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llvm/lldb/source/Core/Address.cpp
Greg Clayton 1f7460716b <rdar://problem/11757916> 
Make breakpoint setting by file and line much more efficient by only looking for inlined breakpoint locations if we are setting a breakpoint in anything but a source implementation file. Implementing this complex for a many reasons. Turns out that parsing compile units lazily had some issues with respect to how we need to do things with DWARF in .o files. So the fixes in the checkin for this makes these changes:
- Add a new setting called "target.inline-breakpoint-strategy" which can be set to "never", "always", or "headers". "never" will never try and set any inlined breakpoints (fastest). "always" always looks for inlined breakpoint locations (slowest, but most accurate). "headers", which is the default setting, will only look for inlined breakpoint locations if the breakpoint is set in what are consudered to be header files, which is realy defined as "not in an implementation source file". 
- modify the breakpoint setting by file and line to check the current "target.inline-breakpoint-strategy" setting and act accordingly
- Modify compile units to be able to get their language and other info lazily. This allows us to create compile units from the debug map and not have to fill all of the details in, and then lazily discover this information as we go on debuggging. This is needed to avoid parsing all .o files when setting breakpoints in implementation only files (no inlines). Otherwise we would need to parse the .o file, the object file (mach-o in our case) and the symbol file (DWARF in the object file) just to see what the compile unit was.
- modify the "SymbolFileDWARFDebugMap" to subclass lldb_private::Module so that the virtual "GetObjectFile()" and "GetSymbolVendor()" functions can be intercepted when the .o file contenst are later lazilly needed. Prior to this fix, when we first instantiated the "SymbolFileDWARFDebugMap" class, we would also make modules, object files and symbol files for every .o file in the debug map because we needed to fix up the sections in the .o files with information that is in the executable debug map. Now we lazily do this in the DebugMapModule::GetObjectFile()

Cleaned up header includes a bit as well.

llvm-svn: 162860
2012-08-29 21:13:06 +00:00

1057 lines
35 KiB
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//===-- Address.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/Core/Address.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "llvm/ADT/Triple.h"
using namespace lldb;
using namespace lldb_private;
static size_t
ReadBytes (ExecutionContextScope *exe_scope, const Address &address, void *dst, size_t dst_len)
{
if (exe_scope == NULL)
return 0;
TargetSP target_sp (exe_scope->CalculateTarget());
if (target_sp)
{
Error error;
bool prefer_file_cache = false;
return target_sp->ReadMemory (address, prefer_file_cache, dst, dst_len, error);
}
return 0;
}
static bool
GetByteOrderAndAddressSize (ExecutionContextScope *exe_scope, const Address &address, ByteOrder& byte_order, uint32_t& addr_size)
{
byte_order = eByteOrderInvalid;
addr_size = 0;
if (exe_scope == NULL)
return false;
TargetSP target_sp (exe_scope->CalculateTarget());
if (target_sp)
{
byte_order = target_sp->GetArchitecture().GetByteOrder();
addr_size = target_sp->GetArchitecture().GetAddressByteSize();
}
if (byte_order == eByteOrderInvalid || addr_size == 0)
{
ModuleSP module_sp (address.GetModule());
if (module_sp)
{
byte_order = module_sp->GetArchitecture().GetByteOrder();
addr_size = module_sp->GetArchitecture().GetAddressByteSize();
}
}
return byte_order != eByteOrderInvalid && addr_size != 0;
}
static uint64_t
ReadUIntMax64 (ExecutionContextScope *exe_scope, const Address &address, uint32_t byte_size, bool &success)
{
uint64_t uval64 = 0;
if (exe_scope == NULL || byte_size > sizeof(uint64_t))
{
success = false;
return 0;
}
uint64_t buf = 0;
success = ReadBytes (exe_scope, address, &buf, byte_size) == byte_size;
if (success)
{
ByteOrder byte_order = eByteOrderInvalid;
uint32_t addr_size = 0;
if (GetByteOrderAndAddressSize (exe_scope, address, byte_order, addr_size))
{
DataExtractor data (&buf, sizeof(buf), byte_order, addr_size);
uint32_t offset = 0;
uval64 = data.GetU64(&offset);
}
else
success = false;
}
return uval64;
}
static bool
ReadAddress (ExecutionContextScope *exe_scope, const Address &address, uint32_t pointer_size, Address &deref_so_addr)
{
if (exe_scope == NULL)
return false;
bool success = false;
addr_t deref_addr = ReadUIntMax64 (exe_scope, address, pointer_size, success);
if (success)
{
ExecutionContext exe_ctx;
exe_scope->CalculateExecutionContext(exe_ctx);
// If we have any sections that are loaded, try and resolve using the
// section load list
Target *target = exe_ctx.GetTargetPtr();
if (target && !target->GetSectionLoadList().IsEmpty())
{
if (target->GetSectionLoadList().ResolveLoadAddress (deref_addr, deref_so_addr))
return true;
}
else
{
// If we were not running, yet able to read an integer, we must
// have a module
ModuleSP module_sp (address.GetModule());
assert (module_sp);
if (module_sp->ResolveFileAddress(deref_addr, deref_so_addr))
return true;
}
// We couldn't make "deref_addr" into a section offset value, but we were
// able to read the address, so we return a section offset address with
// no section and "deref_addr" as the offset (address).
