Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 1 | //===-- ValueObjectVariable.cpp ---------------------------------*- C++ -*-===// |
| 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 | |
| 11 | #include "lldb/Core/ValueObjectVariable.h" |
| 12 | |
| 13 | // C Includes |
| 14 | // C++ Includes |
| 15 | // Other libraries and framework includes |
| 16 | // Project includes |
| 17 | #include "lldb/Core/Module.h" |
| 18 | #include "lldb/Core/ValueObjectList.h" |
| 19 | #include "lldb/Core/Value.h" |
| 20 | |
Greg Clayton | 49ce896 | 2012-08-29 21:13:06 +0000 | [diff] [blame] | 21 | #include "lldb/Symbol/Function.h" |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 22 | #include "lldb/Symbol/ObjectFile.h" |
| 23 | #include "lldb/Symbol/SymbolContext.h" |
Greg Clayton | 801417e | 2011-07-07 01:59:51 +0000 | [diff] [blame] | 24 | #include "lldb/Symbol/SymbolContextScope.h" |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 25 | #include "lldb/Symbol/Type.h" |
| 26 | #include "lldb/Symbol/Variable.h" |
| 27 | |
| 28 | #include "lldb/Target/ExecutionContext.h" |
| 29 | #include "lldb/Target/Process.h" |
| 30 | #include "lldb/Target/RegisterContext.h" |
| 31 | #include "lldb/Target/Target.h" |
| 32 | #include "lldb/Target/Thread.h" |
| 33 | |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 34 | |
| 35 | using namespace lldb_private; |
| 36 | |
Jim Ingham | 47da810 | 2011-04-22 23:53:53 +0000 | [diff] [blame] | 37 | lldb::ValueObjectSP |
| 38 | ValueObjectVariable::Create (ExecutionContextScope *exe_scope, const lldb::VariableSP &var_sp) |
| 39 | { |
| 40 | return (new ValueObjectVariable (exe_scope, var_sp))->GetSP(); |
| 41 | } |
| 42 | |
Jim Ingham | fa3a16a | 2011-03-31 00:19:25 +0000 | [diff] [blame] | 43 | ValueObjectVariable::ValueObjectVariable (ExecutionContextScope *exe_scope, const lldb::VariableSP &var_sp) : |
| 44 | ValueObject(exe_scope), |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 45 | m_variable_sp(var_sp) |
| 46 | { |
| 47 | // Do not attempt to construct one of these objects with no variable! |
| 48 | assert (m_variable_sp.get() != NULL); |
| 49 | m_name = var_sp->GetName(); |
| 50 | } |
| 51 | |
| 52 | ValueObjectVariable::~ValueObjectVariable() |
| 53 | { |
| 54 | } |
| 55 | |
Greg Clayton | b01000f | 2011-01-17 03:46:26 +0000 | [diff] [blame] | 56 | lldb::clang_type_t |
Sean Callanan | 931acec | 2012-02-22 23:57:45 +0000 | [diff] [blame] | 57 | ValueObjectVariable::GetClangTypeImpl () |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 58 | { |
| 59 | Type *var_type = m_variable_sp->GetType(); |
| 60 | if (var_type) |
Greg Clayton | b01000f | 2011-01-17 03:46:26 +0000 | [diff] [blame] | 61 | return var_type->GetClangForwardType(); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 62 | return NULL; |
| 63 | } |
| 64 | |
| 65 | ConstString |
| 66 | ValueObjectVariable::GetTypeName() |
| 67 | { |
| 68 | Type * var_type = m_variable_sp->GetType(); |
| 69 | if (var_type) |
| 70 | return var_type->GetName(); |
Greg Clayton | dc0a38c | 2012-03-26 23:03:23 +0000 | [diff] [blame] | 71 | return ConstString(); |
| 72 | } |
| 73 | |
| 74 | ConstString |
| 75 | ValueObjectVariable::GetQualifiedTypeName() |
| 76 | { |
| 77 | Type * var_type = m_variable_sp->GetType(); |
| 78 | if (var_type) |
| 79 | return var_type->GetQualifiedName(); |
| 80 | return ConstString(); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | uint32_t |
| 84 | ValueObjectVariable::CalculateNumChildren() |
Sean Callanan | 931acec | 2012-02-22 23:57:45 +0000 | [diff] [blame] | 85 | { |
| 86 | ClangASTType type(GetClangAST(), |
| 87 | GetClangType()); |
| 88 | |
| 89 | if (!type.IsValid()) |
| 90 | return 0; |
| 91 | |
| 92 | const bool omit_empty_base_classes = true; |
| 93 | return ClangASTContext::GetNumChildren(type.GetASTContext(), type.GetOpaqueQualType(), omit_empty_base_classes); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | clang::ASTContext * |
