[PATCH 2 0/6] A different approach to starutp-with-shell on macOS

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* [PATCH 2 0/6] A different approach to starutp-with-shell on macOS
@ 2018-10-03 21:02 Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey
                   ` (5 more replies)
  0 siblings, 6 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches

Here's v2 of my series to cache the shell on macOS.

I think this addresses all the comments from the previous patch.

It also incorporates a gnulib bug fix that turned out to be needed in
order to use mkostemp.

Tom

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 4/6] Use mkostemp, not mkstemp
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 1/6] Unify shell-finding logic Tom Tromey
                   ` (4 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

I noticed that gdb could leak file descriptors coming from mkstemp.
This patch fixes the problem by importing the gnulib mkostemp instead,
and then changing gdb to pass O_CLOEXEC.

A small gnulib patch was needed.  This has already been accepted
upstream.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	* unittests/scoped_mmap-selftests.c (test_normal): Use
	gdb_mkostemp_cloexec.
	* unittests/scoped_fd-selftests.c (test_destroy, test_release):
	Use gdb_mkostemp_cloexec.
	* gnulib/aclocal-m4-deps.mk, gnulib/aclocal.m4,
	gnulib/config.in, gnulib/configure,
	gnulib/import/Makefile.am, gnulib/import/Makefile.in,
	gnulib/import/m4/gnulib-cache.m4,
	gnulib/import/m4/gnulib-comp.m4: Update.
	* gnulib/import/m4/mkostemp.m4: New file.
	* gnulib/import/m4/mkstemp.m4: Remove.
	* gnulib/import/mkostemp.c: New file.
	* gnulib/import/mkstemp.m4: Remove.
	* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Remove
	mkstemp, add mkostemp.  Apply new patch.
	* gnulib/import/stdlib.in.h: Apply patch.
	* gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch:
	New file.
	* dwarf-index-write.c (write_psymtabs_to_index): Use
	gdb_mkostemp_cloexec.
	* common/filestuff.h (gdb_mkostemp_cloexec): New function.
---
 gdb/ChangeLog                                 | 24 +++++
 gdb/common/filestuff.h                        | 11 +++
 gdb/dwarf-index-write.c                       |  5 +-
 gdb/gnulib/aclocal-m4-deps.mk                 |  2 +-
 gdb/gnulib/aclocal.m4                         |  2 +-
 gdb/gnulib/config.in                          | 12 ++-
 gdb/gnulib/configure                          | 95 +++----------------
 gdb/gnulib/import/Makefile.am                 | 10 +-
 gdb/gnulib/import/Makefile.in                 | 18 ++--
 gdb/gnulib/import/m4/gnulib-cache.m4          |  4 +-
 gdb/gnulib/import/m4/gnulib-comp.m4           | 17 ++--
 gdb/gnulib/import/m4/mkostemp.m4              | 23 +++++
 gdb/gnulib/import/m4/mkstemp.m4               | 82 ----------------
 gdb/gnulib/import/{mkstemp.c => mkostemp.c}   | 12 +--
 gdb/gnulib/import/stdlib.in.h                 |  3 +-
 ...ps-Fix-compilation-error-in-C-mode-o.patch | 38 ++++++++
 gdb/gnulib/update-gnulib.sh                   |  3 +-
 gdb/unittests/scoped_fd-selftests.c           |  5 +-
 gdb/unittests/scoped_mmap-selftests.c         |  3 +-
 19 files changed, 162 insertions(+), 207 deletions(-)
 create mode 100644 gdb/gnulib/import/m4/mkostemp.m4
 delete mode 100644 gdb/gnulib/import/m4/mkstemp.m4
 rename gdb/gnulib/import/{mkstemp.c => mkostemp.c} (79%)
 create mode 100644 gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch

diff --git a/gdb/common/filestuff.h b/gdb/common/filestuff.h
index ecfc18d600..9a12f83c27 100644
--- a/gdb/common/filestuff.h
+++ b/gdb/common/filestuff.h
@@ -20,6 +20,7 @@
 #define FILESTUFF_H
 
 #include <dirent.h>
+#include <fcntl.h>
 
 /* Note all the file descriptors which are open when this is called.
    These file descriptors will not be closed by close_most_fds.  */
@@ -48,6 +49,16 @@ extern void close_most_fds (void);
 extern int gdb_open_cloexec (const char *filename, int flags,
 			     /* mode_t */ unsigned long mode);
 
+/* Like mkstemp, but ensures that the file descriptor is
+   close-on-exec.  */
+
+static inline int
+gdb_mkostemp_cloexec (char *name_template, int flags = 0)
+{
+  /* gnulib provides a mkostemp replacement if needed.  */
+  return mkostemp (name_template, flags | O_CLOEXEC);
+}
+
 /* Convenience wrapper for the above, which takes the filename as an
    std::string.  */
 
diff --git a/gdb/dwarf-index-write.c b/gdb/dwarf-index-write.c
index dc8660e734..3032798426 100644
--- a/gdb/dwarf-index-write.c
+++ b/gdb/dwarf-index-write.c
@@ -1566,7 +1566,7 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
   gdb::char_vector filename_temp = make_temp_filename (filename);
 
   gdb::optional<scoped_fd> out_file_fd
-    (gdb::in_place, mkstemp (filename_temp.data ()));
+    (gdb::in_place, gdb_mkostemp_cloexec (filename_temp.data (), O_BINARY));
   if (out_file_fd->get () == -1)
     perror_with_name (("mkstemp"));
 
@@ -1590,7 +1590,8 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
       gdb::char_vector filename_str_temp = make_temp_filename (filename_str);
 
       gdb::optional<scoped_fd> out_file_str_fd
-	(gdb::in_place, mkstemp (filename_str_temp.data ()));
+	(gdb::in_place, gdb_mkostemp_cloexec (filename_str_temp.data (),
+					      O_BINARY));
       if (out_file_str_fd->get () == -1)
         perror_with_name (("mkstemp"));
 
diff --git a/gdb/gnulib/aclocal-m4-deps.mk b/gdb/gnulib/aclocal-m4-deps.mk
index d866b6de89..5b2c6cc5ea 100644
--- a/gdb/gnulib/aclocal-m4-deps.mk
+++ b/gdb/gnulib/aclocal-m4-deps.mk
@@ -80,7 +80,7 @@ aclocal_m4_deps = \
 	import/m4/mempcpy.m4 \
 	import/m4/memrchr.m4 \
 	import/m4/mkdir.m4 \
-	import/m4/mkstemp.m4 \
+	import/m4/mkostemp.m4 \
 	import/m4/mmap-anon.m4 \
 	import/m4/mode_t.m4 \
 	import/m4/msvc-inval.m4 \
diff --git a/gdb/gnulib/aclocal.m4 b/gdb/gnulib/aclocal.m4
index 740387ac34..861caf6692 100644
--- a/gdb/gnulib/aclocal.m4
+++ b/gdb/gnulib/aclocal.m4
@@ -1353,7 +1353,7 @@ m4_include([import/m4/memmem.m4])
 m4_include([import/m4/mempcpy.m4])
 m4_include([import/m4/memrchr.m4])
 m4_include([import/m4/mkdir.m4])
-m4_include([import/m4/mkstemp.m4])
+m4_include([import/m4/mkostemp.m4])
 m4_include([import/m4/mmap-anon.m4])
 m4_include([import/m4/mode_t.m4])
 m4_include([import/m4/msvc-inval.m4])
diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index d32b192e0b..d23d208cb2 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -95,6 +95,10 @@
    whether the gnulib module getcwd shall be considered present. */
 #undef GNULIB_GETCWD
 
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module mkostemp shall be considered present. */
+#undef GNULIB_MKOSTEMP
+
 /* Define to a C preprocessor expression that evaluates to 1 or 0, depending
    whether the gnulib module openat shall be considered present. */
 #undef GNULIB_OPENAT
@@ -199,8 +203,8 @@
 /* Define to 1 when the gnulib module memrchr should be tested. */
 #undef GNULIB_TEST_MEMRCHR
 
-/* Define to 1 when the gnulib module mkstemp should be tested. */
-#undef GNULIB_TEST_MKSTEMP
+/* Define to 1 when the gnulib module mkostemp should be tested. */
+#undef GNULIB_TEST_MKOSTEMP
 
 /* Define to 1 when the gnulib module open should be tested. */
 #undef GNULIB_TEST_OPEN
@@ -544,8 +548,8 @@
    when it succeeds. */
 #undef HAVE_MINIMALLY_WORKING_GETCWD
 
-/* Define to 1 if you have the 'mkstemp' function. */
-#undef HAVE_MKSTEMP
+/* Define to 1 if you have the 'mkostemp' function. */
+#undef HAVE_MKOSTEMP
 
 /* Define to 1 if you have the 'mprotect' function. */
 #undef HAVE_MPROTECT
diff --git a/gdb/gnulib/configure b/gdb/gnulib/configure
index dc6c5b6657..5d7f8aa004 100644
--- a/gdb/gnulib/configure
+++ b/gdb/gnulib/configure
@@ -3525,7 +3525,7 @@ gl_func_list="$gl_func_list mbsinit"
 gl_func_list="$gl_func_list mbrtowc"
 gl_header_list="$gl_header_list sys/mman.h"
 gl_func_list="$gl_func_list mprotect"
-gl_func_list="$gl_func_list mkstemp"
+gl_func_list="$gl_func_list mkostemp"
 gl_func_list="$gl_func_list openat"
 gl_func_list="$gl_func_list link"
 gl_func_list="$gl_func_list secure_getenv"
@@ -5841,7 +5841,7 @@ fi
   # Code from module mempcpy:
   # Code from module memrchr:
   # Code from module mkdir:
-  # Code from module mkstemp:
+  # Code from module mkostemp:
   # Code from module msvc-inval:
   # Code from module msvc-nothrow:
   # Code from module multiarch:
@@ -21893,116 +21893,51 @@ $as_echo "#define FUNC_MKDIR_DOT_BUG 1" >>confdefs.h
 
 
 
+
+
   :
 
 
 
 
 
-  if test $ac_cv_func_mkstemp = yes; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working mkstemp" >&5
-$as_echo_n "checking for working mkstemp... " >&6; }
-if ${gl_cv_func_working_mkstemp+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  if test $ac_cv_func_mkostemp != yes; then
+    HAVE_MKOSTEMP=0
+  fi
 
-        mkdir conftest.mkstemp
-        if test "$cross_compiling" = yes; then :
-  case "$host_os" in
-                     # Guess yes on glibc systems.
-             *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
-                     # If we don't know, assume the worst.
-             *)      gl_cv_func_working_mkstemp="guessing no" ;;
-           esac
+  if test $HAVE_MKOSTEMP = 0; then
 
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-int result = 0;
-              int i;
-              off_t large = (off_t) 4294967295u;
-              if (large < 0)
-                large = 2147483647;
-              umask (0);
-              for (i = 0; i < 70; i++)
-                {
-                  char templ[] = "conftest.mkstemp/coXXXXXX";
-                  int (*mkstemp_function) (char *) = mkstemp;
-                  int fd = mkstemp_function (templ);
-                  if (fd < 0)
-                    result |= 1;
-                  else
-                    {
-                      struct stat st;
-                      if (lseek (fd, large, SEEK_SET) != large)
-                        result |= 2;
-                      if (fstat (fd, &st) < 0)
-                        result |= 4;
-                      else if (st.st_mode & 0077)
-                        result |= 8;
-                      if (close (fd))
-                        result |= 16;
-                    }
-                }
-              return result;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  gl_cv_func_working_mkstemp=yes
-else
-  gl_cv_func_working_mkstemp=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
 
-        rm -rf conftest.mkstemp
 
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_working_mkstemp" >&5
-$as_echo "$gl_cv_func_working_mkstemp" >&6; }
-    case "$gl_cv_func_working_mkstemp" in
-      *yes) ;;
-      *)
-        REPLACE_MKSTEMP=1
-        ;;
-    esac
-  else
-    HAVE_MKSTEMP=0
-  fi
 
