lldb/source/Interpreter/OptionGroupWatchpoint.cpp

   1 //===-- OptionGroupWatchpoint.cpp -----------------------------------------===//
   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/Interpreter/OptionGroupWatchpoint.h"
  10
  11 #include "lldb/Host/OptionParser.h"
  12 #include "lldb/Interpreter/OptionArgParser.h"
  13 #include "lldb/Target/Language.h"
  14 #include "lldb/lldb-enumerations.h"
  15
  16 using namespace lldb;
  17 using namespace lldb_private;
  18
  19 static constexpr OptionEnumValueElement g_watch_type[] = {
  20     {
  21         OptionGroupWatchpoint::eWatchRead,
  22         "read",
  23         "Watch for read",
  24     },
  25     {
  26         OptionGroupWatchpoint::eWatchWrite,
  27         "write",
  28         "Watch for write",
  29     },
  30     {
  31         OptionGroupWatchpoint::eWatchModify,
  32         "modify",
  33         "Watch for modifications",
  34     },
  35     {
  36         OptionGroupWatchpoint::eWatchReadWrite,
  37         "read_write",
  38         "Watch for read/write",
  39     },
  40 };
  41
  42 static constexpr OptionEnumValueElement g_watch_size[] = {
  43     {
  44         1,
  45         "1",
  46         "Watch for byte size of 1",
  47     },
  48     {
  49         2,
  50         "2",
  51         "Watch for byte size of 2",
  52     },
  53     {
  54         4,
  55         "4",
  56         "Watch for byte size of 4",
  57     },
  58     {
  59         8,
  60         "8",
  61         "Watch for byte size of 8",
  62     },
  63 };
  64
  65 static constexpr OptionDefinition g_option_table[] = {
  66     {LLDB_OPT_SET_1, false, "watch", 'w', OptionParser::eRequiredArgument,
  67      nullptr, OptionEnumValues(g_watch_type), 0, eArgTypeWatchType,
  68      "Specify the type of watching to perform."},
  69     {LLDB_OPT_SET_1, false, "size", 's', OptionParser::eRequiredArgument,
  70      nullptr, OptionEnumValues(g_watch_size), 0, eArgTypeByteSize,
  71      "Number of bytes to use to watch a region."},
  72     {LLDB_OPT_SET_2,
  73      false,
  74      "language",
  75      'l',
  76      OptionParser::eRequiredArgument,
  77      nullptr,
  78      {},
  79      0,
  80      eArgTypeLanguage,
  81      "Language of expression to run"}};
  82
  83 bool OptionGroupWatchpoint::IsWatchSizeSupported(uint32_t watch_size) {
  84   for (const auto& size : g_watch_size) {
  85     if (0  == size.value)
  86       break;
  87     if (watch_size == size.value)
  88       return true;
  89   }
  90   return false;
  91 }
  92
  93 Status
  94 OptionGroupWatchpoint::SetOptionValue(uint32_t option_idx,
  95                                       llvm::StringRef option_arg,
  96                                       ExecutionContext *execution_context) {
  97   Status error;
  98   const int short_option = g_option_table[option_idx].short_option;
  99   switch (short_option) {
 100   case 'l': {
 101     language_type = Language::GetLanguageTypeFromString(option_arg);
 102     if (language_type == eLanguageTypeUnknown) {
 103       StreamString sstr;
 104       sstr.Printf("Unknown language type: '%s' for expression. List of "
 105                   "supported languages:\n",
 106                   option_arg.str().c_str());
 107       Language::PrintSupportedLanguagesForExpressions(sstr, " ", "\n");
 108       error.SetErrorString(sstr.GetString());
 109     }
 110     break;
 111   }
 112   case 'w': {
 113     WatchType tmp_watch_type;
 114     tmp_watch_type = (WatchType)OptionArgParser::ToOptionEnum(
 115         option_arg, g_option_table[option_idx].enum_values, 0, error);
 116     if (error.Success()) {
 117       watch_type = tmp_watch_type;
 118       watch_type_specified = true;
 119     }
 120     break;
 121   }
 122   case 's':
 123     watch_size = (uint32_t)OptionArgParser::ToOptionEnum(
 124         option_arg, g_option_table[option_idx].enum_values, 0, error);
 125     break;
 126
 127   default:
 128     llvm_unreachable("Unimplemented option");
 129   }
 130
 131   return error;
 132 }
 133
 134 void OptionGroupWatchpoint::OptionParsingStarting(
 135     ExecutionContext *execution_context) {
 136   watch_type_specified = false;
 137   watch_type = eWatchInvalid;
 138   watch_size = 0;
 139   language_type = eLanguageTypeUnknown;
 140 }
 141
 142 llvm::ArrayRef<OptionDefinition> OptionGroupWatchpoint::GetDefinitions() {
 143   return llvm::ArrayRef(g_option_table);
 144 }