1 //===-- Block.h -------------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef liblldb_Block_h_
11 #define liblldb_Block_h_
17 // Other libraries and framework includes
19 #include "lldb/Core/AddressRange.h"
20 #include "lldb/Core/RangeMap.h"
21 #include "lldb/Symbol/CompilerType.h"
22 #include "lldb/Symbol/LineEntry.h"
23 #include "lldb/Symbol/SymbolContext.h"
24 #include "lldb/Symbol/SymbolContextScope.h"
25 #include "lldb/Utility/Stream.h"
26 #include "lldb/Utility/UserID.h"
27 #include "lldb/lldb-private.h"
29 namespace lldb_private {
31 //----------------------------------------------------------------------
32 /// @class Block Block.h "lldb/Symbol/Block.h"
33 /// A class that describes a single lexical block.
35 /// A Function object owns a BlockList object which owns one or more
36 /// Block objects. The BlockList object contains a section offset address
37 /// range, and Block objects contain one or more ranges which are offsets into
38 /// that range. Blocks are can have discontiguous ranges within the BlockList
39 /// address range, and each block can contain child blocks each with their own
42 /// Each block has a variable list that represents local, argument, and static
43 /// variables that are scoped to the block.
45 /// Inlined functions are represented by attaching a InlineFunctionInfo shared
46 /// pointer object to a block. Inlined functions are represented as named
48 //----------------------------------------------------------------------
49 class Block : public UserID, public SymbolContextScope {
51 typedef RangeArray<uint32_t, uint32_t, 1> RangeList;
52 typedef RangeList::Entry Range;
54 //------------------------------------------------------------------
55 /// Construct with a User ID \a uid, \a depth.
57 /// Initialize this block with the specified UID \a uid. The \a depth in the
58 /// \a block_list is used to represent the parent, sibling, and child block
59 /// information and also allows for partial parsing at the block level.
62 /// The UID for a given block. This value is given by the
63 /// SymbolFile plug-in and can be any value that helps the
64 /// SymbolFile plug-in to match this block back to the debug
65 /// information data that it parses for further or more in
66 /// depth parsing. Common values would be the index into a
67 /// table, or an offset into the debug information.
70 /// The integer depth of this block in the block list hierarchy.
72 /// @param[in] block_list
73 /// The block list that this object belongs to.
76 //------------------------------------------------------------------
77 Block(lldb::user_id_t uid);
79 //------------------------------------------------------------------
81 //------------------------------------------------------------------
84 //------------------------------------------------------------------
85 /// Add a child to this object.
87 /// @param[in] child_block_sp
88 /// A shared pointer to a child block that will get added to
90 //------------------------------------------------------------------
91 void AddChild(const lldb::BlockSP &child_block_sp);
93 //------------------------------------------------------------------
94 /// Add a new offset range to this block.
96 /// @param[in] start_offset
97 /// An offset into this Function's address range that
98 /// describes the start address of a range for this block.
100 /// @param[in] end_offset
101 /// An offset into this Function's address range that
102 /// describes the end address of a range for this block.
103 //------------------------------------------------------------------
104 void AddRange(const Range &range);
106 void FinalizeRanges();
108 //------------------------------------------------------------------
109 /// @copydoc SymbolContextScope::CalculateSymbolContext(SymbolContext*)
111 /// @see SymbolContextScope
112 //------------------------------------------------------------------
113 void CalculateSymbolContext(SymbolContext *sc) override;
115 lldb::ModuleSP CalculateSymbolContextModule() override;
117 CompileUnit *CalculateSymbolContextCompileUnit() override;
119 Function *CalculateSymbolContextFunction() override;
121 Block *CalculateSymbolContextBlock() override;
123 //------------------------------------------------------------------
124 /// Check if an offset is in one of the block offset ranges.
126 /// @param[in] range_offset
127 /// An offset into the Function's address range.
130 /// Returns \b true if \a range_offset falls in one of this
131 /// block's ranges, \b false otherwise.
132 //------------------------------------------------------------------
133 bool Contains(lldb::addr_t range_offset) const;
135 //------------------------------------------------------------------
136 /// Check if a offset range is in one of the block offset ranges.
139 /// An offset range into the Function's address range.
142 /// Returns \b true if \a range falls in one of this
143 /// block's ranges, \b false otherwise.
144 //------------------------------------------------------------------
145 bool Contains(const Range &range) const;
147 //------------------------------------------------------------------
148 /// Check if this object contains "block" as a child block at any depth.
151 /// A potential child block.