-  if test $HAVE_MKSTEMP = 0 || test $REPLACE_MKSTEMP = 1; then
 
 
 
 
+  gl_LIBOBJS="$gl_LIBOBJS mkostemp.$ac_objext"
 
 
 
+  fi
 
-  gl_LIBOBJS="$gl_LIBOBJS mkstemp.$ac_objext"
 
+cat >>confdefs.h <<_ACEOF
+#define GNULIB_MKOSTEMP 1
+_ACEOF
 
 
-  fi
 
 
 
 
 
-          GNULIB_MKSTEMP=1
+          GNULIB_MKOSTEMP=1
 
 
 
 
 
-$as_echo "#define GNULIB_TEST_MKSTEMP 1" >>confdefs.h
+$as_echo "#define GNULIB_TEST_MKOSTEMP 1" >>confdefs.h
 
 
 
diff --git a/gdb/gnulib/import/Makefile.am b/gdb/gnulib/import/Makefile.am
index d1bee0bc02..608c2c725c 100644
--- a/gdb/gnulib/import/Makefile.am
+++ b/gdb/gnulib/import/Makefile.am
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 AUTOMAKE_OPTIONS = 1.9.6 gnits
 
@@ -1223,14 +1223,14 @@ EXTRA_libgnu_a_SOURCES += mkdir.c
 
 ## end   gnulib module mkdir
 
-## begin gnulib module mkstemp
+## begin gnulib module mkostemp
 
 
-EXTRA_DIST += mkstemp.c
+EXTRA_DIST += mkostemp.c
 
-EXTRA_libgnu_a_SOURCES += mkstemp.c
+EXTRA_libgnu_a_SOURCES += mkostemp.c
 
-## end   gnulib module mkstemp
+## end   gnulib module mkostemp
 
 ## begin gnulib module msvc-inval
 
diff --git a/gdb/gnulib/import/Makefile.in b/gdb/gnulib/import/Makefile.in
index 7e4d278d91..8b0487ccc7 100644
--- a/gdb/gnulib/import/Makefile.in
+++ b/gdb/gnulib/import/Makefile.in
@@ -35,7 +35,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 
 
@@ -192,7 +192,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
 	$(top_srcdir)/import/m4/mempcpy.m4 \
 	$(top_srcdir)/import/m4/memrchr.m4 \
 	$(top_srcdir)/import/m4/mkdir.m4 \
-	$(top_srcdir)/import/m4/mkstemp.m4 \
+	$(top_srcdir)/import/m4/mkostemp.m4 \
 	$(top_srcdir)/import/m4/mmap-anon.m4 \
 	$(top_srcdir)/import/m4/mode_t.m4 \
 	$(top_srcdir)/import/m4/msvc-inval.m4 \
@@ -1515,7 +1515,7 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h arpa_inet.in.h \
 	malloca.valgrind math.in.h mbrtowc.c mbsinit.c \
 	mbsrtowcs-impl.h mbsrtowcs-state.c mbsrtowcs.c memchr.c \
 	memchr.valgrind memmem.c str-two-way.h mempcpy.c memrchr.c \
-	mkdir.c mkstemp.c msvc-inval.c msvc-inval.h msvc-nothrow.c \
+	mkdir.c mkostemp.c msvc-inval.c msvc-inval.h msvc-nothrow.c \
 	msvc-nothrow.h netinet_in.in.h open.c openat.c openat.h \
 	dirent-private.h opendir.c pathmax.h rawmemchr.c \
 	rawmemchr.valgrind dirent-private.h readdir.c readlink.c \
@@ -1587,11 +1587,11 @@ EXTRA_libgnu_a_SOURCES = alloca.c openat-proc.c canonicalize-lgpl.c \
 	gettimeofday.c glob.c inet_ntop.c isnan.c isnand.c isnan.c \
 	isnanl.c lstat.c malloc.c mbrtowc.c mbsinit.c \
 	mbsrtowcs-state.c mbsrtowcs.c memchr.c memmem.c mempcpy.c \
-	memrchr.c mkdir.c mkstemp.c msvc-inval.c msvc-nothrow.c open.c \
-	openat.c opendir.c rawmemchr.c readdir.c readlink.c realloc.c \
-	rename.c rewinddir.c rmdir.c secure_getenv.c setenv.c stat.c \
-	strchrnul.c strdup.c strerror.c strerror-override.c strstr.c \
-	strtok_r.c unsetenv.c
+	memrchr.c mkdir.c mkostemp.c msvc-inval.c msvc-nothrow.c \
+	open.c openat.c opendir.c rawmemchr.c readdir.c readlink.c \
+	realloc.c rename.c rewinddir.c rmdir.c secure_getenv.c \
+	setenv.c stat.c strchrnul.c strdup.c strerror.c \
+	strerror-override.c strstr.c strtok_r.c unsetenv.c
 
 # Use this preprocessor expression to decide whether #include_next works.
 # Do not rely on a 'configure'-time test for this, since the expression
@@ -1722,7 +1722,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mempcpy.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memrchr.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkdir.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkstemp.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkostemp.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/msvc-inval.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/msvc-nothrow.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/open.Po@am__quote@
diff --git a/gdb/gnulib/import/m4/gnulib-cache.m4 b/gdb/gnulib/import/m4/gnulib-cache.m4
index 442aad5563..8cefb67be7 100644
--- a/gdb/gnulib/import/m4/gnulib-cache.m4
+++ b/gdb/gnulib/import/m4/gnulib-cache.m4
@@ -27,7 +27,7 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+#   gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
@@ -48,7 +48,7 @@ gl_MODULES([
   memchr
   memmem
   mkdir
-  mkstemp
+  mkostemp
   pathmax
   rawmemchr
   readlink
diff --git a/gdb/gnulib/import/m4/gnulib-comp.m4 b/gdb/gnulib/import/m4/gnulib-comp.m4
index 21e4383c34..2c55958eb7 100644
--- a/gdb/gnulib/import/m4/gnulib-comp.m4
+++ b/gdb/gnulib/import/m4/gnulib-comp.m4
@@ -121,7 +121,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module mempcpy:
   # Code from module memrchr:
   # Code from module mkdir:
-  # Code from module mkstemp:
+  # Code from module mkostemp:
   # Code from module msvc-inval:
   # Code from module msvc-nothrow:
   # Code from module multiarch:
@@ -444,12 +444,13 @@ AC_DEFUN([gl_INIT],
   if test $REPLACE_MKDIR = 1; then
     AC_LIBOBJ([mkdir])
   fi
-  gl_FUNC_MKSTEMP
-  if test $HAVE_MKSTEMP = 0 || test $REPLACE_MKSTEMP = 1; then
-    AC_LIBOBJ([mkstemp])
-    gl_PREREQ_MKSTEMP
+  gl_FUNC_MKOSTEMP
+  if test $HAVE_MKOSTEMP = 0; then
+    AC_LIBOBJ([mkostemp])
+    gl_PREREQ_MKOSTEMP
   fi
-  gl_STDLIB_MODULE_INDICATOR([mkstemp])
+  gl_MODULE_INDICATOR([mkostemp])
+  gl_STDLIB_MODULE_INDICATOR([mkostemp])
   AC_REQUIRE([gl_MSVC_INVAL])
   if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
     AC_LIBOBJ([msvc-inval])
@@ -844,7 +845,7 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/mempcpy.c
   lib/memrchr.c
   lib/mkdir.c
-  lib/mkstemp.c
+  lib/mkostemp.c
   lib/msvc-inval.c
   lib/msvc-inval.h
   lib/msvc-nothrow.c
@@ -991,7 +992,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/mempcpy.m4
   m4/memrchr.m4
   m4/mkdir.m4
-  m4/mkstemp.m4
+  m4/mkostemp.m4
   m4/mmap-anon.m4
   m4/mode_t.m4
   m4/msvc-inval.m4
diff --git a/gdb/gnulib/import/m4/mkostemp.m4 b/gdb/gnulib/import/m4/mkostemp.m4
new file mode 100644
index 0000000000..1f44a0390a
--- /dev/null
+++ b/gdb/gnulib/import/m4/mkostemp.m4
@@ -0,0 +1,23 @@
+# mkostemp.m4 serial 2
+dnl Copyright (C) 2009-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MKOSTEMP],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+  dnl Persuade glibc <stdlib.h> to declare mkostemp().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([mkostemp])
+  if test $ac_cv_func_mkostemp != yes; then
+    HAVE_MKOSTEMP=0
+  fi
+])
+
+# Prerequisites of lib/mkostemp.c.
+AC_DEFUN([gl_PREREQ_MKOSTEMP],
+[
+])
diff --git a/gdb/gnulib/import/m4/mkstemp.m4 b/gdb/gnulib/import/m4/mkstemp.m4
deleted file mode 100644
index 131e4a7b26..0000000000
--- a/gdb/gnulib/import/m4/mkstemp.m4
+++ /dev/null
@@ -1,82 +0,0 @@
-#serial 23
-
-# Copyright (C) 2001, 2003-2007, 2009-2016 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
-# silly limit that it can create no more than 26 files from a given template.
-# Other systems lack mkstemp altogether.
-# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
-# only 32 files per process.
-# On some hosts, mkstemp creates files with mode 0666, which is a security
-# problem and a violation of POSIX 2008.
-# On systems like the above, arrange to use the replacement function.
-AC_DEFUN([gl_FUNC_MKSTEMP],
-[
-  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-
-  AC_CHECK_FUNCS_ONCE([mkstemp])
-  if test $ac_cv_func_mkstemp = yes; then
-    AC_CACHE_CHECK([for working mkstemp],
-      [gl_cv_func_working_mkstemp],
-      [
-        mkdir conftest.mkstemp
-        AC_RUN_IFELSE(
-          [AC_LANG_PROGRAM(
-            [AC_INCLUDES_DEFAULT],
-            [[int result = 0;
-              int i;
-              off_t large = (off_t) 4294967295u;
-              if (large < 0)
-                large = 2147483647;
-              umask (0);
-              for (i = 0; i < 70; i++)
-                {
-                  char templ[] = "conftest.mkstemp/coXXXXXX";
-                  int (*mkstemp_function) (char *) = mkstemp;
-                  int fd = mkstemp_function (templ);
-                  if (fd < 0)
-                    result |= 1;
-                  else
-                    {
-                      struct stat st;
-                      if (lseek (fd, large, SEEK_SET) != large)
-                        result |= 2;
-                      if (fstat (fd, &st) < 0)
-                        result |= 4;
-                      else if (st.st_mode & 0077)
-                        result |= 8;
-                      if (close (fd))
-                        result |= 16;
-                    }
-                }
-              return result;]])],
-          [gl_cv_func_working_mkstemp=yes],
-          [gl_cv_func_working_mkstemp=no],
-          [case "$host_os" in
-                     # Guess yes on glibc systems.
-             *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
-                     # If we don't know, assume the worst.
-             *)      gl_cv_func_working_mkstemp="guessing no" ;;
-           esac
-          ])
-        rm -rf conftest.mkstemp
-      ])
-    case "$gl_cv_func_working_mkstemp" in
-      *yes) ;;
-      *)
-        REPLACE_MKSTEMP=1
-        ;;
-    esac
-  else
-    HAVE_MKSTEMP=0
-  fi
-])
-
-# Prerequisites of lib/mkstemp.c.
-AC_DEFUN([gl_PREREQ_MKSTEMP],
-[
-])
diff --git a/gdb/gnulib/import/mkstemp.c b/gdb/gnulib/import/mkostemp.c
similarity index 79%
rename from gdb/gnulib/import/mkstemp.c
rename to gdb/gnulib/import/mkostemp.c
index 90ed78e49e..31c3e4837f 100644
--- a/gdb/gnulib/import/mkstemp.c
+++ b/gdb/gnulib/import/mkostemp.c
@@ -24,7 +24,7 @@
 #if !_LIBC
 # include "tempname.h"
 # define __gen_tempname gen_tempname
-# ifndef __GT_FILE
+# ifndef __GTFILE
 #  define __GT_FILE GT_FILE
 # endif
 #endif
@@ -38,13 +38,9 @@
 /* Generate a unique temporary file name from XTEMPLATE.
    The last six characters of XTEMPLATE must be "XXXXXX";
    they are replaced with a string that makes the file name unique.
-   Then open the file and return a fd.
-
-   If you are creating temporary files which will later be removed,
-   consider using the clean-temp module, which avoids several pitfalls
-   of using mkstemp directly. */
+   Then open the file and return a fd. */
 int
-mkstemp (char *xtemplate)
+mkostemp (char *xtemplate, int flags)
 {
-  return __gen_tempname (xtemplate, 0, 0, __GT_FILE);
+  return __gen_tempname (xtemplate, 0, flags, __GT_FILE);
 }
diff --git a/gdb/gnulib/import/stdlib.in.h b/gdb/gnulib/import/stdlib.in.h
index db3253bd97..8f803a2ea3 100644
--- a/gdb/gnulib/import/stdlib.in.h
+++ b/gdb/gnulib/import/stdlib.in.h
@@ -87,9 +87,10 @@ struct random_data
 # endif
 #endif
 
