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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-07-03 14:20:46 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-08-18 10:31:16 -0300
commita748eb31c137e9b69c3d81765271a544f93f8fe5 (patch)
treef69460770ec9e825ff9f8cdbd4d117808750e8fb
parent098b9dd46814f7e624e42a8844c169f3edc67052 (diff)
downloadglibc-a748eb31c137e9b69c3d81765271a544f93f8fe5.tar.gz
Consolidate non cancellable read call
This patch consolidates all the non cancellable read calls to use the __read_nocancel identifier. For non cancellable targets it will be just a macro to call the default respective symbol while on Linux will be a internal one. Also, since it is used on libcrypto it is also exported in GLIBC_PRIVATE namespace. Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu. * sysdeps/generic/not-cancel.h (read_not_cancel): Remove macro. (__read_nocancel): New macro. * sysdeps/unix/sysv/linux/Versions (libc) [GLIBC_PRIVATE]: Add __read_nocancel. * sysdeps/unix/sysv/linux/not-cancel.h (__read_nocancel): Remove macro. (__read_nocancel): New prototype. * sysdeps/unix/sysv/linux/read.c (__read_nocancel): New function. * catgets/open_catalog.c (__open_catalog): Replace read_not_cancel with __read_nocancel. * intl/loadmsgcat.c (read): Likewise. * libio/fileops.c (_IO_file_read): Likewise. * locale/loadlocale.c (_nl_load_locale): Likewise. * login/utmp_file.c (getutent_r_file): Likewise. (internal_getut_r): Likewise. (getutline_r_file): Likewise. * sysdeps/unix/sysv/linux/fips-private.h (fips_enable_p): Likewise. * sysdeps/unix/sysv/linux/gethostid.c (gethostid): Likewise. * sysdeps/unix/sysv/linux/getloadavg.c (getloadavg): Likewise. * sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid): Likewise. * sysdeps/unix/sysv/linux/getsysstats.c (next_line): Likewise. * sysdeps/unix/sysv/linux/i386/smp.h (is_smp_system): Likewise. * sysdeps/unix/sysv/linux/ia64/has_cpuclock.c (has_cpuclock): Likewise. * sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps): Likewise. * sysdeps/unix/sysv/linux/malloc-sysdep.h (check_may_shrink_heap): Likewise. * sysdeps/unix/sysv/linux/pthread_getname.c (pthread_getname_np): Likewise. * sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Likewise.
-rw-r--r--ChangeLog35
-rw-r--r--catgets/open_catalog.c2
-rw-r--r--intl/loadmsgcat.c2
-rw-r--r--libio/fileops.c2
-rw-r--r--locale/loadlocale.c2
-rw-r--r--login/utmp_file.c8
-rw-r--r--sysdeps/generic/not-cancel.h2
-rw-r--r--sysdeps/unix/sysv/linux/Versions1
-rw-r--r--sysdeps/unix/sysv/linux/fips-private.h2
-rw-r--r--sysdeps/unix/sysv/linux/gethostid.c2
-rw-r--r--sysdeps/unix/sysv/linux/getloadavg.c2
-rw-r--r--sysdeps/unix/sysv/linux/getlogin_r.c2
-rw-r--r--sysdeps/unix/sysv/linux/getsysstats.c4
-rw-r--r--sysdeps/unix/sysv/linux/i386/smp.h2
-rw-r--r--sysdeps/unix/sysv/linux/ia64/has_cpuclock.c2
-rw-r--r--sysdeps/unix/sysv/linux/libc_fatal.c2
-rw-r--r--sysdeps/unix/sysv/linux/malloc-sysdep.h2
-rw-r--r--sysdeps/unix/sysv/linux/not-cancel.h10
-rw-r--r--sysdeps/unix/sysv/linux/pthread_getname.c2
-rw-r--r--sysdeps/unix/sysv/linux/read.c12
-rw-r--r--sysdeps/unix/sysv/linux/sysconf.c2
21 files changed, 72 insertions, 28 deletions
diff --git a/ChangeLog b/ChangeLog
index 8da8e34fa9..0030e7d32f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,38 @@
+2017-08-18 Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+ * sysdeps/generic/not-cancel.h (read_not_cancel): Remove macro.
+ (__read_nocancel): New macro.
+ * sysdeps/unix/sysv/linux/Versions (libc) [GLIBC_PRIVATE]: Add
+ __read_nocancel.