deref_so_addr.SetRawAddress(deref_addr);
return true;
}
return false;
}
static bool
DumpUInt (ExecutionContextScope *exe_scope, const Address &address, uint32_t byte_size, Stream* strm)
{
if (exe_scope == NULL || byte_size == 0)
return 0;
std::vector<uint8_t> buf(byte_size, 0);
if (ReadBytes (exe_scope, address, &buf[0], buf.size()) == buf.size())
{
ByteOrder byte_order = eByteOrderInvalid;
uint32_t addr_size = 0;
if (GetByteOrderAndAddressSize (exe_scope, address, byte_order, addr_size))
{
DataExtractor data (&buf.front(), buf.size(), byte_order, addr_size);
data.Dump (strm,
0, // Start offset in "data"
eFormatHex, // Print as characters
buf.size(), // Size of item
1, // Items count
UINT32_MAX, // num per line
LLDB_INVALID_ADDRESS,// base address
0, // bitfield bit size
0); // bitfield bit offset
return true;
}
}
return false;
}
static size_t
ReadCStringFromMemory (ExecutionContextScope *exe_scope, const Address &address, Stream *strm)
{
if (exe_scope == NULL)
return 0;
const size_t k_buf_len = 256;
char buf[k_buf_len+1];
buf[k_buf_len] = '\0'; // NULL terminate
// Byte order and address size don't matter for C string dumping..
DataExtractor data (buf, sizeof(buf), lldb::endian::InlHostByteOrder(), 4);
size_t total_len = 0;
size_t bytes_read;
Address curr_address(address);
strm->PutChar ('"');
while ((bytes_read = ReadBytes (exe_scope, curr_address, buf, k_buf_len)) > 0)
{
size_t len = strlen(buf);
if (len == 0)
break;
if (len > bytes_read)
len = bytes_read;
data.Dump (strm,
0, // Start offset in "data"
eFormatChar, // Print as characters
1, // Size of item (1 byte for a char!)
len, // How many bytes to print?
