(struct bb): Add flags field.
(HAVE_POPEN): Test new define.
(struct __bb, struct bb_{edge,func}): New structs.
(__bb_init_{prg,file},__bb_{init,exit}_trace_func,__bb_trace_ret,
(__bb_trace_func{,_ret},gopen,gclose): New functions.
From-SVN: r10850
This commit is contained in:
Richard Kenner
parent
47431dff3c
commit
90b4a76470
734
gcc/libgcc2.c
734
gcc/libgcc2.c
@ -1450,6 +1450,7 @@ struct bb
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const char **functions;
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const long *line_nums;
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const char **filenames;
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char *flags;
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};
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#ifdef BLOCK_PROFILER_CODE
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@ -1513,11 +1514,11 @@ __bb_exit_func (void)
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/* This is somewhat type incorrect, but it avoids worrying about
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exactly where time.h is included from. It should be ok unless
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a void * differs from other pointer formats, or if sizeof(long)
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a void * differs from other pointer formats, or if sizeof (long)
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is < sizeof (time_t). It would be nice if we could assume the
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use of rationale standards here. */
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time((void *) &time_value);
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time ((void *) &time_value);
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fprintf (file, "Basic block profiling finished on %s\n", ctime ((void *) &time_value));
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/* We check the length field explicitly in order to allow compatibility
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@ -1632,6 +1633,735 @@ __bb_init_func (struct bb *blocks)
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bb_head = blocks;
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}
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#ifndef MACHINE_STATE_SAVE
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#define MACHINE_STATE_SAVE(ID)
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#endif
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#ifndef MACHINE_STATE_RESTORE
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#define MACHINE_STATE_RESTORE(ID)
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#endif
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#include <string.h>
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/* Number of buckets in hashtable of basic block addresses. */
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#define BB_BUCKETS 311
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/* Maximum length of string in file bb.in. */
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#define BBINBUFSIZE 500
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/* BBINBUFSIZE-1 with double quotes. We could use #BBINBUFSIZE or
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"BBINBUFSIZE" but want to avoid trouble with preprocessors. */
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#define BBINBUFSIZESTR "499"
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struct bb_edge
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{
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struct bb_edge *next;
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unsigned long src_addr;
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unsigned long dst_addr;
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unsigned long count;
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};
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enum bb_func_mode
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{
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TRACE_KEEP = 0, TRACE_ON = 1, TRACE_OFF = 2
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};
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struct bb_func
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{
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struct bb_func *next;
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char *funcname;
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char *filename;
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enum bb_func_mode mode;
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};
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/* This is the connection to the outside world.
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The BLOCK_PROFILER macro must set __bb.blocks
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and __bb.blockno. */
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struct {
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unsigned long blockno;
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struct bb *blocks;
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} __bb;
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/* Vars to store addrs of source and destination basic blocks
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of a jump. */
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static unsigned long bb_src = 0;
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static unsigned long bb_dst = 0;
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static FILE *bb_tracefile = (FILE*)0;
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static struct bb_edge **bb_hashbuckets = (struct bb_edge**)0;
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static struct bb_func *bb_func_head = (struct bb_func*)0;
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static unsigned long bb_callcount = 0;
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static int bb_mode = 0;
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static unsigned long *bb_stack = (unsigned long *)0;
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static size_t bb_stacksize = 0;
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static int reported = 0;
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/* Trace modes:
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Always : Print execution frequencies of basic blocks
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to file bb.out.
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bb_mode & 1 != 0 : Dump trace of basic blocks to file bbtrace[.gz]
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bb_mode & 2 != 0 : Print jump frequencies to file bb.out.
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bb_mode & 4 != 0 : Cut call instructions from basic block flow.
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bb_mode & 8 != 0 : Insert return instructions in basic block flow.