Sean Callanan | 931acec | 2012-02-22 23:57:45 +0000 | [diff] [blame] | 97 | ValueObjectVariable::GetClangASTImpl () |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 98 | { |
Jim Ingham | bdc85ee | 2011-10-31 23:06:45 +0000 | [diff] [blame] | 99 | Type *var_type = m_variable_sp->GetType(); |
| 100 | if (var_type) |
| 101 | return var_type->GetClangAST(); |
| 102 | return 0; |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | size_t |
| 106 | ValueObjectVariable::GetByteSize() |
| 107 | { |
Sean Callanan | 931acec | 2012-02-22 23:57:45 +0000 | [diff] [blame] | 108 | ClangASTType type(GetClangAST(), |
| 109 | GetClangType()); |
| 110 | |
| 111 | if (!type.IsValid()) |
| 112 | return 0; |
| 113 | |
| 114 | return (ClangASTType::GetClangTypeBitWidth(type.GetASTContext(), type.GetOpaqueQualType()) + 7) / 8; |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | lldb::ValueType |
| 118 | ValueObjectVariable::GetValueType() const |
| 119 | { |
| 120 | if (m_variable_sp) |
| 121 | return m_variable_sp->GetScope(); |
| 122 | return lldb::eValueTypeInvalid; |
| 123 | } |
| 124 | |
Jim Ingham | fa3a16a | 2011-03-31 00:19:25 +0000 | [diff] [blame] | 125 | bool |
| 126 | ValueObjectVariable::UpdateValue () |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 127 | { |
| 128 | SetValueIsValid (false); |
| 129 | m_error.Clear(); |
| 130 | |
| 131 | Variable *variable = m_variable_sp.get(); |
| 132 | DWARFExpression &expr = variable->LocationExpression(); |
Greg Clayton | 1e30afd | 2010-09-18 04:00:06 +0000 | [diff] [blame] | 133 | |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 134 | if (variable->GetLocationIsConstantValueData()) |
Greg Clayton | 1e30afd | 2010-09-18 04:00:06 +0000 | [diff] [blame] | 135 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 136 | // expr doesn't contain DWARF bytes, it contains the constant variable |
| 137 | // value bytes themselves... |
| 138 | if (expr.GetExpressionData(m_data)) |
| 139 | m_value.SetContext(Value::eContextTypeVariable, variable); |
| 140 | else |
| 141 | m_error.SetErrorString ("empty constant data"); |
Greg Clayton | 1e30afd | 2010-09-18 04:00:06 +0000 | [diff] [blame] | 142 | } |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 143 | else |
Greg Clayton | 178710c | 2010-09-14 02:20:48 +0000 | [diff] [blame] | 144 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 145 | lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS; |
Greg Clayton | b4d7fc0 | 2012-02-17 07:49:44 +0000 | [diff] [blame] | 146 | ExecutionContext exe_ctx (GetExecutionContextRef()); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 147 | |
Greg Clayton | 567e7f3 | 2011-09-22 04:58:26 +0000 | [diff] [blame] | 148 | Target *target = exe_ctx.GetTargetPtr(); |
| 149 | if (target) |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 150 | { |
Greg Clayton | 567e7f3 | 2011-09-22 04:58:26 +0000 | [diff] [blame] | 151 | m_data.SetByteOrder(target->GetArchitecture().GetByteOrder()); |
| 152 | m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize()); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 153 | } |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 154 | |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 155 | if (expr.IsLocationList()) |
| 156 | { |
| 157 | SymbolContext sc; |
| 158 | variable->CalculateSymbolContext (&sc); |
| 159 | if (sc.function) |
Greg Clayton | 567e7f3 | 2011-09-22 04:58:26 +0000 | [diff] [blame] | 160 | loclist_base_load_addr = sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (target); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 161 | } |
| 162 | Value old_value(m_value); |
| 163 | if (expr.Evaluate (&exe_ctx, GetClangAST(), NULL, NULL, NULL, loclist_base_load_addr, NULL, m_value, &m_error)) |
| 164 | { |
| 165 | m_value.SetContext(Value::eContextTypeVariable, variable); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 166 | |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 167 | Value::ValueType value_type = m_value.GetValueType(); |
