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Use mmap for allocation of buffers used for __abort_msg
This commit is contained in:
parent
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commit
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18
ChangeLog
18
ChangeLog
@ -1,5 +1,23 @@
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2011-05-15 Ulrich Drepper <drepper@gmail.com>
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[BZ #11901]
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* include/stdlib.h: Move include protection to the right place.
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Define abort_msg_s. Declare __abort_msg with it.
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* stdlib/abort.c (__abort_msg): Adjust type.
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* assert/assert.c (__assert_fail_base): New function. Majority
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of code from __assert_fail. Allocate memory for __abort_msg with
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mmap.
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(__assert_fail): Now call __assert_fail_base.
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* assert/assert-perr.c: Remove bulk of implementation. Use
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__assert_fail_base.
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* include/assert.hL Declare __assert_fail_base.
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* sysdeps/posix/libc_fatal.c: Allocate memory for __abort_msg with
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mmap.
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* sysdeps/unix/sysv/linux/libc_fatal.c: Likewise.
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2011-05-14 Ulrich Drepper <drepper@gmail.com>
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[BZ #11952]
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[BZ #12453]
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* elf/dl-open.c (dl_open_worker): Delay calls to _dl_update_slotinfo
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until all modules are registered in the DTV.
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12
NEWS
12
NEWS
@ -9,12 +9,12 @@ Version 2.14
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* The following bugs are resolved with this release:
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386, 11257, 11258, 11487, 11532, 11578, 11653, 11668, 11724, 11945, 11947,
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11952, 12052, 12083, 12158, 12178, 12200, 12346, 12393, 12420, 12432,
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12445, 12449, 12453, 12454, 12460, 12469, 12489, 12509, 12510, 12511,
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12518, 12527, 12541, 12545, 12551, 12582, 12583, 12587, 12597, 12601,
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12611, 12625, 12626, 12631, 12650, 12653, 12655, 12660, 12681, 12685,
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12711, 12713, 12714, 12717, 12723, 12724, 12734, 12738
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386, 11257, 11258, 11487, 11532, 11578, 11653, 11668, 11724, 11901, 11945,
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11947, 11952, 12052, 12083, 12158, 12178, 12200, 12346, 12393, 12420,
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12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489, 12509, 12510,
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12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583, 12587, 12597,
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12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655, 12660, 12681,
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12685, 12711, 12713, 12714, 12717, 12723, 12724, 12734, 12738
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* The RPC implementation in libc is obsoleted. Old programs keep working
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but new programs cannot be linked with the routines in libc anymore.
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@ -1,4 +1,5 @@
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/* Copyright (C) 1994-1998,2001,2002,2005,2009 Free Software Foundation, Inc.
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/* Copyright (C) 1994-1998,2001,2002,2005,2009,2011
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -17,66 +18,23 @@
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02111-1307 USA. */
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#include <assert.h>
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#include <atomic.h>
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#include <libintl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysdep.h>
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#include <unistd.h>
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extern const char *__progname;
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#ifdef USE_IN_LIBIO
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# include <wchar.h>
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# include <libio/iolibio.h>
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# define fflush(s) INTUSE(_IO_fflush) (s)
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#endif
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/* This function, when passed an error number, a filename, and a line
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number, prints a message on the standard error stream of the form:
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a.c:10: foobar: Unexpected error: Computer bought the farm
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a.c:10: foobar: Unexpected error: Computer bought the farm
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It then aborts program execution via a call to `abort'. */
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#ifdef FATAL_PREPARE_INCLUDE
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# include FATAL_PREPARE_INCLUDE
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#endif
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void
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__assert_perror_fail (int errnum,
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const char *file, unsigned int line,
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const char *function)
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{
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char errbuf[1024];
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char *buf;
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#ifdef FATAL_PREPARE
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FATAL_PREPARE;
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#endif
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if (__asprintf (&buf, _("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
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__progname, __progname[0] ? ": " : "",
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file, line,
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function ? function : "", function ? ": " : "",
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__strerror_r (errnum, errbuf, sizeof errbuf)) >= 0)
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{
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/* Print the message. */
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(void) __fxprintf (NULL, "%s", buf);
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(void) fflush (stderr);
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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char *old = atomic_exchange_acq (&__abort_msg, buf);
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free (old);
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}
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else
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{
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/* At least print a minimal message. */
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static const char errstr[] = "Unexpected error.\n";
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__libc_write (STDERR_FILENO, errstr, sizeof (errstr) - 1);
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}
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abort ();
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char *e = __strerror_r (errnum, errbuf, sizeof errbuf);
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__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
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e, file, line, function);
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}
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libc_hidden_def (__assert_perror_fail)
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@ -1,4 +1,4 @@
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/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009
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/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009,2011
