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 
14 using namespace lldb_private;
15 
16 ExpressionVariable::~ExpressionVariable() {}
17 
18 uint8_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 
31 PersistentExpressionState::~PersistentExpressionState() {}
32 
33 lldb::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 
42 void 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 
80 ConstString 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