Enrico Granata | 9154480 | 2011-09-06 19:20:51 +0000 | [diff] [blame] | 168 | |
| 169 | switch (value_type) |
| 170 | { |
| 171 | case Value::eValueTypeFileAddress: |
| 172 | SetAddressTypeOfChildren(eAddressTypeFile); |
| 173 | break; |
| 174 | case Value::eValueTypeHostAddress: |
| 175 | SetAddressTypeOfChildren(eAddressTypeHost); |
| 176 | break; |
| 177 | case Value::eValueTypeLoadAddress: |
Enrico Granata | 9154480 | 2011-09-06 19:20:51 +0000 | [diff] [blame] | 178 | case Value::eValueTypeScalar: |
Greg Clayton | 7c5e22f | 2012-10-30 18:18:43 +0000 | [diff] [blame] | 179 | case Value::eValueTypeVector: |
Greg Clayton | 05e3b9e | 2011-10-01 01:53:20 +0000 | [diff] [blame] | 180 | SetAddressTypeOfChildren(eAddressTypeLoad); |
Enrico Granata | 9154480 | 2011-09-06 19:20:51 +0000 | [diff] [blame] | 181 | break; |
| 182 | } |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 183 | |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 184 | switch (value_type) |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 185 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 186 | default: |
| 187 | assert(!"Unhandled expression result value kind..."); |
| 188 | break; |
| 189 | |
| 190 | case Value::eValueTypeScalar: |
| 191 | // The variable value is in the Scalar value inside the m_value. |
| 192 | // We can point our m_data right to it. |
Greg Clayton | 3508c38 | 2012-02-24 01:59:29 +0000 | [diff] [blame] | 193 | m_error = m_value.GetValueAsData (&exe_ctx, GetClangAST(), m_data, 0, GetModule().get()); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 194 | break; |
| 195 | |
| 196 | case Value::eValueTypeFileAddress: |
| 197 | case Value::eValueTypeLoadAddress: |
| 198 | case Value::eValueTypeHostAddress: |
| 199 | // The DWARF expression result was an address in the inferior |
| 200 | // process. If this variable is an aggregate type, we just need |
| 201 | // the address as the main value as all child variable objects |
| 202 | // will rely upon this location and add an offset and then read |
| 203 | // their own values as needed. If this variable is a simple |
| 204 | // type, we read all data for it into m_data. |
| 205 | // Make sure this type has a value before we try and read it |
| 206 | |
| 207 | // If we have a file address, convert it to a load address if we can. |
Greg Clayton | 567e7f3 | 2011-09-22 04:58:26 +0000 | [diff] [blame] | 208 | Process *process = exe_ctx.GetProcessPtr(); |
| 209 | if (value_type == Value::eValueTypeFileAddress && process && process->IsAlive()) |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 210 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 211 | lldb::addr_t file_addr = m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS); |
| 212 | if (file_addr != LLDB_INVALID_ADDRESS) |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 213 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 214 | SymbolContext var_sc; |
| 215 | variable->CalculateSymbolContext(&var_sc); |
| 216 | if (var_sc.module_sp) |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 217 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 218 | ObjectFile *objfile = var_sc.module_sp->GetObjectFile(); |
| 219 | if (objfile) |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 220 | { |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 221 | Address so_addr(file_addr, objfile->GetSectionList()); |
Greg Clayton | 567e7f3 | 2011-09-22 04:58:26 +0000 | [diff] [blame] | 222 | lldb::addr_t load_addr = so_addr.GetLoadAddress (target); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 223 | if (load_addr != LLDB_INVALID_ADDRESS) |
| 224 | { |
| 225 | m_value.SetValueType(Value::eValueTypeLoadAddress); |
| 226 | m_value.GetScalar() = load_addr; |
| 227 | } |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 228 | } |
| 229 | } |
| 230 | } |
| 231 | } |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 232 | |
