diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-profile.c | 55 |
1 files changed, 24 insertions, 31 deletions
diff --git a/elf/dl-profile.c b/elf/dl-profile.c index 0a4aba1..41214c1 100644 --- a/elf/dl-profile.c +++ b/elf/dl-profile.c @@ -147,8 +147,6 @@ static uint32_t narcs; lists. */ static volatile uint32_t *narcsp; -static volatile uint16_t *kcount; -static size_t kcountsize; struct here_fromstruct { @@ -164,7 +162,6 @@ static volatile uint32_t fromidx; static uintptr_t lowpc; static size_t textsize; -static unsigned int hashfraction; static unsigned int log_hashfraction; @@ -188,11 +185,14 @@ _dl_start_profile (void) size_t tossize; size_t fromssize; uintptr_t highpc; + uint16_t *kcount; + size_t kcountsize; struct gmon_hdr *addr = NULL; off_t expected_size; /* See profil(2) where this is described. */ int s_scale; #define SCALE_1_TO_1 0x10000L + const char *errstr = NULL; /* Compute the size of the sections which contain program code. */ for (ph = GL(dl_profile_map)->l_phdr; @@ -218,7 +218,6 @@ _dl_start_profile (void) HISTFRACTION * sizeof (HISTCOUNTER)); textsize = highpc - lowpc; kcountsize = textsize / HISTFRACTION; - hashfraction = HASHFRACTION; if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) { /* If HASHFRACTION is a power of two, mcount can use shifting @@ -228,14 +227,14 @@ _dl_start_profile (void) expression away since the __ffs implementation is not known to the compiler. Help the compiler by precomputing the usual cases. */ - assert (hashfraction == 2); + assert (HASHFRACTION == 2); if (sizeof (*froms) == 8) log_hashfraction = 4; else if (sizeof (*froms) == 16) log_hashfraction = 5; else - log_hashfraction = __ffs (hashfraction * sizeof (*froms)) - 1; + log_hashfraction = __ffs (HASHFRACTION * sizeof (*froms)) - 1; } else log_hashfraction = -1; @@ -288,22 +287,25 @@ _dl_start_profile (void) fd = __open (filename, O_RDWR | O_CREAT EXTRA_FLAGS, DEFFILEMODE); if (fd == -1) { - /* We cannot write the profiling data so don't do anything. */ char buf[400]; - _dl_error_printf ("%s: cannot open file: %s\n", filename, - __strerror_r (errno, buf, sizeof buf)); + int errnum; + + /* We cannot write the profiling data so don't do anything. */ + errstr = "%s: cannot open file: %s\n"; + print_error: + errnum = errno; + if (fd != -1) + __close (fd); + _dl_error_printf (errstr, filename, + __strerror_r (errnum, buf, sizeof buf)); return; } if (__fxstat64 (_STAT_VER, fd, &st) < 0 || !S_ISREG (st.st_mode)) { /* Not stat'able or not a regular file => don't use it. */ - char buf[400]; - int errnum = errno; - __close (fd); - _dl_error_printf ("%s: cannot stat file: %s\n", filename, - __strerror_r (errnum, buf, sizeof buf)); - return; + errstr = "%s: cannot stat file: %s\n"; + goto print_error; } /* Test the size. If it does not match what we expect from the size @@ -317,14 +319,9 @@ _dl_start_profile (void) if (__lseek (fd, expected_size & ~(GLRO(dl_pagesize) - 1), SEEK_SET) == -1) { - char buf[400]; - int errnum; cannot_create: - errnum = errno; - __close (fd); - _dl_error_printf ("%s: cannot create file: %s\n", filename, - __strerror_r (errnum, buf, sizeof buf)); - return; + errstr = "%s: cannot create file: %s\n"; + goto print_error; } if (TEMP_FAILURE_RETRY (__libc_write (fd, buf, (expected_size @@ -350,12 +347,8 @@ _dl_start_profile (void) MAP_SHARED|MAP_FILE, fd, 0); if (addr == (struct gmon_hdr *) MAP_FAILED) { - char buf[400]; - int errnum = errno; - __close (fd); - _dl_error_printf ("%s: cannot map file: %s\n", filename, - __strerror_r (errnum, buf, sizeof buf)); - return; + errstr = "%s: cannot map file: %s\n"; + goto print_error; } /* We don't need the file descriptor anymore. */ @@ -416,7 +409,7 @@ _dl_start_profile (void) size_t to_index; size_t newfromidx; --idx; - to_index = (data[idx].self_pc / (hashfraction * sizeof (*tos))); + to_index = (data[idx].self_pc / (HASHFRACTION * sizeof (*tos))); newfromidx = fromidx++; froms[newfromidx].here = &data[idx]; froms[newfromidx].link = tos[to_index]; @@ -484,7 +477,7 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) i = selfpc >> log_hashfraction; else - i = selfpc / (hashfraction * sizeof (*tos)); + i = selfpc / (HASHFRACTION * sizeof (*tos)); topcindex = &tos[i]; fromindex = *topcindex; @@ -515,7 +508,7 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc) size_t to_index; size_t newfromidx; to_index = (data[narcs].self_pc - / (hashfraction * sizeof (*tos))); + / (HASHFRACTION * sizeof (*tos))); newfromidx = atomic_exchange_and_add (&fromidx, 1) + 1; froms[newfromidx].here = &data[narcs]; froms[newfromidx].link = tos[to_index]; |