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llvm-project/lldb/source/Core/Address.cpp

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//===-- Address.cpp ---------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/Address.h"
#include "lldb/Core/DumpDataExtractor.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/Section.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/Declaration.h"
#include "lldb/Symbol/LineEntry.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/Symtab.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/ExecutionContextScope.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/Endian.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Compiler.h"
#include <cstdint>
#include <memory>
#include <vector>
#include <assert.h>
#include <inttypes.h>
#include <string.h>
namespace lldb_private {
class CompileUnit;
}
namespace lldb_private {
class Function;
}
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 == nullptr)
return 0;
TargetSP target_sp(exe_scope->CalculateTarget());
if (target_sp) {
Status 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 == nullptr)
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 == nullptr || 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);
lldb::offset_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 == nullptr)
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 == nullptr || 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);
DumpDataExtractor(data, 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 == nullptr)
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), 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;
DumpDataExtractor(data, 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;
} else if (SectionWasDeletedPrivate()) {
// Used to have a valid section but it got deleted so the offset doesn't
// mean anything without the section
return LLDB_INVALID_ADDRESS;
}
// 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) {
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;
}
}
} else if (SectionWasDeletedPrivate()) {
// Used to have a valid section but it got deleted so the offset doesn't
// mean anything without the section
return LLDB_INVALID_ADDRESS;
} else {
// We don't have a section so the offset is the load address
return m_offset;
}
// The section isn't resolved or an invalid target was passed in so we can't
// return a valid load address.
return LLDB_INVALID_ADDRESS;
}
addr_t Address::GetCallableLoadAddress(Target *target, bool is_indirect) const {
addr_t code_addr = LLDB_INVALID_ADDRESS;
if (is_indirect && target) {
ProcessSP processSP = target->GetProcessSP();
Status error;
if (processSP) {
code_addr = processSP->ResolveIndirectFunction(this, error);
if (!error.Success())
code_addr = LLDB_INVALID_ADDRESS;
}
} else {
code_addr = GetLoadAddress(target);
}
if (code_addr == LLDB_INVALID_ADDRESS)
return code_addr;
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,
AddressClass addr_class) const {
addr_t code_addr = GetLoadAddress(target);
if (code_addr != LLDB_INVALID_ADDRESS) {
if (addr_class == AddressClass::eInvalid)
addr_class = GetAddressClass();
code_addr = target->GetOpcodeLoadAddress(code_addr, addr_class);
}
return code_addr;
}
bool Address::SetOpcodeLoadAddress(lldb::addr_t load_addr, Target *target,
AddressClass addr_class,
bool allow_section_end) {
if (SetLoadAddress(load_addr, target, allow_section_end)) {
if (target) {
if (addr_class == AddressClass::eInvalid)
addr_class = GetAddressClass();
m_offset = target->GetOpcodeLoadAddress(m_offset, addr_class);
}
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 nullptr, 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(" + %" PRIu64, m_offset);
} else {
s->Address(m_offset, addr_size);
}
break;
case DumpStyleSectionPointerOffset:
s->Printf("(Section *)%p + ", static_cast<void *>(section_sp.get()));
s->Address(m_offset, addr_size);
break;
case DumpStyleModuleWithFileAddress:
if (section_sp) {
ModuleSP module_sp = section_sp->GetModule();
if (module_sp)
s->Printf("%s[", module_sp->GetFileSpec().GetFilename().AsCString(
"<Unknown>"));
else
s->Printf("%s[", "<Unknown>");
}
LLVM_FALLTHROUGH;
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);
/*
* MIPS:
* Display address in compressed form for MIPS16 or microMIPS
* if the address belongs to AddressClass::eCodeAlternateISA.