| 233 | if (ClangASTContext::IsAggregateType (GetClangType())) |
| 234 | { |
| 235 | // this value object represents an aggregate type whose |
| 236 | // children have values, but this object does not. So we |
| 237 | // say we are changed if our location has changed. |
| 238 | SetValueDidChange (value_type != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar()); |
| 239 | } |
| 240 | else |
| 241 | { |
| 242 | // Copy the Value and set the context to use our Variable |
| 243 | // so it can extract read its value into m_data appropriately |
| 244 | Value value(m_value); |
| 245 | value.SetContext(Value::eContextTypeVariable, variable); |
Greg Clayton | 3508c38 | 2012-02-24 01:59:29 +0000 | [diff] [blame] | 246 | m_error = value.GetValueAsData(&exe_ctx, GetClangAST(), m_data, 0, GetModule().get()); |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 247 | } |
| 248 | break; |
Greg Clayton | aed5881 | 2010-09-13 02:37:44 +0000 | [diff] [blame] | 249 | } |
| 250 | |
Greg Clayton | 82f0746 | 2011-05-30 00:49:24 +0000 | [diff] [blame] | 251 | SetValueIsValid (m_error.Success()); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 252 | } |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 253 | } |
Jim Ingham | fa3a16a | 2011-03-31 00:19:25 +0000 | [diff] [blame] | 254 | return m_error.Success(); |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | |
| 258 | |
| 259 | bool |
Jim Ingham | fa3a16a | 2011-03-31 00:19:25 +0000 | [diff] [blame] | 260 | ValueObjectVariable::IsInScope () |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 261 | { |
Greg Clayton | b4d7fc0 | 2012-02-17 07:49:44 +0000 | [diff] [blame] | 262 | const ExecutionContextRef &exe_ctx_ref = GetExecutionContextRef(); |
| 263 | if (exe_ctx_ref.HasFrameRef()) |
| 264 | { |
| 265 | ExecutionContext exe_ctx (exe_ctx_ref); |
| 266 | StackFrame *frame = exe_ctx.GetFramePtr(); |
| 267 | if (frame) |
| 268 | { |
| 269 | return m_variable_sp->IsInScope (frame); |
| 270 | } |
| 271 | else |
| 272 | { |
| 273 | // This ValueObject had a frame at one time, but now we |
| 274 | // can't locate it, so return false since we probably aren't |
| 275 | // in scope. |
| 276 | return false; |
| 277 | } |
| 278 | } |
| 279 | // We have a variable that wasn't tied to a frame, which |
| 280 | // means it is a global and is always in scope. |
| 281 | return true; |
Jim Ingham | fa3a16a | 2011-03-31 00:19:25 +0000 | [diff] [blame] | 282 | |
Chris Lattner | 24943d2 | 2010-06-08 16:52:24 +0000 | [diff] [blame] | 283 | } |
| 284 | |
Greg Clayton | 3508c38 | 2012-02-24 01:59:29 +0000 | [diff] [blame] | 285 | lldb::ModuleSP |
Greg Clayton | 801417e | 2011-07-07 01:59:51 +0000 | [diff] [blame] | 286 | ValueObjectVariable::GetModule() |
| 287 | { |
| 288 | if (m_variable_sp) |
| 289 | { |
| 290 | SymbolContextScope *sc_scope = m_variable_sp->GetSymbolContextScope(); |
| 291 | if (sc_scope) |
| 292 | { |
Greg Clayton | 3508c38 | 2012-02-24 01:59:29 +0000 | [diff] [blame] | 293 | return sc_scope->CalculateSymbolContextModule(); |
Greg Clayton | 801417e | 2011-07-07 01:59:51 +0000 | [diff] [blame] | 294 | } |
| 295 | } |
Greg Clayton | 3508c38 | 2012-02-24 01:59:29 +0000 | [diff] [blame] | 296 | return lldb::ModuleSP(); |
Greg Clayton | 801417e | 2011-07-07 01:59:51 +0000 | [diff] [blame] | 297 | } |
| 298 | |
Enrico Granata | 9154480 | 2011-09-06 19:20:51 +0000 | [diff] [blame] | 299 | SymbolContextScope * |
| 300 | ValueObjectVariable::GetSymbolContextScope() |
| 301 | { |
| 302 | if (m_variable_sp) |
| 303 | return m_variable_sp->GetSymbolContextScope(); |
| 304 | return NULL; |
| 305 | } |
Greg Clayton | 0a19a1b | 2012-02-04 02:27:34 +0000 | [diff] [blame] | 306 | |
| 307 | bool |
| 308 | ValueObjectVariable::GetDeclaration (Declaration &decl) |
| 309 | { |
| 310 | if (m_variable_sp) |
| 311 | { |
| 312 | decl = m_variable_sp->GetDeclaration(); |
| 313 | return true; |
| 314 | } |
| 315 | return false; |
| 316 | } |