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bf9a77305f
This moves the following classes from Core -> Utility. ConstString Error RegularExpression Stream StreamString The goal here is to get lldbUtility into a state where it has no dependendencies except on itself and LLVM, so it can be the starting point at which to start untangling LLDB's dependencies. These are all low level and very widely used classes, and previously lldbUtility had dependencies up to lldbCore in order to use these classes. So moving then down to lldbUtility makes sense from both the short term and long term perspective in solving this problem. Differential Revision: https://reviews.llvm.org/D29427 llvm-svn: 293941
104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
//===-- StackID.cpp ---------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Target/StackID.h"
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#include "lldb/Symbol/Block.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Utility/Stream.h"
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using namespace lldb_private;
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void StackID::Dump(Stream *s) {
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s->Printf("StackID (pc = 0x%16.16" PRIx64 ", cfa = 0x%16.16" PRIx64
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", symbol_scope = %p",
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m_pc, m_cfa, static_cast<void *>(m_symbol_scope));
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if (m_symbol_scope) {
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SymbolContext sc;
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m_symbol_scope->CalculateSymbolContext(&sc);
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if (sc.block)
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s->Printf(" (Block {0x%8.8" PRIx64 "})", sc.block->GetID());
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else if (sc.symbol)
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s->Printf(" (Symbol{0x%8.8x})", sc.symbol->GetID());
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}
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s->PutCString(") ");
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}
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bool lldb_private::operator==(const StackID &lhs, const StackID &rhs) {
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if (lhs.GetCallFrameAddress() != rhs.GetCallFrameAddress())
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return false;
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SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
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SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
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// Only compare the PC values if both symbol context scopes are nullptr
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if (lhs_scope == nullptr && rhs_scope == nullptr)
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return lhs.GetPC() == rhs.GetPC();
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return lhs_scope == rhs_scope;
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}
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bool lldb_private::operator!=(const StackID &lhs, const StackID &rhs) {
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if (lhs.GetCallFrameAddress() != rhs.GetCallFrameAddress())
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return true;
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SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
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SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
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if (lhs_scope == nullptr && rhs_scope == nullptr)
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return lhs.GetPC() != rhs.GetPC();
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return lhs_scope != rhs_scope;
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}
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bool lldb_private::operator<(const StackID &lhs, const StackID &rhs) {
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const lldb::addr_t lhs_cfa = lhs.GetCallFrameAddress();
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const lldb::addr_t rhs_cfa = rhs.GetCallFrameAddress();
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// FIXME: We are assuming that the stacks grow downward in memory. That's not
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// necessary, but true on
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// all the machines we care about at present. If this changes, we'll have to
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// deal with that. The ABI is the
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// agent who knows this ordering, but the StackID has no access to the ABI.
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// The most straightforward way
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// to handle this is to add a "m_grows_downward" bool to the StackID, and set
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// it in the constructor.
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// But I'm not going to waste a bool per StackID on this till we need it.
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if (lhs_cfa != rhs_cfa)
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return lhs_cfa < rhs_cfa;
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SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
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SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
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if (lhs_scope != nullptr && rhs_scope != nullptr) {
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// Same exact scope, lhs is not less than (younger than rhs)
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if (lhs_scope == rhs_scope)
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return false;
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SymbolContext lhs_sc;
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SymbolContext rhs_sc;
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lhs_scope->CalculateSymbolContext(&lhs_sc);
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rhs_scope->CalculateSymbolContext(&rhs_sc);
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// Items with the same function can only be compared
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if (lhs_sc.function == rhs_sc.function && lhs_sc.function != nullptr &&
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lhs_sc.block != nullptr && rhs_sc.function != nullptr &&
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rhs_sc.block != nullptr) {
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return rhs_sc.block->Contains(lhs_sc.block);
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}
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}
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return false;
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}
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