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authorUlrich Drepper <drepper@redhat.com>1997-12-22 20:53:38 +0000
committerUlrich Drepper <drepper@redhat.com>1997-12-22 20:53:38 +0000
commit9756dfe161e523a5d543fb2b1f33a7e682a36342 (patch)
tree88c91bf4a7cb829a3aeb1c0c5d2d529dfaa85b85 /manual/memory.texi
parentbd355af04fc1df69d4ebb6733be170b9baf0dfb5 (diff)
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1997-12-22 18:10 Ulrich Drepper <drepper@cygnus.com> * configure.in: Stop with error if --disable-static is used when the shared lib uses this library. * gen-FAQ.pl: I've perl installed in /usr/bin. * include/bits/xopen_lim.h (STREAM_MAX): Define using FOPEN_MAX. Fix Unix98 conformance problems in the headers. * catgets/nl_types.h: Define nl_item. * grp/grp.h: Define gid_t. * include/features.h [_POSIX_C_SOURCE]: Don't define _XOPEN_SOURCE. * include/nl_types.h: New file. * include/ulimit.h: New file. * io/fcntl.h: Include sys/stat.h for Unix98. Don't define locking constants in POSIX mode. * io/utime.h: Get definition for time_t. * io/sys/stat.h: Define dev_t, gid_t, ino_t, mode_t, nlink_t, off_t, uid_t, pid_t. Define D_IFLNK and S_IFSOCK only if !__USE_UNIX98. * libio/stdio.h: Define va_list. Make snprintf also available is __USE_UNIX98. Declare getopt function and variables. * locale/langinfo.h: Include nl_types.h. Don't define nl_item. Define CODESET, CRNCYSTR, RADIXCHAR and THOUSEP as aliases. * math/math.h: Defined M_* constants as double for Unix98 mode. * posix/fnmatch.h: Pretty print. Define FNM_NOSYS. * posix/glob.h: Pretty print. Define GLOB_NOSYS. * posix/regex.h: Define REG_NOSYS. * posix/wordexp.h: Define WRDE_NOSYS. * posix/unistd.h: Define _POSIX2_VERSION. Define _XOPEN_VERSION to 500 for Unix98. * posix/sys/types.h: Alloc dev_t, mode_t, nlink_t to be defined somewhere else as well. Define clock_t for Unix98. * posix/sys/wait.h: Define pid_t. * pwd/pwd.h: Define gid_t, uid_t. * resource/Makefile (headers): Add ulimit.h. * resource/ulimit.h: New file. * sysdeps/generic/ulimit.c: Define according to X/Open using varargs instead of second argument. * sysdeps/unix/bsd/ulimit.c: Likewise. Use UL_* constants. * sysdeps/unix/sysv/linux/ulimit.c: Likewise. * resource/sys/resource.h: Don't declare ulimit here, include ulimit.h. * signal/signal.h: Define pid_t. * string/string.h: Don't declare BSD string functions in POSIX mode. * sysdeps/generic/bits/confname.h: Define _PC_VDISABLE. Add _SC_XOPEN_LEGACY, _SC_XOPEN_REALTIME and _SC_XOPEN_REALTIME_THREADS. * sysdeps/unix/sysv/linux/bits/termios.h: Clean namespace for Unix98 and POSIX. * inet/test_ifindex.c: Change test so that it does not fail for interface aliases. * locale/programs/locale.c (show_info): Use correct cast sequence for 64bit machines. * malloc/malloc.c: __malloc_initialized now signals three states: uninitialized, initializing, initialized. Used in mcheck. * malloc/mcheck.c (mabort): Add '\n' to messages. (mcheck): Allow installation when malloc is uninitialized or is just initializing. * manual/memory.texi: Explain mtrace output a bit more. * math/libm-test.c: Add more epsilons. * misc/regexp.h (compile): Remove __ prefix from parameter names. * nis/nss_nis/nis-ethers.c (internal_nis_getetherent_r): Use strncpy instead of strcpy for security. * nis/nss_nis/nis-proto.c (internal_nis_getprotoent_r): Likewise. * nis/nss_nis/nis-rpc.c (internal_nis_getrpcent_r): Likewise. * nis/nss_nis/nis-service.c (internal_nis_getservent_r): Likewise. * nss/digits_dots.c: Pretty print. * posix/getconf.c (vars): Add symbols for programming