contrib/llvm/tools/lldb/source/Plugins/Language/Java/JavaLanguage.cpp

   1 //===-- JavaLanguage.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 // C Includes
  11 #include <string.h>
  12 // C++ Includes
  13 #include <functional>
  14 #include <mutex>
  15
  16 // Other libraries and framework includes
  17 #include "llvm/ADT/StringRef.h"
  18 #include "llvm/Support/Threading.h"
  19
  20 // Project includes
  21 #include "JavaFormatterFunctions.h"
  22 #include "JavaLanguage.h"
  23 #include "lldb/Core/PluginManager.h"
  24 #include "lldb/DataFormatters/DataVisualization.h"
  25 #include "lldb/DataFormatters/FormattersHelpers.h"
  26 #include "lldb/Symbol/JavaASTContext.h"
  27 #include "lldb/Utility/ConstString.h"
  28
  29 using namespace lldb;
  30 using namespace lldb_private;
  31 using namespace lldb_private::formatters;
  32
  33 void JavaLanguage::Initialize() {
  34   PluginManager::RegisterPlugin(GetPluginNameStatic(), "Java Language",
  35                                 CreateInstance);
  36 }
  37
  38 void JavaLanguage::Terminate() {
  39   PluginManager::UnregisterPlugin(CreateInstance);
  40 }
  41
  42 lldb_private::ConstString JavaLanguage::GetPluginNameStatic() {
  43   static ConstString g_name("Java");
  44   return g_name;
  45 }
  46
  47 lldb_private::ConstString JavaLanguage::GetPluginName() {
  48   return GetPluginNameStatic();
  49 }
  50
  51 uint32_t JavaLanguage::GetPluginVersion() { return 1; }
  52
  53 Language *JavaLanguage::CreateInstance(lldb::LanguageType language) {
  54   if (language == eLanguageTypeJava)
  55     return new JavaLanguage();
  56   return nullptr;
  57 }
  58
  59 bool JavaLanguage::IsNilReference(ValueObject &valobj) {
  60   if (!valobj.GetCompilerType().IsReferenceType())
  61     return false;
  62
  63   // If we failed to read the value then it is not a nil reference.
  64   return valobj.GetValueAsUnsigned(UINT64_MAX) == 0;
  65 }
  66
  67 lldb::TypeCategoryImplSP JavaLanguage::GetFormatters() {
  68   static llvm::once_flag g_initialize;
  69   static TypeCategoryImplSP g_category;
  70
  71   llvm::call_once(g_initialize, [this]() -> void {
  72     DataVisualization::Categories::GetCategory(GetPluginName(), g_category);
  73     if (g_category) {
  74       llvm::StringRef array_regexp("^.*\\[\\]&?$");
  75
  76       lldb::TypeSummaryImplSP string_summary_sp(new CXXFunctionSummaryFormat(
  77           TypeSummaryImpl::Flags().SetDontShowChildren(true),
  78           lldb_private::formatters::JavaStringSummaryProvider,
  79           "java.lang.String summary provider"));
  80       g_category->GetTypeSummariesContainer()->Add(
  81           ConstString("java::lang::String"), string_summary_sp);
  82
  83       lldb::TypeSummaryImplSP array_summary_sp(new CXXFunctionSummaryFormat(
  84           TypeSummaryImpl::Flags().SetDontShowChildren(true),
  85           lldb_private::formatters::JavaArraySummaryProvider,
  86           "Java array summary provider"));
  87       g_category->GetRegexTypeSummariesContainer()->Add(
  88           RegularExpressionSP(new RegularExpression(array_regexp)),
  89           array_summary_sp);
  90
  91 #ifndef LLDB_DISABLE_PYTHON
  92       AddCXXSynthetic(
  93           g_category,
  94           lldb_private::formatters::JavaArraySyntheticFrontEndCreator,
  95           "Java array synthetic children", ConstString(array_regexp),
  96           SyntheticChildren::Flags().SetCascades(true), true);
  97 #endif
  98     }
  99   });
 100   return g_category;
 101 }