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llvm-project/lldb/source/Plugins/Language/ObjC/CF.cpp
Enrico Granata 675f49bbd5 This is the work I was building up to with my patches yesterday 
Introduce the notion of Language-based formatter prefix/suffix
This is meant for languages that share certain data types but present them in syntatically different ways, such that LLDB can now have language-based awareness of which of the syntax variations it has to present to the user when formatting those values

This is goodness for new languages and interoperability, but is NFC for existing languages. As such, existing tests cover this

llvm-svn: 249587
2015-10-07 18:36:53 +00:00

334 lines
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//===-- CF.cpp ----------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "CF.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
bool
lldb_private::formatters::CFAbsoluteTimeSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
time_t epoch = GetOSXEpoch();
epoch = epoch + (time_t)valobj.GetValueAsUnsigned(0);
tm *tm_date = localtime(&epoch);
if (!tm_date)
return false;
std::string buffer(1024,0);
if (strftime (&buffer[0], 1023, "%Z", tm_date) == 0)
return false;
stream.Printf("%04d-%02d-%02d %02d:%02d:%02d %s", tm_date->tm_year+1900, tm_date->tm_mon+1, tm_date->tm_mday, tm_date->tm_hour, tm_date->tm_min, tm_date->tm_sec, buffer.c_str());
return true;
}
bool
lldb_private::formatters::CFBagSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
static ConstString g_TypeHint("CFBag");
ProcessSP process_sp = valobj.GetProcessSP();
if (!process_sp)
return false;
ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return false;
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
if (!descriptor.get() || !descriptor->IsValid())
return false;
uint32_t ptr_size = process_sp->GetAddressByteSize();
lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
if (!valobj_addr)
return false;
uint32_t count = 0;
bool is_type_ok = false; // check to see if this is a CFBag we know about
if (descriptor->IsCFType())
{
ConstString type_name(valobj.GetTypeName());
if (type_name == ConstString("__CFBag") || type_name == ConstString("const struct __CFBag"))
{
if (valobj.IsPointerType())
is_type_ok = true;
}
}
if (is_type_ok == false)
{
StackFrameSP frame_sp(valobj.GetFrameSP());
if (!frame_sp)
return false;
ValueObjectSP count_sp;
StreamString expr;
expr.Printf("(int)CFBagGetCount((void*)0x%" PRIx64 ")",valobj.GetPointerValue());
EvaluateExpressionOptions options;
options.SetResultIsInternal(true);
if (process_sp->GetTarget().EvaluateExpression(expr.GetData(), frame_sp.get(), count_sp, options) != eExpressionCompleted)
return false;
if (!count_sp)
return false;
count = count_sp->GetValueAsUnsigned(0);
}
else
{
uint32_t offset = 2*ptr_size+4 + valobj_addr;
Error error;
count = process_sp->ReadUnsignedIntegerFromMemory(offset, 4, 0, error);
if (error.Fail())
return false;
}
std::string prefix,suffix;
if (Language* language = Language::FindPlugin(options.GetLanguage()))
{
if (!language->GetFormatterPrefixSuffix(valobj, g_TypeHint, prefix, suffix))
{
prefix.clear();
suffix.clear();
}
}
stream.Printf("%s\"%u value%s\"%s",
prefix.c_str(),
count,(count == 1 ? "" : "s"),
suffix.c_str());
return true;
}
bool
lldb_private::formatters::CFBitVectorSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
ProcessSP process_sp = valobj.GetProcessSP();
if (!process_sp)
return false;
ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return false;
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
if (!descriptor.get() || !descriptor->IsValid())
return false;
uint32_t ptr_size = process_sp->GetAddressByteSize();
lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
if (!valobj_addr)
return false;
uint32_t count = 0;
bool is_type_ok = false; // check to see if this is a CFBag we know about
if (descriptor->IsCFType())
{
ConstString type_name(valobj.GetTypeName());
if (type_name == ConstString("__CFMutableBitVector") || type_name == ConstString("__CFBitVector") || type_name == ConstString("CFMutableBitVectorRef") || type_name == ConstString("CFBitVectorRef"))
