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1 /*
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef _LIBPROC_IMPL_H_
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26 #define _LIBPROC_IMPL_H_
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27
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28 #include <unistd.h>
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29 #include <limits.h>
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30 #include "libproc.h"
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31 #include "symtab.h"
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32
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33 #ifdef __APPLE__
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34 #include <inttypes.h> // for PRIx64, 32, ...
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35 #include <pthread.h>
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36 #include <mach-o/loader.h>
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37 #include <mach-o/nlist.h>
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38 #include <mach-o/fat.h>
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39
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40 #ifndef register_t
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41 #define register_t uint64_t
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42 #endif
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43
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44 /*** registers copied from bsd/amd64 */
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45 typedef struct reg {
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46 register_t r_r15;
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47 register_t r_r14;
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48 register_t r_r13;
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49 register_t r_r12;
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50 register_t r_r11;
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51 register_t r_r10;
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52 register_t r_r9;
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53 register_t r_r8;
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54 register_t r_rdi;
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55 register_t r_rsi;
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56 register_t r_rbp;
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57 register_t r_rbx;
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58 register_t r_rdx;
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59 register_t r_rcx;
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60 register_t r_rax;
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61 uint32_t r_trapno; // not used
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62 uint16_t r_fs;
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63 uint16_t r_gs;
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64 uint32_t r_err; // not used
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65 uint16_t r_es; // not used
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66 uint16_t r_ds; // not used
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67 register_t r_rip;
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68 register_t r_cs;
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69 register_t r_rflags;
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70 register_t r_rsp;
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71 register_t r_ss; // not used
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72 } reg;
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73
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74 // convenient defs
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75 typedef struct mach_header_64 mach_header_64;
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76 typedef struct load_command load_command;
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77 typedef struct segment_command_64 segment_command_64;
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78 typedef struct thread_command thread_command;
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79 typedef struct dylib_command dylib_command;
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80 typedef struct symtab_command symtab_command;
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81 typedef struct nlist_64 nlist_64;
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82 #else
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83 #include <thread_db.h>
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84 #include "salibelf.h"
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85 #endif // __APPLE__
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86
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87 // data structures in this file mimic those of Solaris 8.0 - libproc's Pcontrol.h
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88
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89 #define BUF_SIZE (PATH_MAX + NAME_MAX + 1)
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90
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91 // list of shared objects
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92 typedef struct lib_info {
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93 char name[BUF_SIZE];
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94 uintptr_t base;
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95 struct symtab* symtab;
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96 int fd; // file descriptor for lib
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97 struct lib_info* next;
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98 } lib_info;
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99
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100 // list of threads
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101 typedef struct sa_thread_info {
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102 lwpid_t lwp_id; // same as pthread_t
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103 pthread_t pthread_id; //
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104 struct reg regs; // not for process, core uses for caching regset
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105 struct sa_thread_info* next;
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106 } sa_thread_info;
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107
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108 // list of virtual memory maps
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109 typedef struct map_info {
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110 int fd; // file descriptor
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111 off_t offset; // file offset of this mapping
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112 uintptr_t vaddr; // starting virtual address
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113 size_t memsz; // size of the mapping
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114 struct map_info* next;
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115 } map_info;
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116
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117 // vtable for ps_prochandle
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118 typedef struct ps_prochandle_ops {
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119 // "derived class" clean-up
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120 void (*release)(struct ps_prochandle* ph);
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121 // read from debuggee
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122 bool (*p_pread)(struct ps_prochandle *ph,
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123 uintptr_t addr, char *buf, size_t size);
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124 // write into debuggee
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125 bool (*p_pwrite)(struct ps_prochandle *ph,
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126 uintptr_t addr, const char *buf , size_t size);
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127 // get integer regset of a thread
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128 bool (*get_lwp_regs)(struct ps_prochandle* ph, lwpid_t lwp_id, struct reg* regs);
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129 // get info on thread
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130 bool (*get_lwp_info)(struct ps_prochandle *ph, lwpid_t lwp_id, void *linfo);
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131 } ps_prochandle_ops;
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132
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133 // the ps_prochandle
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134
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135 struct core_data {
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136 int core_fd; // file descriptor of core file
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137 int exec_fd; // file descriptor of exec file
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138 int interp_fd; // file descriptor of interpreter (ld-elf.so.1)
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139 // part of the class sharing workaround
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140 int classes_jsa_fd; // file descriptor of class share archive
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141 uintptr_t dynamic_addr; // address of dynamic section of a.out
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142 uintptr_t ld_base_addr; // base address of ld.so
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143 size_t num_maps; // number of maps.
