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2008-11-27 Ken Werner <ken.werner@de.ibm.com> 

* libc/machine/spu/Makefile.am: Add spu-mcount.S spu-gmon.c.
        * libc/machine/spu/Makefile.in: Regenerated.
        * libc/machine/spu/spu-gmon.c: New file.
        * libc/machine/spu/spu-mcount.S: New file.
This commit is contained in:
Jeff Johnston 2008-11-27 20:57:46 +00:00
parent e707c2c9e2
commit 8f337bfef9
5 changed files with 539 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
newlib/ChangeLog
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@ -1,3 +1,10 @@
2008-11-27 Ken Werner <ken.werner@de.ibm.com>
* libc/machine/spu/Makefile.am: Add spu-mcount.S spu-gmon.c.
* libc/machine/spu/Makefile.in: Regenerated.
* libc/machine/spu/spu-gmon.c: New file.
* libc/machine/spu/spu-mcount.S: New file.
2008-11-27 Joel Sherrill <joel.sherrill@oarcorp.com>
* configure.host (*-rtems*): Turn on using portion of unix subdirectory.

3
newlib/libc/machine/spu/Makefile.am
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@ -31,7 +31,8 @@ lib_a_SOURCES += calloc_ea.c free_ea.c malloc_ea.c memchr_ea.c memcmp_ea.c \
munmap_ea.c posix_memalign_ea.c realloc_ea.c strcat_ea.c strchr_ea.c \
strcmp_ea.c strcpy_ea.c strcspn_ea.c strlen_ea.c strncat_ea.c strncmp_ea.c \
strncpy_ea.c strpbrk_ea.c strrchr_ea.c strspn_ea.c strstr_ea.c read_ea.c \
pread_ea.c readv_ea.c write_ea.c pwrite_ea.c writev_ea.c
pread_ea.c readv_ea.c write_ea.c pwrite_ea.c writev_ea.c spu-mcount.S \
spu-gmon.c
endif
lib_a_CCASFLAGS = $(AM_CCASFLAGS)

21
newlib/libc/machine/spu/Makefile.in
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@ -41,7 +41,8 @@ host_triplet = @host@
@HAVE_SPU_EA_TRUE@ munmap_ea.c posix_memalign_ea.c realloc_ea.c strcat_ea.c strchr_ea.c \
@HAVE_SPU_EA_TRUE@ strcmp_ea.c strcpy_ea.c strcspn_ea.c strlen_ea.c strncat_ea.c strncmp_ea.c \
@HAVE_SPU_EA_TRUE@ strncpy_ea.c strpbrk_ea.c strrchr_ea.c strspn_ea.c strstr_ea.c read_ea.c \
@HAVE_SPU_EA_TRUE@ pread_ea.c readv_ea.c write_ea.c pwrite_ea.c writev_ea.c
@HAVE_SPU_EA_TRUE@ pread_ea.c readv_ea.c write_ea.c pwrite_ea.c writev_ea.c spu-mcount.S \
@HAVE_SPU_EA_TRUE@ spu-gmon.c
DIST_COMMON = $(srcdir)/../../../../config.guess \
$(srcdir)/../../../../config.sub $(srcdir)/Makefile.in \
@ -102,7 +103,7 @@ DIST_COMMON = $(srcdir)/../../../../config.guess \
$(srcdir)/../../../../compile $(srcdir)/../../../../compile \
$(srcdir)/../../../../compile $(srcdir)/../../../../compile \
$(srcdir)/../../../../compile $(srcdir)/../../../../compile \
$(srcdir)/../../../../compile
$(srcdir)/../../../../compile $(srcdir)/../../../../compile
subdir = .
ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
am__aclocal_m4_deps = $(top_srcdir)/../../../acinclude.m4 \
@ -149,7 +150,9 @@ lib_a_LIBADD =
@HAVE_SPU_EA_TRUE@ lib_a-readv_ea.$(OBJEXT) \
@HAVE_SPU_EA_TRUE@ lib_a-write_ea.$(OBJEXT) \
@HAVE_SPU_EA_TRUE@ lib_a-pwrite_ea.$(OBJEXT) \
@HAVE_SPU_EA_TRUE@ lib_a-writev_ea.$(OBJEXT)
@HAVE_SPU_EA_TRUE@ lib_a-writev_ea.$(OBJEXT) \
@HAVE_SPU_EA_TRUE@ lib_a-spu-mcount.$(OBJEXT) \
@HAVE_SPU_EA_TRUE@ lib_a-spu-gmon.$(OBJEXT)
am_lib_a_OBJECTS = lib_a-setjmp.$(OBJEXT) lib_a-assert.$(OBJEXT) \
lib_a-clearerr.$(OBJEXT) lib_a-creat.$(OBJEXT) \
lib_a-fclose.$(OBJEXT) lib_a-feof.$(OBJEXT) \
@ -506,6 +509,12 @@ lib_a-spu_timer_flih.o: spu_timer_flih.S
lib_a-spu_timer_flih.obj: spu_timer_flih.S
$(CCAS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-spu_timer_flih.obj `if test -f 'spu_timer_flih.S'; then $(CYGPATH_W) 'spu_timer_flih.S'; else $(CYGPATH_W) '$(srcdir)/spu_timer_flih.S'; fi`
lib_a-spu-mcount.o: spu-mcount.S
$(CCAS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-spu-mcount.o `test -f 'spu-mcount.S' || echo '$(srcdir)/'`spu-mcount.S
lib_a-spu-mcount.obj: spu-mcount.S
$(CCAS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-spu-mcount.obj `if test -f 'spu-mcount.S'; then $(CYGPATH_W) 'spu-mcount.S'; else $(CYGPATH_W) '$(srcdir)/spu-mcount.S'; fi`
.c.o:
$(COMPILE) -c $<
@ -1177,6 +1186,12 @@ lib_a-writev_ea.o: writev_ea.c
lib_a-writev_ea.obj: writev_ea.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-writev_ea.obj `if test -f 'writev_ea.c'; then $(CYGPATH_W) 'writev_ea.c'; else $(CYGPATH_W) '$(srcdir)/writev_ea.c'; fi`
lib_a-spu-gmon.o: spu-gmon.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-spu-gmon.o `test -f 'spu-gmon.c' || echo '$(srcdir)/'`spu-gmon.c
lib_a-spu-gmon.obj: spu-gmon.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-spu-gmon.obj `if test -f 'spu-gmon.c'; then $(CYGPATH_W) 'spu-gmon.c'; else $(CYGPATH_W) '$(srcdir)/spu-gmon.c'; fi`
uninstall-info-am:
ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)

419
newlib/libc/machine/spu/spu-gmon.c Normal file
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@ -0,0 +1,419 @@
/*
(C) Copyright IBM Corp. 2008
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of IBM nor the names of its contributors may be
used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Author: Ken Werner <ken.werner@de.ibm.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <fcntl.h>
#include <ea.h>
#include <spu_intrinsics.h>
#include <spu_mfcio.h>
#include <spu_timer.h>
#include <limits.h>
/* Magic cookie. */
#define GMON_MAGIC_COOKIE "gmon"
/* Version number. */
#define GMON_VERSION 1
/* Fraction of text space to allocate for histogram counters. */
#define HISTFRACTION 4
/* Histogram counter type. */
#define HISTCOUNTER unsigned short
/* Fraction of text space to allocate for "from" hash buckets. HASHFRACTION is
based on the minimum number of bytes of separation between two subroutine
call points in the object code. */
#define HASHFRACTION 4
/* Percent of text space to allocate for tostructs with a minimum. */
#define ARCDENSITY 3
/* Minimal amount of arcs. */
#define MINARCS 50
/* Rounding macros. */
#define ROUNDDOWN(x,y) (((x)/(y))*(y))
#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
/* Sampling rate in Hertz. */
#define SAMPLE_INTERVAL 100
