C++ SymbolContextList::GetContextAtIndex方法代码示例

static bool
KeepLookingInDylinker (SymbolContextList &sc_list, size_t start_idx)
{
    bool keep_looking = true;
    if (sc_list.GetSize() == start_idx)
    {
        return true;
    }

    SymbolContext sc;
    size_t num_symbols = sc_list.GetSize();
    for (size_t idx = start_idx; idx < num_symbols; idx++)
    {
        sc_list.GetContextAtIndex(idx, sc);
        if (sc.symbol && sc.symbol->GetType() != lldb::eSymbolTypeUndefined)
        {
            keep_looking = false;
            break;
        }
        // If we have a function it's not going to be an undefined symbol...
        if (sc.function)
        {
            keep_looking = false;
            break;
        }
    }
    return keep_looking;
}

size_t
ModuleList::FindFunctionSymbols (const ConstString &name,
                                 uint32_t name_type_mask,
                                 SymbolContextList& sc_list)
{
    const size_t old_size = sc_list.GetSize();

    if (name_type_mask & eFunctionNameTypeAuto)
    {
        ConstString lookup_name;
        uint32_t lookup_name_type_mask = 0;
        bool match_name_after_lookup = false;
        Module::PrepareForFunctionNameLookup (name, name_type_mask,
                                              eLanguageTypeUnknown, // TODO: add support
                                              lookup_name,
                                              lookup_name_type_mask,
                                              match_name_after_lookup);
    
        Mutex::Locker locker(m_modules_mutex);
        collection::const_iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            (*pos)->FindFunctionSymbols (lookup_name,
                                   lookup_name_type_mask,
                                   sc_list);
        }
        
        if (match_name_after_lookup)
        {
            SymbolContext sc;
            size_t i = old_size;
            while (i < sc_list.GetSize())
            {
                if (sc_list.GetContextAtIndex(i, sc))
                {
                    const char *func_name = sc.GetFunctionName().GetCString();
                    if (func_name != nullptr && strstr(func_name, name.GetCString()) == nullptr)
                    {
                        // Remove the current context
                        sc_list.RemoveContextAtIndex(i);
                        // Don't increment i and continue in the loop
                        continue;
                    }
                }
                ++i;
            }
        }
    }
    else
    {
        Mutex::Locker locker(m_modules_mutex);
        collection::const_iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            (*pos)->FindFunctionSymbols (name, name_type_mask, sc_list);
        }
    }

    return sc_list.GetSize() - old_size;
}

size_t
Disassembler::Disassemble
(
    Debugger &debugger,
    const ArchSpec &arch,
    const ExecutionContext &exe_ctx,
    SymbolContextList &sc_list,
    uint32_t num_mixed_context_lines,
    bool show_bytes,
    Stream &strm
)
{
    size_t success_count = 0;
    const size_t count = sc_list.GetSize();
    SymbolContext sc;
    AddressRange range;
    for (size_t i=0; i<count; ++i)
    {
        if (sc_list.GetContextAtIndex(i, sc) == false)
            break;
        if (sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, range))
        {
            if (Disassemble (debugger, arch, exe_ctx, range, num_mixed_context_lines, show_bytes, strm))
            {
                ++success_count;
                strm.EOL();
            }
        }
    }
    return success_count;
}

bool
lldb_private::operator== (const SymbolContextList& lhs, const SymbolContextList& rhs)
{
    const uint32_t size = lhs.GetSize();
    if (size != rhs.GetSize())
        return false;
    
    SymbolContext lhs_sc;
    SymbolContext rhs_sc;
    for (uint32_t i=0; i<size; ++i)
    {
        lhs.GetContextAtIndex(i, lhs_sc);
        rhs.GetContextAtIndex(i, rhs_sc);
        if (lhs_sc != rhs_sc)
            return false;
    }
    return true;
}

ThreadPlanCallFunction::ThreadPlanCallFunction (Thread &thread,
                                                Address &function,
                                                ValueList &args,
                                                bool stop_other_threads,
                                                bool discard_on_error) :
    ThreadPlan (ThreadPlan::eKindCallFunction, "Call function plan", thread, eVoteNoOpinion, eVoteNoOpinion),
    m_valid (false),
    m_stop_other_threads (stop_other_threads),
    m_arg_addr (0),
    m_args (&args),
    m_process (thread.GetProcess()),
    m_thread (thread)
{
    
    SetOkayToDiscard (discard_on_error);
    
