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/* This testcase is part of GDB, the GNU debugger.
Copyright 2010-2019 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* 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 <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdint.h>
char spbuf[200];
char trbuf[1000];
char *trptr;
char *tfsizeptr;
/* These globals are put in the trace buffer. */
int testglob = 31415;
int testglob2 = 271828;
/* But these below are not. */
const int constglob = 10000;
int nonconstglob = 14124;
int
start_trace_file (char *filename)
{
int fd;
mode_t mode = S_IRUSR | S_IWUSR;
#ifdef S_IRGRP
mode |= S_IRGRP;
#endif
#ifdef S_IROTH
mode |= S_IROTH;
#endif
fd = open (filename, O_WRONLY|O_CREAT|O_APPEND, mode);
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);
}
static void
tfile_write_64 (uint64_t value)
{
memcpy (trptr, &value, sizeof (uint64_t));
trptr += sizeof (uint64_t);
}
static void
tfile_write_16 (uint16_t value)
{
memcpy (trptr, &value, sizeof (uint16_t));
trptr += sizeof (uint16_t);
}
static void
tfile_write_8 (uint8_t value)
{
memcpy (trptr, &value, sizeof (uint8_t));
trptr += sizeof (uint8_t);
}
static void
tfile_write_addr (char *addr)
{
tfile_write_64 ((uint64_t) (uintptr_t) addr);
}
static void
tfile_write_buf (const void *addr, size_t size)
{
memcpy (trptr, addr, size);
trptr += size;
}
void
add_memory_block (char *addr, int size)
{
tfile_write_8 ('M');
tfile_write_addr (addr);
tfile_write_16 (size);
tfile_write_buf (addr, size);
}
/* Adjust a function's address to account for architectural
particularities. */
static uintptr_t
adjust_function_address (uintptr_t func_addr)
{
#if defined(__thumb__) || defined(__thumb2__)
/* Although Thumb functions are two-byte aligned, function
pointers have the Thumb bit set. Clear it. */
return func_addr & ~1;
#elif defined __powerpc64__ && _CALL_ELF != 2
/* Get function address from function descriptor. */
return *(uintptr_t *) func_addr;
#else
return func_addr;
#endif
}
/* Get a function's address as an integer. */
#define FUNCTION_ADDRESS(FUN) adjust_function_address ((uintptr_t) &FUN)
void
write_basic_trace_file (void)
{
int fd, int_x;
unsigned long long func_addr;
fd = start_trace_file (TFILE_DIR "tfile-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. */
func_addr = FUNCTION_ADDRESS (write_basic_trace_file);
snprintf (spbuf, sizeof spbuf, "tp T1:%llx:E:0:0\n", func_addr);
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 endianness.) */
trptr = trbuf;
tfile_write_16 (1);
tfsizeptr = trptr;
trptr += 4;
add_memory_block ((char *) &testglob, sizeof (testglob));
/* Divide a variable between two separate memory blocks. */
add_memory_block ((char *) &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";
char hex[(sizeof (made_up) - 1) * 2 + 1];
int len = sizeof (made_up) - 1;
fd = start_trace_file (TFILE_DIR "tfile-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. */
snprintf (spbuf, sizeof spbuf, "tp T1:%llx:E:0:0\n",
(unsigned long long) FUNCTION_ADDRESS (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 (void)
{
write_basic_trace_file ();
write_error_trace_file ();
done_making_trace_files ();
return 0;
}
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