forked from OSchip/llvm-project
112 lines
3.6 KiB
C++
112 lines
3.6 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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#include "lldb/Target/StackID.h"
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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/Core/Stream.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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using namespace lldb_private;
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void
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StackID::Dump (Stream *s)
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{
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s->Printf("StackID (pc = 0x%16.16" PRIx64 ", cfa = 0x%16.16" PRIx64 ", 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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{
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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
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lldb_private::operator== (const StackID& lhs, const StackID& rhs)
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{
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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 NULL
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if (lhs_scope == NULL && rhs_scope == NULL)
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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
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lldb_private::operator!= (const StackID& lhs, const StackID& rhs)
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{
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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 == NULL && rhs_scope == NULL)
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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
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lldb_private::operator< (const StackID& lhs, const StackID& rhs)
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{
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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 necessary, but true on
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// all the machines we care about at present. If this changes, we'll have to 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. The most straightforward way
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// to handle this is to add a "m_grows_downward" bool to the StackID, and set 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 != NULL && rhs_scope != NULL)
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{
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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 &&
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lhs_sc.function != NULL && lhs_sc.block != NULL &&
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rhs_sc.function != NULL && rhs_sc.block != NULL)
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{
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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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