forked from OSchip/llvm-project
520 lines
16 KiB
C++
520 lines
16 KiB
C++
//===-- LibCxx.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/lldb-python.h"
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#include "lldb/DataFormatters/CXXFormatterFunctions.h"
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Core/ValueObjectConstResult.h"
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#include "lldb/Host/Endian.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::formatters;
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::LibcxxVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
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SyntheticChildrenFrontEnd(*valobj_sp.get()),
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m_exe_ctx_ref(),
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m_count(0),
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m_base_data_address(0),
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m_options()
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{
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if (valobj_sp)
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Update();
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m_options.SetCoerceToId(false)
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.SetUnwindOnError(true)
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.SetKeepInMemory(true)
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.SetUseDynamic(lldb::eDynamicCanRunTarget);
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}
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size_t
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
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{
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return m_count;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
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{
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if (idx >= m_count)
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return ValueObjectSP();
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if (m_base_data_address == 0 || m_count == 0)
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return ValueObjectSP();
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size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
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size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
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lldb::addr_t byte_location = m_base_data_address + byte_idx;
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ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
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if (!process_sp)
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return ValueObjectSP();
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uint8_t byte = 0;
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uint8_t mask = 0;
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Error err;
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size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
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if (err.Fail() || bytes_read == 0)
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return ValueObjectSP();
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switch (bit_index)
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{
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case 0:
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mask = 1; break;
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case 1:
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mask = 2; break;
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case 2:
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mask = 4; break;
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case 3:
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mask = 8; break;
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case 4:
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mask = 16; break;
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case 5:
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mask = 32; break;
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case 6:
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mask = 64; break;
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case 7:
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mask = 128; break;
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default:
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return ValueObjectSP();
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}
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bool bit_set = ((byte & mask) != 0);
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Target& target(process_sp->GetTarget());
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ValueObjectSP retval_sp;
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if (bit_set)
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target.EvaluateExpression("(bool)true", NULL, retval_sp);
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else
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target.EvaluateExpression("(bool)false", NULL, retval_sp);
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StreamString name; name.Printf("[%zu]",idx);
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if (retval_sp)
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retval_sp->SetName(ConstString(name.GetData()));
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return retval_sp;
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}
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/*(std::__1::vector<std::__1::allocator<bool> >) vBool = {
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__begin_ = 0x00000001001000e0
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__size_ = 56
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__cap_alloc_ = {
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std::__1::__libcpp_compressed_pair_imp<unsigned long, std::__1::allocator<unsigned long> > = {
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__first_ = 1
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}
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}
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}*/
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bool
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::Update()
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{
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ValueObjectSP valobj_sp = m_backend.GetSP();
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if (!valobj_sp)
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return false;
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if (!valobj_sp)
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return false;
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m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
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ValueObjectSP size_sp(valobj_sp->GetChildMemberWithName(ConstString("__size_"), true));
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if (!size_sp)
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return false;
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m_count = size_sp->GetValueAsUnsigned(0);
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if (!m_count)
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return true;
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ValueObjectSP begin_sp(valobj_sp->GetChildMemberWithName(ConstString("__begin_"), true));
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if (!begin_sp)
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{
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m_count = 0;
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return false;
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}
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m_base_data_address = begin_sp->GetValueAsUnsigned(0);
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if (!m_base_data_address)
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{
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m_count = 0;
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return false;
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}
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return false;
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}
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bool
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::MightHaveChildren ()
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{
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return true;
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}
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size_t
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
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{
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if (!m_count || !m_base_data_address)
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return UINT32_MAX;
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const char* item_name = name.GetCString();
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uint32_t idx = ExtractIndexFromString(item_name);
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if (idx < UINT32_MAX && idx >= CalculateNumChildren())
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return UINT32_MAX;
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return idx;
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}
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::~LibcxxVectorBoolSyntheticFrontEnd ()
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{}
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SyntheticChildrenFrontEnd*
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lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
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{
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if (!valobj_sp)
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return NULL;
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return (new LibcxxVectorBoolSyntheticFrontEnd(valobj_sp));
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}
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/*
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(lldb) fr var ibeg --raw --ptr-depth 1
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(std::__1::__map_iterator<std::__1::__tree_iterator<std::__1::pair<int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::__tree_node<std::__1::pair<int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, void *> *, long> >) ibeg = {
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__i_ = {
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__ptr_ = 0x0000000100103870 {
