LXR linux/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
  26enum 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
  36struct 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
  47enum 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) */
  58struct jr_prefix {
  59        uint32_t id;
  60        uint32_t total_size;
  61        uint64_t timestamp;
  62};
  63
  64struct 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
  75struct jr_code_close {
  76        struct jr_prefix p;
  77};
  78
  79struct 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
  91struct 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
  98struct 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
 106struct 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
 115union 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
 124static inline struct debug_entry *
 125debug_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
 132static inline char *
 133debug_entry_file(struct debug_entry *ent)
 134{
 135        void *a = ent + 1;
 136        return a;
 137}
 138
 139#endif /* !JITDUMP_H */
 140