-#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
+#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_MKOSTEMP@ || @GNULIB_MKOSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
 /* On Mac OS X 10.3, only <unistd.h> declares mkstemp.  */
 /* On Mac OS X 10.5, only <unistd.h> declares mkstemps.  */
+/* On Mac OS X 10.13, only <unistd.h> declares mkostemp and mkostemps.  */
 /* On Cygwin 1.7.1, only <unistd.h> declares getsubopt.  */
 /* But avoid namespace pollution on glibc systems and native Windows.  */
 # include <unistd.h>
diff --git a/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch b/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch
new file mode 100644
index 0000000000..35f917fac4
--- /dev/null
+++ b/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch
@@ -0,0 +1,38 @@
+From 6954995dd32ea98a1973df31f411f3996bb47dfb Mon Sep 17 00:00:00 2001
+From: Tom Tromey <tom@tromey.com>
+Date: Mon, 1 Oct 2018 14:57:45 -0600
+Subject: [PATCH] mkostemp, mkostemps: Fix compilation error in C++ mode on Mac
+ OS X.
+
+Attempting to use the mkostemp module in gdb caused a build failure
+when using the C++ namespace feature, because mkostemp was not
+declared.  On OS X, mkostemp is declared in unistd.h, so this patch
+extends the existing special case in stdlib.in.h to cover mkostemp and
+mkostemps.
+
+* lib/stdlib.in.h: Include <unistd.h> for mkostemp and mkostemps
+on OS X.
+---
+ ChangeLog       | 6 ++++++
+ lib/stdlib.in.h | 3 ++-
+ 2 files changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/gdb/gnulib/import/stdlib.in.h b/gdb/gnulib/import/stdlib.in.h
+index db3253bd97..8f803a2ea3 100644
+--- a/gdb/gnulib/import/stdlib.in.h
++++ b/gdb/gnulib/import/stdlib.in.h
+@@ -87,9 +87,10 @@ struct random_data
+ # endif
+ #endif
+ 
+-#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
++#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_MKOSTEMP@ || @GNULIB_MKOSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
+ /* On Mac OS X 10.3, only <unistd.h> declares mkstemp.  */
+ /* On Mac OS X 10.5, only <unistd.h> declares mkstemps.  */
++/* On Mac OS X 10.13, only <unistd.h> declares mkostemp and mkostemps.  */
+ /* On Cygwin 1.7.1, only <unistd.h> declares getsubopt.  */
+ /* But avoid namespace pollution on glibc systems and native Windows.  */
+ # include <unistd.h>
+-- 
+2.19.0
+
diff --git a/gdb/gnulib/update-gnulib.sh b/gdb/gnulib/update-gnulib.sh
index 09933ab9fe..5129450577 100755
--- a/gdb/gnulib/update-gnulib.sh
+++ b/gdb/gnulib/update-gnulib.sh
@@ -46,7 +46,7 @@ IMPORTED_GNULIB_MODULES="\
     memchr \
     memmem \
     mkdir \
-    mkstemp \
+    mkostemp \
     pathmax \
     rawmemchr \
     readlink \
@@ -169,6 +169,7 @@ apply_patches ()
 }
 
 apply_patches "patches/0001-Fix-PR-gdb-23558-Use-system-s-getcwd-when-cross-comp.patch"
+apply_patches "patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch"
 
 # Regenerate all necessary files...
 aclocal -Iimport/m4 &&
diff --git a/gdb/unittests/scoped_fd-selftests.c b/gdb/unittests/scoped_fd-selftests.c
index d5c0d30abb..fb6a0d675d 100644
--- a/gdb/unittests/scoped_fd-selftests.c
+++ b/gdb/unittests/scoped_fd-selftests.c
@@ -19,6 +19,7 @@
 
 #include "defs.h"
 
+#include "common/filestuff.h"
 #include "common/scoped_fd.h"
 #include "config.h"
 #include "selftest.h"
@@ -31,7 +32,7 @@ static void
 test_destroy ()
 {
   char filename[] = "scoped_fd-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   unlink (filename);
@@ -50,7 +51,7 @@ static void
 test_release ()
 {
   char filename[] = "scoped_fd-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   unlink (filename);
diff --git a/gdb/unittests/scoped_mmap-selftests.c b/gdb/unittests/scoped_mmap-selftests.c
index b181e02f50..75d1aeda8a 100644
--- a/gdb/unittests/scoped_mmap-selftests.c
+++ b/gdb/unittests/scoped_mmap-selftests.c
@@ -19,6 +19,7 @@
 
 #include "defs.h"
 
+#include "common/filestuff.h"
 #include "common/scoped_mmap.h"
 #include "config.h"
 
@@ -88,7 +89,7 @@ static void
 test_normal ()
 {
   char filename[] = "scoped_mmapped_file-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   SELF_CHECK (write (fd, "Hello!", 7) == 7);
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 1/6] Unify shell-finding logic
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 5/6] Do not reopen temporary files Tom Tromey
                   ` (3 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

I noticed several places in gdb that were using getenv("SHELL") and
then falling back to "/bin/sh" if it returned NULL.  This unifies
these into a single function.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	* procfs.c (procfs_target::create_inferior): Use get_shell.
	* cli/cli-cmds.c (shell_escape): Use get_shell.
	* windows-nat.c (windows_nat_target::create_inferior): Use
	get_shell.
	* common/pathstuff.c (get_shell): New function.
	* nat/fork-inferior.c (SHELL_FILE, get_startup_shell): Remove.
	(fork_inferior): Use get_shell.
	* common/pathstuff.h (get_shell): Declare.
---
 gdb/ChangeLog           | 11 +++++++++++
 gdb/cli/cli-cmds.c      |  6 ++----
 gdb/common/pathstuff.c  | 12 ++++++++++++
 gdb/common/pathstuff.h  |  4 ++++
 gdb/nat/fork-inferior.c | 21 ++-------------------
 gdb/procfs.c            |  4 ++--
 gdb/windows-nat.c       |  5 ++---
 7 files changed, 35 insertions(+), 28 deletions(-)

diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c
index c60e5efd0c..37988dd5d7 100644
--- a/gdb/cli/cli-cmds.c
+++ b/gdb/cli/cli-cmds.c
@@ -50,6 +50,7 @@
 #include "cli/cli-utils.h"
 
 #include "extension.h"
+#include "common/pathstuff.h"
 
 #ifdef TUI
 #include "tui/tui.h"	/* For tui_active et.al.  */
@@ -726,13 +727,10 @@ shell_escape (const char *arg, int from_tty)
 
   if ((pid = vfork ()) == 0)
     {
-      const char *p, *user_shell;
+      const char *p, *user_shell = get_shell ();
 
       close_most_fds ();
 
-      if ((user_shell = getenv ("SHELL")) == NULL)
-	user_shell = "/bin/sh";
-
       /* Get the name of the shell for arg0.  */
       p = lbasename (user_shell);
 
diff --git a/gdb/common/pathstuff.c b/gdb/common/pathstuff.c
index 82905c9e68..6d8e53f4e1 100644
--- a/gdb/common/pathstuff.c
+++ b/gdb/common/pathstuff.c
@@ -190,3 +190,15 @@ get_standard_cache_dir ()
 
   return {};
 }
+
+/* See common/pathstuff.h.  */
+
+const char *
+get_shell ()
+{
+  const char *ret = getenv ("SHELL");
+  if (ret == NULL)
+    ret = "/bin/sh";
+
+  return ret;
+}
diff --git a/gdb/common/pathstuff.h b/gdb/common/pathstuff.h
index a43b963651..40fbda8d85 100644
--- a/gdb/common/pathstuff.h
+++ b/gdb/common/pathstuff.h
@@ -64,4 +64,8 @@ extern bool contains_dir_separator (const char *path);
 
 extern std::string get_standard_cache_dir ();
 
+/* Return the file name of the user's shell.  */
+
+extern const char *get_shell ();
+
 #endif /* PATHSTUFF_H */
diff --git a/gdb/nat/fork-inferior.c b/gdb/nat/fork-inferior.c
index 40cd05a0f8..f1032b43c9 100644
--- a/gdb/nat/fork-inferior.c
+++ b/gdb/nat/fork-inferior.c
@@ -24,16 +24,13 @@
 #include "target/target.h"
 #include "common-inferior.h"
 #include "common-gdbthread.h"
+#include "common/pathstuff.h"
 #include "signals-state-save-restore.h"
 #include "gdb_tilde_expand.h"
 #include <vector>
 
 extern char **environ;
 
-/* Default shell file to be used if 'startup-with-shell' is set but
-   $SHELL is not.  */
-#define SHELL_FILE "/bin/sh"
-
 /* Build the argument vector for execv(3).  */
 
 class execv_argv
@@ -265,20 +262,6 @@ execv_argv::init_for_shell (const char *exec_file,
   m_argv.push_back (NULL);
 }
 
-/* Return the shell that must be used to startup the inferior.  The
-   first attempt is the environment variable SHELL; if it is not set,
-   then we default to SHELL_FILE.  */
-
-static const char *
-get_startup_shell ()
-{
-  const char *ret = getenv ("SHELL");
-  if (ret == NULL)
-    ret = SHELL_FILE;
-
-  return ret;
-}
-
 /* See nat/fork-inferior.h.  */
 
 pid_t
@@ -316,7 +299,7 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
 
       /* Figure out what shell to start up the user program under.  */
       if (shell_file == NULL)
-	shell_file = get_startup_shell ();
+	shell_file = get_shell ();
 
       gdb_assert (shell_file != NULL);
     }
diff --git a/gdb/procfs.c b/gdb/procfs.c
index 6ffe569e69..ca381a71ae 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -3035,11 +3035,11 @@ procfs_target::create_inferior (const char *exec_file,
 				const std::string &allargs,
 				char **env, int from_tty)
 {
-  char *shell_file = getenv ("SHELL");
+  const char *shell_file = get_shell ();
   char *tryname;
   int pid;
 
-  if (shell_file != NULL && strchr (shell_file, '/') == NULL)
+  if (strchr (shell_file, '/') == NULL)
     {
 
       /* We will be looking down the PATH to find shell_file.  If we
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 0047a26418..8292cf4212 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -68,6 +68,7 @@
 #include "complaints.h"
 #include "inf-child.h"
 #include "gdb_tilde_expand.h"
+#include "common/pathstuff.h"
 
 #define AdjustTokenPrivileges		dyn_AdjustTokenPrivileges
 #define DebugActiveProcessStop		dyn_DebugActiveProcessStop
@@ -2578,9 +2579,7 @@ windows_nat_target::create_inferior (const char *exec_file,
     }
   else
     {
-      sh = getenv ("SHELL");
-      if (!sh)
-	sh = "/bin/sh";
+      sh = get_shell ();
       if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
       	error (_("Error starting executable via shell: %d"), errno);
 #ifdef __USEWIDE
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 5/6] Do not reopen temporary files
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 1/6] Unify shell-finding logic Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 6/6] Cache a copy of the user's shell on macOS Tom Tromey
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