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -19,11 +19,13 @@
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#include <assert.h>
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#include <atomic.h>
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#include <ldsodefs.h>
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#include <libintl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysdep.h>
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#include <unistd.h>
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#include <sys/mman.h>
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extern const char *__progname;
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@ -37,7 +39,7 @@ extern const char *__progname;
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/* This function, when passed a string containing an asserted
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expression, a filename, and a line number, prints a message
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on the standard error stream of the form:
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a.c:10: foobar: Assertion `a == b' failed.
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a.c:10: foobar: Assertion `a == b' failed.
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It then aborts program execution via a call to `abort'. */
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#ifdef FATAL_PREPARE_INCLUDE
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@ -45,31 +47,44 @@ extern const char *__progname;
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#endif
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#undef __assert_fail
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void
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__assert_fail (const char *assertion, const char *file, unsigned int line,
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const char *function)
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__assert_fail_base (const char *fmt, const char *assertion, const char *file,
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unsigned int line, const char *function)
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{
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char *buf;
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char *str;
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#ifdef FATAL_PREPARE
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FATAL_PREPARE;
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#endif
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if (__asprintf (&buf, _("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
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int total;
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if (__asprintf (&str, fmt,
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__progname, __progname[0] ? ": " : "",
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file, line,
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function ? function : "", function ? ": " : "",
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assertion) >= 0)
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assertion, &total) >= 0)
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{
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/* Print the message. */
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(void) __fxprintf (NULL, "%s", buf);
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(void) __fxprintf (NULL, "%s", str);
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(void) fflush (stderr);
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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char *old = atomic_exchange_acq (&__abort_msg, buf);
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free (old);
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total = (total + 1 + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
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struct abort_msg_s *buf = __mmap (NULL, total, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE, -1, 0);
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if (__builtin_expect (buf != MAP_FAILED, 1))
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{
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buf->size = total;
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strcpy (buf->msg, str);
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg, buf);
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if (old != NULL)
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__munmap (old, old->size);
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}
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free (str);
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}
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else
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{
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@ -80,4 +95,14 @@ __assert_fail (const char *assertion, const char *file, unsigned int line,
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abort ();
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}
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#undef __assert_fail
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void
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__assert_fail (const char *assertion, const char *file, unsigned int line,
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const char *function)
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{
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__assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n%n"),
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assertion, file, line, function);
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}
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hidden_def(__assert_fail)
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so it has to be repeated here. */
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extern void __assert_fail (__const char *__assertion, __const char *__file,
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unsigned int __line, __const char *__function)
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__THROW __attribute__ ((__noreturn__));
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__THROW __attribute__ ((__noreturn__));
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/* Likewise, but prints the error text for ERRNUM. */
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extern void __assert_perror_fail (int __errnum, __const char *__file,
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@ -13,6 +13,12 @@ extern void __assert_perror_fail (int __errnum, __const char *__file,
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__const char *__function)
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__THROW __attribute__ ((__noreturn__));
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/* The real implementation of the two functions above. */
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extern void __assert_fail_base (const char *fmt, const char *assertion,
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const char *file, unsigned int line,
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const char *function)
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__THROW __attribute__ ((__noreturn__));
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#if !defined NOT_IN_libc || defined IS_IN_rtld
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hidden_proto (__assert_fail)
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hidden_proto (__assert_perror_fail)
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# define __cxa_atexit(func, arg, d) INTUSE(__cxa_atexit) (func, arg, d)
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# endif
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#endif
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extern void *__default_morecore (ptrdiff_t) __THROW;
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libc_hidden_proto (__default_morecore)
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extern char *__abort_msg;
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struct abort_msg_s
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{
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unsigned int size;
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char msg[0];
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};
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extern struct abort_msg_s *__abort_msg;
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libc_hidden_proto (__abort_msg)
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__END_DECLS
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#endif
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#undef __Need_M_And_C
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#endif /* include/stdlib.h */
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/* Copyright (C) 1991,93,1995-1998,2001,02,2009 Free Software Foundation, Inc.
