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llvm-project/lldb/source/API/SBData.cpp

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Redesign of the interaction between Python and frozen objects: - introduced two new classes ValueObjectConstResultChild and ValueObjectConstResultImpl: the first one is a ValueObjectChild obtained from a ValueObjectConstResult, the second is a common implementation backend for VOCR and VOCRCh of method calls meant to read through pointers stored in frozen objects ; now such reads transparently move from host to target as required - as a consequence of the above, removed code that made target-memory copies of expression results in several places throughout LLDB, and also removed code that enabled to recognize an expression result VO as such - introduced a new GetPointeeData() method in ValueObject that lets you read a given amount of objects of type T from a VO representing a T* or T[], and doing dereferences transparently in private layer it returns a DataExtractor ; in public layer it returns an instance of a newly created lldb::SBData - as GetPointeeData() does the right thing for both frozen and non-frozen ValueObject's, reimplemented ReadPointedString() to use it en lieu of doing the raw read itself - introduced a new GetData() method in ValueObject that lets you get a copy of the data that backs the ValueObject (for pointers, this returns the address without any previous dereferencing steps ; for arrays it actually reads the whole chunk of memory) in public layer this returns an SBData, just like GetPointeeData() - introduced a new CreateValueFromData() method in SBValue that lets you create a new SBValue from a chunk of data wrapped in an SBData the limitation to remember for this kind of SBValue is that they have no address: extracting the address-of for these objects (with any of GetAddress(), GetLoadAddress() and AddressOf()) will return invalid values - added several tests to check that "p"-ing objects (STL classes, char* and char[]) will do the right thing Solved a bug where global pointers to global variables were not dereferenced correctly for display New target setting "max-string-summary-length" gives the maximum number of characters to show in a string when summarizing it, instead of the hardcoded 128 Solved a bug where the summary for char[] and char* would not be shown if the ValueObject's were dumped via the "p" command Removed m_pointers_point_to_load_addrs from ValueObject. Introduced a new m_address_type_of_children, which each ValueObject can set to tell the address type of any pointers and/or references it creates. In the current codebase, this is load address most of the time (the only notable exception being file addresses that generate file address children UNLESS we have a live process) Updated help text for summary-string Fixed an issue in STL formatters where std::stlcontainer::iterator would match the container's synthetic children providers Edited the syntax and help for some commands to have proper argument types llvm-svn: 139160
2011-09-07 03:20:51 +08:00
//===-- SBData.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/API/SBData.h"
#include "lldb/API/SBError.h"
#include "lldb/API/SBStream.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/Log.h"
using namespace lldb;
using namespace lldb_private;
SBData::SBData ()
{
}
SBData::SBData (const lldb::DataExtractorSP& data_sp) :
m_opaque_sp (data_sp)
{
}
SBData::SBData(const SBData &rhs) :
m_opaque_sp (rhs.m_opaque_sp)
{
}
const SBData &
SBData::operator = (const SBData &rhs)
{
if (this != &rhs)
m_opaque_sp = rhs.m_opaque_sp;
return *this;
}
SBData::~SBData ()
{
}
void
SBData::SetOpaque (const lldb::DataExtractorSP &data_sp)
{
m_opaque_sp = data_sp;
}
lldb_private::DataExtractor *
SBData::get() const
{
return m_opaque_sp.get();
}
lldb_private::DataExtractor *
SBData::operator->() const
{
return m_opaque_sp.operator->();
}
lldb::DataExtractorSP &
SBData::operator*()
{
return m_opaque_sp;
}
const lldb::DataExtractorSP &
SBData::operator*() const
{
return m_opaque_sp;
}
bool
SBData::IsValid()
{
return m_opaque_sp.get() != NULL;
}
uint8_t
SBData::GetAddressByteSize ()
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
uint8_t value = 0;
if (m_opaque_sp.get())
value = m_opaque_sp->GetAddressByteSize();
if (log)
log->Printf ("SBData::GetAddressByteSize () => "
"(%i)", value);
return value;
}
void
SBData::Clear ()
{
if (m_opaque_sp.get())
m_opaque_sp->Clear();
}
size_t
SBData::GetByteSize ()
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
size_t value = 0;
if (m_opaque_sp.get())
value = m_opaque_sp->GetByteSize();
if (log)
log->Printf ("SBData::GetByteSize () => "
"(%i)", value);
return value;
}
lldb::ByteOrder
SBData::GetByteOrder ()
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
lldb::ByteOrder value = eByteOrderInvalid;
if (m_opaque_sp.get())
value = m_opaque_sp->GetByteOrder();
if (log)
log->Printf ("SBData::GetByteOrder () => "
"(%i)", value);
return value;
}
float
SBData::GetFloat (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
float value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetFloat(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetFloat (error=%p,offset=%d) => "
"(%f)", error.get(), offset, value);
return value;
}
double
SBData::GetDouble (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