UINT32_MAX, // num per line
LLDB_INVALID_ADDRESS,// base address
0, // bitfield bit size
0); // bitfield bit offset
total_len += bytes_read;
if (len < k_buf_len)
break;
curr_address.SetOffset (curr_address.GetOffset() + bytes_read);
}
strm->PutChar ('"');
return total_len;
}
Address::Address (lldb::addr_t abs_addr) :
m_section_wp (),
m_offset (abs_addr)
{
}
Address::Address (addr_t address, const SectionList *section_list) :
m_section_wp (),
m_offset (LLDB_INVALID_ADDRESS)
{
ResolveAddressUsingFileSections(address, section_list);
}
const Address&
Address::operator= (const Address& rhs)
{
if (this != &rhs)
{
m_section_wp = rhs.m_section_wp;
m_offset = rhs.m_offset;
}
return *this;
}
bool
Address::ResolveAddressUsingFileSections (addr_t file_addr, const SectionList *section_list)
{
if (section_list)
{
SectionSP section_sp (section_list->FindSectionContainingFileAddress(file_addr));
m_section_wp = section_sp;
if (section_sp)
{
assert( section_sp->ContainsFileAddress(file_addr) );
m_offset = file_addr - section_sp->GetFileAddress();
return true; // Successfully transformed addr into a section offset address
}
}
m_offset = file_addr;
return false; // Failed to resolve this address to a section offset value
}
ModuleSP
Address::GetModule () const
{
lldb::ModuleSP module_sp;
SectionSP section_sp (GetSection());
if (section_sp)
module_sp = section_sp->GetModule();
return module_sp;
}
addr_t
Address::GetFileAddress () const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
addr_t sect_file_addr = section_sp->GetFileAddress();
if (sect_file_addr == LLDB_INVALID_ADDRESS)
{
// Section isn't resolved, we can't return a valid file address
return LLDB_INVALID_ADDRESS;
}
// We have a valid file range, so we can return the file based
// address by adding the file base address to our offset
return sect_file_addr + m_offset;
}
// No section, we just return the offset since it is the value in this case
return m_offset;
}
addr_t
Address::GetLoadAddress (Target *target) const
{
SectionSP section_sp (GetSection());
if (!section_sp)
{
// No section, we just return the offset since it is the value in this case
return m_offset;
}
if (target)
{
addr_t sect_load_addr = section_sp->GetLoadBaseAddress (target);
if (sect_load_addr != LLDB_INVALID_ADDRESS)
{
// We have a valid file range, so we can return the file based
// address by adding the file base address to our offset
return sect_load_addr + m_offset;
}
}
// The section isn't resolved or no process was supplied so we can't
// return a valid file address.
return LLDB_INVALID_ADDRESS;
}
addr_t
Address::GetCallableLoadAddress (Target *target) const
{
addr_t code_addr = GetLoadAddress (target);
if (target)
return target->GetCallableLoadAddress (code_addr, GetAddressClass());
return code_addr;
}
bool
Address::SetCallableLoadAddress (lldb::addr_t load_addr, Target *target)
{
if (SetLoadAddress (load_addr, target))
{
if (target)
m_offset = target->GetCallableLoadAddress(m_offset, GetAddressClass());
return true;
}
return false;
}
addr_t
Address::GetOpcodeLoadAddress (Target *target) const
{
addr_t code_addr = GetLoadAddress (target);
if (code_addr != LLDB_INVALID_ADDRESS)
code_addr = target->GetOpcodeLoadAddress (code_addr, GetAddressClass());
return code_addr;
}
bool
Address::SetOpcodeLoadAddress (lldb::addr_t load_addr, Target *target)
{
if (SetLoadAddress (load_addr, target))
{
if (target)
m_offset = target->GetOpcodeLoadAddress (m_offset, GetAddressClass());
return true;
}
return false;
}
bool
Address::Dump (Stream *s, ExecutionContextScope *exe_scope, DumpStyle style, DumpStyle fallback_style, uint32_t addr_size) const
{
// If the section was NULL, only load address is going to work unless we are