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*/
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#ifdef HAVE_POPEN
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/*#include <sys/types.h>*/
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#include <sys/stat.h>
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/*#include <malloc.h>*/
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/* Commands executed by gopen. */
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#define GOPENDECOMPRESS "gzip -cd "
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#define GOPENCOMPRESS "gzip -c >"
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/* Like fopen but pipes through gzip. mode may only be "r" or "w".
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If it does not compile, simply replace gopen by fopen and delete
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'.gz' from any first parameter to gopen. */
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static FILE *
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gopen (fn, mode)
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char *fn;
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char *mode;
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{
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int use_gzip;
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char *p;
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if (mode[1])
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return (FILE*)0;
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if (mode[0] != 'r' && mode[0] != 'w')
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return (FILE*)0;
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p = fn + strlen (fn)-1;
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use_gzip = ((p[-1] == '.' && (p[0] == 'Z' || p[0] == 'z')) ||
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(p[-2] == '.' && p[-1] == 'g' && p[0] == 'z'));
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if (use_gzip)
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{
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if (mode[0]=='r')
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{
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FILE *f;
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char *s = (char*) malloc (sizeof (char) * strlen (fn)
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+ sizeof (GOPENDECOMPRESS));
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strcpy (s, GOPENDECOMPRESS);
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strcpy (s + (sizeof (GOPENDECOMPRESS)-1), fn);
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f = popen (s, mode);
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free (s);
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return f;
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}
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else
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{
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FILE *f;
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char *s = (char*) malloc (sizeof (char) * strlen (fn)
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+ sizeof (GOPENCOMPRESS));
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strcpy (s, GOPENCOMPRESS);
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strcpy (s + (sizeof (GOPENCOMPRESS)-1), fn);
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if (!(f = popen (s, mode)))
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f = fopen (s, mode);
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free (s);
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return f;
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}
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}
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else
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return fopen (fn, mode);
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}
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static int
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gclose (f)
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FILE *f;
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{
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struct stat buf;
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if (f != NULL)
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{
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if (!fstat (fileno (f), &buf) && S_ISFIFO (buf.st_mode))
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return pclose (f);
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return fclose (f);
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}
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return 0;
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}
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#endif /* HAVE_POPEN */
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/* Called once per program. */
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static void