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std::__1::__tree_node_base<void *> = {
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std::__1::__tree_end_node<std::__1::__tree_node_base<void *> *> = {
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__left_ = 0x0000000000000000
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}
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__right_ = 0x0000000000000000
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__parent_ = 0x00000001001038b0
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__is_black_ = true
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}
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__value_ = {
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first = 0
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second = { std::string }
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*/
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::LibCxxMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
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SyntheticChildrenFrontEnd(*valobj_sp.get()),
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m_pair_ptr()
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{
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if (valobj_sp)
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Update();
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}
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bool
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::Update()
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{
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ValueObjectSP valobj_sp = m_backend.GetSP();
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if (!valobj_sp)
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return false;
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TargetSP target_sp(valobj_sp->GetTargetSP());
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if (!target_sp)
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return false;
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if (!valobj_sp)
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return false;
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// this must be a ValueObject* because it is a child of the ValueObject we are producing children for
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// it if were a ValueObjectSP, we would end up with a loop (iterator -> synthetic -> child -> parent == iterator)
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// and that would in turn leak memory by never allowing the ValueObjects to die and free their memory
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m_pair_ptr = valobj_sp->GetValueForExpressionPath(".__i_.__ptr_->__value_",
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NULL,
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NULL,
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NULL,
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ValueObject::GetValueForExpressionPathOptions().DontCheckDotVsArrowSyntax().DontAllowSyntheticChildren(),
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NULL).get();
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return false;
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}
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size_t
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::CalculateNumChildren ()
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{
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return 2;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
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{
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if (!m_pair_ptr)
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return lldb::ValueObjectSP();
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return m_pair_ptr->GetChildAtIndex(idx, true);
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}
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bool
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::MightHaveChildren ()
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{
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return true;
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}
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size_t
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
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{
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if (name == ConstString("first"))
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return 0;
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if (name == ConstString("second"))
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return 1;
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return UINT32_MAX;
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}
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::~LibCxxMapIteratorSyntheticFrontEnd ()
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{
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// this will be deleted when its parent dies (since it's a child object)
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//delete m_pair_ptr;
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}
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SyntheticChildrenFrontEnd*
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lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
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{
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if (!valobj_sp)
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return NULL;
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return (new LibCxxMapIteratorSyntheticFrontEnd(valobj_sp));
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}
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/*
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(lldb) fr var ibeg --raw --ptr-depth 1 -T
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(std::__1::__wrap_iter<int *>) ibeg = {
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(std::__1::__wrap_iter<int *>::iterator_type) __i = 0x00000001001037a0 {
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(int) *__i = 1
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}
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}
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*/
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SyntheticChildrenFrontEnd*
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lldb_private::formatters::LibCxxVectorIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
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{
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static ConstString g_item_name;
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if (!g_item_name)
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g_item_name.SetCString("__i");
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if (!valobj_sp)
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return NULL;
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return (new VectorIteratorSyntheticFrontEnd(valobj_sp,g_item_name));
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}
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::LibcxxSharedPtrSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
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SyntheticChildrenFrontEnd(*valobj_sp.get()),
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m_cntrl(NULL),
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m_count_sp(),
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m_weak_count_sp(),
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m_ptr_size(0),
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m_byte_order(lldb::eByteOrderInvalid)
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{
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if (valobj_sp)
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Update();
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}
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size_t
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::CalculateNumChildren ()
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{
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return (m_cntrl ? 1 : 0);
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetChildAtIndex (size_t idx)
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{
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if (!m_cntrl)
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return lldb::ValueObjectSP();
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ValueObjectSP valobj_sp = m_backend.GetSP();
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if (!valobj_sp)
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return lldb::ValueObjectSP();
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if (idx == 0)
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return valobj_sp->GetChildMemberWithName(ConstString("__ptr_"), true);
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if (idx > 2)
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return lldb::ValueObjectSP();
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if (idx == 1)
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{
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if (!m_count_sp)
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{
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ValueObjectSP shared_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_owners_"),true));
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if (!shared_owners_sp)
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return lldb::ValueObjectSP();
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uint64_t count = 1 + shared_owners_sp->GetValueAsUnsigned(0);
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DataExtractor data(&count, 8, m_byte_order, m_ptr_size);
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m_count_sp = ValueObject::CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_owners_sp->GetClangType());
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}
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return m_count_sp;
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}
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else /* if (idx == 2) */
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{
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if (!m_weak_count_sp)
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{
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ValueObjectSP shared_weak_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_weak_owners_"),true));
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if (!shared_weak_owners_sp)