/* Tag definitions for the gmon.out sub headers. */
#define GMON_TAG_TIME_HIST 0
#define GMON_TAG_CG_ARC 1
struct tostruct
{
uintptr_t selfpc;
long count;
unsigned short link;
};
struct gmon_hdr
{
char cookie[4];
int32_t version;
char spare[3 * 4];
};
struct gmon_hist_hdr
{
uintptr_t low_pc;
uintptr_t high_pc;
int32_t hist_size;
int32_t prof_rate;
char dimen[15];
char dimen_abbrev;
} __attribute__ ((packed));
struct rawarc
{
uintptr_t raw_frompc;
uintptr_t raw_selfpc;
long raw_count;
} __attribute__ ((packed));
/* start and end of the text section */
extern char _start;
extern char _etext;
/* froms are indexing tos */
static __ea unsigned short *froms;
static __ea struct tostruct *tos = 0;
static long tolimit = 0;
static uintptr_t s_lowpc = 0;
static uintptr_t s_highpc = 0;
static unsigned long s_textsize = 0;
static int fd;
static int hist_size;
static int timer_id;
void
__sample (int id)
{
unsigned int pc;
unsigned int pc_backup;
off_t offset;
unsigned short val;
if (id != timer_id)
return;
/* Fetch program counter. */
pc = spu_read_srr0 () & ~3;
pc_backup = pc;
if (pc < s_lowpc || pc > s_highpc)
return;
pc -= (uintptr_t) & _start;
offset = pc / HISTFRACTION * sizeof (HISTCOUNTER) + sizeof (struct gmon_hdr)
+ 1 + sizeof (struct gmon_hist_hdr);
/* Read, increment and write the counter. */
if (pread (fd, &val, 2, offset) != 2)
{
perror ("can't read the histogram");
return;
}
if (val < USHRT_MAX)
++val;
if (pwrite (fd, &val, 2, offset) != 2)
{
perror ("can't write the histogram");
}
}
static void
write_histogram (int fd)
{
struct gmon_hist_hdr hist_hdr;
u_char tag = GMON_TAG_TIME_HIST;
hist_hdr.low_pc = s_lowpc;
hist_hdr.high_pc = s_highpc;
hist_hdr.hist_size = hist_size / sizeof (HISTCOUNTER); /* Amount of bins. */
hist_hdr.prof_rate = 100; /* Hertz. */
strncpy (hist_hdr.dimen, "seconds", sizeof (hist_hdr.dimen));
hist_hdr.dimen_abbrev = 's';
struct iovec iov[2] = {
{&tag, sizeof (tag)},
{&hist_hdr, sizeof (struct gmon_hist_hdr)}
};
if (writev (fd, iov, 2) != sizeof (struct gmon_hist_hdr) + sizeof (tag))
perror ("can't write the histogram header");
/* Skip the already written histogram data. */
lseek (fd, hist_size, SEEK_CUR);
}
static void
write_callgraph (int fd)
{
int fromindex, endfrom;
uintptr_t frompc;
int toindex;
struct rawarc rawarc;
u_char tag = GMON_TAG_CG_ARC;
endfrom = s_textsize / (HASHFRACTION * sizeof (*froms));
for (fromindex = 0; fromindex < endfrom; ++fromindex)
{
if (froms[fromindex])
{
frompc = s_lowpc + (fromindex * HASHFRACTION * sizeof (*froms));
for (toindex = froms[fromindex]; toindex != 0;
toindex = tos[toindex].link)
{
rawarc.raw_frompc = frompc;
rawarc.raw_selfpc = tos[toindex].selfpc;
rawarc.raw_count = tos[toindex].count;
struct iovec iov[2] = {
{&tag, sizeof (tag)},
{&rawarc, sizeof (struct rawarc)}
};
if (writev (fd, iov, 2) != sizeof (tag) + sizeof (struct rawarc))
perror ("can't write the callgraph");
}
}
}
}
void
__mcleanup (void)
{
struct gmon_hdr ghdr;
/* Disable sampling. */
spu_timer_stop (timer_id);
spu_timer_free (timer_id);
spu_clock_stop ();
/* Jump to the beginning of the gmon.out file. */
if (lseek (fd, 0, SEEK_SET) == -1)
{
perror ("Cannot seek to the beginning of the gmon.out file.");
close (fd);
return;
}
/* Write the gmon.out header. */
memset (&ghdr, '\0', sizeof (struct gmon_hdr));
memcpy (&ghdr.cookie[0], GMON_MAGIC_COOKIE, sizeof (ghdr.cookie));
