tools/perf/util/jitdump.h

   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 */