ExpressionVariable.cpp revision 360784 
1//===-- ExpressionVariable.cpp ----------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Expression/ExpressionVariable.h"
10#include "lldb/Expression/IRExecutionUnit.h"
11#include "lldb/Target/Target.h"
12#include "lldb/Utility/Log.h"
13
14using namespace lldb_private;
15
16ExpressionVariable::~ExpressionVariable() {}
17
18uint8_t *ExpressionVariable::GetValueBytes() {
19  const size_t byte_size = m_frozen_sp->GetByteSize();
20  if (byte_size > 0) {
21    if (m_frozen_sp->GetDataExtractor().GetByteSize() < byte_size) {
22      m_frozen_sp->GetValue().ResizeData(byte_size);
23      m_frozen_sp->GetValue().GetData(m_frozen_sp->GetDataExtractor());
24    }
25    return const_cast<uint8_t *>(
26        m_frozen_sp->GetDataExtractor().GetDataStart());
27  }
28  return nullptr;
29}
30
31PersistentExpressionState::~PersistentExpressionState() {}
32
33lldb::addr_t PersistentExpressionState::LookupSymbol(ConstString name) {
34  SymbolMap::iterator si = m_symbol_map.find(name.GetCString());
35
36  if (si != m_symbol_map.end())
37    return si->second;
38  else
39    return LLDB_INVALID_ADDRESS;
40}
41
42void PersistentExpressionState::RegisterExecutionUnit(
43    lldb::IRExecutionUnitSP &execution_unit_sp) {
44  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
45
46  m_execution_units.insert(execution_unit_sp);
47
48  LLDB_LOGF(log, "Registering JITted Functions:\n");
49
50  for (const IRExecutionUnit::JittedFunction &jitted_function :
51       execution_unit_sp->GetJittedFunctions()) {
52    if (jitted_function.m_external &&
53        jitted_function.m_name != execution_unit_sp->GetFunctionName() &&
54        jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS) {
55      m_symbol_map[jitted_function.m_name.GetCString()] =
56          jitted_function.m_remote_addr;
57      LLDB_LOGF(log, "  Function: %s at 0x%" PRIx64 ".",
58                jitted_function.m_name.GetCString(),
59                jitted_function.m_remote_addr);
60    }
61  }
62
63  LLDB_LOGF(log, "Registering JIIted Symbols:\n");
64
65  for (const IRExecutionUnit::JittedGlobalVariable &global_var :
66       execution_unit_sp->GetJittedGlobalVariables()) {
67    if (global_var.m_remote_addr != LLDB_INVALID_ADDRESS) {
68      // Demangle the name before inserting it, so that lookups by the ConstStr
69      // of the demangled name will find the mangled one (needed for looking up
70      // metadata pointers.)
71      Mangled mangler(global_var.m_name);
72      mangler.GetDemangledName(lldb::eLanguageTypeUnknown);
73      m_symbol_map[global_var.m_name.GetCString()] = global_var.m_remote_addr;
74      LLDB_LOGF(log, "  Symbol: %s at 0x%" PRIx64 ".",
75                global_var.m_name.GetCString(), global_var.m_remote_addr);
76    }
77  }
78}
79
80ConstString PersistentExpressionState::GetNextPersistentVariableName(
81    Target &target, llvm::StringRef Prefix) {
82  llvm::SmallString<64> name;
83  {
84    llvm::raw_svector_ostream os(name);
85    os << Prefix << target.GetNextPersistentVariableIndex();
86  }
87  return ConstString(name);
88}
89