// trying to deref a pointer
SectionSP section_sp (GetSection());
if (!section_sp && style != DumpStyleResolvedPointerDescription)
style = DumpStyleLoadAddress;
ExecutionContext exe_ctx (exe_scope);
Target *target = exe_ctx.GetTargetPtr();
// If addr_byte_size is UINT32_MAX, then determine the correct address
// byte size for the process or default to the size of addr_t
if (addr_size == UINT32_MAX)
{
if (target)
addr_size = target->GetArchitecture().GetAddressByteSize ();
else
addr_size = sizeof(addr_t);
}
Address so_addr;
switch (style)
{
case DumpStyleInvalid:
return false;
case DumpStyleSectionNameOffset:
if (section_sp)
{
section_sp->DumpName(s);
s->Printf (" + %llu", m_offset);
}
else
{
s->Address(m_offset, addr_size);
}
break;
case DumpStyleSectionPointerOffset:
s->Printf("(Section *)%p + ", section_sp.get());
s->Address(m_offset, addr_size);
break;
case DumpStyleModuleWithFileAddress:
if (section_sp)
s->Printf("%s[", section_sp->GetModule()->GetFileSpec().GetFilename().AsCString());
// Fall through
case DumpStyleFileAddress:
{
addr_t file_addr = GetFileAddress();
if (file_addr == LLDB_INVALID_ADDRESS)
{
if (fallback_style != DumpStyleInvalid)
return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
}
s->Address (file_addr, addr_size);
if (style == DumpStyleModuleWithFileAddress && section_sp)
s->PutChar(']');
}
break;
case DumpStyleLoadAddress:
{
addr_t load_addr = GetLoadAddress (target);
if (load_addr == LLDB_INVALID_ADDRESS)
{
if (fallback_style != DumpStyleInvalid)
return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
}
s->Address (load_addr, addr_size);
}
break;
case DumpStyleResolvedDescription:
case DumpStyleResolvedDescriptionNoModule:
if (IsSectionOffset())
{
uint32_t pointer_size = 4;
ModuleSP module_sp (GetModule());
if (target)
pointer_size = target->GetArchitecture().GetAddressByteSize();
else if (module_sp)
pointer_size = module_sp->GetArchitecture().GetAddressByteSize();
bool showed_info = false;
if (section_sp)
{
SectionType sect_type = section_sp->GetType();
switch (sect_type)
{
case eSectionTypeData:
if (module_sp)
{
ObjectFile *objfile = module_sp->GetObjectFile();
if (objfile)
{
Symtab *symtab = objfile->GetSymtab();
if (symtab)
{
const addr_t file_Addr = GetFileAddress();
Symbol *symbol = symtab->FindSymbolContainingFileAddress (file_Addr);
if (symbol)
{
const char *symbol_name = symbol->GetName().AsCString();
if (symbol_name)
{
s->PutCString(symbol_name);
addr_t delta = file_Addr - symbol->GetAddress().GetFileAddress();
if (delta)
s->Printf(" + %llu", delta);
showed_info = true;
}
}
}
}
}
break;
case eSectionTypeDataCString:
// Read the C string from memory and display it
showed_info = true;
ReadCStringFromMemory (exe_scope, *this, s);
break;
case eSectionTypeDataCStringPointers:
{
if (ReadAddress (exe_scope, *this, pointer_size, so_addr))
{
#if VERBOSE_OUTPUT
s->PutCString("(char *)");
so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress);
s->PutCString(": ");
#endif
showed_info = true;
ReadCStringFromMemory (exe_scope, so_addr, s);
}
}
break;
case eSectionTypeDataObjCMessageRefs:
{
if (ReadAddress (exe_scope, *this, pointer_size, so_addr))
{
if (target && so_addr.IsSectionOffset())
{
SymbolContext func_sc;
target->GetImages().ResolveSymbolContextForAddress (so_addr,
eSymbolContextEverything,
func_sc);
if (func_sc.function || func_sc.symbol)
{
showed_info = true;
#if VERBOSE_OUTPUT
s->PutCString ("(objc_msgref *) -> { (func*)");
so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress);
#else
s->PutCString ("{ ");
#endif
Address cstr_addr(*this);
cstr_addr.SetOffset(cstr_addr.GetOffset() + pointer_size);
