diff options
Diffstat (limited to 'mdk-stage1/dietlibc/profiling')
| -rw-r--r-- | mdk-stage1/dietlibc/profiling/PORTING | 25 | ||||
| -rw-r--r-- | mdk-stage1/dietlibc/profiling/README | 37 | ||||
| -rw-r--r-- | mdk-stage1/dietlibc/profiling/__mcount.c | 24 | ||||
| -rw-r--r-- | mdk-stage1/dietlibc/profiling/monitor.c | 93 | ||||
| -rw-r--r-- | mdk-stage1/dietlibc/profiling/profil.c | 75 |
5 files changed, 0 insertions, 254 deletions
diff --git a/mdk-stage1/dietlibc/profiling/PORTING b/mdk-stage1/dietlibc/profiling/PORTING deleted file mode 100644 index c3fc5eba7..000000000 --- a/mdk-stage1/dietlibc/profiling/PORTING +++ /dev/null @@ -1,25 +0,0 @@ - Porting to other platforms - - ... is easy. Just create an mcount.S in the $ARCH - directory (eg. dietlibc/i386) which includes a - function (called "mcount") that: - - 1.) saves ALL registers that are freely usable - and which might be used by __mcount(). - 2.) loads the instruction pointer (PC) from the - function that called mcount, and the function - which called the function, that called mcount - into the first two argument registers (or push - them on the stack - depending on the processor- - architecture). - 3.) call __mcount. - 4.) restore the registers saved in 1) - - Then You need a macro called PC in <asm/sigcontext.h> - which extracts the (instruction pointer / program - counter) from a sigcontext structure (eg. on i386 this - would be ctx.eip). - - $ARCH/start.S must also be modified to call monitor - with the offset of .text and _etext as parameters. - diff --git a/mdk-stage1/dietlibc/profiling/README b/mdk-stage1/dietlibc/profiling/README deleted file mode 100644 index 0a0293073..000000000 --- a/mdk-stage1/dietlibc/profiling/README +++ /dev/null @@ -1,37 +0,0 @@ - - Notes on profiling support for dietlibc - - 1.) A big problem when doing profiling on statically linked - programs, is that the internal profiling functions (mcount - and friends) will be included in the call graph although - they would not if the program would have been dynamically - linked. This is because every symbol between .text and - _etext is included in the call-graph. If a program is - dynamically linked, then mcount and friends are not between - .text and _etext, so they are not included. A workaround - for this, would be to put mcount, __mcount, monitor and - profiler into another section (eg. ".profile"), but this - creates some strange problems, I'm currently not aware of. - If you want to debug this: Putting a function into a specific - section works like this (with gcc): - - void foo (int bar) __attribute__ ((section(".foobar"))) - - 2.) _start may randomly be found in the callgraph. I don't - know why. May be a bug in gprof. - - 3.) The profiling is a complete rewrite, though I looked at - the glibc Version for inspiration. Please note that this - version might not be as portable as the glibc version but - its much smaller (although this is not a really important - argument, as profiled binaries seldom get shipped) and - hopefully easier to understand. - - 4.) all objects that should be profiled mustn't be compiled - with -fomit-frame-pointer (as with glibc). Add - -fno-fomit-frame-pointer to $CFLAGS if you're encountering - weird problems. - - 5.) There is currently no basic-block statistic support. - -Please send comments and bug reports to: tom@rhadamanthys.org diff --git a/mdk-stage1/dietlibc/profiling/__mcount.c b/mdk-stage1/dietlibc/profiling/__mcount.c deleted file mode 100644 index b1955f370..000000000 --- a/mdk-stage1/dietlibc/profiling/__mcount.c +++ /dev/null @@ -1,24 +0,0 @@ -#include <unistd.h> -#include <sys/gmon.h> - -extern struct monparam mparam; - -void __mcount (unsigned long, unsigned long) PROF_SECTION; - -void -__mcount (unsigned long frompc, unsigned long selfpc) -{ - struct rawarc *arc = mparam.arcs, thisarc; - unsigned long num; - /* If arc already exists, increment count */ - for (num = 0; num < mparam.arcnum; num++) - if (arc[num].raw_frompc == frompc && arc[num].raw_selfpc == selfpc) { - arc[num].raw_count++; - return; - } - if (selfpc < mparam.lowpc || selfpc > mparam.highpc) return; - thisarc.raw_frompc = frompc; - thisarc.raw_selfpc = selfpc; - thisarc.raw_count = 1; - arc[mparam.arcnum++] = thisarc; -} diff --git a/mdk-stage1/dietlibc/profiling/monitor.c b/mdk-stage1/dietlibc/profiling/monitor.c deleted file mode 100644 index cc06e3465..000000000 --- a/mdk-stage1/dietlibc/profiling/monitor.c +++ /dev/null @@ -1,93 +0,0 @@ -/************************************************************** - Copyright (C) 2001, 2002 Thomas M. Ogrisegg - - This is free software. You can redistribute and modify - it under the terms of the GNU General Public License. - - This file is part of the profiling support for dietlibc - - monitor(3) interface - - *************************************************************/ -#include <sys/uio.