diff options
Diffstat (limited to 'gmon/gmon.c')
-rw-r--r-- | gmon/gmon.c | 94 |
1 files changed, 58 insertions, 36 deletions
diff --git a/gmon/gmon.c b/gmon/gmon.c index 6dc4cb5..e00b339 100644 --- a/gmon/gmon.c +++ b/gmon/gmon.c @@ -34,6 +34,7 @@ #include <sys/time.h> #include <sys/gmon.h> #include <sys/gmon_out.h> +#include <sys/uio.h> #include <stdio.h> #include <fcntl.h> @@ -165,21 +166,26 @@ static void write_hist (fd) int fd; { - const u_char tag = GMON_TAG_TIME_HIST; - struct gmon_hist_hdr thdr; + u_char tag = GMON_TAG_TIME_HIST; + struct gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char *)))); if (_gmonparam.kcountsize > 0) { - thdr.low_pc = _gmonparam.lowpc; - thdr.high_pc = _gmonparam.highpc; - thdr.hist_size = _gmonparam.kcountsize / sizeof(HISTCOUNTER); - thdr.prof_rate = __profile_frequency(); - strncpy(thdr.dimen, "seconds", sizeof(thdr.dimen)); + struct iovec iov[3] = + { + { &tag, sizeof (tag) }, + { &thdr, sizeof (struct gmon_hist_hdr) }, + { _gmonparam.kcount, _gmonparam.kcountsize } + }; + + *(char **) thdr.low_pc = (char *) _gmonparam.lowpc; + *(char **) thdr.high_pc = (char *) _gmonparam.highpc; + *(int *) thdr.hist_size = _gmonparam.kcountsize / sizeof (HISTCOUNTER); + *(int *) thdr.prof_rate = __profile_frequency (); + strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen)); thdr.dimen_abbrev = 's'; - write(fd, &tag, sizeof(tag)); - write(fd, &thdr, sizeof(thdr)); - write(fd, _gmonparam.kcount, _gmonparam.kcountsize); + __writev (fd, iov, 3); } } @@ -188,12 +194,19 @@ static void write_call_graph (fd) int fd; { - const u_char tag = GMON_TAG_CG_ARC; - struct gmon_cg_arc_record raw_arc; + u_char tag = GMON_TAG_CG_ARC; + struct gmon_cg_arc_record raw_arc + __attribute__ ((aligned (__alignof__ (char*)))); int from_index, to_index, from_len; u_long frompc; - from_len = _gmonparam.fromssize / sizeof(*_gmonparam.froms); + struct iovec iov[2] = + { + { &tag, sizeof (tag) }, + { &raw_arc, sizeof (struct gmon_cg_arc_record) } + }; + + from_len = _gmonparam.fromssize / sizeof (*_gmonparam.froms); for (from_index = 0; from_index < from_len; ++from_index) { if (_gmonparam.froms[from_index] == 0) @@ -201,17 +214,16 @@ write_call_graph (fd) frompc = _gmonparam.lowpc; frompc += (from_index * _gmonparam.hashfraction - * sizeof(*_gmonparam.froms)); + * sizeof (*_gmonparam.froms)); for (to_index = _gmonparam.froms[from_index]; to_index != 0; to_index = _gmonparam.tos[to_index].link) { - raw_arc.from_pc = frompc; - raw_arc.self_pc = _gmonparam.tos[to_index].selfpc; - raw_arc.count = _gmonparam.tos[to_index].count; + *(char **) raw_arc.from_pc = (char *)frompc; + *(char **) raw_arc.self_pc = (char *)_gmonparam.tos[to_index].selfpc; + *(int *) raw_arc.count = _gmonparam.tos[to_index].count; - write(fd, &tag, sizeof(tag)); - write(fd, &raw_arc, sizeof(raw_arc)); + __writev (fd, iov, 2); } } } @@ -222,22 +234,32 @@ write_bb_counts (fd) int fd; { struct __bb *grp; - const u_char tag = GMON_TAG_BB_COUNT; + u_char tag = GMON_TAG_BB_COUNT; int ncounts; int i; + struct iovec bbhead[2] = + { + { &tag, sizeof (tag) }, + { &ncounts, sizeof (ncounts) } + }; + struct iovec bbbody[2]; + + bbbody[0].iov_len = sizeof (grp->addresses[0]); + bbbody[1].iov_len = sizeof (grp->addresses[0]); + /* Write each group of basic-block info (all basic-blocks in a compilation unit form a single group). */ for (grp = __bb_head; grp; grp = grp->next) { ncounts = grp->ncounts; - write(fd, &tag, sizeof(tag)); - write(fd, &ncounts, sizeof(ncounts)); + __writev (fd, bbhead, 2); for (i = 0; i < ncounts; ++i) { - write(fd, &grp->addresses[i], sizeof(grp->addresses[0])); - write(fd, &grp->counts[i], sizeof(grp->counts[0])); + bbbody[0].iov_base = (char *) &grp->addresses[i]; + bbbody[1].iov_base = &grp->counts[i]; + __writev (fd, bbbody, 2); } } } @@ -246,31 +268,31 @@ write_bb_counts (fd) void _mcleanup () { - struct gmon_hdr ghdr; + struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int)))); int fd; - moncontrol(0); - fd = open("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666); + moncontrol (0); + fd = __open ("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666); if (fd < 0) { - perror("_mcleanup: gmon.out"); + perror ("_mcleanup: gmon.out"); return; } /* write gmon.out header: */ - memset(&ghdr, 0, sizeof(ghdr)); - memcpy(&ghdr.cookie[0], GMON_MAGIC, sizeof(ghdr.cookie)); - ghdr.version = GMON_VERSION; - write(fd, &ghdr, sizeof(ghdr)); + memset (&ghdr, 0, sizeof (struct gmon_hdr)); + memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie)); + *(int *) ghdr.version = GMON_VERSION; + __write (fd, &ghdr, sizeof (struct gmon_hdr)); /* write PC histogram: */ - write_hist(fd); + write_hist (fd); /* write call-graph: */ - write_call_graph(fd); + write_call_graph (fd); /* write basic-block execution counts: */ - write_bb_counts(fd); + write_bb_counts (fd); - close(fd); + __close (fd); } |