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 }
94