The current callers of mkostemp close the file descriptor and then
re-open it with fopen.  It seemed better to me to continue to use the
already-opened file descriptor, so this patch rearranges the code a
little in order to do so.  It takes care to ensure that the files are
only unlinked after the file descriptor in question is closed, as
before.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	* unittests/scoped_fd-selftests.c (test_to_file): New function.
	(run_tests): Call test_to_file.
	* dwarf-index-write.c (write_psymtabs_to_index): Do not reopen
	temporary files.
	* common/scoped_fd.h (scoped_fd::to_file): New method.
---
 gdb/ChangeLog                       |  8 +++++
 gdb/common/scoped_fd.h              | 13 +++++++
 gdb/dwarf-index-write.c             | 56 ++++++++++++++---------------
 gdb/unittests/scoped_fd-selftests.c | 17 +++++++++
 4 files changed, 65 insertions(+), 29 deletions(-)

diff --git a/gdb/common/scoped_fd.h b/gdb/common/scoped_fd.h
index c2125bd1af..d20e18a2c0 100644
--- a/gdb/common/scoped_fd.h
+++ b/gdb/common/scoped_fd.h
@@ -21,6 +21,7 @@
 #define SCOPED_FD_H
 
 #include <unistd.h>
+#include "filestuff.h"
 
 /* A smart-pointer-like class to automatically close a file descriptor.  */
 
@@ -43,6 +44,18 @@ public:
     return fd;
   }
 
+  /* Like release, but return a gdb_file_up that owns the file
+     descriptor.  On success, this scoped_fd will be released.  On
+     failure, return NULL and leave this scoped_fd in possession of
+     the fd.  */
+  gdb_file_up to_file (const char *mode) noexcept
+  {
+    gdb_file_up result (fdopen (m_fd, mode));
+    if (result != nullptr)
+      m_fd = -1;
+    return result;
+  }
+
   int get () const noexcept
   {
     return m_fd;
diff --git a/gdb/dwarf-index-write.c b/gdb/dwarf-index-write.c
index 3032798426..6ba1f87623 100644
--- a/gdb/dwarf-index-write.c
+++ b/gdb/dwarf-index-write.c
@@ -1565,23 +1565,21 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
 			   ? INDEX5_SUFFIX : INDEX4_SUFFIX));
   gdb::char_vector filename_temp = make_temp_filename (filename);
 
-  gdb::optional<scoped_fd> out_file_fd
-    (gdb::in_place, gdb_mkostemp_cloexec (filename_temp.data (), O_BINARY));
-  if (out_file_fd->get () == -1)
+  /* Order matters here; we want FILE to be closed before
+     FILENAME_TEMP is unlinked, because on MS-Windows one cannot
+     delete a file that is still open.  So, we wrap the unlinker in an
+     optional and emplace it once we know the file name.  */
+  gdb::optional<gdb::unlinker> unlink_file;
+  scoped_fd out_file_fd (gdb_mkostemp_cloexec (filename_temp.data (),
+					       O_BINARY));
+  if (out_file_fd.get () == -1)
     perror_with_name (("mkstemp"));
 
-  FILE *out_file = gdb_fopen_cloexec (filename_temp.data (), "wb").release ();
+  gdb_file_up out_file = out_file_fd.to_file ("wb");
   if (out_file == nullptr)
     error (_("Can't open `%s' for writing"), filename_temp.data ());
 
-  /* Order matters here; we want FILE to be closed before FILENAME_TEMP is
-     unlinked, because on MS-Windows one cannot delete a file that is
-     still open.  (Don't call anything here that might throw until
-     file_closer is created.)  We don't need OUT_FILE_FD anymore, so we might
-     as well close it now.  */
-  out_file_fd.reset ();
-  gdb::unlinker unlink_file (filename_temp.data ());
-  gdb_file_up close_out_file (out_file);
+  unlink_file.emplace (filename_temp.data ());
 
   if (index_kind == dw_index_kind::DEBUG_NAMES)
     {
@@ -1589,45 +1587,45 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
 				+ basename + DEBUG_STR_SUFFIX);
       gdb::char_vector filename_str_temp = make_temp_filename (filename_str);
 
-      gdb::optional<scoped_fd> out_file_str_fd
-	(gdb::in_place, gdb_mkostemp_cloexec (filename_str_temp.data (),
-					      O_BINARY));
-      if (out_file_str_fd->get () == -1)
+      /* As above, arrange to unlink the file only after the file
+	 descriptor has been closed.  */
+      gdb::optional<gdb::unlinker> unlink_file_str;
+      scoped_fd out_file_str_fd
+	(gdb_mkostemp_cloexec (filename_str_temp.data (), O_BINARY));
+      if (out_file_str_fd.get () == -1)
         perror_with_name (("mkstemp"));
 
-      FILE *out_file_str
-	= gdb_fopen_cloexec (filename_str_temp.data (), "wb").release ();
+      gdb_file_up out_file_str = out_file_str_fd.to_file ("wb");
       if (out_file_str == nullptr)
 	error (_("Can't open `%s' for writing"), filename_str_temp.data ());
 
-      out_file_str_fd.reset ();
-      gdb::unlinker unlink_file_str (filename_str_temp.data ());
-      gdb_file_up close_out_file_str (out_file_str);
+      unlink_file_str.emplace (filename_str_temp.data ());
 
       const size_t total_len
-	= write_debug_names (dwarf2_per_objfile, out_file, out_file_str);
-      assert_file_size (out_file, filename_temp.data (), total_len);
+	= write_debug_names (dwarf2_per_objfile, out_file.get (),
+			     out_file_str.get ());
+      assert_file_size (out_file.get (), filename_temp.data (), total_len);
 
       /* We want to keep the file .debug_str file too.  */
-      unlink_file_str.keep ();
+      unlink_file_str->keep ();
 
       /* Close and move the str file in place.  */
-      close_out_file_str.reset ();
+      out_file_str.reset ();
       if (rename (filename_str_temp.data (), filename_str.c_str ()) != 0)
 	perror_with_name (("rename"));
     }
   else
     {
       const size_t total_len
-	= write_gdbindex (dwarf2_per_objfile, out_file);
-      assert_file_size (out_file, filename_temp.data (), total_len);
+	= write_gdbindex (dwarf2_per_objfile, out_file.get ());
+      assert_file_size (out_file.get (), filename_temp.data (), total_len);
     }
 
   /* We want to keep the file.  */
-  unlink_file.keep ();
+  unlink_file->keep ();
 
   /* Close and move the file in place.  */
-  close_out_file.reset ();
+  out_file.reset ();
   if (rename (filename_temp.data (), filename.c_str ()) != 0)
 	perror_with_name (("rename"));
 }
diff --git a/gdb/unittests/scoped_fd-selftests.c b/gdb/unittests/scoped_fd-selftests.c
index fb6a0d675d..6a9c727477 100644
--- a/gdb/unittests/scoped_fd-selftests.c
+++ b/gdb/unittests/scoped_fd-selftests.c
@@ -65,12 +65,29 @@ test_release ()
   SELF_CHECK (close (fd) == 0 || errno != EBADF);
 }
 
+/* Test that the file descriptor can be converted to a FILE *.  */
+static void
+test_to_file ()
+{
+  char filename[] = "scoped_fd-selftest-XXXXXX";
+
+  ::scoped_fd sfd (gdb_mkostemp_cloexec (filename));
+  SELF_CHECK (sfd.get () >= 0);
+
+  unlink (filename);
+  
+  gdb_file_up file = sfd.to_file ("rw");
+  SELF_CHECK (file != nullptr);
+  SELF_CHECK (sfd.get () == -1);
+}
+
 /* Run selftests.  */
 static void
 run_tests ()
 {
   test_destroy ();
   test_release ();
+  test_to_file ();
 }
 
 } /* namespace scoped_fd */
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 6/6] Cache a copy of the user's shell on macOS
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
                   ` (2 preceding siblings ...)
  2018-10-03 21:02 ` [PATCH v2 5/6] Do not reopen temporary files Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 2/6] Move make_temp_filename to common/pathstuff.c Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 3/6] Move mkdir_recursive to common/filestuff.c Tom Tromey
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

Recent versions of macOS have a feature called System Integrity
Protection.  Among other things, This feature prevents ptrace from
tracing certain programs --- for example, the programs in /bin, which
includes typical shells.

This means that startup-with-shell does not work properly.  This is PR
cli/23364.  Currently there is a workaround in gdb to disable
startup-with-shell when this feature might be in use.

This patch changes gdb to be a bit more precise about when
startup-with-shell will not work, by checking whether the shell
executable is restricted.

If the shell is restricted, then this patch will also cause gdb to
cache a copy of the shell in the gdb cache directory, and then reset
the SHELL environment variable to point to this copy.  This lets
startup-with-shell work again.

Tested on High Sierra by trying to start a program using redirection,
and by running startup-with-shell.exp.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	PR cli/23364:
	* darwin-nat.c (copied_shell): New global.
	(may_have_sip): Rename from should_disable_startup_with_shell.
	(copy_shell_to_cache, maybe_cache_shell): New functions.
	(darwin_nat_target::create_inferior): Update.  Use
	copied_shell.
---
 gdb/ChangeLog    |   9 +++
 gdb/darwin-nat.c | 151 ++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 153 insertions(+), 7 deletions(-)

diff --git a/gdb/darwin-nat.c b/gdb/darwin-nat.c
index ecc7635d04..1c6f8e061b 100644
--- a/gdb/darwin-nat.c
+++ b/gdb/darwin-nat.c
@@ -38,6 +38,7 @@
 #include "bfd.h"
 #include "bfd/mach-o.h"
 
+#include <copyfile.h>
 #include <sys/ptrace.h>
 #include <sys/signal.h>
 #include <setjmp.h>
@@ -61,7 +62,11 @@
 #include <mach/port.h>
 
 #include "darwin-nat.h"
+#include "filenames.h"
 #include "common/filestuff.h"
+#include "common/gdb_unlinker.h"
+#include "common/pathstuff.h"
+#include "common/scoped_fd.h"
 #include "nat/fork-inferior.h"
 
 /* Quick overview.
@@ -119,6 +124,10 @@ static int enable_mach_exceptions;
 /* Inferior that should report a fake stop event.  */
 static struct inferior *darwin_inf_fake_stop;
 
+/* If non-NULL, the shell we actually invoke.  See maybe_cache_shell
+   for details.  */
+static const char *copied_shell;
+
 #define PAGE_TRUNC(x) ((x) & ~(mach_page_size - 1))
 #define PAGE_ROUND(x) PAGE_TRUNC((x) + mach_page_size - 1)
 
@@ -1833,10 +1842,11 @@ darwin_execvp (const char *file, char * const argv[], char * const env[])
   posix_spawnp (NULL, argv[0], NULL, &attr, argv, env);
 }
 
-/* Read kernel version, and return TRUE on Sierra or later.  */
+/* Read kernel version, and return TRUE if this host may have System
+   Integrity Protection (Sierra or later).  */
 
 static bool
-should_disable_startup_with_shell ()
+may_have_sip ()
 {
   char str[16];
   size_t sz = sizeof (str);
@@ -1852,6 +1862,131 @@ should_disable_startup_with_shell ()
   return false;
 }
 