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return lldb::ValueObjectSP();
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uint64_t count = 1 + shared_weak_owners_sp->GetValueAsUnsigned(0);
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DataExtractor data(&count, 8, m_byte_order, m_ptr_size);
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m_weak_count_sp = ValueObject::CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_weak_owners_sp->GetClangType());
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}
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return m_weak_count_sp;
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}
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}
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bool
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::Update()
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{
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m_count_sp.reset();
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m_weak_count_sp.reset();
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m_cntrl = NULL;
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ValueObjectSP valobj_sp = m_backend.GetSP();
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if (!valobj_sp)
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return false;
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TargetSP target_sp(valobj_sp->GetTargetSP());
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if (!target_sp)
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return false;
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m_byte_order = target_sp->GetArchitecture().GetByteOrder();
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m_ptr_size = target_sp->GetArchitecture().GetAddressByteSize();
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lldb::ValueObjectSP cntrl_sp(valobj_sp->GetChildMemberWithName(ConstString("__cntrl_"),true));
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m_cntrl = cntrl_sp.get(); // need to store the raw pointer to avoid a circular dependency
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return false;
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}
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bool
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::MightHaveChildren ()
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{
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return true;
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}
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size_t
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
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{
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if (name == ConstString("__ptr_"))
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return 0;
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if (name == ConstString("count"))
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return 1;
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if (name == ConstString("weak_count"))
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return 2;
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return UINT32_MAX;
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}
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::~LibcxxSharedPtrSyntheticFrontEnd ()
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{}
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SyntheticChildrenFrontEnd*
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lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
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{
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if (!valobj_sp)
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return NULL;
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return (new LibcxxSharedPtrSyntheticFrontEnd(valobj_sp));
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}
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::LibcxxStdVectorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
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SyntheticChildrenFrontEnd(*valobj_sp.get()),
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m_start(NULL),
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m_finish(NULL),
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m_element_type(),
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m_element_size(0),
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m_children()
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{
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if (valobj_sp)
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Update();
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}
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size_t
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::CalculateNumChildren ()
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{
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if (!m_start || !m_finish)
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return 0;
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uint64_t start_val = m_start->GetValueAsUnsigned(0);
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uint64_t finish_val = m_finish->GetValueAsUnsigned(0);
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if (start_val == 0 || finish_val == 0)
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return 0;
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if (start_val >= finish_val)
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return 0;
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size_t num_children = (finish_val - start_val);
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if (num_children % m_element_size)
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return 0;
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return num_children/m_element_size;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
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{
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if (!m_start || !m_finish)
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return lldb::ValueObjectSP();
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auto cached = m_children.find(idx);
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if (cached != m_children.end())
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return cached->second;
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uint64_t offset = idx * m_element_size;
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offset = offset + m_start->GetValueAsUnsigned(0);
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StreamString name;
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name.Printf("[%zu]",idx);
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ValueObjectSP child_sp = ValueObject::CreateValueObjectFromAddress(name.GetData(), offset, m_backend.GetExecutionContextRef(), m_element_type);
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m_children[idx] = child_sp;
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return child_sp;
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}
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bool
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::Update()
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{
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m_start = m_finish = NULL;
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m_children.clear();
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ValueObjectSP data_type_finder_sp(m_backend.GetChildMemberWithName(ConstString("__end_cap_"),true));
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if (!data_type_finder_sp)
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return false;
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data_type_finder_sp = data_type_finder_sp->GetChildMemberWithName(ConstString("__first_"),true);
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if (!data_type_finder_sp)
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return false;
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m_element_type = data_type_finder_sp->GetClangType().GetPointeeType();
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m_element_size = m_element_type.GetByteSize();
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if (m_element_size > 0)
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{
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// store raw pointers or end up with a circular dependency
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m_start = m_backend.GetChildMemberWithName(ConstString("__begin_"),true).get();
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m_finish = m_backend.GetChildMemberWithName(ConstString("__end_"),true).get();
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}
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return false;
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}
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bool
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::MightHaveChildren ()
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{
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return true;
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}
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size_t
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
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{
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if (!m_start || !m_finish)
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return UINT32_MAX;
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return ExtractIndexFromString(name.GetCString());
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}
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lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::~LibcxxStdVectorSyntheticFrontEnd ()
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{
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// these need to stay around because they are child objects who will follow their parent's life cycle
|
|
// delete m_start;
|
|
// delete m_finish;
|
|
}
|
|
|
|
SyntheticChildrenFrontEnd*
|
|
lldb_private::formatters::LibcxxStdVectorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
|
|
{
|
|
if (!valobj_sp)
|
|
return NULL;
|
|
return (new LibcxxStdVectorSyntheticFrontEnd(valobj_sp));
|
|
}
|
|
|
|
bool
|
|
lldb_private::formatters::LibcxxContainerSummaryProvider (ValueObject& valobj, Stream& stream)
|
|
{
|
|
if (valobj.IsPointerType())
|
|
{
|
|
uint64_t value = valobj.GetValueAsUnsigned(0);
|
|
if (!value)
|
|
return false;
|
|
stream.Printf("0x%016" PRIx64 " ", value);
|
|
}
|
|
return Debugger::FormatPrompt("size=${svar%#}", NULL, NULL, NULL, stream, &valobj);
|
|
}
|