func_sc.DumpStopContext(s, exe_scope, so_addr, true, true, false);
if (ReadAddress (exe_scope, cstr_addr, pointer_size, so_addr))
{
#if VERBOSE_OUTPUT
s->PutCString("), (char *)");
so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress);
s->PutCString(" (");
#else
s->PutCString(", ");
#endif
ReadCStringFromMemory (exe_scope, so_addr, s);
}
#if VERBOSE_OUTPUT
s->PutCString(") }");
#else
s->PutCString(" }");
#endif
}
}
}
}
break;
case eSectionTypeDataObjCCFStrings:
{
Address cfstring_data_addr(*this);
cfstring_data_addr.SetOffset(cfstring_data_addr.GetOffset() + (2 * pointer_size));
if (ReadAddress (exe_scope, cfstring_data_addr, pointer_size, so_addr))
{
#if VERBOSE_OUTPUT
s->PutCString("(CFString *) ");
cfstring_data_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress);
s->PutCString(" -> @");
#else
s->PutChar('@');
#endif
if (so_addr.Dump(s, exe_scope, DumpStyleResolvedDescription))
showed_info = true;
}
}
break;
case eSectionTypeData4:
// Read the 4 byte data and display it
showed_info = true;
s->PutCString("(uint32_t) ");
DumpUInt (exe_scope, *this, 4, s);
break;
case eSectionTypeData8:
// Read the 8 byte data and display it
showed_info = true;
s->PutCString("(uint64_t) ");
DumpUInt (exe_scope, *this, 8, s);
break;
case eSectionTypeData16:
// Read the 16 byte data and display it
showed_info = true;
s->PutCString("(uint128_t) ");
DumpUInt (exe_scope, *this, 16, s);
break;
case eSectionTypeDataPointers:
// Read the pointer data and display it
{
if (ReadAddress (exe_scope, *this, pointer_size, so_addr))
{
s->PutCString ("(void *)");
so_addr.Dump(s, exe_scope, DumpStyleLoadAddress, DumpStyleFileAddress);
showed_info = true;
if (so_addr.IsSectionOffset())
{
SymbolContext pointer_sc;
if (target)
{
target->GetImages().ResolveSymbolContextForAddress (so_addr,
eSymbolContextEverything,
pointer_sc);
if (pointer_sc.function || pointer_sc.symbol)
{
s->PutCString(": ");
pointer_sc.DumpStopContext(s, exe_scope, so_addr, true, false, false);
}
}
}
}
}
break;
default:
break;
}
}
if (!showed_info)
{
if (module_sp)
{
SymbolContext sc;
module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextEverything, sc);
if (sc.function || sc.symbol)
{
bool show_stop_context = true;
const bool show_module = (style == DumpStyleResolvedDescription);
const bool show_fullpaths = false;
const bool show_inlined_frames = true;
if (sc.function == NULL && sc.symbol != NULL)
{
// If we have just a symbol make sure it is in the right section
if (sc.symbol->ValueIsAddress())
{
if (sc.symbol->GetAddress().GetSection() != GetSection())
{
// don't show the module if the symbol is a trampoline symbol
show_stop_context = false;
}
}
}
if (show_stop_context)
{
// We have a function or a symbol from the same
// sections as this address.
sc.DumpStopContext (s,
exe_scope,
*this,
show_fullpaths,
show_module,
show_inlined_frames);
}
else
{
// We found a symbol but it was in a different
// section so it isn't the symbol we should be
// showing, just show the section name + offset
Dump (s, exe_scope, DumpStyleSectionNameOffset);
}
}
}
}
}
else
{
if (fallback_style != DumpStyleInvalid)
return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
}
break;
case DumpStyleDetailedSymbolContext:
if (IsSectionOffset())
{
ModuleSP module_sp (GetModule());
if (module_sp)
{
SymbolContext sc;
module_sp->ResolveSymbolContextForAddress(*this, eSymbolContextEverything, sc);
if (sc.symbol)
{
// If we have just a symbol make sure it is in the same section
// as our address. If it isn't, then we might have just found
// the last symbol that came before the address that we are
// looking up that has nothing to do with our address lookup.