+ * sysdeps/unix/sysv/linux/not-cancel.h (__read_nocancel): Remove
+ macro.
+ (__read_nocancel): New prototype.
+ * sysdeps/unix/sysv/linux/read.c (__read_nocancel): New function.
+ * catgets/open_catalog.c (__open_catalog): Replace read_not_cancel
+ with __read_nocancel.
+ * intl/loadmsgcat.c (read): Likewise.
+ * libio/fileops.c (_IO_file_read): Likewise.
+ * locale/loadlocale.c (_nl_load_locale): Likewise.
+ * login/utmp_file.c (getutent_r_file): Likewise.
+ (internal_getut_r): Likewise.
+ (getutline_r_file): Likewise.
+ * sysdeps/unix/sysv/linux/fips-private.h (fips_enable_p): Likewise.
+ * sysdeps/unix/sysv/linux/gethostid.c (gethostid): Likewise.
+ * sysdeps/unix/sysv/linux/getloadavg.c (getloadavg): Likewise.
+ * sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid):
+ Likewise.
+ * sysdeps/unix/sysv/linux/getsysstats.c (next_line): Likewise.
+ * sysdeps/unix/sysv/linux/i386/smp.h (is_smp_system): Likewise.
+ * sysdeps/unix/sysv/linux/ia64/has_cpuclock.c (has_cpuclock):
+ Likewise.
+ * sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps):
+ Likewise.
+ * sysdeps/unix/sysv/linux/malloc-sysdep.h (check_may_shrink_heap):
+ Likewise.
+ * sysdeps/unix/sysv/linux/pthread_getname.c (pthread_getname_np):
+ Likewise.
+ * sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Likewise.
+
2017-08-18 H.J. Lu <hongjiu.lu@intel.com>
[BZ #21966]
diff --git a/catgets/open_catalog.c b/catgets/open_catalog.c
index 4621b263e7..d79a6b1f34 100644
--- a/catgets/open_catalog.c
+++ b/catgets/open_catalog.c
@@ -237,7 +237,7 @@ __open_catalog (const char *cat_name, const char *nlspath, const char *env_var,
/* Save read, handle partial reads. */
do
{
- size_t now = read_not_cancel (fd, (((char *) catalog->file_ptr)
+ size_t now = __read_nocancel (fd, (((char *) catalog->file_ptr)
+ (st.st_size - todo)), todo);
if (now == 0 || now == (size_t) -1)
{
diff --git a/intl/loadmsgcat.c b/intl/loadmsgcat.c
index adca419f07..514e38fed6 100644
--- a/intl/loadmsgcat.c
+++ b/intl/loadmsgcat.c
@@ -447,7 +447,7 @@
file and the name space must not be polluted. */
# define open(name, flags) __open_nocancel (name, flags)
# define close(fd) close_not_cancel_no_status (fd)
-# define read(fd, buf, n) read_not_cancel (fd, buf, n)
+# define read(fd, buf, n) __read_nocancel (fd, buf, n)
# define mmap(addr, len, prot, flags, fd, offset) \
__mmap (addr, len, prot, flags, fd, offset)
# define munmap(addr, len) __munmap (addr, len)
diff --git a/libio/fileops.c b/libio/fileops.c
index 67f3d72020..80bd3f5b95 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -1204,7 +1204,7 @@ _IO_ssize_t
_IO_file_read (_IO_FILE *fp, void *buf, _IO_ssize_t size)
{
return (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0)
- ? read_not_cancel (fp->_fileno, buf, size)
+ ? __read_nocancel (fp->_fileno, buf, size)
: read (fp->_fileno, buf, size));
}
libc_hidden_def (_IO_file_read)
diff --git a/locale/loadlocale.c b/locale/loadlocale.c
index 7416bc300c..781fa8808c 100644
--- a/locale/loadlocale.c
+++ b/locale/loadlocale.c
@@ -238,7 +238,7 @@ _nl_load_locale (struct loaded_l10nfile *file, int category)
char *p = (char *) filedata;
while (to_read > 0)
{
- nread = read_not_cancel (fd, p, to_read);
+ nread = __read_nocancel (fd, p, to_read);