environment recognition. Recognize --version. * sysdeps/generic/sysconf.c: Handle _SC_XBS5_*, _SC_XOPEN_LEGACY, _SC_XOPEN_REALTIME, and _SC_XOPEN_REALTIME_THREADS. * sysdeps/posix/sysconf.c: Handle _SC_XBS5_* and new _XOPEN_* symbols. * sysdeps/generic/bits/stdio_lim.h: Implement handling of __need_FOPEN_MAX. * sysdeps/unix/sysv/linux/stdio_lim.h.in: Likewise. * sysdeps/posix/mk-stdiolim.c: Change to generate file handling __need_FOPEN_MAX. * sysdeps/unix/sysv/linux/Dist: Add rt_sigpending.c. * sysdeps/unix/sysv/linux/rt_sigpending.c: New file. * sysdeps/unix/sysv/linux/alpha/bits/types.h: Define __ipc_pid_t. * sysdeps/unix/sysv/linux/bits/types.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/bits/types.h: Likewise. * sysdeps/unix/sysv/linux/bits/msq.h: Use __ipc_pid_t. * sysdeps/unix/sysv/linux/bits/shm.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/types.h: New file. * sysdeps/wordsize-32/inttypes.h: Add SCNd8, SCNi8, SCNo8, SCNx8, SCNu*. * sysdeps/wordsize-64/inttypes.h: Likewise. * time/africa: Update from tzdata1997j. * time/antarctica: Likewise. * time/asia: Likewise. * time/australasia: Likewise. * time/backward: Likewise. * time/etcetera: Likewise. * time/europe: Likewise. * time/factory: Likewise. * time/northamerica: Likewise. * time/pacificnew: Likewise. * time/southamerica: Likewise. * time/tzfile.h: Update from tzcode1997h. * time/zic.c: Likewise. * wcsmbs/wchar.h: Get definition of FILE. Define `struct tm' tag. Declare wcwidth and wcswidth for __USE_XOPEN. Declare the isw*() functions for Unix98. * wctype/towctrans.c: Define as __towctrans, make towctrans weak alias. * wctype/wctype.h: Declare isw*() functions also if __need_iswxxx is defined. 1997-12-21 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * locale/duplocale.c: Increase usage_count only if less than MAX_USAGE_COUNT. * locale/freelocale.c: Test usage_count against UNDELETABLE, not MAX_USAGE_COUNT. * locale/setlocale.c: Likewise. 1997-12-20 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makefile ($(inst_includedir)/gnu/stubs.h): Use a more direct dependency to make it easier to install it selectively. * Makerules (.SUFFIXES): Don't define any suffixes. 1997-12-20 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/fstatfs64.c: Emulate using fstatfs. * sysdeps/generic/statfs64.c: Emulate using statfs. * sysdeps/generic/getrlimit64.c: Emulate using getrlimit. * sysdeps/generic/setrlimit64.c: Emulate using setrlimit. * sysdpes/generic/ftruncate64.c: New file. * sysdpes/generic/truncate64.c: New file. * sysdeps/generic/bits/stat.h: Add LFS support. * sysdeps/generic/bits/statfs.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/bits/resource.h (RLIM_INFINITY) [__USE_FILE_OFFSET64]: Make long long constant. (RLIM64_INFINITY): Likewise. * sysdeps/unix/sysv/linux/bits/resource.h (RLIM_INFINITY): Correct for LFS support. (RLIM64_INFINITY) [__USE_LARGEFILE64]: Define. * sysdeps/generic/bits/resource.h: Likewise. * misc/Makefile (routines): Add truncate64 and ftruncate64. * include/features.h: Don't prevent LFS support from defining BSD and SYSV things. * dirent/dirent.h [__USE_FILE_OFFSET64]: Don't use xxx64 names. * io/ftw.h [__USE_FILE_OFFSET64]: Likewise. * io/sys/stat.h [__USE_FILE_OFFSET64]: Likewise. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add xxx64 alias for fstatfs, statfs, getrlimit, setrlimit, ftruncate and truncate. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/alpha/fstatfs64.c: New file. * sysdeps/unix/sysv/linux/alpha/statfs64.c: New file. * sysdeps/unix/sysv/linux/alpha/getrlimit64.c: New file. * sysdeps/unix/sysv/linux/alpha/setrlimit64.c: New file. * sysdeps/unix/sysv/linux/alpha/ftruncate64.c: New file. * sysdeps/unix/sysv/linux/alpha/truncate64.c: New file. * sysdeps/unix/sysv/linux/alpha/readdir.c: New file. * sysdeps/unix/sysv/linux/alpha/readdir64.c: New file. * sysdeps/unix/sysv/linux/alpha/readdir64_r.c: New file. * sysdeps/unix/sysv/linux/alpha/readdir_r.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/fstatfs64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/statfs64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/getrlimit64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/setrlimit64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/ftruncate64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/truncate64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/readdir.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/readdir64.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/readdir64_r.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/readdir_r.c: New file. * sysdeps/unix/sysv/linux/fxstat64.c: New file. * sysdeps/unix/sysv/linux/lxstat64.c: New file. * sysdeps/unix/sysv/linux/xstat64.c: New file. * sysdeps/unix/sysv/linux/readdir64.c: New file. * sysdeps/unix/sysv/linux/readdir64_r.c: New file. * sysdeps/unix/sysv/linux/getdents64.c: New file. * sysdeps/unix/sysv/linux/Makefile (sysdep_routines) [$(subdir)=dirent]: Add getdents64. * sysdeps/unix/sysv/linux/Dist: Add getdents64.c. * sysdeps/unix/sysv/linux/xstatconv.c: LFS support. 1997-12-18 12:07 Philip Blundell <pb@nexus.co.uk> * sysdeps/generic/bits/statfs.h (struct statfs64): Added. * sysdeps/generic/getrlimit.c: Include <sys/types.h>. * sysdeps/generic/getrlimit64.c: Likewise. * sysdeps/generic/setrlimit.c: Likewise. * sysdeps/generic/setrlimit64.c: Likewise. 1997-12-17 13:57 Philip Blundell <pb@nexus.co.uk> * sysdeps/unix/sysv/linux/siglist.c: Fix compile problem if not using versioning. * sysdeps/generic/waitid.c: Include <sys/types.h> for id_t. * sysdeps/standalone/arm/bits/errno.h (EBUSY): Added. 1997-12-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * locale/programs/ld-ctype.c (ctype_output): Clear out the padding after the codeset name. 1997-12-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * libc.map: Add get_kernel_syms. 1997-12-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/testrtsig.h (kernel_has_rtsig): Make static. * sysdeps/unix/sysv/linux/testrtsig.h (kernel_has_rtsig): Likewise. Fix condition. 1997-12-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * libio/Makefile (routines) [$(versioning)=yes]: Add oldiofdopen. 1997-12-15 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/fpu/bits/mathinline.h: Don't define exp2 inline. Define scalbln{,f,l} under __USE_ISOC9X, not __USE_MISC. 1997-12-15 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/powerpc/syscall.S: Put back. * sysdeps/unix/sysv/linux/powerpc/sigreturn.S: Delete this instead. Oops. 1997-12-16 Andreas Jaeger <aj@arthur.rhein-neckar.de> * configure.in (libc_cv_gcc_alpha_ng_prefix): Correct quoting. 1997-12-16 Andreas Jaeger <aj@arthur.rhein-neckar.de> * math/libm-test.c (catanh_test): Change epsilon. Reported by H.J. Lu. 1997-12-14 19:39 H.J. Lu <hjl@gnu.org> * libc.map (__getpid): Added for linuxthreads. 1997-12-13 21:09 H.J. Lu <hjl@gnu.org> * configure.in (HAVE_DWARF2_UNWIND_INFO_STATIC): Define it if gcc uses static variable in DWARF2 unwind information for exception support. * config.h.in (HAVE_DWARF2_UNWIND_INFO_STATIC): New. * elf/soinit.c (__libc_global_ctors, _fini): Handle HAVE_DWARF2_UNWIND_INFO_STATIC. * libc.map (__register_frame*, __deregister_frame*): Make them global. 