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__bb_exit_trace_func ()
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{
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FILE *file = fopen ("bb.out", "a");
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struct bb_func *f;
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struct bb_edge *e;
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struct bb *b;
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if (!file)
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perror ("bb.out");
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if (bb_mode & 1)
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{
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if (!bb_tracefile)
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perror ("bbtrace");
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else
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#ifdef HAVE_POPEN
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gclose (bb_tracefile);
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#else
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fclose (bb_tracefile);
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#endif /* HAVE_POPEN */
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}
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/* Check functions in `bb.in'. */
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if (file)
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{
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long time_value;
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const struct bb_func *p;
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int printed_something = 0;
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struct bb *ptr;
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long blk;
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/* This is somewhat type incorrect. */
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time ((void *) &time_value);
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for (p = bb_func_head; p != (struct bb_func *)0; p = p->next)
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{
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for (ptr = bb_head; ptr != (struct bb *)0; ptr = ptr->next)
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{
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if (!ptr->filename || p->filename != (char *)0 && strcmp (p->filename, ptr->filename))
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continue;
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for (blk = 0; blk < ptr->ncounts; blk++)
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{
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if (!strcmp (p->funcname, ptr->functions[blk]))
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goto found;
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}
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}
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if (!printed_something)
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{
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fprintf (file, "Functions in `bb.in' not executed during basic block profiling on %s\n", ctime ((void *) &time_value));
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printed_something = 1;
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}
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fprintf (file, "\tFunction %s", p->funcname);
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if (p->filename)
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fprintf (file, " of file %s", p->filename);
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fprintf (file, "\n" );
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found: ;
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}
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if (printed_something)
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fprintf (file, "\n");
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}
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if (bb_mode & 2)
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{
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if (!bb_hashbuckets)
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{
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if (!reported)
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{
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fprintf (stderr, "Profiler: out of memory\n");
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reported = 1;
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}
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return;
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}
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else if (file)
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{
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long time_value;
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int i;
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unsigned long addr_max = 0;