if (sc.symbol->ValueIsAddress() && sc.symbol->GetAddress().GetSection() != GetSection())
sc.symbol = NULL;
}
sc.GetDescription(s, eDescriptionLevelBrief, target);
if (sc.block)
{
bool can_create = true;
bool get_parent_variables = true;
bool stop_if_block_is_inlined_function = false;
VariableList variable_list;
sc.block->AppendVariables (can_create,
get_parent_variables,
stop_if_block_is_inlined_function,
&variable_list);
uint32_t num_variables = variable_list.GetSize();
for (uint32_t var_idx = 0; var_idx < num_variables; ++var_idx)
{
Variable *var = variable_list.GetVariableAtIndex (var_idx).get();
if (var && var->LocationIsValidForAddress (*this))
{
s->Indent();
s->Printf (" Variable: id = {0x%8.8llx}, name = \"%s\", type= \"%s\", location =",
var->GetID(),
var->GetName().GetCString(),
var->GetType()->GetName().GetCString());
var->DumpLocationForAddress(s, *this);
s->PutCString(", decl = ");
var->GetDeclaration().DumpStopContext(s, false);
s->EOL();
}
}
}
}
}
else
{
if (fallback_style != DumpStyleInvalid)
return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
}
break;
case DumpStyleResolvedPointerDescription:
{
Process *process = exe_ctx.GetProcessPtr();
if (process)
{
addr_t load_addr = GetLoadAddress (target);
if (load_addr != LLDB_INVALID_ADDRESS)
{
Error memory_error;
addr_t dereferenced_load_addr = process->ReadPointerFromMemory(load_addr, memory_error);
if (dereferenced_load_addr != LLDB_INVALID_ADDRESS)
{
Address dereferenced_addr;
if (dereferenced_addr.SetLoadAddress(dereferenced_load_addr, target))
{
StreamString strm;
if (dereferenced_addr.Dump (&strm, exe_scope, DumpStyleResolvedDescription, DumpStyleInvalid, addr_size))
{
s->Address (dereferenced_load_addr, addr_size, " -> ", " ");
s->Write(strm.GetData(), strm.GetSize());
return true;
}
}
}
}
}
if (fallback_style != DumpStyleInvalid)
return Dump (s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
}
break;
}
return true;
}
uint32_t
Address::CalculateSymbolContext (SymbolContext *sc, uint32_t resolve_scope) const
{
sc->Clear();
// Absolute addresses don't have enough information to reconstruct even their target.
SectionSP section_sp (GetSection());
if (section_sp)
{
ModuleSP module_sp (section_sp->GetModule());
if (module_sp)
{
sc->module_sp = module_sp;
if (sc->module_sp)
return sc->module_sp->ResolveSymbolContextForAddress (*this, resolve_scope, *sc);
}
}
return 0;
}
ModuleSP
Address::CalculateSymbolContextModule () const
{
SectionSP section_sp (GetSection());
if (section_sp)
return section_sp->GetModule();
return ModuleSP();
}
CompileUnit *
Address::CalculateSymbolContextCompileUnit () const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SymbolContext sc;
sc.module_sp = section_sp->GetModule();
if (sc.module_sp)
{
sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextCompUnit, sc);
return sc.comp_unit;
}
}
return NULL;
}
Function *
Address::CalculateSymbolContextFunction () const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SymbolContext sc;
sc.module_sp = section_sp->GetModule();
if (sc.module_sp)
{
sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextFunction, sc);
return sc.function;
}
}
return NULL;
}
Block *
Address::CalculateSymbolContextBlock () const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SymbolContext sc;
sc.module_sp = section_sp->GetModule();
if (sc.module_sp)
{
sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextBlock, sc);
return sc.block;
}
}
return NULL;
}
Symbol *
Address::CalculateSymbolContextSymbol () const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SymbolContext sc;
sc.module_sp = section_sp->GetModule();
if (sc.module_sp)
{
sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextSymbol, sc);
return sc.symbol;
}
}
return NULL;
}
bool
Address::CalculateSymbolContextLineEntry (LineEntry &line_entry) const
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SymbolContext sc;
sc.module_sp = section_sp->GetModule();
if (sc.module_sp)
{
sc.module_sp->ResolveSymbolContextForAddress (*this, eSymbolContextLineEntry, sc);
if (sc.line_entry.IsValid())
{
line_entry = sc.line_entry;
return true;
}
}
}
line_entry.Clear();
return false;
}
int
Address::CompareFileAddress (const Address& a, const Address& b)
{
addr_t a_file_addr = a.GetFileAddress();
addr_t b_file_addr = b.GetFileAddress();
if (a_file_addr < b_file_addr)
return -1;
if (a_file_addr > b_file_addr)
return +1;
return 0;
}
int
Address::CompareLoadAddress (const Address& a, const Address& b, Target *target)
{
assert (target != NULL);
addr_t a_load_addr = a.GetLoadAddress (target);
addr_t b_load_addr = b.GetLoadAddress (target);
if (a_load_addr < b_load_addr)
return -1;
if (a_load_addr > b_load_addr)
return +1;
return 0;
}
int
Address::CompareModulePointerAndOffset (const Address& a, const Address& b)
{
ModuleSP a_module_sp (a.GetModule());
ModuleSP b_module_sp (b.GetModule());
Module *a_module = a_module_sp.get();
Module *b_module = b_module_sp.get();
if (a_module < b_module)
return -1;
if (a_module > b_module)
return +1;
// Modules are the same, just compare the file address since they should
// be unique
addr_t a_file_addr = a.GetFileAddress();
addr_t b_file_addr = b.GetFileAddress();
if (a_file_addr < b_file_addr)
return -1;
if (a_file_addr > b_file_addr)
return +1;
return 0;
}
size_t
Address::MemorySize () const
{
// Noting special for the memory size of a single Address object,
// it is just the size of itself.
