Subversion Repositories openrisc_2011-10-31

/* This program does two things; it generates valid trace files, and

   it can also be traced so as to test trace file creation from

   GDB.  */

#include <stdio.h>

#include <string.h>

#include <fcntl.h>

#include <sys/stat.h>

char spbuf[200];

char trbuf[1000];

char *trptr;

char *tfsizeptr;

int testglob = 31415;

int testglob2 = 271828;

const int constglob = 10000;

int

start_trace_file (char *filename)

{

  int fd;

  fd = open (filename, O_WRONLY|O_CREAT|O_APPEND,

             S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);

  if (fd < 0)

    return fd;

  /* Write a file header, with a high-bit-set char to indicate a

     binary file, plus a hint as what this file is, and a version

     number in case of future needs.  */

  write (fd, "\x7fTRACE0\n", 8);

  return fd;

}

void

finish_trace_file (int fd)

{

  close (fd);

}

void

add_memory_block (char *addr, int size)

{

  short short_x;

  long long ll_x;

  *((char *) trptr) = 'M';

  trptr += 1;

  ll_x = (long) addr;

  memcpy (trptr, &ll_x, sizeof (long long));

  trptr += sizeof (long long);

  short_x = size;

  memcpy (trptr, &short_x, 2);

  trptr += 2;

  memcpy (trptr, addr, size);

  trptr += size;

}

void

write_basic_trace_file (void)

{

  int fd, int_x;

  short short_x;

  fd = start_trace_file ("basic.tf");

  /* The next part of the file consists of newline-separated lines

     defining status, tracepoints, etc.  The section is terminated by

     an empty line.  */

  /* Dump the size of the R (register) blocks in traceframes.  */

  snprintf (spbuf, sizeof spbuf, "R %x\n", 500 /* FIXME get from arch */);

  write (fd, spbuf, strlen (spbuf));

  /* Dump trace status, in the general form of the qTstatus reply.  */

  snprintf (spbuf, sizeof spbuf, "status 0;tstop:0;tframes:1;tcreated:1;tfree:100;tsize:1000\n");

  write (fd, spbuf, strlen (spbuf));

  /* Dump tracepoint definitions, in syntax similar to that used

     for reconnection uploads.  */

  /* FIXME need a portable way to print function address in hex */

  snprintf (spbuf, sizeof spbuf, "tp T1:%lx:E:0:0\n",

            (long) &write_basic_trace_file);

  write (fd, spbuf, strlen (spbuf));

  /* (Note that we would only need actions defined if we wanted to

     test tdump.) */

  /* Empty line marks the end of the definition section.  */

  write (fd, "\n", 1);

  /* Make up a simulated trace buffer.  */

  /* (Encapsulate better if we're going to do lots of this; note that

     buffer endianness is the target program's enddianness.) */

  trptr = trbuf;

  short_x = 1;

  memcpy (trptr, &short_x, 2);

  trptr += 2;

  tfsizeptr = trptr;

  trptr += 4;

  add_memory_block (&testglob, sizeof (testglob));

  /* Divide a variable between two separate memory blocks.  */

  add_memory_block (&testglob2, 1);

  add_memory_block (((char*) &testglob2) + 1, sizeof (testglob2) - 1);

  /* Go back and patch in the frame size.  */

  int_x = trptr - tfsizeptr - sizeof (int);

  memcpy (tfsizeptr, &int_x, 4);

  /* Write end of tracebuffer marker.  */

  memset (trptr, 0, 6);

  trptr += 6;

  write (fd, trbuf, trptr - trbuf);

  finish_trace_file (fd);

}

/* Convert number NIB to a hex digit.  */

static int

tohex (int nib)

{

  if (nib < 10)

    return '0' + nib;

  else

    return 'a' + nib - 10;

}

int

bin2hex (const char *bin, char *hex, int count)

{

  int i;

  for (i = 0; i < count; i++)

    {

      *hex++ = tohex ((*bin >> 4) & 0xf);

      *hex++ = tohex (*bin++ & 0xf);

    }

  *hex = 0;

  return i;

}

void

write_error_trace_file (void)

{

  int fd;

  const char made_up[] = "made-up error";

  int len = sizeof (made_up) - 1;

  char *hex = alloca (len * 2 + 1);

  fd = start_trace_file ("error.tf");

  /* The next part of the file consists of newline-separated lines

     defining status, tracepoints, etc.  The section is terminated by

     an empty line.  */

  /* Dump the size of the R (register) blocks in traceframes.  */

  snprintf (spbuf, sizeof spbuf, "R %x\n", 500 /* FIXME get from arch */);

  write (fd, spbuf, strlen (spbuf));

  bin2hex (made_up, hex, len);

  /* Dump trace status, in the general form of the qTstatus reply.  */

  snprintf (spbuf, sizeof spbuf,

            "status 0;"

            "terror:%s:1;"

            "tframes:0;tcreated:0;tfree:100;tsize:1000\n",

            hex);

  write (fd, spbuf, strlen (spbuf));

  /* Dump tracepoint definitions, in syntax similar to that used

     for reconnection uploads.  */

  /* FIXME need a portable way to print function address in hex */

  snprintf (spbuf, sizeof spbuf, "tp T1:%lx:E:0:0\n",

            (long) &write_basic_trace_file);

  write (fd, spbuf, strlen (spbuf));

  /* (Note that we would only need actions defined if we wanted to

     test tdump.) */

  /* Empty line marks the end of the definition section.  */

  write (fd, "\n", 1);

  trptr = trbuf;

  /* Write end of tracebuffer marker.  */

  memset (trptr, 0, 6);

  trptr += 6;

  write (fd, trbuf, trptr - trbuf);

  finish_trace_file (fd);

}

void

done_making_trace_files (void)

{

}

int

main (int argc, char **argv, char **envp)

{

  write_basic_trace_file ();

  write_error_trace_file ();

  done_making_trace_files ();

  return 0;

}