double value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetDouble(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetDouble (error=%p,offset=%d) => "
"(%f)", error.get(), offset, value);
return value;
}
long double
SBData::GetLongDouble (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
long double value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetLongDouble(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetLongDouble (error=%p,offset=%d) => "
"(%lf)", error.get(), offset, value);
return value;
}
lldb::addr_t
SBData::GetAddress (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
lldb::addr_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetAddress(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetAddress (error=%p,offset=%d) => "
"(%p)", error.get(), offset, (void*)value);
return value;
}
uint8_t
SBData::GetUnsignedInt8 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
uint8_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetU8(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetUnsignedInt8 (error=%p,offset=%d) => "
"(%c)", error.get(), offset, value);
return value;
}
uint16_t
SBData::GetUnsignedInt16 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
uint16_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetU16(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetUnsignedInt16 (error=%p,offset=%d) => "
"(%hd)", error.get(), offset, value);
return value;
}
uint32_t
SBData::GetUnsignedInt32 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
uint32_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetU32(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetUnsignedInt32 (error=%p,offset=%d) => "
"(%d)", error.get(), offset, value);
return value;
}
uint64_t
SBData::GetUnsignedInt64 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
uint64_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetU64(&offset);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetUnsignedInt64 (error=%p,offset=%d) => "
"(%q)", error.get(), offset, value);
return value;
}
int8_t
SBData::GetSignedInt8 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
int8_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = (int8_t)m_opaque_sp->GetMaxS64(&offset, 1);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetSignedInt8 (error=%p,offset=%d) => "
"(%c)", error.get(), offset, value);
return value;
}
int16_t
SBData::GetSignedInt16 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
int16_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = (int16_t)m_opaque_sp->GetMaxS64(&offset, 2);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetSignedInt16 (error=%p,offset=%d) => "
"(%hd)", error.get(), offset, value);
return value;
}
int32_t
SBData::GetSignedInt32 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
int32_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = (int32_t)m_opaque_sp->GetMaxS64(&offset, 4);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetSignedInt32 (error=%p,offset=%d) => "
"(%d)", error.get(), offset, value);
return value;
}
int64_t
SBData::GetSignedInt64 (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
int64_t value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = (int64_t)m_opaque_sp->GetMaxS64(&offset, 8);
if (offset == old_offset)
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetSignedInt64 (error=%p,offset=%d) => "
"(%q)", error.get(), offset, value);
return value;
}
const char*
SBData::GetString (lldb::SBError& error, uint32_t offset)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
const char* value = 0;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
value = m_opaque_sp->GetCStr(&offset);
if (offset == old_offset || (value == NULL))
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::GetString (error=%p,offset=%d) => "
"(%p)", error.get(), offset, value);
return value;
}
bool
SBData::GetDescription (lldb::SBStream &description)
{
if (m_opaque_sp)
{
description.ref();
m_opaque_sp->Dump(description.get(),
0,
lldb::eFormatBytesWithASCII,
1,
m_opaque_sp->GetByteSize(),
16,
LLDB_INVALID_ADDRESS,
0,
0);
}
else
description.Printf ("No Value");
return true;
}
size_t
SBData::ReadRawData (lldb::SBError& error,
uint32_t offset,
void *buf,
size_t size)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
void* ok = NULL;
if (!m_opaque_sp.get())
{
error.SetErrorString("no value to read from");
}
else
{
uint32_t old_offset = offset;
ok = m_opaque_sp->GetU8(&offset, buf, size);
if ((offset == old_offset) || (ok == NULL))
error.SetErrorString("unable to read data");
}
if (log)
log->Printf ("SBData::ReadRawData (error=%p,offset=%d,buf=%p,size=%d) => "
"(%p)", error.get(), offset, buf, size, ok);
return ok ? size : 0;
}
void
SBData::SetData(lldb::SBError& error,
const void *buf,
size_t size,
lldb::ByteOrder endian,
uint8_t addr_size)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
if (!m_opaque_sp.get())
m_opaque_sp.reset(new DataExtractor(buf, size, endian, addr_size));
else
m_opaque_sp->SetData(buf, size, endian);
if (log)
log->Printf ("SBData::SetData (error=%p,buf=%p,size=%d,endian=%d,addr_size=%c) => "
"(%p)", error.get(), buf, size, endian, addr_size, m_opaque_sp.get());
}
bool
SBData::Append(const SBData& rhs)
{
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
bool value = false;
if (m_opaque_sp.get() && rhs.m_opaque_sp.get())
value = m_opaque_sp.get()->Append(*rhs.m_opaque_sp);
if (log)
log->Printf ("SBData::Append (rhs=%p) => "
"(%s)", rhs.get(), value ? "true" : "false");
return value;
}