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| //===-- BreakpointResolverAddress.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/Breakpoint/BreakpointResolverAddress.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb;
using namespace lldb_private;
// BreakpointResolverAddress:
BreakpointResolverAddress::BreakpointResolverAddress(
Breakpoint *bkpt, const Address &addr, const FileSpec &module_spec)
: BreakpointResolver(bkpt, BreakpointResolver::AddressResolver),
m_addr(addr), m_resolved_addr(LLDB_INVALID_ADDRESS),
m_module_filespec(module_spec) {}
BreakpointResolverAddress::BreakpointResolverAddress(Breakpoint *bkpt,
const Address &addr)
: BreakpointResolver(bkpt, BreakpointResolver::AddressResolver),
m_addr(addr), m_resolved_addr(LLDB_INVALID_ADDRESS), m_module_filespec() {
}
BreakpointResolverAddress::~BreakpointResolverAddress() {}
BreakpointResolver *BreakpointResolverAddress::CreateFromStructuredData(
Breakpoint *bkpt, const StructuredData::Dictionary &options_dict,
Status &error) {
llvm::StringRef module_name;
lldb::addr_t addr_offset;
FileSpec module_filespec;
bool success;
success = options_dict.GetValueForKeyAsInteger(
GetKey(OptionNames::AddressOffset), addr_offset);
if (!success) {
error.SetErrorString("BRFL::CFSD: Couldn't find address offset entry.");
return nullptr;
}
Address address(addr_offset);
success = options_dict.HasKey(GetKey(OptionNames::ModuleName));
if (success) {
success = options_dict.GetValueForKeyAsString(
GetKey(OptionNames::ModuleName), module_name);
if (!success) {
error.SetErrorString("BRA::CFSD: Couldn't read module name entry.");
return nullptr;
}
module_filespec.SetFile(module_name, FileSpec::Style::native);
}
return new BreakpointResolverAddress(bkpt, address, module_filespec);
}
StructuredData::ObjectSP
BreakpointResolverAddress::SerializeToStructuredData() {
StructuredData::DictionarySP options_dict_sp(
new StructuredData::Dictionary());
SectionSP section_sp = m_addr.GetSection();
if (section_sp) {
ModuleSP module_sp = section_sp->GetModule();
ConstString module_name;
if (module_sp)
module_name.SetCString(module_name.GetCString());
options_dict_sp->AddStringItem(GetKey(OptionNames::ModuleName),
module_name.GetCString());
options_dict_sp->AddIntegerItem(GetKey(OptionNames::AddressOffset),
m_addr.GetOffset());
} else {
options_dict_sp->AddIntegerItem(GetKey(OptionNames::AddressOffset),
m_addr.GetOffset());
if (m_module_filespec) {
options_dict_sp->AddStringItem(GetKey(OptionNames::ModuleName),
m_module_filespec.GetPath());
}
}
return WrapOptionsDict(options_dict_sp);
return StructuredData::ObjectSP();
}
void BreakpointResolverAddress::ResolveBreakpoint(SearchFilter &filter) {
// If the address is not section relative, then we should not try to re-
// resolve it, it is just some random address and we wouldn't know what to do
// on reload. But if it is section relative, we need to re-resolve it since
// the section it's in may have shifted on re-run.
bool re_resolve = false;
if (m_addr.GetSection() || m_module_filespec)
re_resolve = true;
else if (m_breakpoint->GetNumLocations() == 0)
re_resolve = true;
if (re_resolve)
BreakpointResolver::ResolveBreakpoint(filter);
}
void BreakpointResolverAddress::ResolveBreakpointInModules(
SearchFilter &filter, ModuleList &modules) {
// See comment in ResolveBreakpoint.
bool re_resolve = false;
if (m_addr.GetSection())
re_resolve = true;
else if (m_breakpoint->GetNumLocations() == 0)
re_resolve = true;
if (re_resolve)
BreakpointResolver::ResolveBreakpointInModules(filter, modules);
}
Searcher::CallbackReturn BreakpointResolverAddress::SearchCallback(
SearchFilter &filter, SymbolContext &context, Address *addr) {
assert(m_breakpoint != nullptr);
if (filter.AddressPasses(m_addr)) {
if (m_breakpoint->GetNumLocations() == 0) {
// If the address is just an offset, and we're given a module, see if we
// can find the appropriate module loaded in the binary, and fix up
// m_addr to use that.
if (!m_addr.IsSectionOffset() && m_module_filespec) {
Target &target = m_breakpoint->GetTarget();
ModuleSpec module_spec(m_module_filespec);
ModuleSP module_sp = target.GetImages().FindFirstModule(module_spec);
if (module_sp) {
Address tmp_address;
if (module_sp->ResolveFileAddress(m_addr.GetOffset(), tmp_address))
m_addr = tmp_address;
}
}
m_resolved_addr = m_addr.GetLoadAddress(&m_breakpoint->GetTarget());
BreakpointLocationSP bp_loc_sp(AddLocation(m_addr));
if (bp_loc_sp && !m_breakpoint->IsInternal()) {
StreamString s;
bp_loc_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose);
Log *log(
lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
LLDB_LOGF(log, "Added location: %s\n", s.GetData());
}
} else {
BreakpointLocationSP loc_sp = m_breakpoint->GetLocationAtIndex(0);
lldb::addr_t cur_load_location =
m_addr.GetLoadAddress(&m_breakpoint->GetTarget());
if (cur_load_location != m_resolved_addr) {
m_resolved_addr = cur_load_location;
loc_sp->ClearBreakpointSite();
loc_sp->ResolveBreakpointSite();
}
}
}
return Searcher::eCallbackReturnStop;
}
lldb::SearchDepth BreakpointResolverAddress::GetDepth() {
return lldb::eSearchDepthTarget;
}
void BreakpointResolverAddress::GetDescription(Stream *s) {
s->PutCString("address = ");
m_addr.Dump(s, m_breakpoint->GetTarget().GetProcessSP().get(),
Address::DumpStyleModuleWithFileAddress,
Address::DumpStyleLoadAddress);
}
void BreakpointResolverAddress::Dump(Stream *s) const {}
lldb::BreakpointResolverSP
BreakpointResolverAddress::CopyForBreakpoint(Breakpoint &breakpoint) {
lldb::BreakpointResolverSP ret_sp(
new BreakpointResolverAddress(&breakpoint, m_addr));
return ret_sp;
}
|