1 //===-- ThreadElfCore.h ----------------------------------------*- 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 #ifndef liblldb_ThreadElfCore_h_
11 #define liblldb_ThreadElfCore_h_
12 
13 #include <string>
14 
15 #include "lldb/Target/Thread.h"
16 #include "lldb/Core/DataExtractor.h"
17 
18 struct compat_timeval
19 {
20     int64_t tv_sec;
21     int32_t tv_usec;
22 };
23 
24 // PRSTATUS structure's size differs based on architecture.
25 // Currently parsing done only for x86-64 architecture by
26 // simply reading data from the buffer.
27 // The following macros are used to specify the size.
28 // Calculating size using sizeof() wont work because of padding.
29 #define ELFLINUXPRSTATUS64_SIZE (112)
30 #define ELFLINUXPRPSINFO64_SIZE (132)
31 
32 struct ELFLinuxPrStatus
33 {
34     int32_t         si_signo;
35     int32_t         si_code;
36     int32_t         si_errno;
37 
38     int16_t         pr_cursig;
39 
40     uint64_t        pr_sigpend;
41     uint64_t        pr_sighold;
42 
43     uint32_t        pr_pid;
44     uint32_t        pr_ppid;
45     uint32_t        pr_pgrp;
46     uint32_t        pr_sid;
47 
48     compat_timeval  pr_utime;
49     compat_timeval  pr_stime;
50     compat_timeval  pr_cutime;
51     compat_timeval  pr_cstime;
52 
53     ELFLinuxPrStatus();
54 
55     bool
56     Parse(lldb_private::DataExtractor &data, lldb_private::ArchSpec &arch);
57 
58     static size_t
GetSizeELFLinuxPrStatus59     GetSize(lldb_private::ArchSpec &arch)
60     {
61         switch(arch.GetCore())
62         {
63             case lldb_private::ArchSpec::eCore_x86_64_x86_64:
64                 return ELFLINUXPRSTATUS64_SIZE;
65             default:
66                 return 0;
67         }
68     }
69 };
70 
71 struct ELFLinuxPrPsInfo
72 {
73     char        pr_state;
74     char        pr_sname;
75     char        pr_zomb;
76     char        pr_nice;
77     uint64_t    pr_flag;
78     uint32_t    pr_uid;
79     uint32_t    pr_gid;
80     int32_t     pr_pid;
81     int32_t     pr_ppid;
82     int32_t     pr_pgrp;
83     int32_t     pr_sid;
84     char        pr_fname[16];
85     char        pr_psargs[80];
86 
87     ELFLinuxPrPsInfo();
88 
89     bool
90     Parse(lldb_private::DataExtractor &data, lldb_private::ArchSpec &arch);
91 
92     static size_t
GetSizeELFLinuxPrPsInfo93     GetSize(lldb_private::ArchSpec &arch)
94     {
95         switch(arch.GetCore())
96         {
97             case lldb_private::ArchSpec::eCore_x86_64_x86_64:
98                 return ELFLINUXPRPSINFO64_SIZE;
99             default:
100                 return 0;
101         }
102     }
103 
104 };
105 
106 struct ThreadData
107 {
108     lldb_private::DataExtractor gpregset;
109     lldb_private::DataExtractor fpregset;
110     int signo;
111     std::string name;
112 };
113 
114 class ThreadElfCore : public lldb_private::Thread
115 {
116 public:
117     ThreadElfCore (lldb_private::Process &process, lldb::tid_t tid,
118                    const ThreadData &td);
119 
120     virtual
121     ~ThreadElfCore ();
122 
123     virtual void
124     RefreshStateAfterStop();
125 
126     virtual lldb::RegisterContextSP
127     GetRegisterContext ();
128 
129     virtual lldb::RegisterContextSP
130     CreateRegisterContextForFrame (lldb_private::StackFrame *frame);
131 
132     virtual void
133     ClearStackFrames ();
134 
135     static bool
ThreadIDIsValid(lldb::tid_t thread)136     ThreadIDIsValid (lldb::tid_t thread)
137     {
138         return thread != 0;
139     }
140 
141     virtual const char *
GetName()142     GetName ()
143     {
144         if (m_thread_name.empty())
145             return NULL;
146         return m_thread_name.c_str();
147     }
148 
149     void
SetName(const char * name)150     SetName (const char *name)
151     {
152         if (name && name[0])
153             m_thread_name.assign (name);
154         else
155             m_thread_name.clear();
156     }
157 
158 protected:
159     //------------------------------------------------------------------
160     // Member variables.
161     //------------------------------------------------------------------
162     std::string m_thread_name;
163     lldb::RegisterContextSP m_thread_reg_ctx_sp;
164 
165     int m_signo;
166 
167     lldb_private::DataExtractor m_gpregset_data;
168     lldb_private::DataExtractor m_fpregset_data;
169 
170     virtual bool CalculateStopInfo();
171 
172 };
173 
174 #endif  // liblldb_ThreadElfCore_h_
175