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unsigned long cnt_max = 0;
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int cnt_len;
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int addr_len;
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/* This is somewhat type incorrect, but it avoids worrying about
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exactly where time.h is included from. It should be ok unless
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a void * differs from other pointer formats, or if sizeof (long)
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is < sizeof (time_t). It would be nice if we could assume the
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use of rationale standards here. */
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time ((void *) &time_value);
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fprintf (file, "Basic block jump tracing");
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switch (bb_mode & 12)
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{
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case 0:
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fprintf (file, " (with call)");
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break;
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case 4:
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/* Print nothing. */
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break;
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case 8:
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fprintf (file, " (with call & ret)");
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break;
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case 12:
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fprintf (file, " (with ret)");
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break;
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}
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fprintf (file, " finished on %s\n", ctime ((void *) &time_value));
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for (i = 0; i < BB_BUCKETS; i++)
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{
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struct bb_edge *bucket = bb_hashbuckets[i];
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for ( ; bucket; bucket = bucket->next )
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{
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if (addr_max < bucket->src_addr)
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addr_max = bucket->src_addr;
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if (addr_max < bucket->dst_addr)
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addr_max = bucket->dst_addr;
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if (cnt_max < bucket->count)
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cnt_max = bucket->count;
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}
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}
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addr_len = num_digits (addr_max, 16);
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cnt_len = num_digits (cnt_max, 10);
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for ( i = 0; i < BB_BUCKETS; i++)
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{
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struct bb_edge *bucket = bb_hashbuckets[i];
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for ( ; bucket; bucket = bucket->next )
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{
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fprintf (file, "Jump from block 0x%.*lx to "
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"block 0x%.*lx executed %*d time(s)\n",
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addr_len, bucket->src_addr,
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addr_len, bucket->dst_addr,
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cnt_len, bucket->count);
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}
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}
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fprintf (file, "\n");
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}
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}
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if (file)
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fclose (file);
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/* Free allocated memory. */
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f = bb_func_head;
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while (f)
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{
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struct bb_func *old = f;
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f = f->next;
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if (old->funcname) free (old->funcname);
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if (old->filename) free (old->filename);
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free (old);
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}