*/
if (target) {
const llvm::Triple::ArchType llvm_arch =
target->GetArchitecture().GetMachine();
if (llvm_arch == llvm::Triple::mips ||
llvm_arch == llvm::Triple::mipsel ||
llvm_arch == llvm::Triple::mips64 ||
llvm_arch == llvm::Triple::mips64el)
load_addr = GetCallableLoadAddress(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:
case DumpStyleResolvedDescriptionNoFunctionArguments:
case DumpStyleNoFunctionName:
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) {
SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
if (sym_vendor) {
Symtab *symtab = sym_vendor->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->GetAddressRef().GetFileAddress();
if (delta)
s->Printf(" + %" PRIu64, 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 != nullptr || func_sc.symbol != nullptr) {
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, true, true);
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 != nullptr ||
pointer_sc.symbol != nullptr) {
s->PutCString(": ");
pointer_sc.DumpStopContext(s, exe_scope, so_addr, true, false,
false, true, true);
}
}
}
}
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;
const bool show_function_arguments =
(style != DumpStyleResolvedDescriptionNoFunctionArguments);
const bool show_function_name = (style != DumpStyleNoFunctionName);
if (sc.function == nullptr && sc.symbol != nullptr) {
// If we have just a symbol make sure it is in the right section
if (sc.symbol->ValueIsAddress()) {
if (sc.symbol->GetAddressRef().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,
show_function_arguments, show_function_name);
} 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 | eSymbolContextVariable, 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->GetAddressRef().GetSection() != GetSection())
sc.symbol = nullptr;
}
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 *) { return true; },
&variable_list);
const size_t num_variables = variable_list.GetSize();
for (size_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%8.8" PRIx64 "}, name = \"%s\"",
var->GetID(), var->GetName().GetCString());
Type *type = var->GetType();
if (type)
s->Printf(", type = \"%s\"", type->GetName().GetCString());
else
s->PutCString(", type = <unknown>");
s->PutCString(", location = ");
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) {
Status 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.GetString().data(), strm.GetSize());
return true;
}
}
}
}
}
if (fallback_style != DumpStyleInvalid)
return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
return false;
} break;
}
return true;
}
bool Address::SectionWasDeleted() const {
if (GetSection())
return false;
return SectionWasDeletedPrivate();
}
bool Address::SectionWasDeletedPrivate() const {
lldb::SectionWP empty_section_wp;
// If either call to "std::weak_ptr::owner_before(...) value returns true,
// this indicates that m_section_wp once contained (possibly still does) a
// reference to a valid shared pointer. This helps us know if we had a valid
// reference to a section which is now invalid because the module it was in
// was unloaded/deleted, or if the address doesn't have a valid reference to
// a section.
return empty_section_wp.owner_before(m_section_wp) ||
m_section_wp.owner_before(empty_section_wp);
}
uint32_t
Address::CalculateSymbolContext(SymbolContext *sc,
SymbolContextItem resolve_scope) const {
sc->Clear(false);
// 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 nullptr;
}
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 nullptr;
}
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 nullptr;
}
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 nullptr;
}
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 != nullptr);
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.GetOffset() == rhs.GetOffset() && a.GetSection() == rhs.GetSection();
}
// The operator != checks for exact inequality only (differing section, or
// different offset)
bool lldb_private::operator!=(const Address &a, const Address &rhs) {
return a.GetOffset() != rhs.GetOffset() || a.GetSection() != rhs.GetSection();
}
AddressClass Address::GetAddressClass() const {
ModuleSP module_sp(GetModule());
if (module_sp) {
ObjectFile *obj_file = module_sp->GetObjectFile();
if (obj_file) {
// Give the symbol vendor a chance to add to the unified section list
// and to symtab from symbol file
if (SymbolVendor *vendor = module_sp->GetSymbolVendor())
vendor->GetSymtab();
return obj_file->GetAddressClass(GetFileAddress());
}
}
return AddressClass::eUnknown;
}
bool Address::SetLoadAddress(lldb::addr_t load_addr, Target *target,
bool allow_section_end) {
if (target && target->GetSectionLoadList().ResolveLoadAddress(
load_addr, *this, allow_section_end))
return true;
m_section_wp.reset();
m_offset = load_addr;
return false;
}
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