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/* Copyright (C) 1991,1993,1995-1998,2001,2002,2009,2011
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -37,7 +38,7 @@
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#endif
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/* Exported variable to locate abort message in core files etc. */
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char *__abort_msg __attribute__ ((nocommon));
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struct abort_msg_s *__abort_msg __attribute__ ((nocommon));
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libc_hidden_def (__abort_msg)
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/* We must avoid to run in circles. Therefore we remember how far we
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993-1995,1997,2000,2004,2005,2009
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/* Copyright (C) 1993-1995,1997,2000,2004,2005,2009,2011
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -20,6 +20,7 @@
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#include <atomic.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ldsodefs.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdbool.h>
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@ -125,18 +126,28 @@ __libc_message (int do_abort, const char *fmt, ...)
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if (TEMP_FAILURE_RETRY (__writev (fd, iov, nlist)) == total)
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written = true;
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char *buf = do_abort ? malloc (total + 1) : NULL;
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if (buf != NULL)
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if (do_abort)
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{
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char *wp = buf;
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for (int cnt = 0; cnt < nlist; ++cnt)
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wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
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*wp = '\0';
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total = ((total + 1 + GLRO(dl_pagesize) - 1)
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& ~(GLRO(dl_pagesize) - 1));
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struct abort_msg_s *buf = __mmap (NULL, total,
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PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE, -1, 0);
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if (buf != MAP_FAILED)
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{
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buf->size = total;
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char *wp = buf->msg;
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for (int cnt = 0; cnt < nlist; ++cnt)
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wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
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*wp = '\0';
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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char *old = atomic_exchange_acq (&__abort_msg, buf);
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free (old);
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg,
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buf);
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if (old != NULL)
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__munmap (old, old->size);
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}
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}
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}
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993-1995,1997,2000,2002-2005,2009
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/* Copyright (C) 1993-1995,1997,2000,2002-2005,2009,2011
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -20,6 +20,7 @@
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#include <atomic.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ldsodefs.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdbool.h>
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@ -28,6 +29,7 @@
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#include <string.h>
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#include <sysdep.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/syslog.h>
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#include <execinfo.h>
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@ -134,18 +136,28 @@ __libc_message (int do_abort, const char *fmt, ...)
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if (cnt == total)
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written = true;
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char *buf = do_abort ? malloc (total + 1) : NULL;
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if (buf != NULL)
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if (do_abort)
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{
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char *wp = buf;
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for (int cnt = 0; cnt < nlist; ++cnt)
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wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
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*wp = '\0';
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total = ((total + 1 + GLRO(dl_pagesize) - 1)
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& ~(GLRO(dl_pagesize) - 1));
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struct abort_msg_s *buf = __mmap (NULL, total,
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PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE, -1, 0);
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if (__builtin_expect (buf != MAP_FAILED, 1))
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{
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buf->size = total;
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char *wp = buf->msg;
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for (int cnt = 0; cnt < nlist; ++cnt)
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wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
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*wp = '\0';
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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char *old = atomic_exchange_acq (&__abort_msg, buf);
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free (old);
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/* We have to free the old buffer since the application might
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catch the SIGABRT signal. */
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struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg,
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buf);
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if (old != NULL)
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__munmap (old, old->size);
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}
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}
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}
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