1 /* 2 * jitdump.h: jitted code info encapsulation file format 3 * 4 * Adapted from OProfile GPLv2 support jidump.h: 5 * Copyright 2007 OProfile authors 6 * Jens Wilke 7 * Daniel Hansel 8 * Copyright IBM Corporation 2007 9 */ 10 #ifndef JITDUMP_H 11 #define JITDUMP_H 12 13 #include <sys/time.h> 14 #include <time.h> 15 #include <stdint.h> 16 17 /* JiTD */ 18 #define JITHEADER_MAGIC 0x4A695444 19 #define JITHEADER_MAGIC_SW 0x4454694A 20 21 #define PADDING_8ALIGNED(x) ((((x) + 7) & 7) ^ 7) 22 #define ALIGN_8(x) (((x) + 7) & (~7)) 23 24 #define JITHEADER_VERSION 1 25 26 enum jitdump_flags_bits { 27 JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT, 28 JITDUMP_FLAGS_MAX_BIT, 29 }; 30 31 #define JITDUMP_FLAGS_ARCH_TIMESTAMP (1ULL << JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT) 32 33 #define JITDUMP_FLAGS_RESERVED (JITDUMP_FLAGS_MAX_BIT < 64 ? \ 34 (~((1ULL << JITDUMP_FLAGS_MAX_BIT) - 1)) : 0) 35 36 struct jitheader { 37 uint32_t magic; /* characters "jItD" */ 38 uint32_t version; /* header version */ 39 uint32_t total_size; /* total size of header */ 40 uint32_t elf_mach; /* elf mach target */ 41 uint32_t pad1; /* reserved */ 42 uint32_t pid; /* JIT process id */ 43 uint64_t timestamp; /* timestamp */ 44 uint64_t flags; /* flags */ 45 }; 46 47 enum jit_record_type { 48 JIT_CODE_LOAD = 0, 49 JIT_CODE_MOVE = 1, 50 JIT_CODE_DEBUG_INFO = 2, 51 JIT_CODE_CLOSE = 3, 52 JIT_CODE_UNWINDING_INFO = 4, 53 54 JIT_CODE_MAX, 55 }; 56 57 /* record prefix (mandatory in each record) */ 58 struct jr_prefix { 59 uint32_t id; 60 uint32_t total_size; 61 uint64_t timestamp; 62 }; 63 64 struct jr_code_load { 65 struct jr_prefix p; 66 67 uint32_t pid; 68 uint32_t tid; 69 uint64_t vma; 70 uint64_t code_addr; 71 uint64_t code_size; 72 uint64_t code_index; 73 }; 74 75 struct jr_code_close { 76 struct jr_prefix p; 77 }; 78 79 struct jr_code_move { 80 struct jr_prefix p; 81 82 uint32_t pid; 83 uint32_t tid; 84 uint64_t vma; 85 uint64_t old_code_addr; 86 uint64_t new_code_addr; 87 uint64_t code_size; 88 uint64_t code_index; 89 }; 90 91 struct debug_entry { 92 uint64_t addr; 93 int lineno; /* source line number starting at 1 */ 94 int discrim; /* column discriminator, 0 is default */ 95 const char name[0]; /* null terminated filename, \xff\0 if same as previous entry */ 96 }; 97 98 struct jr_code_debug_info { 99 struct jr_prefix p; 100 101 uint64_t code_addr; 102 uint64_t nr_entry; 103 struct debug_entry entries[0]; 104 }; 105 106 struct jr_code_unwinding_info { 107 struct jr_prefix p; 108 109 uint64_t unwinding_size; 110 uint64_t eh_frame_hdr_size; 111 uint64_t mapped_size; 112 const char unwinding_data[0]; 113 }; 114 115 union jr_entry { 116 struct jr_code_debug_info info; 117 struct jr_code_close close; 118 struct jr_code_load load; 119 struct jr_code_move move; 120 struct jr_prefix prefix; 121 struct jr_code_unwinding_info unwinding; 122 }; 123 124 static inline struct debug_entry * 125 debug_entry_next(struct debug_entry *ent) 126 { 127 void *a = ent + 1; 128 size_t l = strlen(ent->name) + 1; 129 return a + l; 130 } 131 132 static inline char * 133 debug_entry_file(struct debug_entry *ent) 134 { 135 void *a = ent + 1; 136 return a; 137 } 138 139 #endif /* !JITDUMP_H */ 140