Bug Summary

File:tools/lldb/source/Commands/CommandObjectSyntax.cpp
Location:line 71, column 18
Description:Called C++ object pointer is null

Annotated Source Code

1//===-- CommandObjectSyntax.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/lldb-python.h"
11
12#include "CommandObjectSyntax.h"
13
14// C Includes
15// C++ Includes
16// Other libraries and framework includes
17// Project includes
18#include "lldb/Interpreter/Args.h"
19#include "lldb/Interpreter/Options.h"
20
21#include "lldb/Interpreter/CommandInterpreter.h"
22#include "lldb/Interpreter/CommandReturnObject.h"
23#include "lldb/Interpreter/CommandObjectMultiword.h"
24
25using namespace lldb;
26using namespace lldb_private;
27
28//-------------------------------------------------------------------------
29// CommandObjectSyntax
30//-------------------------------------------------------------------------
31
32CommandObjectSyntax::CommandObjectSyntax (CommandInterpreter &interpreter) :
33 CommandObjectParsed (interpreter,
34 "syntax",
35 "Shows the correct syntax for a given debugger command.",
36 "syntax <command>")
37{
38 CommandArgumentEntry arg;
39 CommandArgumentData command_arg;
40
41 // Define the first (and only) variant of this arg.
42 command_arg.arg_type = eArgTypeCommandName;
43 command_arg.arg_repetition = eArgRepeatPlain;
44
45 // There is only one variant this argument could be; put it into the argument entry.
46 arg.push_back (command_arg);
47
48 // Push the data for the first argument into the m_arguments vector.
49 m_arguments.push_back (arg);
50}
51
52CommandObjectSyntax::~CommandObjectSyntax()
53{
54}
55
56
57bool
58CommandObjectSyntax::DoExecute (Args& command, CommandReturnObject &result)
59{
60 CommandObject::CommandMap::iterator pos;
61 CommandObject *cmd_obj;
62 const size_t argc = command.GetArgumentCount();
63
64 if (argc > 0)
1
Assuming 'argc' is > 0
→
2
←
Taking true branch
→
65 {
66 cmd_obj = m_interpreter.GetCommandObject (command.GetArgumentAtIndex(0));
67 bool all_okay = true;
68 for (size_t i = 1; i < argc; ++i)
3
←
Assuming 'i' is < 'argc'
→
4
←
Loop condition is true. Entering loop body
→
9
←
Assuming 'i' is < 'argc'
→
10
←
Loop condition is true. Entering loop body
→
69 {
70 std::string sub_command = command.GetArgumentAtIndex (i);
71 if (!cmd_obj->IsMultiwordObject())
5
←
Taking false branch
→
11
←
Called C++ object pointer is null
72 all_okay = false;
73 else
74 {
75 cmd_obj = cmd_obj->GetSubcommandObject(sub_command.c_str());
6
←
Value assigned to 'cmd_obj'
→
76 if (!cmd_obj)
7
←
Assuming 'cmd_obj' is null
→
8
←
Taking true branch
→
77 all_okay = false;
78 }
79 }
80
81 if (all_okay && (cmd_obj != NULL__null))
82 {
83 Stream &output_strm = result.GetOutputStream();
84 if (cmd_obj->GetOptions() != NULL__null)
85 {
86 output_strm.Printf ("\nSyntax: %s\n", cmd_obj->GetSyntax());
87 output_strm.Printf ("(Try 'help %s' for more information on command options syntax.)\n",
88 cmd_obj->GetCommandName());
89 result.SetStatus (eReturnStatusSuccessFinishNoResult);
90 }
91 else
92 {
93 output_strm.Printf ("\nSyntax: %s\n", cmd_obj->GetSyntax());
94 result.SetStatus (eReturnStatusSuccessFinishNoResult);
95 }
96 }
97 else
98 {
99 std::string cmd_string;
100 command.GetCommandString (cmd_string);
101 result.AppendErrorWithFormat ("'%s' is not a known command.\n", cmd_string.c_str());
102 result.AppendError ("Try 'help' to see a current list of commands.");
103 result.SetStatus (eReturnStatusFailed);
104 }
105 }
106 else
107 {
108 result.AppendError ("Must call 'syntax' with a valid command.");
109 result.SetStatus (eReturnStatusFailed);
110 }
111
112 return result.Succeeded();
113}