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||||
if (bb_stack)
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free (bb_stack);
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||||
if (bb_hashbuckets)
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||||
{
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int i;
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for (i = 0; i < BB_BUCKETS; i++)
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||||
{
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||||
struct bb_edge *old, *bucket = bb_hashbuckets[i];
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||||
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||||
while (bucket)
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||||
{
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||||
old = bucket;
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||||
bucket = bucket->next;
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||||
free (old);
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||||
}
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||||
}
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||||
free (bb_hashbuckets);
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||||
}
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||||
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||||
for (b = bb_head; b; b = b->next)
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||||
if (b->flags) free (b->flags);
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||||
}
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||||
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||||
/* Called once per program. */
|
||||
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||||
static void
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||||
__bb_init_prg ()
|
||||
{
|
||||
|
||||
FILE *file;
|
||||
char buf[BBINBUFSIZE];
|
||||
const char *p;
|
||||
const char *pos;
|
||||
enum bb_func_mode m;
|
||||
|
||||
#ifdef ON_EXIT
|
||||
/* Initialize destructor. */
|
||||
ON_EXIT (__bb_exit_func, 0);
|
||||
#endif
|
||||
|
||||
if (!(file = fopen ("bb.in", "r")))
|
||||
return;
|
||||
|
||||
while(fscanf (file, " %" BBINBUFSIZESTR "s ", buf) != EOF)
|
||||
{
|
||||
p = buf;
|
||||
if (*p == '-')
|
||||
{
|
||||
m = TRACE_OFF;
|
||||
p++;
|
||||
}
|
||||
else
|
||||
{
|
||||
m = TRACE_ON;
|
||||
}
|
||||
if (!strcmp (p, "__bb_trace__"))
|
||||
bb_mode |= 1;
|
||||
else if (!strcmp (p, "__bb_jumps__"))
|
||||
bb_mode |= 2;
|
||||
else if (!strcmp (p, "__bb_hidecall__"))
|
||||
bb_mode |= 4;
|
||||
else if (!strcmp (p, "__bb_showret__"))
|
||||
bb_mode |= 8;
|
||||
else
|
||||
{
|
||||
struct bb_func *f = (struct bb_func*) malloc (sizeof (struct bb_func));
|
||||
if (f)
|
||||
{
|
||||
unsigned long l;
|
||||
f->next = bb_func_head;
|
||||
if (pos = strchr (p, ':'))
|
||||
{
|
||||
if (!(f->funcname = (char*) malloc (strlen (pos+1)+1)))
|
||||
continue;
|
||||
strcpy (f->funcname, pos+1);
|
||||
l = pos-p;
|
||||
if ((f->filename = (char*) malloc (l+1)))
|
||||
{
|
||||
strncpy (f->filename, p, l);
|
||||
f->filename[l] = '\0';
|
||||
}
|
||||
else
|
||||
f->filename = (char*)0;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!(f->funcname = (char*) malloc (strlen (p)+1)))
|
||||
continue;
|
||||
strcpy (f->funcname, p);
|
||||
f->filename = (char*)0;
|
||||
}
|
||||
f->mode = m;
|
||||
bb_func_head = f;
|
||||
}
|
||||
}
|
||||
}
|
||||
fclose (file);
|
||||
|
||||
#ifdef HAVE_POPEN
|
||||
|
||||
if (bb_mode & 1)
|
||||
bb_tracefile = gopen ("bbtrace.gz", "w");
|
||||
|
||||
#else
|
||||
|
||||
if (bb_mode & 1)
|
||||
bb_tracefile = fopen ("bbtrace", "w");
|
||||
|
||||
#endif /* HAVE_POPEN */
|
||||
|
||||
if (bb_mode & 2)
|
||||
{
|
||||
bb_hashbuckets = (struct bb_edge **)
|
||||
malloc (BB_BUCKETS * sizeof (struct bb_edge *));
|
||||
if (bb_hashbuckets)
|
||||
bzero (bb_hashbuckets, BB_BUCKETS);
|
||||
}
|
||||
|
||||
if (bb_mode & 12)
|
||||
{
|
||||
bb_stacksize = 10;
|
||||
bb_stack = (unsigned long *) malloc (bb_stacksize * sizeof (*bb_stack));
|
||||
}
|
||||
|
||||
#ifdef ON_EXIT
|
||||
/* Initialize destructor. */
|
||||
ON_EXIT (__bb_exit_trace_func, 0);
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
/* Called upon entering a basic block. */
|
||||
|
||||
void
|
||||
__bb_trace_func ()
|
||||
{
|
||||
struct bb_edge *bucket;
|
||||
|
||||
MACHINE_STATE_SAVE("1")
|
||||
|
||||
if (!bb_callcount || (__bb.blocks->flags && (__bb.blocks->flags[__bb.blockno] & TRACE_OFF)))
|
||||
goto skip;
|
||||
|
||||
bb_dst = __bb.blocks->addresses[__bb.blockno];
|
||||
__bb.blocks->counts[__bb.blockno]++;
|
||||
|
||||
if (bb_tracefile)
|
||||
{
|
||||
fwrite (&bb_dst, sizeof (unsigned long), 1, bb_tracefile);
|
||||
}
|
||||
|
||||
if (bb_hashbuckets)
|
||||
{
|
||||
struct bb_edge **startbucket, **oldnext;
|
||||
|
||||
oldnext = startbucket =
|
||||
& bb_hashbuckets[ (((int)bb_src*8)^(int)bb_dst) % BB_BUCKETS ];
|
||||
bucket = *startbucket;
|
||||
|
||||
for (bucket = *startbucket; bucket;
|
||||
oldnext = &(bucket->next), bucket = *oldnext)
|
||||
{
|
||||
if ( bucket->src_addr == bb_src &&
|
||||