+/* A helper for maybe_cache_shell.  This copies the shell to the
+   cache.  It will throw an exception on any failure.  */
+
+static void
+copy_shell_to_cache (const char *shell, const std::string &new_name)
+{
+  scoped_fd from_fd (gdb_open_cloexec (shell, O_RDONLY, 0));
+  if (from_fd.get () < 0)
+    error (_("Could not open shell (%s) for reading: %s"),
+	   shell, safe_strerror (errno));
+
+  std::string new_dir = ldirname (new_name.c_str ());
+  if (!mkdir_recursive (new_dir.c_str ()))
+    error (_("Could not make cache directory \"%s\": %s"),
+	   new_dir.c_str (), safe_strerror (errno));
+
+  gdb::char_vector temp_name = make_temp_filename (new_name);
+  scoped_fd to_fd (gdb_mkostemp_cloexec (&temp_name[0]));
+  gdb::unlinker unlink_file_on_error (temp_name.data ());
+
+  if (to_fd.get () < 0)
+    error (_("Could not open temporary file \"%s\" for writing: %s"),
+	   temp_name.data (), safe_strerror (errno));
+
+  if (fcopyfile (from_fd.get (), to_fd.get (), nullptr,
+		 COPYFILE_STAT | COPYFILE_DATA) != 0)
+    error (_("Could not copy shell to cache as \"%s\": %s"),
+	   temp_name.data (), safe_strerror (errno));
+
+  /* Be sure that the caching is atomic so that we don't get bad
+     results from multiple copies of gdb running at the same time.  */
+  if (rename (temp_name.data (), new_name.c_str ()) != 0)
+    error (_("Could not rename shell cache file to \"%s\": %s"),
+	   new_name.c_str (), safe_strerror (errno));
+
+  unlink_file_on_error.keep ();
+}
+
+/* If $SHELL is restricted, try to cache a copy.  Starting with El
+   Capitan, macOS introduced System Integrity Protection.  Among other
+   things, this prevents certain executables from being ptrace'd.  In
+   particular, executables in /bin, like most shells, are affected.
+   To work around this, while preserving command-line glob expansion
+   and redirections, gdb will cache a copy of the shell.  Return true
+   if all is well -- either the shell is not subject to SIP or it has
+   been successfully cached.  Returns false if something failed.  */
+
+static bool
+maybe_cache_shell ()
+{
+  /* SF_RESTRICTED is defined in sys/stat.h and lets us determine if a
+     given file is subject to SIP.  */
+#ifdef SF_RESTRICTED
+
+  /* If a check fails we want to revert -- maybe the user deleted the
+     cache while gdb was running, or something like that.  */
+  copied_shell = nullptr;
+
+  const char *shell = get_shell ();
+  if (!IS_ABSOLUTE_PATH (shell))
+    {
+      warning (_("This version of macOS has System Integrity Protection.\n\
+Normally gdb would try to work around this by caching a copy of your shell,\n\
+but because your shell (%s) is not an absolute path, this is being skipped."),
+	       shell);
+      return false;
+    }
+
+  struct stat sb;
+  if (stat (shell, &sb) < 0)
+    {
+      warning (_("This version of macOS has System Integrity Protection.\n\
+Normally gdb would try to work around this by caching a copy of your shell,\n\
+but because gdb could not stat your shell (%s), this is being skipped.\n\
+The error was: %s"),
+	       shell, safe_strerror (errno));
+      return false;
+    }
+
+  if ((sb.st_flags & SF_RESTRICTED) == 0)
+    return true;
+
+  /* Put the copy somewhere like ~/Library/Caches/gdb/bin/sh.  */
+  std::string new_name = get_standard_cache_dir ();
+  if (!IS_DIR_SEPARATOR (new_name.back ()) && !IS_ABSOLUTE_PATH (shell))
+    new_name.push_back ('/');
+  new_name.append (shell);
+
+  /* Maybe it was cached by some earlier gdb.  */
+  if (stat (new_name.c_str (), &sb) != 0 || !S_ISREG (sb.st_mode))
+    {
+      TRY
+	{
+	  copy_shell_to_cache (shell, new_name);
+	}
+      CATCH (ex, RETURN_MASK_ERROR)
+	{
+	  warning (_("This version of macOS has System Integrity Protection.\n\
+Because `startup-with-shell' is enabled, gdb tried to work around SIP by\n\
+caching a copy of your shell.  However, this failed:\n\
+%s\n\
+If you correct the problem, gdb will automatically try again the next time\n\
+you \"run\".  To prevent these attempts, you can use:\n\
+    set startup-with-shell off"),
+		   ex.message);
+	  return false;
+	}
+      END_CATCH
+
+      printf_filtered (_("Note: this version of macOS has System Integrity Protection.\n\
+Because `startup-with-shell' is enabled, gdb has worked around this by\n\
+caching a copy of your shell.  The shell used by \"run\" is now:\n\
+    %s\n"),
+		       new_name.c_str ());
+    }
+
+  /* We need to make sure that the new name has the correct lifetime.  */
+  static std::string saved_shell = std::move (new_name);
+  copied_shell = saved_shell.c_str ();
+
+#endif /* SF_RESTRICTED */
+
+  return true;
+}
+
 void
 darwin_nat_target::create_inferior (const char *exec_file,
 				    const std::string &allargs,
@@ -1859,16 +1994,18 @@ darwin_nat_target::create_inferior (const char *exec_file,
 {
   gdb::optional<scoped_restore_tmpl<int>> restore_startup_with_shell;
 
-  if (startup_with_shell && should_disable_startup_with_shell ())
+  if (startup_with_shell && may_have_sip ())
     {
-      warning (_("startup-with-shell not supported on this macOS version,"
-	         " disabling it."));
-      restore_startup_with_shell.emplace (&startup_with_shell, 0);
+      if (!maybe_cache_shell ())
+	{
+	  warning (_("startup-with-shell is now temporarily disabled"));
+	  restore_startup_with_shell.emplace (&startup_with_shell, 0);
+	}
     }
 
   /* Do the hard work.  */
   fork_inferior (exec_file, allargs, env, darwin_ptrace_me,
-		 darwin_ptrace_him, darwin_pre_ptrace, NULL,
+		 darwin_ptrace_him, darwin_pre_ptrace, copied_shell,
 		 darwin_execvp);
 }
 \f
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 2/6] Move make_temp_filename to common/pathstuff.c
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
                   ` (3 preceding siblings ...)
  2018-10-03 21:02 ` [PATCH v2 6/6] Cache a copy of the user's shell on macOS Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  2018-10-03 21:02 ` [PATCH v2 3/6] Move mkdir_recursive to common/filestuff.c Tom Tromey
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

Currently make_temp_filename is a function local to
write_psymtabs_to_index.  This patch moves it to pathstuff.c so that
it can be used from other places in gdb.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	* dwarf-index-write.c (write_psymtabs_to_index): Move
	make_temp_filename to common/pathstuff.c.
	* common/pathstuff.h (make_temp_filename): Declare.
	* common/pathstuff.c (make_temp_filename): New function, moved
	from dwarf-index-write.c.
---
 gdb/ChangeLog           |  8 ++++++++
 gdb/common/pathstuff.c  | 11 +++++++++++
 gdb/common/pathstuff.h  |  7 +++++++
 gdb/dwarf-index-write.c | 11 +----------
 4 files changed, 27 insertions(+), 10 deletions(-)

diff --git a/gdb/common/pathstuff.c b/gdb/common/pathstuff.c
index 6d8e53f4e1..48ff861eda 100644
--- a/gdb/common/pathstuff.c
+++ b/gdb/common/pathstuff.c
@@ -202,3 +202,14 @@ get_shell ()
 
   return ret;
 }
+
+/* See common/pathstuff.h.  */
+
+gdb::char_vector
+make_temp_filename (const std::string &f)
+{
+  gdb::char_vector filename_temp (f.length () + 8);
+  strcpy (filename_temp.data (), f.c_str ());
+  strcat (filename_temp.data () + f.size (), "-XXXXXX");
+  return filename_temp;
+}
diff --git a/gdb/common/pathstuff.h b/gdb/common/pathstuff.h
index 40fbda8d85..14fab04805 100644
--- a/gdb/common/pathstuff.h
+++ b/gdb/common/pathstuff.h
@@ -20,6 +20,8 @@
 #ifndef PATHSTUFF_H
 #define PATHSTUFF_H
 
+#include "common/byte-vector.h"
+
 /* Path utilities.  */
 
 /* Return the real path of FILENAME, expanding all the symbolic links.
@@ -68,4 +70,9 @@ extern std::string get_standard_cache_dir ();
 
 extern const char *get_shell ();
 
+/* Make a filename suitable to pass to mkstemp based on F (e.g.
+   /tmp/foo -> /tmp/foo-XXXXXX).  */
+
+extern gdb::char_vector make_temp_filename (const std::string &f);
+
 #endif /* PATHSTUFF_H */
diff --git a/gdb/dwarf-index-write.c b/gdb/dwarf-index-write.c
index 252032161f..dc8660e734 100644
--- a/gdb/dwarf-index-write.c
+++ b/gdb/dwarf-index-write.c
@@ -24,6 +24,7 @@
 #include "common/byte-vector.h"
 #include "common/filestuff.h"
 #include "common/gdb_unlinker.h"
+#include "common/pathstuff.h"
 #include "common/scoped_fd.h"
 #include "complaints.h"
 #include "dwarf-index-common.h"
@@ -1559,16 +1560,6 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
   if (stat (objfile_name (objfile), &st) < 0)
     perror_with_name (objfile_name (objfile));
 
-  /* Make a filename suitable to pass to mkstemp based on F (e.g.
-     /tmp/foo -> /tmp/foo-XXXXXX).  */
-  auto make_temp_filename = [] (const std::string &f) -> gdb::char_vector
-    {
-      gdb::char_vector filename_temp (f.length () + 8);
-      strcpy (filename_temp.data (), f.c_str ());
-      strcat (filename_temp.data () + f.size (), "-XXXXXX");
-      return filename_temp;
-    };
-
   std::string filename (std::string (dir) + SLASH_STRING + basename
 			+ (index_kind == dw_index_kind::DEBUG_NAMES
 			   ? INDEX5_SUFFIX : INDEX4_SUFFIX));
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 3/6] Move mkdir_recursive to common/filestuff.c
  2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
                   ` (4 preceding siblings ...)
  2018-10-03 21:02 ` [PATCH v2 2/6] Move make_temp_filename to common/pathstuff.c Tom Tromey
@ 2018-10-03 21:02 ` Tom Tromey
  5 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-03 21:02 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

This moves mkdir_recursive from dwarf-index-cache.c to
common/filestuff.c, and also changes it to return a boolean that says
whether or not it worked.

gdb/ChangeLog
2018-10-03  Tom Tromey  <tom@tromey.com>

	* unittests/mkdir-recursive-selftests.c: New file.
	* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
	unittests/mkdir-recursive-selftests.c.
	* dwarf-index-cache.c (mkdir_recursive): Move to
	common/filestuff.c.
	(index_cache::store): Check return value of mkdir_recursive.
	(create_dir_and_check, test_mkdir_recursive): Move to new file.
	(_initialize_index_cache): Don't register test.
	* common/filestuff.h (mkdir_recursive): Declare.
	* common/filestuff.c (mkdir_recursive): Move from
	dwarf-index-cache.c.  Return bool.
---
 gdb/ChangeLog                             |  14 +++
 gdb/Makefile.in                           |   1 +
 gdb/common/filestuff.c                    |  45 +++++++++
 gdb/common/filestuff.h                    |  10 ++
 gdb/dwarf-index-cache.c                   | 114 ++--------------------
 gdb/unittests/mkdir-recursive-selftests.c |  89 +++++++++++++++++
 6 files changed, 165 insertions(+), 108 deletions(-)
 create mode 100644 gdb/unittests/mkdir-recursive-selftests.c

