gdb/tracefile.h

   1 #ifndef TRACEFILE_H
   2 #define TRACEFILE_H 1
   3
   4 #include "tracepoint.h"
   5 #include "target.h"
   6 #include "process-stratum-target.h"
   7
   8 struct trace_file_writer;
   9
  10 /* Operations to write trace frames to a specific trace format.  */
  11
  12 struct trace_frame_write_ops
  13 {
  14   /* Write a new trace frame.  The tracepoint number of this trace
  15      frame is TPNUM.  */
  16   void (*start) (struct trace_file_writer *self, uint16_t tpnum);
  17
  18   /* Write an 'R' block.  Buffer BUF contains its contents and SIZE is
  19      its size.  */
  20   void (*write_r_block) (struct trace_file_writer *self,
  21                          gdb_byte *buf, int32_t size);
  22
  23   /* Write an 'M' block, the header and memory contents respectively.
  24      The header of 'M' block is composed of the start address and the
  25      length of memory collection, and the memory contents contain
  26      the collected memory contents in tracing.
  27      For extremely large M block, GDB is unable to get its contents
  28      and write them into trace file in one go, due to the limitation
  29      of the remote target or the size of internal buffer, we split
  30      the operation to 'M' block to two operations.  */
  31   /* Write the head of 'M' block.  ADDR is the start address of
  32      collected memory and LENGTH is the length of memory contents.  */
  33   void (*write_m_block_header) (struct trace_file_writer *self,
  34                                 uint64_t addr, uint16_t length);
  35   /* Write the memory contents of 'M' block.  Buffer BUF contains
  36      its contents and LENGTH is its length.  This method can be called
  37      multiple times to write large memory contents of a single 'M'
  38      block.  */
  39   void (*write_m_block_memory) (struct trace_file_writer *self,
  40                                 gdb_byte *buf, uint16_t length);
  41
  42   /* Write a 'V' block.  NUM is the trace variable number and VAL is
  43      the value of the trace variable.  */
  44   void (*write_v_block) (struct trace_file_writer *self, int32_t num,
  45                          uint64_t val);
  46
  47   /* The end of the trace frame.  */
  48   void (*end) (struct trace_file_writer *self);
  49 };
  50
  51 /* Operations to write trace buffers to a specific trace format.  */
  52
  53 struct trace_file_write_ops
  54 {
  55   /* Destructor.  Releases everything from SELF (but not SELF
  56      itself).  */
  57   void (*dtor) (struct trace_file_writer *self);
  58
  59   /*  Save the data to file or directory NAME of desired format in
  60       target side.  Return true for success, otherwise return
  61       false.  */
  62   int (*target_save) (struct trace_file_writer *self,
  63                       const char *name);
  64
  65   /* Write the trace buffers to file or directory NAME.  */
  66   void (*start) (struct trace_file_writer *self,
  67                  const char *name);
  68
  69   /* Write the trace header.  */
  70   void (*write_header) (struct trace_file_writer *self);
  71
  72   /* Write the type of block about registers.  SIZE is the size of
  73      all registers on the target.  */
  74   void (*write_regblock_type) (struct trace_file_writer *self,
  75                                int size);
  76
  77   /* Write trace status TS.  */
  78   void (*write_status) (struct trace_file_writer *self,
  79                         struct trace_status *ts);
  80
  81   /* Write the uploaded TSV.  */
  82   void (*write_uploaded_tsv) (struct trace_file_writer *self,
  83                               struct uploaded_tsv *tsv);
  84
  85   /* Write the uploaded tracepoint TP.  */
  86   void (*write_uploaded_tp) (struct trace_file_writer *self,
  87                              struct uploaded_tp *tp);
  88
  89   /* Write target description.  */
  90   void (*write_tdesc) (struct trace_file_writer *self);
  91
  92   /* Write to mark the end of the definition part.  */
  93   void (*write_definition_end) (struct trace_file_writer *self);
  94
  95   /* Write the data of trace buffer without parsing.  The content is
  96      in BUF and length is LEN.  */
  97   void (*write_trace_buffer) (struct trace_file_writer *self,
  98                               gdb_byte *buf, LONGEST len);
  99
 100   /* Operations to write trace frames.  The user of this field is
 101      responsible to parse the data of trace buffer.  Either field
 102      'write_trace_buffer' or field ' frame_ops' is NULL.  */
 103   const struct trace_frame_write_ops *frame_ops;
 104
 105   /* The end of writing trace buffers.  */
 106   void (*end) (struct trace_file_writer *self);
 107 };
 108
 109 /* Trace file writer for a given format.  */
 110
 111 struct trace_file_writer
 112 {
 113   const struct trace_file_write_ops *ops;
 114 };
 115
 116 extern struct trace_file_writer *tfile_trace_file_writer_new (void);
 117
 118 /* Base class for tracefile related targets.  */
 119
 120 class tracefile_target : public process_stratum_target
 121 {
 122 public:
 123   tracefile_target () = default;
 124
 125   int get_trace_status (trace_status *ts) override;
 126   bool has_all_memory () override;
 127   bool has_memory () override;
 128   bool has_stack () override;
 129   bool has_registers () override;
 130   bool has_execution (inferior *inf) override { return false; }
 131   bool thread_alive (ptid_t ptid) override;
 132 };
 133
 134 extern void tracefile_fetch_registers (struct regcache *regcache, int regno);
 135
 136 #endif /* TRACEFILE_H */