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Linux/tools/perf/util/jitdump.h

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  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 */
141 

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