LLDB mainline
StackID.cpp
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1//===-- StackID.cpp -------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
10#include "lldb/Symbol/Block.h"
11#include "lldb/Symbol/Symbol.h"
13#include "lldb/Utility/Stream.h"
14
15using namespace lldb_private;
16
18 s->Printf("StackID (pc = 0x%16.16" PRIx64 ", cfa = 0x%16.16" PRIx64
19 ", symbol_scope = %p",
20 m_pc, m_cfa, static_cast<void *>(m_symbol_scope));
21 if (m_symbol_scope) {
23
25 if (sc.block)
26 s->Printf(" (Block {0x%8.8" PRIx64 "})", sc.block->GetID());
27 else if (sc.symbol)
28 s->Printf(" (Symbol{0x%8.8x})", sc.symbol->GetID());
29 }
30 s->PutCString(") ");
31}
32
33bool lldb_private::operator==(const StackID &lhs, const StackID &rhs) {
35 return false;
36
39
40 // Only compare the PC values if both symbol context scopes are nullptr
41 if (lhs_scope == nullptr && rhs_scope == nullptr)
42 return lhs.GetPC() == rhs.GetPC();
43
44 return lhs_scope == rhs_scope;
45}
46
47bool lldb_private::operator!=(const StackID &lhs, const StackID &rhs) {
49 return true;
50
53
54 if (lhs_scope == nullptr && rhs_scope == nullptr)
55 return lhs.GetPC() != rhs.GetPC();
56
57 return lhs_scope != rhs_scope;
58}
59
60bool lldb_private::operator<(const StackID &lhs, const StackID &rhs) {
61 const lldb::addr_t lhs_cfa = lhs.GetCallFrameAddress();
62 const lldb::addr_t rhs_cfa = rhs.GetCallFrameAddress();
63
64 // FIXME: We are assuming that the stacks grow downward in memory. That's not
65 // necessary, but true on
66 // all the machines we care about at present. If this changes, we'll have to
67 // deal with that. The ABI is the agent who knows this ordering, but the
68 // StackID has no access to the ABI. The most straightforward way to handle
69 // this is to add a "m_grows_downward" bool to the StackID, and set it in the
70 // constructor. But I'm not going to waste a bool per StackID on this till we
71 // need it.
72
73 if (lhs_cfa != rhs_cfa)
74 return lhs_cfa < rhs_cfa;
75
78
79 if (lhs_scope != nullptr && rhs_scope != nullptr) {
80 // Same exact scope, lhs is not less than (younger than rhs)
81 if (lhs_scope == rhs_scope)
82 return false;
83
84 SymbolContext lhs_sc;
85 SymbolContext rhs_sc;
86 lhs_scope->CalculateSymbolContext(&lhs_sc);
87 rhs_scope->CalculateSymbolContext(&rhs_sc);
88
89 // Items with the same function can only be compared
90 if (lhs_sc.function == rhs_sc.function && lhs_sc.function != nullptr &&
91 lhs_sc.block != nullptr && rhs_sc.function != nullptr &&
92 rhs_sc.block != nullptr) {
93 return rhs_sc.block->Contains(lhs_sc.block);
94 }
95 }
96 return false;
97}
bool Contains(lldb::addr_t range_offset) const
Check if an offset is in one of the block offset ranges.
Definition: Block.cpp:180
void Dump(Stream *s)
Definition: StackID.cpp:17
lldb::addr_t m_cfa
Definition: StackID.h:76
SymbolContextScope * GetSymbolContextScope() const
Definition: StackID.h:35
lldb::addr_t m_pc
Definition: StackID.h:70
lldb::addr_t GetPC() const
Definition: StackID.h:31
SymbolContextScope * m_symbol_scope
Definition: StackID.h:81
lldb::addr_t GetCallFrameAddress() const
Definition: StackID.h:33
A stream class that can stream formatted output to a file.
Definition: Stream.h:28
size_t Printf(const char *format,...) __attribute__((format(printf
Output printf formatted output to the stream.
Definition: Stream.cpp:134
size_t PutCString(llvm::StringRef cstr)
Output a C string to the stream.
Definition: Stream.cpp:65
"lldb/Symbol/SymbolContextScope.h" Inherit from this if your object is part of a symbol context and c...
virtual void CalculateSymbolContext(SymbolContext *sc)=0
Reconstruct the object's symbol context into sc.
Defines a symbol context baton that can be handed other debug core functions.
Definition: SymbolContext.h:34
Function * function
The Function for a given query.
Block * block
The Block for a given query.
Symbol * symbol
The Symbol for a given query.
uint32_t GetID() const
Definition: Symbol.h:136
A class that represents a running process on the host machine.
bool operator!=(const Address &lhs, const Address &rhs)
Definition: Address.cpp:1029
bool operator==(const Address &lhs, const Address &rhs)
Definition: Address.cpp:1023
bool operator<(const Address &lhs, const Address &rhs)
Definition: Address.cpp:992
uint64_t addr_t
Definition: lldb-types.h:80
lldb::user_id_t GetID() const
Get accessor for the user ID.
Definition: UserID.h:47