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 8d780ac758..62d46323e4 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -419,6 +419,7 @@ SUBDIR_UNITTESTS_SRCS = \
 	unittests/optional-selftests.c \
 	unittests/parse-connection-spec-selftests.c \
 	unittests/ptid-selftests.c \
+	unittests/mkdir-recursive-selftests.c \
 	unittests/rsp-low-selftests.c \
 	unittests/scoped_fd-selftests.c \
 	unittests/scoped_mmap-selftests.c \
diff --git a/gdb/common/filestuff.c b/gdb/common/filestuff.c
index fa10165a7c..763def7643 100644
--- a/gdb/common/filestuff.c
+++ b/gdb/common/filestuff.c
@@ -448,3 +448,48 @@ is_regular_file (const char *name, int *errno_ptr)
     *errno_ptr = EINVAL;
   return false;
 }
+
+/* See common/filestuff.h.  */
+
+bool
+mkdir_recursive (const char *dir)
+{
+  gdb::unique_xmalloc_ptr<char> holder (xstrdup (dir));
+  char * const start = holder.get ();
+  char *component_start = start;
+  char *component_end = start;
+
+  while (1)
+    {
+      /* Find the beginning of the next component.  */
+      while (*component_start == '/')
+	component_start++;
+
+      /* Are we done?  */
+      if (*component_start == '\0')
+	return true;
+
+      /* Find the slash or null-terminator after this component.  */
+      component_end = component_start;
+      while (*component_end != '/' && *component_end != '\0')
+	component_end++;
+
+      /* Temporarily replace the slash with a null terminator, so we can create
+         the directory up to this component.  */
+      char saved_char = *component_end;
+      *component_end = '\0';
+
+      /* If we get EEXIST and the existing path is a directory, then we're
+         happy.  If it exists, but it's a regular file and this is not the last
+         component, we'll fail at the next component.  If this is the last
+         component, the caller will fail with ENOTDIR when trying to
+         open/create a file under that path.  */
+      if (mkdir (start, 0700) != 0)
+	if (errno != EEXIST)
+	  return false;
+
+      /* Restore the overwritten char.  */
+      *component_end = saved_char;
+      component_start = component_end;
+    }
+}
diff --git a/gdb/common/filestuff.h b/gdb/common/filestuff.h
index e9328f5358..ecfc18d600 100644
--- a/gdb/common/filestuff.h
+++ b/gdb/common/filestuff.h
@@ -122,4 +122,14 @@ typedef std::unique_ptr<DIR, gdb_dir_deleter> gdb_dir_up;
    we're expecting a regular file.  */
 extern bool is_regular_file (const char *name, int *errno_ptr);
 
+
+/* A cheap (as in low-quality) recursive mkdir.  Try to create all the
+   parents directories up to DIR and DIR itself.  Stop if we hit an
+   error along the way.  There is no attempt to remove created
+   directories in case of failure.
+
+   Returns false on failure and sets errno.  */
+
+extern bool mkdir_recursive (const char *dir);
+
 #endif /* FILESTUFF_H */
diff --git a/gdb/dwarf-index-cache.c b/gdb/dwarf-index-cache.c
index 966630b60c..bac98f9db8 100644
--- a/gdb/dwarf-index-cache.c
+++ b/gdb/dwarf-index-cache.c
@@ -45,53 +45,6 @@ index_cache global_index_cache;
 static cmd_list_element *set_index_cache_prefix_list;
 static cmd_list_element *show_index_cache_prefix_list;
 
-/* A cheap (as in low-quality) recursive mkdir.  Try to create all the parents
-   directories up to DIR and DIR itself.  Stop if we hit an error along the way.
-   There is no attempt to remove created directories in case of failure.  */
-
-static void
-mkdir_recursive (const char *dir)
-{
-  gdb::unique_xmalloc_ptr<char> holder (xstrdup (dir));
-  char * const start = holder.get ();
-  char *component_start = start;
-  char *component_end = start;
-
-  while (1)
-    {
-      /* Find the beginning of the next component.  */
-      while (*component_start == '/')
-	component_start++;
-
-      /* Are we done?  */
-      if (*component_start == '\0')
-	return;
-
-      /* Find the slash or null-terminator after this component.  */
-      component_end = component_start;
-      while (*component_end != '/' && *component_end != '\0')
-	component_end++;
-
-      /* Temporarily replace the slash with a null terminator, so we can create
-         the directory up to this component.  */
-      char saved_char = *component_end;
-      *component_end = '\0';
-
-      /* If we get EEXIST and the existing path is a directory, then we're
-         happy.  If it exists, but it's a regular file and this is not the last
-         component, we'll fail at the next component.  If this is the last
-         component, the caller will fail with ENOTDIR when trying to
-         open/create a file under that path.  */
-      if (mkdir (start, 0700) != 0)
-	if (errno != EEXIST)
-	  return;
-
-      /* Restore the overwritten char.  */
-      *component_end = saved_char;
-      component_start = component_end;
-    }
-}
-
 /* Default destructor of index_cache_resource.  */
 index_cache_resource::~index_cache_resource () = default;
 
@@ -160,7 +113,12 @@ index_cache::store (struct dwarf2_per_objfile *dwarf2_per_objfile)
   TRY
     {
       /* Try to create the containing directory.  */
-      mkdir_recursive (m_dir.c_str ());
+      if (!mkdir_recursive (m_dir.c_str ()))
+	{
+	  warning (_("index cache: could not make cache directory: %s\n"),
+		   safe_strerror (errno));
+	  return;
+	}
 
       if (debug_index_cache)
         printf_unfiltered ("index cache: writing index cache for objfile %s\n",
@@ -346,62 +304,6 @@ show_index_cache_stats_command (const char *arg, int from_tty)
 		     indent, global_index_cache.n_misses ());
 }
 
-#if GDB_SELF_TEST && defined (HAVE_MKDTEMP)
-namespace selftests
-{
-
-/* Try to create DIR using mkdir_recursive and make sure it exists.  */
-
-static bool
-create_dir_and_check (const char *dir)
-{
-  mkdir_recursive (dir);
-
-  struct stat st;
-  if (stat (dir, &st) != 0)
-    perror_with_name (("stat"));
-
-  return (st.st_mode & S_IFDIR) != 0;
-}
-
-/* Test mkdir_recursive.  */
-
-static void
-test_mkdir_recursive ()
-{
-  char base[] = "/tmp/gdb-selftests-XXXXXX";
-
-  if (mkdtemp (base) == NULL)
-    perror_with_name (("mkdtemp"));
-
-  /* Try not to leave leftover directories.  */
-  struct cleanup_dirs {
-    cleanup_dirs (const char *base)
-      : m_base (base)
-    {}
-
-    ~cleanup_dirs () {
-      rmdir (string_printf ("%s/a/b/c/d/e", m_base).c_str ());
-      rmdir (string_printf ("%s/a/b/c/d", m_base).c_str ());
-      rmdir (string_printf ("%s/a/b/c", m_base).c_str ());
-      rmdir (string_printf ("%s/a/b", m_base).c_str ());
-      rmdir (string_printf ("%s/a", m_base).c_str ());
-      rmdir (m_base);
-    }
-
-  private:
-    const char *m_base;
-  } cleanup_dirs (base);
-
-  std::string dir = string_printf ("%s/a/b", base);
-  SELF_CHECK (create_dir_and_check (dir.c_str ()));
-
-  dir = string_printf ("%s/a/b/c//d/e/", base);
-  SELF_CHECK (create_dir_and_check (dir.c_str ()));
-}
-}
-#endif /*  GDB_SELF_TEST && defined (HAVE_MKDTEMP) */
-
 void
 _initialize_index_cache ()
 {
@@ -456,8 +358,4 @@ _initialize_index_cache ()
 When non-zero, debugging output for the index cache is displayed."),
 			    NULL, NULL,
 			    &setdebuglist, &showdebuglist);
-
-#if GDB_SELF_TEST && defined (HAVE_MKDTEMP)
-  selftests::register_test ("mkdir_recursive", selftests::test_mkdir_recursive);
-#endif
 }
diff --git a/gdb/unittests/mkdir-recursive-selftests.c b/gdb/unittests/mkdir-recursive-selftests.c
new file mode 100644
index 0000000000..d501f8e081
--- /dev/null
+++ b/gdb/unittests/mkdir-recursive-selftests.c
@@ -0,0 +1,89 @@
+/* Self tests for scoped_fd for GDB, the GNU debugger.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+
+#include "common/filestuff.h"
+#include "selftest.h"
+
+namespace selftests {
+namespace mkdir_recursive {
+
+/* Try to create DIR using mkdir_recursive and make sure it exists.  */
+
+static bool
+create_dir_and_check (const char *dir)
+{
+  ::mkdir_recursive (dir);
+
+  struct stat st;
+  if (stat (dir, &st) != 0)
+    perror_with_name (("stat"));
+
+  return (st.st_mode & S_IFDIR) != 0;
+}
+
+/* Test mkdir_recursive.  */
+
+static void
+test ()
+{
+  char base[] = "/tmp/gdb-selftests-XXXXXX";
+
+  if (mkdtemp (base) == NULL)
+    perror_with_name (("mkdtemp"));
+
+  /* Try not to leave leftover directories.  */
+  struct cleanup_dirs {
+    cleanup_dirs (const char *base)
+      : m_base (base)
+    {}
+
+    ~cleanup_dirs () {
+      rmdir (string_printf ("%s/a/b/c/d/e", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b/c/d", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b/c", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b", m_base).c_str ());
+      rmdir (string_printf ("%s/a", m_base).c_str ());
+      rmdir (m_base);
+    }
+
+  private:
+    const char *m_base;
+  } cleanup_dirs (base);
+
+  std::string dir = string_printf ("%s/a/b", base);
+  SELF_CHECK (create_dir_and_check (dir.c_str ()));
+
+  dir = string_printf ("%s/a/b/c//d/e/", base);
+  SELF_CHECK (create_dir_and_check (dir.c_str ()));
+}
+
+}
+}
+
+void
+_initialize_mkdir_recursive_selftests ()
+{
+#if defined (HAVE_MKDTEMP)
+  selftests::register_test ("mkdir_recursive",
+			    selftests::mkdir_recursive::test);
+#endif
+}
+
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 0/6] A different approach to startup-with-shell on macOS
@ 2018-10-18 22:31 Tom Tromey
  2018-10-18 22:31 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey
  0 siblings, 1 reply; 8+ messages in thread
From: Tom Tromey @ 2018-10-18 22:31 UTC (permalink / raw)
  To: gdb-patches

Here's version 2 of the series to cache the shell on macOS.

I believe this addresses all review comments.

Tom


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 4/6] Use mkostemp, not mkstemp
  2018-10-18 22:31 [PATCH v2 0/6] A different approach to startup-with-shell on macOS Tom Tromey
@ 2018-10-18 22:31 ` Tom Tromey
  0 siblings, 0 replies; 8+ messages in thread
From: Tom Tromey @ 2018-10-18 22:31 UTC (permalink / raw)
  To: gdb-patches; +Cc: Tom Tromey

I noticed that gdb could leak file descriptors coming from mkstemp.
This patch fixes the problem by importing the gnulib mkostemp instead,
and then changing gdb to pass O_CLOEXEC.