return sizeof(Address);
}
//----------------------------------------------------------------------
// NOTE: Be careful using this operator. It can correctly compare two
// addresses from the same Module correctly. It can't compare two
// addresses from different modules in any meaningful way, but it will
// compare the module pointers.
//
// To sum things up:
// - works great for addresses within the same module
// - it works for addresses across multiple modules, but don't expect the
// address results to make much sense
//
// This basically lets Address objects be used in ordered collection
// classes.
//----------------------------------------------------------------------
bool
lldb_private::operator< (const Address& lhs, const Address& rhs)
{
ModuleSP lhs_module_sp (lhs.GetModule());
ModuleSP rhs_module_sp (rhs.GetModule());
Module *lhs_module = lhs_module_sp.get();
Module *rhs_module = rhs_module_sp.get();
if (lhs_module == rhs_module)
{
// Addresses are in the same module, just compare the file addresses
return lhs.GetFileAddress() < rhs.GetFileAddress();
}
else
{
// The addresses are from different modules, just use the module
// pointer value to get consistent ordering
return lhs_module < rhs_module;
}
}
bool
lldb_private::operator> (const Address& lhs, const Address& rhs)
{
ModuleSP lhs_module_sp (lhs.GetModule());
ModuleSP rhs_module_sp (rhs.GetModule());
Module *lhs_module = lhs_module_sp.get();
Module *rhs_module = rhs_module_sp.get();
if (lhs_module == rhs_module)
{
// Addresses are in the same module, just compare the file addresses
return lhs.GetFileAddress() > rhs.GetFileAddress();
}
else
{
// The addresses are from different modules, just use the module
// pointer value to get consistent ordering
return lhs_module > rhs_module;
}
}
// The operator == checks for exact equality only (same section, same offset)
bool
lldb_private::operator== (const Address& a, const Address& rhs)
{
return a.GetSection() == rhs.GetSection() &&
a.GetOffset() == rhs.GetOffset();
}
// The operator != checks for exact inequality only (differing section, or
// different offset)
bool
lldb_private::operator!= (const Address& a, const Address& rhs)
{
return a.GetSection() != rhs.GetSection() ||
a.GetOffset() != rhs.GetOffset();
}
bool
Address::IsLinkedAddress () const
{
SectionSP section_sp (GetSection());
return section_sp && section_sp->GetLinkedSection();
}
void
Address::ResolveLinkedAddress ()
{
SectionSP section_sp (GetSection());
if (section_sp)
{
SectionSP linked_section_sp (section_sp->GetLinkedSection());
if (linked_section_sp)
{
m_offset += section_sp->GetLinkedOffset();
m_section_wp = linked_section_sp;
}
}
}
AddressClass
Address::GetAddressClass () const
{
ModuleSP module_sp (GetModule());
if (module_sp)
{
ObjectFile *obj_file = module_sp->GetObjectFile();
if (obj_file)
return obj_file->GetAddressClass (GetFileAddress());
}
return eAddressClassUnknown;
}
bool
Address::SetLoadAddress (lldb::addr_t load_addr, Target *target)
{
if (target && target->GetSectionLoadList().ResolveLoadAddress(load_addr, *this))
return true;
m_section_wp.reset();
m_offset = load_addr;
return false;
}
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