diff options
Diffstat (limited to 'contrib/llvm/tools/lldb/source/DataFormatters/LibCxx.cpp')
| -rw-r--r-- | contrib/llvm/tools/lldb/source/DataFormatters/LibCxx.cpp | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/DataFormatters/LibCxx.cpp b/contrib/llvm/tools/lldb/source/DataFormatters/LibCxx.cpp new file mode 100644 index 000000000000..cdc57f6bd937 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/DataFormatters/LibCxx.cpp @@ -0,0 +1,519 @@ +//===-- LibCxx.cpp ----------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/lldb-python.h" + +#include "lldb/DataFormatters/CXXFormatterFunctions.h" + +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/Debugger.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/Stream.h" +#include "lldb/Core/ValueObject.h" +#include "lldb/Core/ValueObjectConstResult.h" +#include "lldb/Host/Endian.h" +#include "lldb/Symbol/ClangASTContext.h" +#include "lldb/Target/ObjCLanguageRuntime.h" +#include "lldb/Target/Target.h" + +using namespace lldb; +using namespace lldb_private; +using namespace lldb_private::formatters; + +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::LibcxxVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) : +SyntheticChildrenFrontEnd(*valobj_sp.get()), +m_exe_ctx_ref(), +m_count(0), +m_base_data_address(0), +m_options() +{ + if (valobj_sp) + Update(); + m_options.SetCoerceToId(false) + .SetUnwindOnError(true) + .SetKeepInMemory(true) + .SetUseDynamic(lldb::eDynamicCanRunTarget); +} + +size_t +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::CalculateNumChildren () +{ + return m_count; +} + +lldb::ValueObjectSP +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx) +{ + if (idx >= m_count) + return ValueObjectSP(); + if (m_base_data_address == 0 || m_count == 0) + return ValueObjectSP(); + size_t byte_idx = (idx >> 3); // divide by 8 to get byte index + size_t bit_index = (idx & 7); // efficient idx % 8 for bit index + lldb::addr_t byte_location = m_base_data_address + byte_idx; + ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP()); + if (!process_sp) + return ValueObjectSP(); + uint8_t byte = 0; + uint8_t mask = 0; + Error err; + size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err); + if (err.Fail() || bytes_read == 0) + return ValueObjectSP(); + switch (bit_index) + { + case 0: + mask = 1; break; + case 1: + mask = 2; break; + case 2: + mask = 4; break; + case 3: + mask = 8; break; + case 4: + mask = 16; break; + case 5: + mask = 32; break; + case 6: + mask = 64; break; + case 7: + mask = 128; break; + default: + return ValueObjectSP(); + } + bool bit_set = ((byte & mask) != 0); + Target& target(process_sp->GetTarget()); + ValueObjectSP retval_sp; + if (bit_set) + target.EvaluateExpression("(bool)true", NULL, retval_sp); + else + target.EvaluateExpression("(bool)false", NULL, retval_sp); + StreamString name; name.Printf("[%zu]",idx); + if (retval_sp) + retval_sp->SetName(ConstString(name.GetData())); + return retval_sp; +} + +/*(std::__1::vector<std::__1::allocator<bool> >) vBool = { + __begin_ = 0x00000001001000e0 + __size_ = 56 + __cap_alloc_ = { + std::__1::__libcpp_compressed_pair_imp<unsigned long, std::__1::allocator<unsigned long> > = { + __first_ = 1 + } + } + }*/ + +bool +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::Update() +{ + ValueObjectSP valobj_sp = m_backend.GetSP(); + if (!valobj_sp) + return false; + if (!valobj_sp) + return false; + m_exe_ctx_ref = valobj_sp->GetExecutionContextRef(); + ValueObjectSP size_sp(valobj_sp->GetChildMemberWithName(ConstString("__size_"), true)); + if (!size_sp) + return false; + m_count = size_sp->GetValueAsUnsigned(0); + if (!m_count) + return true; + ValueObjectSP begin_sp(valobj_sp->GetChildMemberWithName(ConstString("__begin_"), true)); + if (!begin_sp) + { + m_count = 0; + return false; + } + m_base_data_address = begin_sp->GetValueAsUnsigned(0); + if (!m_base_data_address) + { + m_count = 0; + return false; + } + return false; +} + +bool +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::MightHaveChildren () +{ + return true; +} + +size_t +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name) +{ + if (!m_count || !m_base_data_address) + return UINT32_MAX; + const char* item_name = name.GetCString(); + uint32_t idx = ExtractIndexFromString(item_name); + if (idx < UINT32_MAX && idx >= CalculateNumChildren()) + return UINT32_MAX; + return idx; +} + +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::~LibcxxVectorBoolSyntheticFrontEnd () +{} + +SyntheticChildrenFrontEnd* +lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp) +{ + if (!valobj_sp) + return NULL; + return (new LibcxxVectorBoolSyntheticFrontEnd(valobj_sp)); +} + +/* + (lldb) fr var ibeg --raw --ptr-depth 1 + (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 = { + __i_ = { + __ptr_ = 0x0000000100103870 { + std::__1::__tree_node_base<void *> = { + std::__1::__tree_end_node<std::__1::__tree_node_base<void *> *> = { + __left_ = 0x0000000000000000 + } + __right_ = 0x0000000000000000 + __parent_ = 0x00000001001038b0 + __is_black_ = true + } + __value_ = { + first = 0 + second = { std::string } + */ + +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::LibCxxMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) : +SyntheticChildrenFrontEnd(*valobj_sp.get()), +m_pair_ptr() +{ + if (valobj_sp) + Update(); +} + +bool +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::Update() +{ + ValueObjectSP valobj_sp = m_backend.GetSP(); + if (!valobj_sp) + return false; + + TargetSP target_sp(valobj_sp->GetTargetSP()); + + if (!target_sp) + return false; + + if (!valobj_sp) + return false; + + // this must be a ValueObject* because it is a child of the ValueObject we are producing children for + // it if were a ValueObjectSP, we would end up with a loop (iterator -> synthetic -> child -> parent == iterator) + // and that would in turn leak memory by never allowing the ValueObjects to die and free their memory + m_pair_ptr = valobj_sp->GetValueForExpressionPath(".__i_.__ptr_->__value_", + NULL, + NULL, + NULL, + ValueObject::GetValueForExpressionPathOptions().DontCheckDotVsArrowSyntax().DontAllowSyntheticChildren(), + NULL).get(); + + return false; +} + +size_t +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::CalculateNumChildren () +{ + return 2; +} + +lldb::ValueObjectSP +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx) +{ + if (!m_pair_ptr) + return lldb::ValueObjectSP(); + return m_pair_ptr->GetChildAtIndex(idx, true); +} + +bool +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::MightHaveChildren () +{ + return true; +} + +size_t +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name) +{ + if (name == ConstString("first")) + return 0; + if (name == ConstString("second")) + return 1; + return UINT32_MAX; +} + +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::~LibCxxMapIteratorSyntheticFrontEnd () +{ + // this will be deleted when its parent dies (since it's a child object) + //delete m_pair_ptr; +} + +SyntheticChildrenFrontEnd* +lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp) +{ + if (!valobj_sp) + return NULL; + return (new LibCxxMapIteratorSyntheticFrontEnd(valobj_sp)); +} + +/* + (lldb) fr var ibeg --raw --ptr-depth 1 -T + (std::__1::__wrap_iter<int *>) ibeg = { + (std::__1::__wrap_iter<int *>::iterator_type) __i = 0x00000001001037a0 { + (int) *__i = 1 + } + } +*/ + +SyntheticChildrenFrontEnd* +lldb_private::formatters::LibCxxVectorIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp) +{ + static ConstString g_item_name; + if (!g_item_name) + g_item_name.SetCString("__i"); + if (!valobj_sp) + return NULL; + return (new VectorIteratorSyntheticFrontEnd(valobj_sp,g_item_name)); +} + +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::LibcxxSharedPtrSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) : +SyntheticChildrenFrontEnd(*valobj_sp.get()), +m_cntrl(NULL), +m_count_sp(), +m_weak_count_sp(), +m_ptr_size(0), +m_byte_order(lldb::eByteOrderInvalid) +{ + if (valobj_sp) + Update(); +} + +size_t +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::CalculateNumChildren () +{ + return (m_cntrl ? 1 : 0); +} + +lldb::ValueObjectSP +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetChildAtIndex (size_t idx) +{ + if (!m_cntrl) + return lldb::ValueObjectSP(); + + ValueObjectSP valobj_sp = m_backend.GetSP(); + if (!valobj_sp) + return lldb::ValueObjectSP(); + + if (idx == 0) + return valobj_sp->GetChildMemberWithName(ConstString("__ptr_"), true); + + if (idx > 2) + return lldb::ValueObjectSP(); + + if (idx == 1) + { + if (!m_count_sp) + { + ValueObjectSP shared_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_owners_"),true)); + if (!shared_owners_sp) + return lldb::ValueObjectSP(); + uint64_t count = 1 + shared_owners_sp->GetValueAsUnsigned(0); + DataExtractor data(&count, 8, m_byte_order, m_ptr_size); + m_count_sp = ValueObject::CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_owners_sp->GetClangType()); + } + return m_count_sp; + } + else /* if (idx == 2) */ + { + if (!m_weak_count_sp) + { + ValueObjectSP shared_weak_owners_sp(m_cntrl->GetChildMemberWithName(ConstString("__shared_weak_owners_"),true)); + if (!shared_weak_owners_sp) + return lldb::ValueObjectSP(); + uint64_t count = 1 + shared_weak_owners_sp->GetValueAsUnsigned(0); + DataExtractor data(&count, 8, m_byte_order, m_ptr_size); + m_weak_count_sp = ValueObject::CreateValueObjectFromData("count", data, valobj_sp->GetExecutionContextRef(), shared_weak_owners_sp->GetClangType()); + } + return m_weak_count_sp; + } +} + +bool +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::Update() +{ + m_count_sp.reset(); + m_weak_count_sp.reset(); + m_cntrl = NULL; + + ValueObjectSP valobj_sp = m_backend.GetSP(); + if (!valobj_sp) + return false; + + TargetSP target_sp(valobj_sp->GetTargetSP()); + if (!target_sp) + return false; + + m_byte_order = target_sp->GetArchitecture().GetByteOrder(); + m_ptr_size = target_sp->GetArchitecture().GetAddressByteSize(); + + lldb::ValueObjectSP cntrl_sp(valobj_sp->GetChildMemberWithName(ConstString("__cntrl_"),true)); + + m_cntrl = cntrl_sp.get(); // need to store the raw pointer to avoid a circular dependency + return false; +} + +bool +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::MightHaveChildren () +{ + return true; +} + +size_t +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name) +{ + if (name == ConstString("__ptr_")) + return 0; + if (name == ConstString("count")) + return 1; + if (name == ConstString("weak_count")) + return 2; + return UINT32_MAX; +} + +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::~LibcxxSharedPtrSyntheticFrontEnd () +{} + +SyntheticChildrenFrontEnd* +lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp) +{ + if (!valobj_sp) + return NULL; + return (new LibcxxSharedPtrSyntheticFrontEnd(valobj_sp)); +} + +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::LibcxxStdVectorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) : + SyntheticChildrenFrontEnd(*valobj_sp.get()), + m_start(NULL), + m_finish(NULL), + m_element_type(), + m_element_size(0), + m_children() +{ + if (valobj_sp) + Update(); +} + +size_t +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::CalculateNumChildren () +{ + if (!m_start || !m_finish) + return 0; + uint64_t start_val = m_start->GetValueAsUnsigned(0); + uint64_t finish_val = m_finish->GetValueAsUnsigned(0); + + if (start_val == 0 || finish_val == 0) + return 0; + + if (start_val >= finish_val) + return 0; + + size_t num_children = (finish_val - start_val); + if (num_children % m_element_size) + return 0; + return num_children/m_element_size; +} + +lldb::ValueObjectSP +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::GetChildAtIndex (size_t idx) +{ + if (!m_start || !m_finish) + return lldb::ValueObjectSP(); + + auto cached = m_children.find(idx); + if (cached != m_children.end()) + return cached->second; + + uint64_t offset = idx * m_element_size; + offset = offset + m_start->GetValueAsUnsigned(0); + StreamString name; + name.Printf("[%zu]",idx); + ValueObjectSP child_sp = ValueObject::CreateValueObjectFromAddress(name.GetData(), offset, m_backend.GetExecutionContextRef(), m_element_type); + m_children[idx] = child_sp; + return child_sp; +} + +bool +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::Update() +{ + m_start = m_finish = NULL; + m_children.clear(); + ValueObjectSP data_type_finder_sp(m_backend.GetChildMemberWithName(ConstString("__end_cap_"),true)); + if (!data_type_finder_sp) + return false; + data_type_finder_sp = data_type_finder_sp->GetChildMemberWithName(ConstString("__first_"),true); + if (!data_type_finder_sp) + return false; + m_element_type = data_type_finder_sp->GetClangType().GetPointeeType(); + m_element_size = m_element_type.GetByteSize(); + + if (m_element_size > 0) + { + // store raw pointers or end up with a circular dependency + m_start = m_backend.GetChildMemberWithName(ConstString("__begin_"),true).get(); + m_finish = m_backend.GetChildMemberWithName(ConstString("__end_"),true).get(); + } + return false; +} + +bool +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::MightHaveChildren () +{ + return true; +} + +size_t +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name) +{ + if (!m_start || !m_finish) + return UINT32_MAX; + return ExtractIndexFromString(name.GetCString()); +} + +lldb_private::formatters::LibcxxStdVectorSyntheticFrontEnd::~LibcxxStdVectorSyntheticFrontEnd () +{ + // 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); +} |