A small gnulib patch was needed.  This has already been accepted
upstream.

gdb/ChangeLog
2018-10-18  Tom Tromey  <tom@tromey.com>

	* unittests/scoped_mmap-selftests.c (test_normal): Use
	gdb_mkostemp_cloexec.
	* unittests/scoped_fd-selftests.c (test_destroy, test_release):
	Use gdb_mkostemp_cloexec.
	* gnulib/aclocal-m4-deps.mk, gnulib/aclocal.m4,
	gnulib/config.in, gnulib/configure,
	gnulib/import/Makefile.am, gnulib/import/Makefile.in,
	gnulib/import/m4/gnulib-cache.m4,
	gnulib/import/m4/gnulib-comp.m4: Update.
	* gnulib/import/m4/mkostemp.m4: New file.
	* gnulib/import/m4/mkstemp.m4: Remove.
	* gnulib/import/mkostemp.c: New file.
	* gnulib/import/mkstemp.m4: Remove.
	* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Remove
	mkstemp, add mkostemp.  Apply new patch.
	* gnulib/import/stdlib.in.h: Apply patch.
	* gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch:
	New file.
	* dwarf-index-write.c (write_psymtabs_to_index): Use
	gdb_mkostemp_cloexec.
	* common/filestuff.h (gdb_mkostemp_cloexec): New function.
---
 gdb/ChangeLog                                 | 24 +++++
 gdb/common/filestuff.h                        | 11 +++
 gdb/dwarf-index-write.c                       |  5 +-
 gdb/gnulib/aclocal-m4-deps.mk                 |  2 +-
 gdb/gnulib/aclocal.m4                         |  2 +-
 gdb/gnulib/config.in                          | 12 ++-
 gdb/gnulib/configure                          | 95 +++----------------
 gdb/gnulib/import/Makefile.am                 | 10 +-
 gdb/gnulib/import/Makefile.in                 | 18 ++--
 gdb/gnulib/import/m4/gnulib-cache.m4          |  4 +-
 gdb/gnulib/import/m4/gnulib-comp.m4           | 17 ++--
 gdb/gnulib/import/m4/mkostemp.m4              | 23 +++++
 gdb/gnulib/import/m4/mkstemp.m4               | 82 ----------------
 gdb/gnulib/import/{mkstemp.c => mkostemp.c}   | 12 +--
 gdb/gnulib/import/stdlib.in.h                 |  3 +-
 ...ps-Fix-compilation-error-in-C-mode-o.patch | 38 ++++++++
 gdb/gnulib/update-gnulib.sh                   |  3 +-
 gdb/unittests/scoped_fd-selftests.c           |  5 +-
 gdb/unittests/scoped_mmap-selftests.c         |  3 +-
 19 files changed, 162 insertions(+), 207 deletions(-)
 create mode 100644 gdb/gnulib/import/m4/mkostemp.m4
 delete mode 100644 gdb/gnulib/import/m4/mkstemp.m4
 rename gdb/gnulib/import/{mkstemp.c => mkostemp.c} (79%)
 create mode 100644 gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch

diff --git a/gdb/common/filestuff.h b/gdb/common/filestuff.h
index ecfc18d600..9a12f83c27 100644
--- a/gdb/common/filestuff.h
+++ b/gdb/common/filestuff.h
@@ -20,6 +20,7 @@
 #define FILESTUFF_H
 
 #include <dirent.h>
+#include <fcntl.h>
 
 /* Note all the file descriptors which are open when this is called.
    These file descriptors will not be closed by close_most_fds.  */
@@ -48,6 +49,16 @@ extern void close_most_fds (void);
 extern int gdb_open_cloexec (const char *filename, int flags,
 			     /* mode_t */ unsigned long mode);
 
+/* Like mkstemp, but ensures that the file descriptor is
+   close-on-exec.  */
+
+static inline int
+gdb_mkostemp_cloexec (char *name_template, int flags = 0)
+{
+  /* gnulib provides a mkostemp replacement if needed.  */
+  return mkostemp (name_template, flags | O_CLOEXEC);
+}
+
 /* Convenience wrapper for the above, which takes the filename as an
    std::string.  */
 
diff --git a/gdb/dwarf-index-write.c b/gdb/dwarf-index-write.c
index 4335c39074..e07bda9c08 100644
--- a/gdb/dwarf-index-write.c
+++ b/gdb/dwarf-index-write.c
@@ -1567,7 +1567,7 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
   gdb::char_vector filename_temp = make_temp_filename (filename);
 
   gdb::optional<scoped_fd> out_file_fd
-    (gdb::in_place, mkstemp (filename_temp.data ()));
+    (gdb::in_place, gdb_mkostemp_cloexec (filename_temp.data (), O_BINARY));
   if (out_file_fd->get () == -1)
     perror_with_name (("mkstemp"));
 
@@ -1591,7 +1591,8 @@ write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile,
       gdb::char_vector filename_str_temp = make_temp_filename (filename_str);
 
       gdb::optional<scoped_fd> out_file_str_fd
-	(gdb::in_place, mkstemp (filename_str_temp.data ()));
+	(gdb::in_place, gdb_mkostemp_cloexec (filename_str_temp.data (),
+					      O_BINARY));
       if (out_file_str_fd->get () == -1)
         perror_with_name (("mkstemp"));
 
diff --git a/gdb/gnulib/aclocal-m4-deps.mk b/gdb/gnulib/aclocal-m4-deps.mk
index d866b6de89..5b2c6cc5ea 100644
--- a/gdb/gnulib/aclocal-m4-deps.mk
+++ b/gdb/gnulib/aclocal-m4-deps.mk
@@ -80,7 +80,7 @@ aclocal_m4_deps = \
 	import/m4/mempcpy.m4 \
 	import/m4/memrchr.m4 \
 	import/m4/mkdir.m4 \
-	import/m4/mkstemp.m4 \
+	import/m4/mkostemp.m4 \
 	import/m4/mmap-anon.m4 \
 	import/m4/mode_t.m4 \
 	import/m4/msvc-inval.m4 \
diff --git a/gdb/gnulib/aclocal.m4 b/gdb/gnulib/aclocal.m4
index 740387ac34..861caf6692 100644
--- a/gdb/gnulib/aclocal.m4
+++ b/gdb/gnulib/aclocal.m4
@@ -1353,7 +1353,7 @@ m4_include([import/m4/memmem.m4])
 m4_include([import/m4/mempcpy.m4])
 m4_include([import/m4/memrchr.m4])
 m4_include([import/m4/mkdir.m4])
-m4_include([import/m4/mkstemp.m4])
+m4_include([import/m4/mkostemp.m4])
 m4_include([import/m4/mmap-anon.m4])
 m4_include([import/m4/mode_t.m4])
 m4_include([import/m4/msvc-inval.m4])
diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index d32b192e0b..d23d208cb2 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -95,6 +95,10 @@
    whether the gnulib module getcwd shall be considered present. */
 #undef GNULIB_GETCWD
 
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module mkostemp shall be considered present. */
+#undef GNULIB_MKOSTEMP
+
 /* Define to a C preprocessor expression that evaluates to 1 or 0, depending
    whether the gnulib module openat shall be considered present. */
 #undef GNULIB_OPENAT
@@ -199,8 +203,8 @@
 /* Define to 1 when the gnulib module memrchr should be tested. */
 #undef GNULIB_TEST_MEMRCHR
 
-/* Define to 1 when the gnulib module mkstemp should be tested. */
-#undef GNULIB_TEST_MKSTEMP
+/* Define to 1 when the gnulib module mkostemp should be tested. */
+#undef GNULIB_TEST_MKOSTEMP
 
 /* Define to 1 when the gnulib module open should be tested. */
 #undef GNULIB_TEST_OPEN
@@ -544,8 +548,8 @@
    when it succeeds. */
 #undef HAVE_MINIMALLY_WORKING_GETCWD
 
-/* Define to 1 if you have the 'mkstemp' function. */
-#undef HAVE_MKSTEMP
+/* Define to 1 if you have the 'mkostemp' function. */
+#undef HAVE_MKOSTEMP
 
 /* Define to 1 if you have the 'mprotect' function. */
 #undef HAVE_MPROTECT
diff --git a/gdb/gnulib/configure b/gdb/gnulib/configure
index dc6c5b6657..5d7f8aa004 100644
--- a/gdb/gnulib/configure
+++ b/gdb/gnulib/configure
@@ -3525,7 +3525,7 @@ gl_func_list="$gl_func_list mbsinit"
 gl_func_list="$gl_func_list mbrtowc"
 gl_header_list="$gl_header_list sys/mman.h"
 gl_func_list="$gl_func_list mprotect"
-gl_func_list="$gl_func_list mkstemp"
+gl_func_list="$gl_func_list mkostemp"
 gl_func_list="$gl_func_list openat"
 gl_func_list="$gl_func_list link"
 gl_func_list="$gl_func_list secure_getenv"
@@ -5841,7 +5841,7 @@ fi
   # Code from module mempcpy:
   # Code from module memrchr:
   # Code from module mkdir:
-  # Code from module mkstemp:
+  # Code from module mkostemp:
   # Code from module msvc-inval:
   # Code from module msvc-nothrow:
   # Code from module multiarch:
@@ -21893,116 +21893,51 @@ $as_echo "#define FUNC_MKDIR_DOT_BUG 1" >>confdefs.h
 
 
 
+
+
   :
 
 
 
 
 
-  if test $ac_cv_func_mkstemp = yes; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working mkstemp" >&5
-$as_echo_n "checking for working mkstemp... " >&6; }
-if ${gl_cv_func_working_mkstemp+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  if test $ac_cv_func_mkostemp != yes; then
+    HAVE_MKOSTEMP=0
+  fi
 
-        mkdir conftest.mkstemp
-        if test "$cross_compiling" = yes; then :
-  case "$host_os" in
-                     # Guess yes on glibc systems.
-             *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
-                     # If we don't know, assume the worst.
-             *)      gl_cv_func_working_mkstemp="guessing no" ;;
-           esac
+  if test $HAVE_MKOSTEMP = 0; then
 
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-int result = 0;
-              int i;
-              off_t large = (off_t) 4294967295u;
-              if (large < 0)
-                large = 2147483647;
-              umask (0);
-              for (i = 0; i < 70; i++)
-                {
-                  char templ[] = "conftest.mkstemp/coXXXXXX";
-                  int (*mkstemp_function) (char *) = mkstemp;
-                  int fd = mkstemp_function (templ);
-                  if (fd < 0)
-                    result |= 1;
-                  else
-                    {
-                      struct stat st;
-                      if (lseek (fd, large, SEEK_SET) != large)
-                        result |= 2;
-                      if (fstat (fd, &st) < 0)
-                        result |= 4;
-                      else if (st.st_mode & 0077)
-                        result |= 8;
-                      if (close (fd))
-                        result |= 16;
-                    }
-                }
-              return result;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  gl_cv_func_working_mkstemp=yes
-else
-  gl_cv_func_working_mkstemp=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
 
-        rm -rf conftest.mkstemp
 
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_working_mkstemp" >&5
-$as_echo "$gl_cv_func_working_mkstemp" >&6; }
-    case "$gl_cv_func_working_mkstemp" in
-      *yes) ;;
-      *)
-        REPLACE_MKSTEMP=1
-        ;;
-    esac
-  else
-    HAVE_MKSTEMP=0
-  fi
 
-  if test $HAVE_MKSTEMP = 0 || test $REPLACE_MKSTEMP = 1; then
 
 
 
 
+  gl_LIBOBJS="$gl_LIBOBJS mkostemp.$ac_objext"
 
 
 
+  fi
 
-  gl_LIBOBJS="$gl_LIBOBJS mkstemp.$ac_objext"
 
+cat >>confdefs.h <<_ACEOF
+#define GNULIB_MKOSTEMP 1
+_ACEOF
 
 
-  fi
 
 
 
 
 
-          GNULIB_MKSTEMP=1
+          GNULIB_MKOSTEMP=1
 
 
 
 
 
-$as_echo "#define GNULIB_TEST_MKSTEMP 1" >>confdefs.h
+$as_echo "#define GNULIB_TEST_MKOSTEMP 1" >>confdefs.h
 
 
 
diff --git a/gdb/gnulib/import/Makefile.am b/gdb/gnulib/import/Makefile.am
index d1bee0bc02..608c2c725c 100644
--- a/gdb/gnulib/import/Makefile.am
+++ b/gdb/gnulib/import/Makefile.am
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 AUTOMAKE_OPTIONS = 1.9.6 gnits
 
@@ -1223,14 +1223,14 @@ EXTRA_libgnu_a_SOURCES += mkdir.c
 
 ## end   gnulib module mkdir
 
-## begin gnulib module mkstemp
+## begin gnulib module mkostemp
 
 
-EXTRA_DIST += mkstemp.c
+EXTRA_DIST += mkostemp.c
 
-EXTRA_libgnu_a_SOURCES += mkstemp.c
+EXTRA_libgnu_a_SOURCES += mkostemp.c
 
-## end   gnulib module mkstemp
+## end   gnulib module mkostemp
 
 ## begin gnulib module msvc-inval
 
diff --git a/gdb/gnulib/import/Makefile.in b/gdb/gnulib/import/Makefile.in
index 7e4d278d91..8b0487ccc7 100644
--- a/gdb/gnulib/import/Makefile.in
+++ b/gdb/gnulib/import/Makefile.in
@@ -35,7 +35,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 
 