1997-12-15 Andreas Jaeger <aj@arthur.rhein-neckar.de> * math/libm-test.c: Add more tests for "normal" values. 1997-12-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * stdio-common/printf_fphex.c: Fix printing of long double number with a biased exponent of zero. Fix rounding. 1997-12-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sunrpc/rpc_main.c: Accept new flag -$. * sunrpc/Makefile (rpcgen-cmd): Pass it here. 1997-12-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makefile ($(inst_slibdir)/libc-$(version).so): Install the dynamic linker first, in case the interface has changed. 1997-12-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * nss/nss_files/files-alias.c (get_next_alias): Fix parameter order. 1997-12-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * math/tgmath.h: Check for double first, for architectures where sizeof (long double) == sizeof (double). 1997-12-07 Andreas Jaeger <aj@arthur.rhein-neckar.de> * math/libm-test.c: New tests for "normal" values added for most functions.
Diffstat (limited to 'manual/memory.texi')
-rw-r--r--manual/memory.texi23
1 files changed, 19 insertions, 4 deletions
diff --git a/manual/memory.texi b/manual/memory.texi
index a186fd4..343fcd1 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -975,7 +975,7 @@ main (int argc, char *argv[])
@}
@end example
-I.e., the user can start the memory debugger any time he wants if the
+I.e., the user can start the memory debugger any time s/he wants if the
program was started with @code{MALLOC_TRACE} set in the environment.
The output will of course not show the allocations which happened before
the first signal but if there is a memory leak this will show up
@@ -1004,9 +1004,9 @@ readability. Instead there is a program which comes with the GNU C
library which interprets the traces and outputs a summary in on
user-friendly way. The program is called @code{mtrace} (it is in fact a
Perl script) and it takes one or two arguments. In any case the name of
-the file with the trace must be specified. If an optional precedes the
-name of the trace file this must be the name of the program which
-generated the trace.
+the file with the trace output must be specified. If an optional argument
+precedes the name of the trace file this must be the name of the program
+which generated the trace.
@example
drepper$ mtrace tst-mtrace log
@@ -1058,6 +1058,21 @@ Memory not freed:
Suddenly the output makes much more sense and the user can see
immediately where the function calls causing the trouble can be found.
+Interpreting this output is not complicated. There are at most two
+different situations being detected. First, @code{free} was called for
+pointers which were never returned by one of the allocation functions.
+This is usually a very bad problem and how this looks like is shown in
+the first three lines of the output. Situations like this are quite
+rare and if they appear they show up very drastically: the program
+normally crashes.
+
+The other situation which is much harder to detect are memory leaks. As
+you can see in the output the @code{mtrace} function collects all this
+information and so can say that the program calls an allocation function
+from line 33 in the source file @file{/home/drepper/tst-mtrace.c} four
+times without freeing this memory before the program terminates.
+Whether this is a real problem keeps to be investigated.
+
@node Obstacks
@section Obstacks
@cindex obstacks