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144 map_info* maps; // maps in a linked list
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145 // part of the class sharing workaround
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146 map_info* class_share_maps;// class share maps in a linked list
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147 map_info** map_array; // sorted (by vaddr) array of map_info pointers
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148 char exec_path[4096]; // file name java
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149 };
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150
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151 struct ps_prochandle {
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152 ps_prochandle_ops* ops; // vtable ptr
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153 pid_t pid;
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154 int num_libs;
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155 lib_info* libs; // head of lib list
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156 lib_info* lib_tail; // tail of lib list - to append at the end
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157 int num_threads;
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158 sa_thread_info* threads; // head of thread list
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159 struct core_data* core; // data only used for core dumps, NULL for process
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160 };
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161
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162 int pathmap_open(const char* name);
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163 void print_debug(const char* format,...);
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164 void print_error(const char* format,...);
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165 bool is_debug();
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166
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167 typedef bool (*thread_info_callback)(struct ps_prochandle* ph, pthread_t pid, lwpid_t lwpid);
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168
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169 // reads thread info using libthread_db and calls above callback for each thread
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170 bool read_thread_info(struct ps_prochandle* ph, thread_info_callback cb);
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171
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172 // adds a new shared object to lib list, returns NULL on failure
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173 lib_info* add_lib_info(struct ps_prochandle* ph, const char* libname, uintptr_t base);
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174
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175 // adds a new shared object to lib list, supply open lib file descriptor as well
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176 lib_info* add_lib_info_fd(struct ps_prochandle* ph, const char* libname, int fd,
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177 uintptr_t base);
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178
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179 sa_thread_info* add_thread_info(struct ps_prochandle* ph, pthread_t pthread_id, lwpid_t lwp_id);
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180 // a test for ELF signature without using libelf
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181
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182 #ifdef __APPLE__
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183 // a test for Mach-O signature
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184 bool is_macho_file(int fd);
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185 // skip fat head to get image start offset of cpu_type_t
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186 // return false if any error happens, else value in offset.
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187 bool get_arch_off(int fd, cpu_type_t cputype, off_t *offset);
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188 #else
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189 bool is_elf_file(int fd);
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190 #endif // __APPLE__
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191
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192 lwpid_t get_lwp_id(struct ps_prochandle* ph, int index);
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193 bool set_lwp_id(struct ps_prochandle* ph, int index, lwpid_t lwpid);
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194 bool get_nth_lwp_regs(struct ps_prochandle* ph, int index, struct reg* regs);
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195
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196 // ps_pglobal_lookup() looks up the symbol sym_name in the symbol table
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197 // of the load object object_name in the target process identified by ph.
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198 // It returns the symbol's value as an address in the target process in
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199 // *sym_addr.
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200
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201 ps_err_e ps_pglobal_lookup(struct ps_prochandle *ph, const char *object_name,
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202 const char *sym_name, psaddr_t *sym_addr);
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203
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204 // read "size" bytes info "buf" from address "addr"
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205 ps_err_e ps_pread(struct ps_prochandle *ph, psaddr_t addr,
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206 void *buf, size_t size);
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207
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208 // write "size" bytes of data to debuggee at address "addr"
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209 ps_err_e ps_pwrite(struct ps_prochandle *ph, psaddr_t addr,
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210 const void *buf, size_t size);
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211
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212 // fill in ptrace_lwpinfo for lid
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213 ps_err_e ps_linfo(struct ps_prochandle *ph, lwpid_t lwp_id, void *linfo);
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214
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215 // needed for when libthread_db is compiled with TD_DEBUG defined
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216 void ps_plog (const char *format, ...);
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217
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218 // untility, tells the position in file
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219 off_t ltell(int fd);
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220 #endif //_LIBPROC_IMPL_H_
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