if (__builtin_expect (nread, 1) <= 0)
{
free (filedata);
diff --git a/login/utmp_file.c b/login/utmp_file.c
index 14071165e0..61d03d60cb 100644
--- a/login/utmp_file.c
+++ b/login/utmp_file.c
@@ -187,7 +187,7 @@ getutent_r_file (struct utmp *buffer, struct utmp **result)
}
/* Read the next entry. */
- nbytes = read_not_cancel (file_fd, &last_entry, sizeof (struct utmp));
+ nbytes = __read_nocancel (file_fd, &last_entry, sizeof (struct utmp));
UNLOCK_FILE (file_fd);
@@ -231,7 +231,7 @@ internal_getut_r (const struct utmp *id, struct utmp *buffer,
while (1)
{
/* Read the next entry. */
- if (read_not_cancel (file_fd, buffer, sizeof (struct utmp))
+ if (__read_nocancel (file_fd, buffer, sizeof (struct utmp))
!= sizeof (struct utmp))
{
__set_errno (ESRCH);
@@ -253,7 +253,7 @@ internal_getut_r (const struct utmp *id, struct utmp *buffer,
while (1)
{
/* Read the next entry. */
- if (read_not_cancel (file_fd, buffer, sizeof (struct utmp))
+ if (__read_nocancel (file_fd, buffer, sizeof (struct utmp))
!= sizeof (struct utmp))
{
__set_errno (ESRCH);
@@ -329,7 +329,7 @@ getutline_r_file (const struct utmp *line, struct utmp *buffer,
while (1)
{
/* Read the next entry. */
- if (read_not_cancel (file_fd, &last_entry, sizeof (struct utmp))
+ if (__read_nocancel (file_fd, &last_entry, sizeof (struct utmp))
!= sizeof (struct utmp))
{
__set_errno (ESRCH);
diff --git a/sysdeps/generic/not-cancel.h b/sysdeps/generic/not-cancel.h
index a4f7b7bf05..4fada2f8cc 100644
--- a/sysdeps/generic/not-cancel.h
+++ b/sysdeps/generic/not-cancel.h
@@ -34,7 +34,7 @@
__close (fd)
#define close_not_cancel_no_status(fd) \
(void) __close (fd)
-#define read_not_cancel(fd, buf, n) \
+#define __read_nocancel(fd, buf, n) \
__read (fd, buf, n)
#define write_not_cancel(fd, buf, n) \
__write (fd, buf, n)
diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index 3c64077f05..b553514c27 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -170,6 +170,7 @@ libc {
# functions used in other libraries
__syscall_rt_sigqueueinfo;
__open_nocancel;
+ __read_nocancel;
# functions used by nscd
__netlink_assert_response;
}
diff --git a/sysdeps/unix/sysv/linux/fips-private.h b/sysdeps/unix/sysv/linux/fips-private.h
index 3a83a0f158..775f2c2b50 100644
--- a/sysdeps/unix/sysv/linux/fips-private.h
+++ b/sysdeps/unix/sysv/linux/fips-private.h
@@ -49,7 +49,7 @@ fips_enabled_p (void)
/* This is more than enough, the file contains a single integer. */
char buf[32];
ssize_t n;
- n = TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, sizeof (buf) - 1));
+ n = TEMP_FAILURE_RETRY (__read_nocancel (fd, buf, sizeof (buf) - 1));
close_not_cancel_no_status (fd);
if (n > 0)
diff --git a/sysdeps/unix/sysv/linux/gethostid.c b/sysdeps/unix/sysv/linux/gethostid.c
index 3ea8656b05..6e19dee30a 100644
--- a/sysdeps/unix/sysv/linux/gethostid.c
+++ b/sysdeps/unix/sysv/linux/gethostid.c
@@ -80,7 +80,7 @@ gethostid (void)
fd = __open_nocancel (HOSTIDFILE, O_RDONLY|O_LARGEFILE, 0);
if (fd >= 0)
{
- ssize_t n = read_not_cancel (fd, &id, sizeof (id));
+ ssize_t n = __read_nocancel (fd, &id, sizeof (id));
close_not_cancel_no_status (fd);
diff --git a/sysdeps/unix/sysv/linux/getloadavg.c b/sysdeps/unix/sysv/linux/getloadavg.c
index 0bfe41dae4..64bad17046 100644