    Process& process = thread.GetProcess();
    Target& target = process.GetTarget();
    const ABI *abi = process.GetABI();
    
    if(!abi)
        return;
    
    lldb::addr_t spBelowRedZone = thread.GetRegisterContext()->GetSP() - abi->GetRedZoneSize();
    
    SymbolContextList contexts;
    SymbolContext context;
    ModuleSP executableModuleSP (target.GetExecutableModule());
    
    if (!executableModuleSP ||
        !executableModuleSP->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts))
        return;
    
    contexts.GetContextAtIndex(0, context);
    
    m_start_addr = context.symbol->GetValue();
    lldb::addr_t StartLoadAddr = m_start_addr.GetLoadAddress(&process);
    
    if(!thread.SaveFrameZeroState(m_register_backup))
        return;
    
    m_function_addr = function;
    lldb::addr_t FunctionLoadAddr = m_function_addr.GetLoadAddress(&process);
    
    if (!abi->PrepareNormalCall(thread, 
                                spBelowRedZone, 
                                FunctionLoadAddr, 
                                StartLoadAddr, 
                                *m_args))
        return;
    
    m_valid = true;    
}

size_t
Disassembler::Disassemble
(
    Debugger &debugger,
    const ArchSpec &arch,
    const char *plugin_name,
    const char *flavor,
    const ExecutionContext &exe_ctx,
    SymbolContextList &sc_list,
    uint32_t num_instructions,
    uint32_t num_mixed_context_lines,
    uint32_t options,
    Stream &strm
)
{
    size_t success_count = 0;
    const size_t count = sc_list.GetSize();
    SymbolContext sc;
    AddressRange range;
    const uint32_t scope = eSymbolContextBlock | eSymbolContextFunction | eSymbolContextSymbol;
    const bool use_inline_block_range = true;
    for (size_t i=0; i<count; ++i)
    {
        if (sc_list.GetContextAtIndex(i, sc) == false)
            break;
        for (uint32_t range_idx = 0; sc.GetAddressRange(scope, range_idx, use_inline_block_range, range); ++range_idx)
        {
            if (Disassemble (debugger, 
                             arch, 
                             plugin_name,
                             flavor,
                             exe_ctx, 
                             range, 
                             num_instructions,
                             num_mixed_context_lines, 
                             options, 
                             strm))
            {
                ++success_count;
                strm.EOL();
            }
        }
    }
    return success_count;
}

Address *
AppleObjCRuntime::GetPrintForDebuggerAddr()
{
    if (!m_PrintForDebugger_addr.get())
    {
        const ModuleList &modules = m_process->GetTarget().GetImages();
        
        SymbolContextList contexts;
        SymbolContext context;
        
        if ((!modules.FindSymbolsWithNameAndType(ConstString ("_NSPrintForDebugger"), eSymbolTypeCode, contexts)) &&
           (!modules.FindSymbolsWithNameAndType(ConstString ("_CFPrintForDebugger"), eSymbolTypeCode, contexts)))
            return NULL;
        
        contexts.GetContextAtIndex(0, context);
        
        m_PrintForDebugger_addr.reset(new Address(context.symbol->GetAddress()));
    }
    
    return m_PrintForDebugger_addr.get();
}

void
BreakpointResolverName::LookupInfo::Prune (SymbolContextList &sc_list, size_t start_idx) const
{
    if (match_name_after_lookup && name)
    {
        SymbolContext sc;
        size_t i = start_idx;
        while (i < sc_list.GetSize())
        {
            if (!sc_list.GetContextAtIndex(i, sc))
                break;
            ConstString full_name (sc.GetFunctionName());
            if (full_name && ::strstr(full_name.GetCString(), name.GetCString()) == NULL)
            {
                sc_list.RemoveContextAtIndex(i);
            }
            else
            {
                ++i;
            }
        }
    }
}

void
BreakpointResolver::SetSCMatchesByLine (SearchFilter &filter, SymbolContextList &sc_list, bool skip_prologue, const char *log_ident)
{
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));

    while (sc_list.GetSize() > 0)
    {
        SymbolContextList tmp_sc_list;
        unsigned current_idx = 0;
        SymbolContext sc;
        bool first_entry = true;
        
        FileSpec match_file_spec;
        FileSpec match_original_file_spec;
        uint32_t closest_line_number = UINT32_MAX;

