source/Expression/ExpressionVariable.cpp

   1 //===-- ExpressionVariable.cpp ----------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "lldb/Expression/ExpressionVariable.h"
  11 #include "lldb/Expression/IRExecutionUnit.h"
  12 #include "lldb/Target/Target.h"
  13 #include "lldb/Utility/Log.h"
  14
  15 using namespace lldb_private;
  16
  17 ExpressionVariable::~ExpressionVariable() {}
  18
  19 uint8_t *ExpressionVariable::GetValueBytes() {
  20   const size_t byte_size = m_frozen_sp->GetByteSize();
  21   if (byte_size > 0) {
  22     if (m_frozen_sp->GetDataExtractor().GetByteSize() < byte_size) {
  23       m_frozen_sp->GetValue().ResizeData(byte_size);
  24       m_frozen_sp->GetValue().GetData(m_frozen_sp->GetDataExtractor());
  25     }
  26     return const_cast<uint8_t *>(
  27         m_frozen_sp->GetDataExtractor().GetDataStart());
  28   }
  29   return NULL;
  30 }
  31
  32 PersistentExpressionState::~PersistentExpressionState() {}
  33
  34 lldb::addr_t PersistentExpressionState::LookupSymbol(const ConstString &name) {
  35   SymbolMap::iterator si = m_symbol_map.find(name.GetCString());
  36
  37   if (si != m_symbol_map.end())
  38     return si->second;
  39   else
  40     return LLDB_INVALID_ADDRESS;
  41 }
  42
  43 void PersistentExpressionState::RegisterExecutionUnit(
  44     lldb::IRExecutionUnitSP &execution_unit_sp) {
  45   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
  46
  47   m_execution_units.insert(execution_unit_sp);
  48
  49   if (log)
  50     log->Printf("Registering JITted Functions:\n");
  51
  52   for (const IRExecutionUnit::JittedFunction &jitted_function :
  53        execution_unit_sp->GetJittedFunctions()) {
  54     if (jitted_function.m_external &&
  55         jitted_function.m_name != execution_unit_sp->GetFunctionName() &&
  56         jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS) {
  57       m_symbol_map[jitted_function.m_name.GetCString()] =
  58           jitted_function.m_remote_addr;
  59       if (log)
  60         log->Printf("  Function: %s at 0x%" PRIx64 ".",
  61                     jitted_function.m_name.GetCString(),
  62                     jitted_function.m_remote_addr);
  63     }
  64   }
  65
  66   if (log)
  67     log->Printf("Registering JIIted Symbols:\n");
  68
  69   for (const IRExecutionUnit::JittedGlobalVariable &global_var :
  70        execution_unit_sp->GetJittedGlobalVariables()) {
  71     if (global_var.m_remote_addr != LLDB_INVALID_ADDRESS) {
  72       // Demangle the name before inserting it, so that lookups by the ConstStr
  73       // of the demangled name will find the mangled one (needed for looking up
  74       // metadata pointers.)
  75       Mangled mangler(global_var.m_name);
  76       mangler.GetDemangledName(lldb::eLanguageTypeUnknown);
  77       m_symbol_map[global_var.m_name.GetCString()] = global_var.m_remote_addr;
  78       if (log)
  79         log->Printf("  Symbol: %s at 0x%" PRIx64 ".",
  80                     global_var.m_name.GetCString(), global_var.m_remote_addr);
  81     }
  82   }
  83 }
  84
  85 ConstString PersistentExpressionState::GetNextPersistentVariableName(
  86     Target &target, llvm::StringRef Prefix) {
  87   llvm::SmallString<64> name;
  88   {
  89     llvm::raw_svector_ostream os(name);
  90     os << Prefix << target.GetNextPersistentVariableIndex();
  91   }
  92   return ConstString(name);
  93 }