break;
case CmpInst::ICMP_NE:
result = (L != R);
break;
case CmpInst::ICMP_UGT:
result = (L.GetRawBits64(0) > R.GetRawBits64(0));
break;
case CmpInst::ICMP_UGE:
result = (L.GetRawBits64(0) >= R.GetRawBits64(0));
break;
case CmpInst::ICMP_ULT:
result = (L.GetRawBits64(0) < R.GetRawBits64(0));
break;
case CmpInst::ICMP_ULE:
result = (L.GetRawBits64(0) <= R.GetRawBits64(0));
break;
case CmpInst::ICMP_SGT:
result = (L > R);
break;
case CmpInst::ICMP_SGE:
result = (L >= R);
break;
case CmpInst::ICMP_SLT:
result = (L < R);
break;
case CmpInst::ICMP_SLE:
result = (L <= R);
break;
}
frame.AssignValue(inst, result, llvm_module);
if (log)
{
log->Printf("Interpreted an ICmpInst");
log->Printf(" L : %s", frame.SummarizeValue(lhs).c_str());
log->Printf(" R : %s", frame.SummarizeValue(rhs).c_str());
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
}
}
break;
case Instruction::IntToPtr:
{
const IntToPtrInst *int_to_ptr_inst = dyn_cast<IntToPtrInst>(inst);
if (!int_to_ptr_inst)
{
if (log)
log->Printf("getOpcode() returns IntToPtr, but instruction is not an IntToPtrInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
Value *src_operand = int_to_ptr_inst->getOperand(0);
lldb_private::Scalar I;
if (!frame.EvaluateValue(I, src_operand, llvm_module))
{
if (log)
log->Printf("Couldn't evaluate %s", PrintValue(src_operand).c_str());
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
frame.AssignValue(inst, I, llvm_module);
if (log)
{
log->Printf("Interpreted an IntToPtr");
log->Printf(" Src : %s", frame.SummarizeValue(src_operand).c_str());
log->Printf(" = : %s", frame.SummarizeValue(inst).c_str());
}
}
break;
case Instruction::Load:
{
const LoadInst *load_inst = dyn_cast<LoadInst>(inst);
if (!load_inst)
{
if (log)
log->Printf("getOpcode() returns Load, but instruction is not a LoadInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
return false;
}
// The semantics of Load are:
// Create a region D that will contain the loaded data
// Resolve the region P containing a pointer
// Dereference P to get the region R that the data should be loaded from
// Transfer a unit of type type(D) from R to D
const Value *pointer_operand = load_inst->getPointerOperand();
Type *pointer_ty = pointer_operand->getType();
PointerType *pointer_ptr_ty = dyn_cast<PointerType>(pointer_ty);
if (!pointer_ptr_ty)
{
if (log)
log->Printf("getPointerOperand()->getType() is not a PointerType");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
Type *target_ty = pointer_ptr_ty->getElementType();
Memory::Region D = frame.ResolveValue(load_inst, llvm_module);
Memory::Region P = frame.ResolveValue(pointer_operand, llvm_module);
if (D.IsInvalid())
{
if (log)
log->Printf("LoadInst's value doesn't resolve to anything");
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
if (P.IsInvalid())
{
if (log)
log->Printf("LoadInst's pointer doesn't resolve to anything");
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
DataExtractorSP P_extractor(memory.GetExtractor(P));
DataEncoderSP D_encoder(memory.GetEncoder(D));
uint32_t offset = 0;
lldb::addr_t pointer = P_extractor->GetAddress(&offset);
Memory::Region R = memory.Lookup(pointer, target_ty);
if (R.IsValid())
{
if (!memory.Read(D_encoder->GetDataStart(), R.m_base, target_data.getTypeStoreSize(target_ty)))
{
if (log)
log->Printf("Couldn't read from a region on behalf of a LoadInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_read_error);
return false;
}
}
else
{
if (!memory.ReadFromRawPtr(D_encoder->GetDataStart(), pointer, target_data.getTypeStoreSize(target_ty)))
