You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.4 KiB
98 lines
3.4 KiB
4 months ago
|
//===-- StackID.cpp -------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "lldb/Target/StackID.h"
|
||
|
|
#include "lldb/Symbol/Block.h"
|
||
|
|
#include "lldb/Symbol/Symbol.h"
|
||
|
|
#include "lldb/Symbol/SymbolContext.h"
|
||
|
|
#include "lldb/Utility/Stream.h"
|
||
|
|
|
||
|
|
using namespace lldb_private;
|
||
|
|
|
||
|
|
void StackID::Dump(Stream *s) {
|
||
|
|
s->Printf("StackID (pc = 0x%16.16" PRIx64 ", cfa = 0x%16.16" PRIx64
|
||
|
|
", symbol_scope = %p",
|
||
|
|
m_pc, m_cfa, static_cast<void *>(m_symbol_scope));
|
||
|
|
if (m_symbol_scope) {
|
||
|
|
SymbolContext sc;
|
||
|
|
|
||
|
|
m_symbol_scope->CalculateSymbolContext(&sc);
|
||
|
|
if (sc.block)
|
||
|
|
s->Printf(" (Block {0x%8.8" PRIx64 "})", sc.block->GetID());
|
||
|
|
else if (sc.symbol)
|
||
|
|
s->Printf(" (Symbol{0x%8.8x})", sc.symbol->GetID());
|
||
|
|
}
|
||
|
|
s->PutCString(") ");
|
||
|
|
}
|
||
|
|
|
||
|
|
bool lldb_private::operator==(const StackID &lhs, const StackID &rhs) {
|
||
|
|
if (lhs.GetCallFrameAddress() != rhs.GetCallFrameAddress())
|
||
|
|
return false;
|
||
|
|
|
||
|
|
SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
|
||
|
|
SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
|
||
|
|
|
||
|
|
// Only compare the PC values if both symbol context scopes are nullptr
|
||
|
|
if (lhs_scope == nullptr && rhs_scope == nullptr)
|
||
|
|
return lhs.GetPC() == rhs.GetPC();
|
||
|
|
|
||
|
|
return lhs_scope == rhs_scope;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool lldb_private::operator!=(const StackID &lhs, const StackID &rhs) {
|
||
|
|
if (lhs.GetCallFrameAddress() != rhs.GetCallFrameAddress())
|
||
|
|
return true;
|
||
|
|
|
||
|
|
SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
|
||
|
|
SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
|
||
|
|
|
||
|
|
if (lhs_scope == nullptr && rhs_scope == nullptr)
|
||
|
|
return lhs.GetPC() != rhs.GetPC();
|
||
|
|
|
||
|
|
return lhs_scope != rhs_scope;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool lldb_private::operator<(const StackID &lhs, const StackID &rhs) {
|
||
|
|
const lldb::addr_t lhs_cfa = lhs.GetCallFrameAddress();
|
||
|
|
const lldb::addr_t rhs_cfa = rhs.GetCallFrameAddress();
|
||
|
|
|
||
|
|
// FIXME: We are assuming that the stacks grow downward in memory. That's not
|
||
|
|
// necessary, but true on
|
||
|
|
// all the machines we care about at present. If this changes, we'll have to
|
||
|
|
// deal with that. The ABI is the agent who knows this ordering, but the
|
||
|
|
// StackID has no access to the ABI. The most straightforward way to handle
|
||
|
|
// this is to add a "m_grows_downward" bool to the StackID, and set it in the
|
||
|
|
// constructor. But I'm not going to waste a bool per StackID on this till we
|
||
|
|
// need it.
|
||
|
|
|
||
|
|
if (lhs_cfa != rhs_cfa)
|
||
|
|
return lhs_cfa < rhs_cfa;
|
||
|
|
|
||
|
|
SymbolContextScope *lhs_scope = lhs.GetSymbolContextScope();
|
||
|
|
SymbolContextScope *rhs_scope = rhs.GetSymbolContextScope();
|
||
|
|
|
||
|
|
if (lhs_scope != nullptr && rhs_scope != nullptr) {
|
||
|
|
// Same exact scope, lhs is not less than (younger than rhs)
|
||
|
|
if (lhs_scope == rhs_scope)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
SymbolContext lhs_sc;
|
||
|
|
SymbolContext rhs_sc;
|
||
|
|
lhs_scope->CalculateSymbolContext(&lhs_sc);
|
||
|
|
rhs_scope->CalculateSymbolContext(&rhs_sc);
|
||
|
|
|
||
|
|
// Items with the same function can only be compared
|
||
|
|
if (lhs_sc.function == rhs_sc.function && lhs_sc.function != nullptr &&
|
||
|
|
lhs_sc.block != nullptr && rhs_sc.function != nullptr &&
|
||
|
|
rhs_sc.block != nullptr) {
|
||
|
|
return rhs_sc.block->Contains(lhs_sc.block);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|