--- a/sysdeps/unix/sysv/linux/getloadavg.c
+++ b/sysdeps/unix/sysv/linux/getloadavg.c
@@ -42,7 +42,7 @@ getloadavg (double loadavg[], int nelem)
ssize_t nread;
int i;
- nread = read_not_cancel (fd, buf, sizeof buf - 1);
+ nread = __read_nocancel (fd, buf, sizeof buf - 1);
close_not_cancel_no_status (fd);
if (nread <= 0)
return -1;
diff --git a/sysdeps/unix/sysv/linux/getlogin_r.c b/sysdeps/unix/sysv/linux/getlogin_r.c
index 2519792267..1de746b3d3 100644
--- a/sysdeps/unix/sysv/linux/getlogin_r.c
+++ b/sysdeps/unix/sysv/linux/getlogin_r.c
@@ -41,7 +41,7 @@ __getlogin_r_loginuid (char *name, size_t namesize)
/* We are reading a 32-bit number. 12 bytes are enough for the text
representation. If not, something is wrong. */
char uidbuf[12];
- ssize_t n = TEMP_FAILURE_RETRY (read_not_cancel (fd, uidbuf,
+ ssize_t n = TEMP_FAILURE_RETRY (__read_nocancel (fd, uidbuf,
sizeof (uidbuf)));
close_not_cancel_no_status (fd);
diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index e21a34cb9b..d1400d6cc6 100644
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -85,7 +85,7 @@ next_line (int fd, char *const buffer, char **cp, char **re,
*re = buffer + (*re - *cp);
*cp = buffer;
- ssize_t n = read_not_cancel (fd, *re, buffer_end - *re);
+ ssize_t n = __read_nocancel (fd, *re, buffer_end - *re);
if (n < 0)
return NULL;
@@ -96,7 +96,7 @@ next_line (int fd, char *const buffer, char **cp, char **re,
{
/* Truncate too long lines. */
*re = buffer + 3 * (buffer_end - buffer) / 4;
- n = read_not_cancel (fd, *re, buffer_end - *re);
+ n = __read_nocancel (fd, *re, buffer_end - *re);
if (n < 0)
return NULL;
diff --git a/sysdeps/unix/sysv/linux/i386/smp.h b/sysdeps/unix/sysv/linux/i386/smp.h
index c24f2fd748..eb1ac5ddea 100644
--- a/sysdeps/unix/sysv/linux/i386/smp.h
+++ b/sysdeps/unix/sysv/linux/i386/smp.h
@@ -43,7 +43,7 @@ is_smp_system (void)
/* This was not successful. Now try reading the /proc filesystem. */
int fd = __open_nocancel ("/proc/sys/kernel/version", O_RDONLY);
if (__builtin_expect (fd, 0) == -1
- || read_not_cancel (fd, u.buf, sizeof (u.buf)) <= 0)
+ || __read_nocancel (fd, u.buf, sizeof (u.buf)) <= 0)
/* This also didn't work. We give up and say it's a UP machine. */
u.buf[0] = '\0';
diff --git a/sysdeps/unix/sysv/linux/ia64/has_cpuclock.c b/sysdeps/unix/sysv/linux/ia64/has_cpuclock.c
index 04e395bc8d..6aab1e87a6 100644
--- a/sysdeps/unix/sysv/linux/ia64/has_cpuclock.c
+++ b/sysdeps/unix/sysv/linux/ia64/has_cpuclock.c
@@ -37,7 +37,7 @@ has_cpuclock (void)
/* We expect the file to contain a single digit followed by
a newline. If the format changes we better not rely on
the file content. */
- if (read_not_cancel (fd, buf, sizeof buf) != 2
+ if (__read_nocancel (fd, buf, sizeof buf) != 2
|| buf[0] != '0' || buf[1] != '\n')
newval = -1;
diff --git a/sysdeps/unix/sysv/linux/libc_fatal.c b/sysdeps/unix/sysv/linux/libc_fatal.c
index 5b484cf591..ca838a7eca 100644
--- a/sysdeps/unix/sysv/linux/libc_fatal.c
+++ b/sysdeps/unix/sysv/linux/libc_fatal.c
@@ -56,7 +56,7 @@ backtrace_and_maps (int do_abort, bool written, int fd)
int fd2 = __open_nocancel ("/proc/self/maps", O_RDONLY);
char buf[1024];
ssize_t n2;
- while ((n2 = read_not_cancel (fd2, buf, sizeof (buf))) > 0)