154 /// Returns \b true if \a block is a child of this block, \b
156 //------------------------------------------------------------------
157 bool Contains(const Block *block) const;
159 //------------------------------------------------------------------
160 /// Dump the block contents.
163 /// The stream to which to dump the object description.
165 /// @param[in] base_addr
166 /// The resolved start address of the Function's address
167 /// range. This should be resolved as the file or load address
168 /// prior to passing the value into this function for dumping.
171 /// Limit the number of levels deep that this function should
172 /// print as this block can contain child blocks. Specify
173 /// INT_MAX to dump all child blocks.
175 /// @param[in] show_context
176 /// If \b true, variables will dump their context information.
177 //------------------------------------------------------------------
178 void Dump(Stream *s, lldb::addr_t base_addr, int32_t depth,
179 bool show_context) const;
181 //------------------------------------------------------------------
182 /// @copydoc SymbolContextScope::DumpSymbolContext(Stream*)
184 /// @see SymbolContextScope
185 //------------------------------------------------------------------
186 void DumpSymbolContext(Stream *s) override;
188 void DumpAddressRanges(Stream *s, lldb::addr_t base_addr);
190 void GetDescription(Stream *s, Function *function,
191 lldb::DescriptionLevel level, Target *target) const;
193 //------------------------------------------------------------------
194 /// Get the parent block.
197 /// The parent block pointer, or nullptr if this block has no
199 //------------------------------------------------------------------
200 Block *GetParent() const;
202 //------------------------------------------------------------------
203 /// Get the inlined block that contains this block.
206 /// If this block contains inlined function info, it will return
207 /// this block, else parent blocks will be searched to see if
208 /// any contain this block. nullptr will be returned if this block
209 /// nor any parent blocks are inlined function blocks.
210 //------------------------------------------------------------------
211 Block *GetContainingInlinedBlock();
213 //------------------------------------------------------------------
214 /// Get the inlined parent block for this block.
217 /// The parent block pointer, or nullptr if this block has no
219 //------------------------------------------------------------------
220 Block *GetInlinedParent();
222 //------------------------------------------------------------------
223 /// Get the sibling block for this block.
226 /// The sibling block pointer, or nullptr if this block has no
228 //------------------------------------------------------------------
229 Block *GetSibling() const;
231 //------------------------------------------------------------------
232 /// Get the first child block.
235 /// The first child block pointer, or nullptr if this block has no
237 //------------------------------------------------------------------
238 Block *GetFirstChild() const {
239 return (m_children.empty() ? nullptr : m_children.front().get());
242 //------------------------------------------------------------------
243 /// Get the variable list for this block only.
245 /// @param[in] can_create
246 /// If \b true, the variables can be parsed if they already
247 /// haven't been, else the current state of the block will be
251 /// A variable list shared pointer that contains all variables
253 //------------------------------------------------------------------
254 lldb::VariableListSP GetBlockVariableList(bool can_create);
256 //------------------------------------------------------------------
257 /// Get the variable list for this block and optionally all child blocks if
258 /// \a get_child_variables is \b true.
260 /// @param[in] get_child_variables
261 /// If \b true, all variables from all child blocks will be
262 /// added to the variable list.
264 /// @param[in] can_create
265 /// If \b true, the variables can be parsed if they already
266 /// haven't been, else the current state of the block will be
267 /// returned. Passing \b true for this parameter can be used
268 /// to see the current state of what has been parsed up to this
271 /// @param[in] add_inline_child_block_variables
272 /// If this is \b false, no child variables of child blocks
273 /// that are inlined functions will be gotten. If \b true then
274 /// all child variables will be added regardless of whether they
275 /// come from inlined functions or not.
278 /// A variable list shared pointer that contains all variables
280 //------------------------------------------------------------------
281 uint32_t AppendBlockVariables(bool can_create, bool get_child_block_variables,
282 bool stop_if_child_block_is_inlined_function,
283 const std::function<bool(Variable *)> &filter,
284 VariableList *variable_list);
286 //------------------------------------------------------------------
287 /// Appends the variables from this block, and optionally from all parent
288 /// blocks, to \a variable_list.
290 /// @param[in] can_create
291 /// If \b true, the variables can be parsed if they already
292 /// haven't been, else the current state of the block will be
293 /// returned. Passing \b true for this parameter can be used
294 /// to see the current state of what has been parsed up to this
297 /// @param[in] get_parent_variables
298 /// If \b true, all variables from all parent blocks will be
299 /// added to the variable list.
301 /// @param[in] stop_if_block_is_inlined_function
302 /// If \b true, all variables from all parent blocks will be
303 /// added to the variable list until there are no parent blocks
304 /// or the parent block has inlined function info.