{
if (log)
log->Printf("Couldn't read from a raw pointer on behalf of a LoadInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_read_error);
return false;
}
}
if (log)
{
log->Printf("Interpreted a LoadInst");
log->Printf(" P : %s", frame.SummarizeValue(pointer_operand).c_str());
if (R.IsValid())
log->Printf(" R : %s", memory.SummarizeRegion(R).c_str());
else
log->Printf(" R : raw pointer 0x%llx", (unsigned long long)pointer);
log->Printf(" D : %s", frame.SummarizeValue(load_inst).c_str());
}
}
break;
case Instruction::Ret:
{
if (result_name.IsEmpty())
return true;
GlobalValue *result_value = llvm_module.getNamedValue(result_name.GetCString());
if (!frame.ConstructResult(result, result_value, result_name, result_type, llvm_module))
{
if (log)
log->Printf("Couldn't construct the expression's result");
err.SetErrorToGenericError();
err.SetErrorString(bad_result_error);
return false;
}
return true;
}
case Instruction::Store:
{
const StoreInst *store_inst = dyn_cast<StoreInst>(inst);
if (!store_inst)
{
if (log)
log->Printf("getOpcode() returns Store, but instruction is not a StoreInst");
err.SetErrorToGenericError();
err.SetErrorString(interpreter_internal_error);
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
return false;
}
// The semantics of Store are:
// Resolve the region D containing the data to be stored
// Resolve the region P containing a pointer
// Dereference P to get the region R that the data should be stored in
// Transfer a unit of type type(D) from D to R
const Value *value_operand = store_inst->getValueOperand();
const Value *pointer_operand = store_inst->getPointerOperand();
Type *pointer_ty = pointer_operand->getType();
PointerType *pointer_ptr_ty = dyn_cast<PointerType>(pointer_ty);
if (!pointer_ptr_ty)
return false;
Type *target_ty = pointer_ptr_ty->getElementType();
Memory::Region D = frame.ResolveValue(value_operand, llvm_module);
Memory::Region P = frame.ResolveValue(pointer_operand, llvm_module);
if (D.IsInvalid())
{
if (log)
log->Printf("StoreInst's value doesn't resolve to anything");
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
if (P.IsInvalid())
{
if (log)
log->Printf("StoreInst's pointer doesn't resolve to anything");
err.SetErrorToGenericError();
err.SetErrorString(bad_value_error);
return false;
}
DataExtractorSP P_extractor(memory.GetExtractor(P));
DataExtractorSP D_extractor(memory.GetExtractor(D));
if (!P_extractor || !D_extractor)
return false;
uint32_t offset = 0;
lldb::addr_t pointer = P_extractor->GetAddress(&offset);
Memory::Region R = memory.Lookup(pointer, target_ty);
if (!memory.Write(R.m_base, D_extractor->GetDataStart(), target_data.getTypeStoreSize(target_ty)))
{
if (log)
log->Printf("Couldn't write to a region on behalf of a LoadInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_write_error);
return false;
}
}
else
{
if (!memory.WriteToRawPtr(pointer, D_extractor->GetDataStart(), target_data.getTypeStoreSize(target_ty)))
{
if (log)
log->Printf("Couldn't write to a raw pointer on behalf of a LoadInst");
err.SetErrorToGenericError();
err.SetErrorString(memory_write_error);
return false;
}
}
if (log)
{
log->Printf("Interpreted a StoreInst");
log->Printf(" D : %s", frame.SummarizeValue(value_operand).c_str());
log->Printf(" P : %s", frame.SummarizeValue(pointer_operand).c_str());
log->Printf(" R : %s", memory.SummarizeRegion(R).c_str());
}
}
break;
}
++frame.m_ii;
}
if (num_insts >= 4096)
{
err.SetErrorToGenericError();
err.SetErrorString(infinite_loop_error);