+ while ((n2 = __read_nocancel (fd2, buf, sizeof (buf))) > 0)
if (write_not_cancel (fd, buf, n2) != n2)
break;
close_not_cancel_no_status (fd2);
diff --git a/sysdeps/unix/sysv/linux/malloc-sysdep.h b/sysdeps/unix/sysv/linux/malloc-sysdep.h
index cb87b58637..7a7acbadb8 100644
--- a/sysdeps/unix/sysv/linux/malloc-sysdep.h
+++ b/sysdeps/unix/sysv/linux/malloc-sysdep.h
@@ -47,7 +47,7 @@ check_may_shrink_heap (void)
if (fd >= 0)
{
char val;
- ssize_t n = read_not_cancel (fd, &val, 1);
+ ssize_t n = __read_nocancel (fd, &val, 1);
may_shrink_heap = n > 0 && val == '2';
close_not_cancel_no_status (fd);
}
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index 8d897f0a4c..3d26075e11 100644
--- a/sysdeps/unix/sysv/linux/not-cancel.h
+++ b/sysdeps/unix/sysv/linux/not-cancel.h
@@ -34,9 +34,9 @@ libc_hidden_proto (__open_nocancel)
__typeof (open64) __open64_nocancel;
libc_hidden_proto (__open64_nocancel)
-/* Uncancelable read. */
-#define __read_nocancel(fd, buf, len) \
- INLINE_SYSCALL (read, 3, fd, buf, len)
+/* Non cancellable read syscall. */
+__typeof (__read) __read_nocancel;
+libc_hidden_proto (__read_nocancel)
/* Uncancelable write. */
#define __write_nocancel(fd, buf, len) \
@@ -61,10 +61,6 @@ libc_hidden_proto (__open64_nocancel)
(void) ({ INTERNAL_SYSCALL_DECL (err); \
INTERNAL_SYSCALL (close, err, 1, (fd)); })
-/* Uncancelable read. */
-#define read_not_cancel(fd, buf, n) \
- __read_nocancel (fd, buf, n)
-
/* Uncancelable write. */
#define write_not_cancel(fd, buf, n) \
__write_nocancel (fd, buf, n)
diff --git a/sysdeps/unix/sysv/linux/pthread_getname.c b/sysdeps/unix/sysv/linux/pthread_getname.c
index caab2ccb25..93c1dfd729 100644
--- a/sysdeps/unix/sysv/linux/pthread_getname.c
+++ b/sysdeps/unix/sysv/linux/pthread_getname.c
@@ -50,7 +50,7 @@ pthread_getname_np (pthread_t th, char *buf, size_t len)
return errno;
int res = 0;
- ssize_t n = TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, len));
+ ssize_t n = TEMP_FAILURE_RETRY (__read_nocancel (fd, buf, len));
if (n < 0)
res = errno;
else
diff --git a/sysdeps/unix/sysv/linux/read.c b/sysdeps/unix/sysv/linux/read.c
index 2a02c1bae4..e021df89b4 100644
--- a/sysdeps/unix/sysv/linux/read.c
+++ b/sysdeps/unix/sysv/linux/read.c
@@ -18,6 +18,7 @@
#include <unistd.h>
#include <sysdep-cancel.h>
+#include <not-cancel.h>
/* Read NBYTES into BUF from FD. Return the number read or -1. */
ssize_t
@@ -31,3 +32,14 @@ libc_hidden_def (__read)
weak_alias (__libc_read, __read)
libc_hidden_def (read)
weak_alias (__libc_read, read)
+
+#if !IS_IN (rtld)
+ssize_t
+__read_nocancel (int fd, void *buf, size_t nbytes)
+{
+ return INLINE_SYSCALL_CALL (read, fd, buf, nbytes);
+}
+#else
+strong_alias (__libc_read, __read_nocancel)
+#endif
+libc_hidden_def (__read_nocancel)
diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c
index ab068ab43f..f9becfbb33 100644
--- a/sysdeps/unix/sysv/linux/sysconf.c
+++ b/sysdeps/unix/sysv/linux/sysconf.c
@@ -121,7 +121,7 @@ __sysconf (int name)
/* This is more than enough, the file contains a single integer. */
char buf[32];
ssize_t n;
- n = TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, sizeof (buf) - 1));
+ n = TEMP_FAILURE_RETRY (__read_nocancel (fd, buf, sizeof (buf) - 1));
close_not_cancel_no_status (fd);
if (n > 0)