306 /// @param[in,out] variable_list
307 /// All variables in this block, and optionally all parent
308 /// blocks will be added to this list.
311 /// The number of variable that were appended to \a
313 //------------------------------------------------------------------
314 uint32_t AppendVariables(bool can_create, bool get_parent_variables,
315 bool stop_if_block_is_inlined_function,
316 const std::function<bool(Variable *)> &filter,
317 VariableList *variable_list);
319 //------------------------------------------------------------------
320 /// Get const accessor for any inlined function information.
323 /// A const pointer to any inlined function information, or nullptr
324 /// if this is a regular block.
325 //------------------------------------------------------------------
326 const InlineFunctionInfo *GetInlinedFunctionInfo() const {
327 return m_inlineInfoSP.get();
330 CompilerDeclContext GetDeclContext();
332 //------------------------------------------------------------------
333 /// Get the memory cost of this object.
335 /// Returns the cost of this object plus any owned objects from the ranges,
336 /// variables, and inline function information.
339 /// The number of bytes that this object occupies in memory.
340 //------------------------------------------------------------------
341 size_t MemorySize() const;
343 //------------------------------------------------------------------
344 /// Set accessor for any inlined function information.
347 /// The method name for the inlined function. This value should
350 /// @param[in] mangled
351 /// The mangled method name for the inlined function. This can
352 /// be nullptr if there is no mangled name for an inlined function
353 /// or if the name is the same as \a name.
355 /// @param[in] decl_ptr
356 /// A optional pointer to declaration information for the
357 /// inlined function information. This value can be nullptr to
358 /// indicate that no declaration information is available.
360 /// @param[in] call_decl_ptr
361 /// Optional calling location declaration information that
362 /// describes from where this inlined function was called.
363 //------------------------------------------------------------------
364 void SetInlinedFunctionInfo(const char *name, const char *mangled,
365 const Declaration *decl_ptr,
366 const Declaration *call_decl_ptr);
368 void SetParentScope(SymbolContextScope *parent_scope) {
369 m_parent_scope = parent_scope;
372 //------------------------------------------------------------------
373 /// Set accessor for the variable list.
375 /// Called by the SymbolFile plug-ins after they have parsed the variable
376 /// lists and are ready to hand ownership of the list over to this object.
378 /// @param[in] variable_list_sp
379 /// A shared pointer to a VariableList.
380 //------------------------------------------------------------------
381 void SetVariableList(lldb::VariableListSP &variable_list_sp) {
382 m_variable_list_sp = variable_list_sp;
385 bool BlockInfoHasBeenParsed() const { return m_parsed_block_info; }
387 void SetBlockInfoHasBeenParsed(bool b, bool set_children);
389 Block *FindBlockByID(lldb::user_id_t block_id);
391 size_t GetNumRanges() const { return m_ranges.GetSize(); }
393 bool GetRangeContainingOffset(const lldb::addr_t offset, Range &range);
395 bool GetRangeContainingAddress(const Address &addr, AddressRange &range);
397 bool GetRangeContainingLoadAddress(lldb::addr_t load_addr, Target &target,
398 AddressRange &range);
400 uint32_t GetRangeIndexContainingAddress(const Address &addr);
402 //------------------------------------------------------------------
403 // Since blocks might have multiple discontiguous address ranges, we need to
404 // be able to get at any of the address ranges in a block.
405 //------------------------------------------------------------------
406 bool GetRangeAtIndex(uint32_t range_idx, AddressRange &range);
408 bool GetStartAddress(Address &addr);
410 void SetDidParseVariables(bool b, bool set_children);
413 typedef std::vector<lldb::BlockSP> collection;
414 //------------------------------------------------------------------
416 //------------------------------------------------------------------
417 SymbolContextScope *m_parent_scope;
418 collection m_children;
420 lldb::InlineFunctionInfoSP m_inlineInfoSP; ///< Inlined function information.
421 lldb::VariableListSP m_variable_list_sp; ///< The variable list for all local,
422 ///static and parameter variables
423 ///scoped to this block.
424 bool m_parsed_block_info : 1, ///< Set to true if this block and it's children
425 ///have all been parsed
426 m_parsed_block_variables : 1, m_parsed_child_blocks : 1;
428 // A parent of child blocks can be asked to find a sibling block given
429 // one of its child blocks
430 Block *GetSiblingForChild(const Block *child_block) const;
433 DISALLOW_COPY_AND_ASSIGN(Block);
436 } // namespace lldb_private
438 #endif // liblldb_Block_h_