        // Pull out the first entry, and all the others that match its file spec, and stuff them in the tmp list.
        while (current_idx < sc_list.GetSize())
        {
            bool matches;
            
            sc_list.GetContextAtIndex (current_idx, sc);
            if (first_entry)
            {
                match_file_spec = sc.line_entry.file;
                match_original_file_spec = sc.line_entry.original_file;
                matches = true;
                first_entry = false;
            }
            else
                matches = ((sc.line_entry.file == match_file_spec) ||
                           (sc.line_entry.original_file == match_original_file_spec));
            
            if (matches)
            {
                tmp_sc_list.Append (sc);
                sc_list.RemoveContextAtIndex(current_idx);
                
                // ResolveSymbolContext will always return a number that is >= the line number you pass in.
                // So the smaller line number is always better.
                if (sc.line_entry.line < closest_line_number)
                    closest_line_number = sc.line_entry.line;
            }
            else
                current_idx++;
        }
            
        // Okay, we've found the closest line number match, now throw away all the others:
        
        current_idx = 0;
        while (current_idx < tmp_sc_list.GetSize())
        {
            if (tmp_sc_list.GetContextAtIndex(current_idx, sc))
            {
                if (sc.line_entry.line != closest_line_number)
                    tmp_sc_list.RemoveContextAtIndex(current_idx);
                else
                    current_idx++;
            }
        }
        
        // Next go through and see if there are line table entries that are contiguous, and if so keep only the
        // first of the contiguous range:
        
        current_idx = 0;
        std::map<Block *, lldb::addr_t> blocks_with_breakpoints;
        
        while (current_idx < tmp_sc_list.GetSize())
        {
            if (tmp_sc_list.GetContextAtIndex(current_idx, sc))
            {
                if (blocks_with_breakpoints.find (sc.block) != blocks_with_breakpoints.end())
                    tmp_sc_list.RemoveContextAtIndex(current_idx);
                else
                {
                    blocks_with_breakpoints.insert (std::pair<Block *, lldb::addr_t>(sc.block, sc.line_entry.range.GetBaseAddress().GetFileAddress()));
                    current_idx++;
                }
            }
        }
        
        // and make breakpoints out of the closest line number match.
        
        uint32_t tmp_sc_list_size = tmp_sc_list.GetSize();
        
        for (uint32_t i = 0; i < tmp_sc_list_size; i++)
        {
            if (tmp_sc_list.GetContextAtIndex(i, sc))
            {
                Address line_start = sc.line_entry.range.GetBaseAddress();
                if (line_start.IsValid())
                {
                    if (filter.AddressPasses(line_start))
                    {
                        // If the line number is before the prologue end, move it there...
                        bool skipped_prologue = false;
                        if (skip_prologue)
                        {
                            if (sc.function)
                            {
//.........这里部分代码省略.........

size_t
ModuleList::FindFunctions (const ConstString &name, 
                           uint32_t name_type_mask, 
                           bool include_symbols,
                           bool include_inlines,
                           bool append, 
                           SymbolContextList &sc_list) const
{
    if (!append)
        sc_list.Clear();
    
    const size_t old_size = sc_list.GetSize();
    
    if (name_type_mask & eFunctionNameTypeAuto)
    {
        ConstString lookup_name;
        uint32_t lookup_name_type_mask = 0;
        bool match_name_after_lookup = false;
        Module::PrepareForFunctionNameLookup (name, name_type_mask,
                                              lookup_name,
                                              lookup_name_type_mask,
                                              match_name_after_lookup);
    
        Mutex::Locker locker(m_modules_mutex);
        collection::const_iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            (*pos)->FindFunctions (lookup_name,
                                   NULL,
                                   lookup_name_type_mask,
                                   include_symbols,
                                   include_inlines,
                                   true,
                                   sc_list);
        }
        
        if (match_name_after_lookup)
        {
            SymbolContext sc;
            size_t i = old_size;
            while (i<sc_list.GetSize())
            {
                if (sc_list.GetContextAtIndex(i, sc))
                {
                    const char *func_name = sc.GetFunctionName().GetCString();
                    if (func_name && strstr (func_name, name.GetCString()) == NULL)
                    {
                        // Remove the current context
                        sc_list.RemoveContextAtIndex(i);
                        // Don't increment i and continue in the loop
                        continue;
                    }
                }
                ++i;
            }
        }

    }
    else
    {
        Mutex::Locker locker(m_modules_mutex);
        collection::const_iterator pos, end = m_modules.end();
        for (pos = m_modules.begin(); pos != end; ++pos)
        {
            (*pos)->FindFunctions (name, NULL, name_type_mask, include_symbols, include_inlines, true, sc_list);
        }
    }
    return sc_list.GetSize() - old_size;
}