tools/perf/util/jitdump.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * jitdump.h: jitted code info encapsulation file format
   4  *
   5  * Adapted from OProfile GPLv2 support jidump.h:
   6  * Copyright 2007 OProfile authors
   7  * Jens Wilke
   8  * Daniel Hansel
   9  * Copyright IBM Corporation 2007
  10  */
  11 #ifndef JITDUMP_H
  12 #define JITDUMP_H
  13
  14 #include <sys/time.h>
  15 #include <time.h>
  16 #include <stdint.h>
  17
  18 /* JiTD */
  19 #define JITHEADER_MAGIC         0x4A695444
  20 #define JITHEADER_MAGIC_SW      0x4454694A
  21
  22 #define PADDING_8ALIGNED(x) ((((x) + 7) & 7) ^ 7)
  23 #define ALIGN_8(x) (((x) + 7) & (~7))
  24
  25 #define JITHEADER_VERSION 1
  26
  27 enum jitdump_flags_bits {
  28         JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT,
  29         JITDUMP_FLAGS_MAX_BIT,
  30 };
  31
  32 #define JITDUMP_FLAGS_ARCH_TIMESTAMP    (1ULL << JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT)
  33
  34 #define JITDUMP_FLAGS_RESERVED (JITDUMP_FLAGS_MAX_BIT < 64 ? \
  35                                 (~((1ULL << JITDUMP_FLAGS_MAX_BIT) - 1)) : 0)
  36
  37 struct jitheader {
  38         uint32_t magic;         /* characters "jItD" */
  39         uint32_t version;       /* header version */
  40         uint32_t total_size;    /* total size of header */
  41         uint32_t elf_mach;      /* elf mach target */
  42         uint32_t pad1;          /* reserved */
  43         uint32_t pid;           /* JIT process id */
  44         uint64_t timestamp;     /* timestamp */
  45         uint64_t flags;         /* flags */
  46 };
  47
  48 enum jit_record_type {
  49         JIT_CODE_LOAD           = 0,
  50         JIT_CODE_MOVE           = 1,
  51         JIT_CODE_DEBUG_INFO     = 2,
  52         JIT_CODE_CLOSE          = 3,
  53         JIT_CODE_UNWINDING_INFO = 4,
  54
  55         JIT_CODE_MAX,
  56 };
  57
  58 /* record prefix (mandatory in each record) */
  59 struct jr_prefix {
  60         uint32_t id;
  61         uint32_t total_size;
  62         uint64_t timestamp;
  63 };
  64
  65 struct jr_code_load {
  66         struct jr_prefix p;
  67
  68         uint32_t pid;
  69         uint32_t tid;
  70         uint64_t vma;
  71         uint64_t code_addr;
  72         uint64_t code_size;
  73         uint64_t code_index;
  74 };
  75
  76 struct jr_code_close {
  77         struct jr_prefix p;
  78 };
  79
  80 struct jr_code_move {
  81         struct jr_prefix p;
  82
  83         uint32_t pid;
  84         uint32_t tid;
  85         uint64_t vma;
  86         uint64_t old_code_addr;
  87         uint64_t new_code_addr;
  88         uint64_t code_size;
  89         uint64_t code_index;
  90 };
  91
  92 struct debug_entry {
  93         uint64_t addr;
  94         int lineno;         /* source line number starting at 1 */
  95         int discrim;        /* column discriminator, 0 is default */
  96         const char name[0]; /* null terminated filename, \xff\0 if same as previous entry */
  97 };
  98
  99 struct jr_code_debug_info {
 100         struct jr_prefix p;
 101
 102         uint64_t code_addr;
 103         uint64_t nr_entry;
 104         struct debug_entry entries[0];
 105 };
 106
 107 struct jr_code_unwinding_info {
 108         struct jr_prefix p;
 109
 110         uint64_t unwinding_size;
 111         uint64_t eh_frame_hdr_size;
 112         uint64_t mapped_size;
 113         const char unwinding_data[0];
 114 };
 115
 116 union jr_entry {
 117         struct jr_code_debug_info info;
 118         struct jr_code_close close;
 119         struct jr_code_load load;
 120         struct jr_code_move move;
 121         struct jr_prefix prefix;
 122         struct jr_code_unwinding_info unwinding;
 123 };
 124
 125 static inline struct debug_entry *
 126 debug_entry_next(struct debug_entry *ent)
 127 {
 128         void *a = ent + 1;
 129         size_t l = strlen(ent->name) + 1;
 130         return a + l;
 131 }
 132
 133 static inline char *
 134 debug_entry_file(struct debug_entry *ent)
 135 {
 136         void *a = ent + 1;
 137         return a;
 138 }
 139
 140 #endif /* !JITDUMP_H */