ghdr.version = GMON_VERSION;
if (write (fd, &ghdr, sizeof (struct gmon_hdr)) == -1)
{
perror ("Cannot write the gmon header to the gmon.out file.");
close (fd);
return;
}
/* Write the sampling buffer (histogram). */
write_histogram (fd);
/* Write the call graph. */
write_callgraph (fd);
close (fd);
}
void
__monstartup (void)
{
s_lowpc =
ROUNDDOWN ((uintptr_t) & _start, HISTFRACTION * sizeof (HISTCOUNTER));
s_highpc =
ROUNDUP ((uintptr_t) & _etext, HISTFRACTION * sizeof (HISTCOUNTER));
s_textsize = s_highpc - s_lowpc;
hist_size = s_textsize / HISTFRACTION * sizeof (HISTCOUNTER);
/* Allocate froms. */
froms = malloc_ea (s_textsize / HASHFRACTION);
if (froms == NULL)
{
fprintf (stderr, "Cannot allocate ea memory for the froms array.\n");
return;
}
memset_ea (froms, 0, s_textsize / HASHFRACTION);
/* Determine tolimit. */
tolimit = s_textsize * ARCDENSITY / 100;
if (tolimit < MINARCS)
tolimit = MINARCS;
/* Allocate tos. */
tos = malloc_ea (tolimit * sizeof (struct tostruct));
if (tos == NULL)
{
fprintf (stderr, "Cannot allocate ea memory for the tos array.\n");
return;
}
memset_ea (tos, 0, tolimit * sizeof (struct tostruct));
/* Open the gmon.out file. */
fd = open ("gmon.out", O_RDWR | O_CREAT | O_TRUNC, 0644);
if (fd == -1)
{
perror ("can't open gmon.out file");
return;
}
/* Truncate the file up to the size where the histogram fits in. */
if (ftruncate (fd,
sizeof (struct gmon_hdr) + 1 + sizeof (struct gmon_hist_hdr) + hist_size) ==
-1)
perror ("can't truncate the gmon.out file");
/* Start the histogram sampler. */
spu_slih_register (MFC_DECREMENTER_EVENT, spu_clock_slih);
timer_id = spu_timer_alloc (spu_timebase () / SAMPLE_INTERVAL,
__sample);
spu_clock_start ();
spu_timer_start (timer_id);
atexit (__mcleanup);
}
void
__mcount_internal (uintptr_t frompc, uintptr_t selfpc)
{
/* sefpc: the address of the function just entered. */
/* frompc: the caller of the function just entered. */
unsigned int mach_stat;
__ea unsigned short *frompcindex;
unsigned short toindex;
__ea struct tostruct *top;
__ea struct tostruct *prevtop;
/* Save current state and disable interrupts. */
mach_stat = spu_readch(SPU_RdMachStat);
spu_idisable ();
/* Sanity checks. */
if (frompc < s_lowpc || frompc > s_highpc)
goto done;
frompc -= s_lowpc;
if (frompc > s_textsize)
goto done;
/* frompc indexes into the froms array the value at that position indexes
into the tos array. */
frompcindex = &froms[(frompc) / (HASHFRACTION * sizeof (*froms))];
toindex = *frompcindex;
if (toindex == 0)
{
/* First time traversing this arc link of tos[0] incremented. */
toindex = ++tos[0].link;
/* Sanity check. */
if (toindex >= tolimit)
{
--tos[0].link;
goto done;
}
/* Save the index into the froms array for the next time we traverse this arc. */
*frompcindex = toindex;
top = &tos[toindex];
/* Sets the address of the function just entered. */
top->selfpc = selfpc;
top->count = 1;
top->link = 0;
goto done;
}
/* toindex points to a tostruct */
top = &tos[toindex];
if (top->selfpc == selfpc)
{
/* The arc is at front of the chain. This is the most common case. */
top->count++;
goto done;
}
/* top->selfpc != selfpc
The pc we have got is not the pc we already stored (i.e. multiple function
calls to the same fuction within a function. The arc is not at front of
the chain. */
for (;;)
{
if (top->link == 0)
{
/* We are at the end of the chain and selfpc was not found. Thus we create
