diff options
Diffstat (limited to 'gmon')
| -rw-r--r-- | gmon/gmon.c | 52 |
1 files changed, 43 insertions, 9 deletions
diff --git a/gmon/gmon.c b/gmon/gmon.c index 8e2eddd..af2ac1c 100644 --- a/gmon/gmon.c +++ b/gmon/gmon.c @@ -40,6 +40,7 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <stddef.h> #include <unistd.h> #include <libc-internal.h> #include <not-cancel.h> @@ -180,10 +181,18 @@ write_hist (fd) int fd; { u_char tag = GMON_TAG_TIME_HIST; - struct gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char *)))); if (_gmonparam.kcountsize > 0) { + struct real_gmon_hist_hdr + { + char *low_pc; + char *high_pc; + int32_t hist_size; + int32_t prof_rate; + char dimen[15]; + char dimen_abbrev; + } thdr; struct iovec iov[3] = { { &tag, sizeof (tag) }, @@ -191,11 +200,25 @@ write_hist (fd) { _gmonparam.kcount, _gmonparam.kcountsize } }; - *(char **) thdr.low_pc = (char *) _gmonparam.lowpc; - *(char **) thdr.high_pc = (char *) _gmonparam.highpc; - *(int32_t *) thdr.hist_size = (_gmonparam.kcountsize - / sizeof (HISTCOUNTER)); - *(int32_t *) thdr.prof_rate = __profile_frequency (); + if (sizeof (thdr) != sizeof (struct gmon_hist_hdr) + || (offsetof (struct real_gmon_hist_hdr, low_pc) + != offsetof (struct gmon_hist_hdr, low_pc)) + || (offsetof (struct real_gmon_hist_hdr, high_pc) + != offsetof (struct gmon_hist_hdr, high_pc)) + || (offsetof (struct real_gmon_hist_hdr, hist_size) + != offsetof (struct gmon_hist_hdr, hist_size)) + || (offsetof (struct real_gmon_hist_hdr, prof_rate) + != offsetof (struct gmon_hist_hdr, prof_rate)) + || (offsetof (struct real_gmon_hist_hdr, dimen) + != offsetof (struct gmon_hist_hdr, dimen)) + || (offsetof (struct real_gmon_hist_hdr, dimen_abbrev) + != offsetof (struct gmon_hist_hdr, dimen_abbrev))) + abort (); + + thdr.low_pc = (char *) _gmonparam.lowpc; + thdr.high_pc = (char *) _gmonparam.highpc; + thdr.hist_size = _gmonparam.kcountsize / sizeof (HISTCOUNTER); + thdr.prof_rate = __profile_frequency (); strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen)); thdr.dimen_abbrev = 's'; @@ -318,7 +341,6 @@ write_bb_counts (fd) static void write_gmon (void) { - struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int)))); int fd = -1; char *env; @@ -350,9 +372,21 @@ write_gmon (void) } /* write gmon.out header: */ - memset (&ghdr, '\0', sizeof (struct gmon_hdr)); + struct real_gmon_hdr + { + char cookie[4]; + int32_t version; + char spare[3 * 4]; + } ghdr; + if (sizeof (ghdr) != sizeof (struct gmon_hdr) + || (offsetof (struct real_gmon_hdr, cookie) + != offsetof (struct gmon_hdr, cookie)) + || (offsetof (struct real_gmon_hdr, version) + != offsetof (struct gmon_hdr, version))) + abort (); memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie)); - *(int32_t *) ghdr.version = GMON_VERSION; + ghdr.version = GMON_VERSION; + memset (ghdr.spare, '\0', sizeof (ghdr.spare)); write_not_cancel (fd, &ghdr, sizeof (struct gmon_hdr)); /* write PC histogram: */ |