bucket->dst_addr == bb_dst )
|
||||
{
|
||||
bucket->count++;
|
||||
*oldnext = bucket->next;
|
||||
bucket->next = *startbucket;
|
||||
*startbucket = bucket;
|
||||
goto ret;
|
||||
}
|
||||
}
|
||||
|
||||
bucket = (struct bb_edge *) malloc (sizeof (struct bb_edge));
|
||||
|
||||
if (!bucket)
|
||||
{
|
||||
if (!reported)
|
||||
{
|
||||
fprintf (stderr, "Profiler: out of memory\n");
|
||||
reported = 1;
|
||||
}
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
bucket->src_addr = bb_src;
|
||||
bucket->dst_addr = bb_dst;
|
||||
bucket->next = *startbucket;
|
||||
*startbucket = bucket;
|
||||
bucket->count = 1;
|
||||
}
|
||||
}
|
||||
|
||||
ret:
|
||||
bb_src = bb_dst;
|
||||
|
||||
skip:
|
||||
;
|
||||
|
||||
MACHINE_STATE_RESTORE("1")
|
||||
|
||||
}
|
||||
|
||||
/* Called when returning from a function and `__bb_showret__' is set. */
|
||||
|
||||
static void
|
||||
__bb_trace_func_ret ()
|
||||
{
|
||||
struct bb_edge *bucket;
|
||||
|
||||
if (!bb_callcount || (__bb.blocks->flags && (__bb.blocks->flags[__bb.blockno] & TRACE_OFF)))
|
||||
goto skip;
|
||||
|
||||
if (bb_hashbuckets)
|
||||
{
|
||||
struct bb_edge **startbucket, **oldnext;
|
||||
|
||||
oldnext = startbucket =
|
||||
& bb_hashbuckets[ (((int)bb_dst*8)^(int)bb_src) % BB_BUCKETS ];
|
||||
bucket = *startbucket;
|
||||
|
||||
for (bucket = *startbucket; bucket;
|
||||
oldnext = &(bucket->next), bucket = *oldnext)
|
||||
{
|
||||
if ( bucket->src_addr == bb_dst &&
|
||||
bucket->dst_addr == bb_src )
|
||||
{
|
||||
bucket->count++;
|
||||
*oldnext = bucket->next;
|
||||
bucket->next = *startbucket;
|
||||
*startbucket = bucket;
|
||||
goto ret;
|
||||
}
|
||||
}
|
||||
|
||||
bucket = (struct bb_edge *) malloc (sizeof (struct bb_edge));
|
||||
|
||||
if (!bucket)
|
||||
{
|
||||
if (!reported)
|
||||
{
|
||||
fprintf (stderr, "Profiler: out of memory\n");
|
||||
reported = 1;
|
||||
}
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
bucket->src_addr = bb_dst;
|
||||
bucket->dst_addr = bb_src;
|
||||
bucket->next = *startbucket;
|
||||
*startbucket = bucket;
|
||||
bucket->count = 1;
|
||||
}
|
||||
}
|
||||
|
||||
ret:
|
||||
bb_dst = bb_src;
|
||||
|
||||
skip:
|
||||
;
|
||||
|
||||
}
|
||||
|
||||
/* Called upon entering the first function of a file. */
|
||||
|
||||
static void
|
||||
__bb_init_file (blocks)
|
||||
struct bb *blocks;
|
||||
{
|
||||
|
||||
const struct bb_func *p;
|
||||
long blk, ncounts = blocks->ncounts;
|
||||
const char **functions = blocks->functions;
|
||||
|
||||
/* Set up linked list. */
|
||||
blocks->zero_word = 1;
|
||||
blocks->next = bb_head;
|
||||
bb_head = blocks;
|
||||
|
||||
blocks->flags = 0;
|
||||
if (!bb_func_head ||
|
||||
!(blocks->flags = (char*) malloc (sizeof (char) * blocks->ncounts)))
|
||||
return;
|
||||
|
||||
for (blk = 0; blk < ncounts; blk++)
|
||||
blocks->flags[blk] = 0;
|
||||
|
||||
for (blk = 0; blk < ncounts; blk++)
|
||||
{
|
||||
for (p = bb_func_head; p; p = p->next)
|
||||
{
|
||||
if (!strcmp (p->funcname, functions[blk]) &&
|
||||
(!p->filename || !strcmp (p->filename, blocks->filename)))
|
||||
{
|
||||
blocks->flags[blk] |= p->mode;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Called when exiting from a function. */
|
||||
|
||||
void
|
||||
__bb_trace_ret ()
|
||||
{
|
||||
|
||||
MACHINE_STATE_SAVE("2")
|
||||
|
||||
if (bb_callcount)
|
||||
{
|
||||
if ((bb_mode & 12) && bb_stacksize > bb_callcount)
|
||||
{
|
||||
bb_src = bb_stack[bb_callcount];
|
||||
if (bb_mode & 8)
|
||||
__bb_trace_func_ret ();
|
||||
}
|
||||
|
||||
bb_callcount -= 1;
|
||||
}
|
||||
|
||||
MACHINE_STATE_RESTORE("2")
|
||||
|
||||
}
|
||||
|
||||
/* Called when entering a function. */
|
||||
|
||||
void
|
||||
__bb_init_trace_func (blocks, blockno)
|
||||
struct bb *blocks;
|
||||
unsigned long blockno;
|
||||
{
|
||||
static int trace_init = 0;
|
||||
|
||||
MACHINE_STATE_SAVE("3")
|
||||
|
||||
if (!blocks->zero_word)
|
||||
{
|
||||
if (!trace_init)
|
||||
{
|
||||
trace_init = 1;
|
||||
__bb_init_prg ();
|
||||
}
|
||||
__bb_init_file (blocks);
|
||||
}
|
||||
|
||||
if (bb_callcount)
|
||||
{
|
||||
|
||||
bb_callcount += 1;
|
||||
|
||||
if (bb_mode & 12)
|
||||
{
|
||||
if (bb_callcount >= bb_stacksize)
|
||||
{
|
||||
size_t newsize = bb_callcount + 100;
|
||||
|
||||
bb_stack = (unsigned long *) realloc (bb_stack, newsize);
|
||||
if (! bb_stack)
|
||||
{
|
||||
if (!reported)
|
||||
{
|
||||
fprintf (stderr, "Profiler: out of memory\n");
|
||||
reported = 1;
|
||||
}
|
||||
bb_stacksize = 0;
|
||||
goto stack_overflow;
|
||||
}
|
||||
bb_stacksize = newsize;
|
||||
}
|
||||
bb_stack[bb_callcount] = bb_src;
|
||||
|
||||
if (bb_mode & 4)
|
||||
bb_src = 0;
|
||||
|
||||
}
|
||||
|
||||
stack_overflow:;
|
||||
|
||||
}
|
||||
|
||||
else if (blocks->flags && (blocks->flags[blockno] & TRACE_ON))
|
||||
{
|
||||
bb_callcount = 1;
|
||||
bb_src = 0;
|
||||
|
||||
if (bb_stack)
|
||||
bb_stack[bb_callcount] = bb_src;
|
||||
}
|
||||
|
||||
MACHINE_STATE_RESTORE("3")
|
||||
}
|
||||
|
||||
#endif /* not inhibit_libc */
|
||||
#endif /* not BLOCK_PROFILER_CODE */
|
||||
#endif /* L_bb */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user