a new tostruct and link it to the head of the chain. */
toindex = ++tos[0].link;
/* Sanity check. */
if (toindex >= tolimit)
{
--tos[0].link;
goto done;
}
top = &tos[toindex];
top->selfpc = selfpc;
top->count = 1;
/* Link back to the old tos entry. */
top->link = *frompcindex;
/* Store a link to the new top in the froms array which makes the
current tos head of the chain. */
*frompcindex = toindex;
goto done;
}
else
{
/* Otherwise check the next arc on the chain. */
prevtop = top;
top = &tos[top->link];
if (top->selfpc == selfpc)
{
/* selfpc matches; increment its count. */
top->count++;
/* Move it to the head of the chain. */
/* Save previous tos index. */
toindex = prevtop->link;
/* Link the former to to the current tos. */
prevtop->link = top->link;
/* Link back to the old tos entry. */
top->link = *frompcindex;
/* Store a link to the new top in the froms array which makes the
current tos head of the chain. */
*frompcindex = toindex;
goto done;
}
}
}
done:
/* Enable interrupts if necessary. */
if (__builtin_expect (mach_stat & 1, 0))
spu_ienable ();
}

93
newlib/libc/machine/spu/spu-mcount.S Normal file
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@ -0,0 +1,93 @@
/*
(C) Copyright IBM Corp. 2008
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of IBM nor the names of its contributors may be
used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Author: Ken Werner <ken.werner@de.ibm.com>
*/
/* _mcount extracts the address of the function just entered and the address
of the caller of that function and then calls __mcount_internal. The
prologue calls mcount without saving any registers. The return address is
stored in $75. The _mcount function has to:
- create a new stack frame
- save registers $2 to $75 on the stack
- copy the two addresses ($0 and $75) into the argument registers $3 and $4
- call __mcount_internal
- restore registers
- return to $75 */
/* The following two convenience macros assist in the coding of the
saving and restoring the register.
saveregs first, last Saves registers from first to the last.
restoreregs first, last Restores registers from last down to first.
Note: first must be less than or equal to last. */
.macro saveregs first, last
stqd $\first, \first*16($SP)
.if \last-\first
saveregs "(\first+1)",\last
.endif
.endm
.macro restoreregs first, last
lqd $\last, \last*16($SP)
.if \last-\first
restoreregs \first,"(\last-1)"
.endif
.endm
/* _mcount needs to be resident since the overlay manager uses the scratch
registers too. */
.text
.align 3 /* 8 byte alignment. */
.global _mcount
.type _mcount, @function
_mcount:
stqd $lr, 16($sp) /* Save link register in the callers stack frame. */
stqd $lr, -1216($sp) /* Store back pointer. */
il $lr, -1216 /* Push a new stack frame. */
a $sp, $sp, $lr /* Frame size: 16 * (74 + 2) = 1216. */
/* Save registers $2 to $75 on the stack. */
saveregs 2, 75
/* Bring the __mcount_internal arguments in place. */
lqd $3, 1232($sp) /* frompc (the link register). */
ori $4, $75, 0 /* selfpc (the gcc prologue puts "brsl $75, _mcount" in
front of every function). */
brsl $lr, __mcount_internal
/* Restore register $2 to $75 from the stack. */
restoreregs 2, 75
il $lr, 1216
a $sp, $sp, $lr /* Pop the stack frame. */
lqd $lr, 16($sp) /* Restore link register. */
bi $75 /* Branch to the called function. */