{
if (valobj.IsPointerType())
is_type_ok = true;
}
}
if (is_type_ok == false)
return false;
Error error;
count = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr+2*ptr_size, ptr_size, 0, error);
if (error.Fail())
return false;
uint64_t num_bytes = count / 8 + ((count & 7) ? 1 : 0);
addr_t data_ptr = process_sp->ReadPointerFromMemory(valobj_addr+2*ptr_size+2*ptr_size, error);
if (error.Fail())
return false;
// make sure we do not try to read huge amounts of data
if (num_bytes > 1024)
num_bytes = 1024;
DataBufferSP buffer_sp(new DataBufferHeap(num_bytes,0));
num_bytes = process_sp->ReadMemory(data_ptr, buffer_sp->GetBytes(), num_bytes, error);
if (error.Fail() || num_bytes == 0)
return false;
uint8_t *bytes = buffer_sp->GetBytes();
for (uint64_t byte_idx = 0; byte_idx < num_bytes-1; byte_idx++)
{
uint8_t byte = bytes[byte_idx];
bool bit0 = (byte & 1) == 1;
bool bit1 = (byte & 2) == 2;
bool bit2 = (byte & 4) == 4;
bool bit3 = (byte & 8) == 8;
bool bit4 = (byte & 16) == 16;
bool bit5 = (byte & 32) == 32;
bool bit6 = (byte & 64) == 64;
bool bit7 = (byte & 128) == 128;
stream.Printf("%c%c%c%c %c%c%c%c ",
(bit7 ? '1' : '0'),
(bit6 ? '1' : '0'),
(bit5 ? '1' : '0'),
(bit4 ? '1' : '0'),
(bit3 ? '1' : '0'),
(bit2 ? '1' : '0'),
(bit1 ? '1' : '0'),
(bit0 ? '1' : '0'));
count -= 8;
}
{
// print the last byte ensuring we do not print spurious bits
uint8_t byte = bytes[num_bytes-1];
bool bit0 = (byte & 1) == 1;
bool bit1 = (byte & 2) == 2;
bool bit2 = (byte & 4) == 4;
bool bit3 = (byte & 8) == 8;
bool bit4 = (byte & 16) == 16;
bool bit5 = (byte & 32) == 32;
bool bit6 = (byte & 64) == 64;
bool bit7 = (byte & 128) == 128;
if (count)
{
stream.Printf("%c",bit7 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit6 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit5 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit4 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit3 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit2 ? '1' : '0');
count -= 1;
}
if (count)
{
stream.Printf("%c",bit1 ? '1' : '0');
count -= 1;
}
if (count)
stream.Printf("%c",bit0 ? '1' : '0');
}
return true;
}
bool
lldb_private::formatters::CFBinaryHeapSummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
static ConstString g_TypeHint("CFBinaryHeap");
ProcessSP process_sp = valobj.GetProcessSP();
if (!process_sp)
return false;
ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return false;
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
if (!descriptor.get() || !descriptor->IsValid())
return false;
uint32_t ptr_size = process_sp->GetAddressByteSize();
lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
if (!valobj_addr)
return false;
uint32_t count = 0;
bool is_type_ok = false; // check to see if this is a CFBinaryHeap we know about
if (descriptor->IsCFType())
{
ConstString type_name(valobj.GetTypeName());
if (type_name == ConstString("__CFBinaryHeap") || type_name == ConstString("const struct __CFBinaryHeap"))
{
if (valobj.IsPointerType())
is_type_ok = true;
}
}
if (is_type_ok == false)
{
StackFrameSP frame_sp(valobj.GetFrameSP());
if (!frame_sp)
return false;
ValueObjectSP count_sp;
StreamString expr;
expr.Printf("(int)CFBinaryHeapGetCount((void*)0x%" PRIx64 ")",valobj.GetPointerValue());
EvaluateExpressionOptions options;
options.SetResultIsInternal(true);
if (process_sp->GetTarget().EvaluateExpression(expr.GetData(), frame_sp.get(), count_sp, options) != eExpressionCompleted)
return false;
if (!count_sp)
return false;
count = count_sp->GetValueAsUnsigned(0);
}
else
{
uint32_t offset = 2*ptr_size;
Error error;
count = process_sp->ReadUnsignedIntegerFromMemory(offset, 4, 0, error);
if (error.Fail())
return false;
}
std::string prefix,suffix;
if (Language* language = Language::FindPlugin(options.GetLanguage()))
{
if (!language->GetFormatterPrefixSuffix(valobj, g_TypeHint, prefix, suffix))
{
prefix.clear();
suffix.clear();
}
}
stream.Printf("%s\"%u item%s\"%s",
prefix.c_str(),
count,(count == 1 ? "" : "s"),
suffix.c_str());
return true;
}
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