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdlib.h> -#include <sys/gmon.h> - -typedef unsigned short u_short; - -struct monparam mparam; - -void monitor (unsigned long, unsigned long) PROF_SECTION; -void _stop_monitor (void) PROF_SECTION; - -/* - monitor is called by _start, to start profiling - lowpc -> lowest valid program counter (normally .text) - highpc -> highest valid program counter (normally _etext) -*/ -void -monitor (unsigned long lowpc, unsigned long highpc) -{ - mparam.highpc = highpc; - mparam.lowpc = lowpc; - mparam.kcountsize = (mparam.textsize = highpc-lowpc) << 1; - mparam.kcount = (u_short *) malloc (mparam.kcountsize); - mparam.arcs = (struct rawarc *) malloc (MAXARCS*sizeof (struct rawarc)); - if (!mparam.kcount || !mparam.arcs) - exit (42); - mparam.arcnum = 0; - /* start profiling */ - profil (mparam.kcount, highpc-lowpc, lowpc, 10000); -} - -/* - write_gmon - write all data collected by the helper routines - to gmon.out -*/ -static void -write_gmon (void) -{ - struct gmon_hdr ghdr = { "gmon", 1, "" }; - int fd = open ("gmon.out", O_CREAT | O_RDWR | O_TRUNC, 0666); - - if (fd < 0) return; - write (fd, &ghdr, sizeof (ghdr)); - if (mparam.kcountsize) - { - char tag = GMON_TAG_TIME_HIST; - struct gmon_hist_hdr ghdr = { - mparam.lowpc, mparam.highpc, - (mparam.kcountsize >> 1), 100, "seconds", 's' - }; - struct iovec iov[3] = { - { &tag, sizeof (tag) }, - { &ghdr, sizeof (ghdr) }, - { mparam.kcount, mparam.kcountsize >> 1 << 1 } - }; - writev (fd, iov, 3); - } - if (mparam.arcnum) - { - char tag = GMON_TAG_CG_ARC; - struct iovec iov[mparam.arcnum*2]; - unsigned long l; - for (l=0;l<mparam.arcnum;l++) { - iov[l*2].iov_base = &tag; - iov[l*2].iov_len = sizeof (tag); - iov[l*2+1].iov_base = &mparam.arcs[l]; - iov[l*2+1].iov_len = sizeof (mparam.arcs[l]); - } - writev (fd, iov, mparam.arcnum*2); - } - close (fd); -} - -/* called by _start before exit */ -void -_stop_monitor (void) -{ - profil (NULL, 0, 0, 0); - write_gmon (); -} diff --git a/mdk-stage1/dietlibc/profiling/profil.c b/mdk-stage1/dietlibc/profiling/profil.c deleted file mode 100644 index fa9a0ef2b..000000000 --- a/mdk-stage1/dietlibc/profiling/profil.c +++ /dev/null @@ -1,75 +0,0 @@ -/****************************************************** - Copyright (C) 2001, 2002 Thomas M. Ogrisegg - - This is free software. You can redistribute and modify - it under the terms of the GNU General Public License. - - This file is part of the profiling support for dietlibc - - profil (3) generic implementation - - *************************************************************/ - -#include <asm/sigcontext.h> -#include <sys/types.h> -#include <sys/time.h> -#include <unistd.h> -#include <signal.h> - -#define SHORT_SIZE sizeof (short) -#define MAX_SHORT 65536 - -#ifdef DEBUG -# include <stdio.h> -# define debug printf -#else -# define debug -#endif - -#ifndef u_short -# define u_short unsigned short -#endif - -#ifndef u_int -# define u_int unsigned int -#endif - -static unsigned short *buffer = NULL; -static size_t maxhits = 0; -static unsigned long low_pc = 0; -static unsigned long pscale = 0; - -/* profiler - helper function for profil(3) */ -static void -profiler (int signal, struct sigcontext ctx) -{ - size_t s = PC(ctx)-low_pc; - (void)signal; - if ((PC(ctx)) < low_pc) return; - s >>= 1; - if (s < maxhits) - ++buffer[s]; -} - -/* profil(3) - start or stop the profiling timer */ -int -profil (u_short *buf, size_t bufsiz, size_t offset, u_int scale) -{ - struct itimerval itv = { { 0, 1 }, { 0, 1 } }; - struct sigaction sa; - if (!buf) { - sigaction (SIGPROF, NULL, NULL); - setitimer (ITIMER_PROF, NULL, NULL); - return (0); - } - sa.sa_handler = (sighandler_t)&profiler; - sa.sa_flags = SA_RESTART; - sigfillset (&sa.sa_mask); - sigaction (SIGPROF, &sa, NULL); - pscale = scale; - buffer = buf; - low_pc = offset; - maxhits = bufsiz/SHORT_SIZE; - - return (setitimer (ITIMER_PROF, &itv, &itv)); -} |