xref: /llvm-project-15.0.7/lldb/source/Expression/ExpressionVariable.cpp (revision bd4dc693)

//===-- ExpressionVariable.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/Log.h"
#include "lldb/Expression/ExpressionVariable.h"
#include "lldb/Expression/IRExecutionUnit.h"

using namespace lldb_private;

ExpressionVariable::~ExpressionVariable()
{
}

uint8_t *
ExpressionVariable::GetValueBytes()
{
    const size_t byte_size = m_frozen_sp->GetByteSize();
    if (byte_size > 0)
    {
        if (m_frozen_sp->GetDataExtractor().GetByteSize() < byte_size)
        {
            m_frozen_sp->GetValue().ResizeData(byte_size);
            m_frozen_sp->GetValue().GetData (m_frozen_sp->GetDataExtractor());
        }
        return const_cast<uint8_t *>(m_frozen_sp->GetDataExtractor().GetDataStart());
    }
    return NULL;
}

PersistentExpressionState::~PersistentExpressionState ()
{
}

lldb::addr_t
PersistentExpressionState::LookupSymbol (const ConstString &name)
{
    SymbolMap::iterator si = m_symbol_map.find(name.GetCString());

    if (si != m_symbol_map.end())
        return si->second;
    else
        return LLDB_INVALID_ADDRESS;
}


void
PersistentExpressionState::RegisterExecutionUnit (lldb::IRExecutionUnitSP &execution_unit_sp)
{
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));

    m_execution_units.insert(execution_unit_sp);

    if (log)
        log->Printf ("Registering JITted Functions:\n");

    for (const IRExecutionUnit::JittedFunction &jitted_function : execution_unit_sp->GetJittedFunctions())
    {
        if (jitted_function.m_external &&
            jitted_function.m_name != execution_unit_sp->GetFunctionName() &&
            jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS)
        {
            m_symbol_map[jitted_function.m_name.GetCString()] = jitted_function.m_remote_addr;
            if (log)
                log->Printf ("  Function: %s at 0x%" PRIx64 ".", jitted_function.m_name.GetCString(), jitted_function.m_remote_addr);
        }
    }

    if (log)
        log->Printf ("Registering JIIted Symbols:\n");

    for (const IRExecutionUnit::JittedGlobalVariable &global_var : execution_unit_sp->GetJittedGlobalVariables())
    {
        if (global_var.m_remote_addr != LLDB_INVALID_ADDRESS)
        {
            // Demangle the name before inserting it, so that lookups by the ConstStr of the demangled name
            // will find the mangled one (needed for looking up metadata pointers.)
            Mangled mangler(global_var.m_name);
            mangler.GetDemangledName(lldb::eLanguageTypeUnknown);
            m_symbol_map[global_var.m_name.GetCString()] = global_var.m_remote_addr;
            if (log)
                log->Printf ("  Symbol: %s at 0x%" PRIx64 ".", global_var.m_name.GetCString(), global_var.m_remote_addr);
        }
    }
}