@@ -192,7 +192,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
 	$(top_srcdir)/import/m4/mempcpy.m4 \
 	$(top_srcdir)/import/m4/memrchr.m4 \
 	$(top_srcdir)/import/m4/mkdir.m4 \
-	$(top_srcdir)/import/m4/mkstemp.m4 \
+	$(top_srcdir)/import/m4/mkostemp.m4 \
 	$(top_srcdir)/import/m4/mmap-anon.m4 \
 	$(top_srcdir)/import/m4/mode_t.m4 \
 	$(top_srcdir)/import/m4/msvc-inval.m4 \
@@ -1515,7 +1515,7 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h arpa_inet.in.h \
 	malloca.valgrind math.in.h mbrtowc.c mbsinit.c \
 	mbsrtowcs-impl.h mbsrtowcs-state.c mbsrtowcs.c memchr.c \
 	memchr.valgrind memmem.c str-two-way.h mempcpy.c memrchr.c \
-	mkdir.c mkstemp.c msvc-inval.c msvc-inval.h msvc-nothrow.c \
+	mkdir.c mkostemp.c msvc-inval.c msvc-inval.h msvc-nothrow.c \
 	msvc-nothrow.h netinet_in.in.h open.c openat.c openat.h \
 	dirent-private.h opendir.c pathmax.h rawmemchr.c \
 	rawmemchr.valgrind dirent-private.h readdir.c readlink.c \
@@ -1587,11 +1587,11 @@ EXTRA_libgnu_a_SOURCES = alloca.c openat-proc.c canonicalize-lgpl.c \
 	gettimeofday.c glob.c inet_ntop.c isnan.c isnand.c isnan.c \
 	isnanl.c lstat.c malloc.c mbrtowc.c mbsinit.c \
 	mbsrtowcs-state.c mbsrtowcs.c memchr.c memmem.c mempcpy.c \
-	memrchr.c mkdir.c mkstemp.c msvc-inval.c msvc-nothrow.c open.c \
-	openat.c opendir.c rawmemchr.c readdir.c readlink.c realloc.c \
-	rename.c rewinddir.c rmdir.c secure_getenv.c setenv.c stat.c \
-	strchrnul.c strdup.c strerror.c strerror-override.c strstr.c \
-	strtok_r.c unsetenv.c
+	memrchr.c mkdir.c mkostemp.c msvc-inval.c msvc-nothrow.c \
+	open.c openat.c opendir.c rawmemchr.c readdir.c readlink.c \
+	realloc.c rename.c rewinddir.c rmdir.c secure_getenv.c \
+	setenv.c stat.c strchrnul.c strdup.c strerror.c \
+	strerror-override.c strstr.c strtok_r.c unsetenv.c
 
 # Use this preprocessor expression to decide whether #include_next works.
 # Do not rely on a 'configure'-time test for this, since the expression
@@ -1722,7 +1722,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mempcpy.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memrchr.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkdir.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkstemp.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/mkostemp.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/msvc-inval.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/msvc-nothrow.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/open.Po@am__quote@
diff --git a/gdb/gnulib/import/m4/gnulib-cache.m4 b/gdb/gnulib/import/m4/gnulib-cache.m4
index 442aad5563..8cefb67be7 100644
--- a/gdb/gnulib/import/m4/gnulib-cache.m4
+++ b/gdb/gnulib/import/m4/gnulib-cache.m4
@@ -27,7 +27,7 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkstemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
+#   gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl getcwd glob inet_ntop inttypes limits-h lstat memchr memmem mkdir mkostemp pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
@@ -48,7 +48,7 @@ gl_MODULES([
   memchr
   memmem
   mkdir
-  mkstemp
+  mkostemp
   pathmax
   rawmemchr
   readlink
diff --git a/gdb/gnulib/import/m4/gnulib-comp.m4 b/gdb/gnulib/import/m4/gnulib-comp.m4
index 21e4383c34..2c55958eb7 100644
--- a/gdb/gnulib/import/m4/gnulib-comp.m4
+++ b/gdb/gnulib/import/m4/gnulib-comp.m4
@@ -121,7 +121,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module mempcpy:
   # Code from module memrchr:
   # Code from module mkdir:
-  # Code from module mkstemp:
+  # Code from module mkostemp:
   # Code from module msvc-inval:
   # Code from module msvc-nothrow:
   # Code from module multiarch:
@@ -444,12 +444,13 @@ AC_DEFUN([gl_INIT],
   if test $REPLACE_MKDIR = 1; then
     AC_LIBOBJ([mkdir])
   fi
-  gl_FUNC_MKSTEMP
-  if test $HAVE_MKSTEMP = 0 || test $REPLACE_MKSTEMP = 1; then
-    AC_LIBOBJ([mkstemp])
-    gl_PREREQ_MKSTEMP
+  gl_FUNC_MKOSTEMP
+  if test $HAVE_MKOSTEMP = 0; then
+    AC_LIBOBJ([mkostemp])
+    gl_PREREQ_MKOSTEMP
   fi
-  gl_STDLIB_MODULE_INDICATOR([mkstemp])
+  gl_MODULE_INDICATOR([mkostemp])
+  gl_STDLIB_MODULE_INDICATOR([mkostemp])
   AC_REQUIRE([gl_MSVC_INVAL])
   if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
     AC_LIBOBJ([msvc-inval])
@@ -844,7 +845,7 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/mempcpy.c
   lib/memrchr.c
   lib/mkdir.c
-  lib/mkstemp.c
+  lib/mkostemp.c
   lib/msvc-inval.c
   lib/msvc-inval.h
   lib/msvc-nothrow.c
@@ -991,7 +992,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/mempcpy.m4
   m4/memrchr.m4
   m4/mkdir.m4
-  m4/mkstemp.m4
+  m4/mkostemp.m4
   m4/mmap-anon.m4
   m4/mode_t.m4
   m4/msvc-inval.m4
diff --git a/gdb/gnulib/import/m4/mkostemp.m4 b/gdb/gnulib/import/m4/mkostemp.m4
new file mode 100644
index 0000000000..1f44a0390a
--- /dev/null
+++ b/gdb/gnulib/import/m4/mkostemp.m4
@@ -0,0 +1,23 @@
+# mkostemp.m4 serial 2
+dnl Copyright (C) 2009-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MKOSTEMP],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+  dnl Persuade glibc <stdlib.h> to declare mkostemp().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([mkostemp])
+  if test $ac_cv_func_mkostemp != yes; then
+    HAVE_MKOSTEMP=0
+  fi
+])
+
+# Prerequisites of lib/mkostemp.c.
+AC_DEFUN([gl_PREREQ_MKOSTEMP],
+[
+])
diff --git a/gdb/gnulib/import/m4/mkstemp.m4 b/gdb/gnulib/import/m4/mkstemp.m4
deleted file mode 100644
index 131e4a7b26..0000000000
--- a/gdb/gnulib/import/m4/mkstemp.m4
+++ /dev/null
@@ -1,82 +0,0 @@
-#serial 23
-
-# Copyright (C) 2001, 2003-2007, 2009-2016 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
-# silly limit that it can create no more than 26 files from a given template.
-# Other systems lack mkstemp altogether.
-# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
-# only 32 files per process.
-# On some hosts, mkstemp creates files with mode 0666, which is a security
-# problem and a violation of POSIX 2008.
-# On systems like the above, arrange to use the replacement function.
-AC_DEFUN([gl_FUNC_MKSTEMP],
-[
-  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-
-  AC_CHECK_FUNCS_ONCE([mkstemp])
-  if test $ac_cv_func_mkstemp = yes; then
-    AC_CACHE_CHECK([for working mkstemp],
-      [gl_cv_func_working_mkstemp],
-      [
-        mkdir conftest.mkstemp
-        AC_RUN_IFELSE(
-          [AC_LANG_PROGRAM(
-            [AC_INCLUDES_DEFAULT],
-            [[int result = 0;
-              int i;
-              off_t large = (off_t) 4294967295u;
-              if (large < 0)
-                large = 2147483647;
-              umask (0);
-              for (i = 0; i < 70; i++)
-                {
-                  char templ[] = "conftest.mkstemp/coXXXXXX";
-                  int (*mkstemp_function) (char *) = mkstemp;
-                  int fd = mkstemp_function (templ);
-                  if (fd < 0)
-                    result |= 1;
-                  else
-                    {
-                      struct stat st;
-                      if (lseek (fd, large, SEEK_SET) != large)
-                        result |= 2;
-                      if (fstat (fd, &st) < 0)
-                        result |= 4;
-                      else if (st.st_mode & 0077)
-                        result |= 8;
-                      if (close (fd))
-                        result |= 16;
-                    }
-                }
-              return result;]])],
-          [gl_cv_func_working_mkstemp=yes],
-          [gl_cv_func_working_mkstemp=no],
-          [case "$host_os" in
-                     # Guess yes on glibc systems.
-             *-gnu*) gl_cv_func_working_mkstemp="guessing yes" ;;
-                     # If we don't know, assume the worst.
-             *)      gl_cv_func_working_mkstemp="guessing no" ;;
-           esac
-          ])
-        rm -rf conftest.mkstemp
-      ])
-    case "$gl_cv_func_working_mkstemp" in
-      *yes) ;;
-      *)
-        REPLACE_MKSTEMP=1
-        ;;
-    esac
-  else
-    HAVE_MKSTEMP=0
-  fi
-])
-
-# Prerequisites of lib/mkstemp.c.
-AC_DEFUN([gl_PREREQ_MKSTEMP],
-[
-])
diff --git a/gdb/gnulib/import/mkstemp.c b/gdb/gnulib/import/mkostemp.c
similarity index 79%
rename from gdb/gnulib/import/mkstemp.c
rename to gdb/gnulib/import/mkostemp.c
index 90ed78e49e..31c3e4837f 100644
--- a/gdb/gnulib/import/mkstemp.c
+++ b/gdb/gnulib/import/mkostemp.c
@@ -24,7 +24,7 @@
 #if !_LIBC
 # include "tempname.h"
 # define __gen_tempname gen_tempname
-# ifndef __GT_FILE
+# ifndef __GTFILE
 #  define __GT_FILE GT_FILE
 # endif
 #endif
@@ -38,13 +38,9 @@
 /* Generate a unique temporary file name from XTEMPLATE.
    The last six characters of XTEMPLATE must be "XXXXXX";
    they are replaced with a string that makes the file name unique.
-   Then open the file and return a fd.
-
-   If you are creating temporary files which will later be removed,
-   consider using the clean-temp module, which avoids several pitfalls
-   of using mkstemp directly. */
+   Then open the file and return a fd. */
 int
-mkstemp (char *xtemplate)
+mkostemp (char *xtemplate, int flags)
 {
-  return __gen_tempname (xtemplate, 0, 0, __GT_FILE);
+  return __gen_tempname (xtemplate, 0, flags, __GT_FILE);
 }
diff --git a/gdb/gnulib/import/stdlib.in.h b/gdb/gnulib/import/stdlib.in.h
index db3253bd97..8f803a2ea3 100644
--- a/gdb/gnulib/import/stdlib.in.h
+++ b/gdb/gnulib/import/stdlib.in.h
@@ -87,9 +87,10 @@ struct random_data
 # endif
 #endif
 
-#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
+#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_MKOSTEMP@ || @GNULIB_MKOSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
 /* On Mac OS X 10.3, only <unistd.h> declares mkstemp.  */
 /* On Mac OS X 10.5, only <unistd.h> declares mkstemps.  */
+/* On Mac OS X 10.13, only <unistd.h> declares mkostemp and mkostemps.  */
 /* On Cygwin 1.7.1, only <unistd.h> declares getsubopt.  */
 /* But avoid namespace pollution on glibc systems and native Windows.  */
 # include <unistd.h>
diff --git a/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch b/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch
new file mode 100644
index 0000000000..35f917fac4
--- /dev/null
+++ b/gdb/gnulib/patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch
@@ -0,0 +1,38 @@
+From 6954995dd32ea98a1973df31f411f3996bb47dfb Mon Sep 17 00:00:00 2001
+From: Tom Tromey <tom@tromey.com>
+Date: Mon, 1 Oct 2018 14:57:45 -0600
+Subject: [PATCH] mkostemp, mkostemps: Fix compilation error in C++ mode on Mac
+ OS X.
+
+Attempting to use the mkostemp module in gdb caused a build failure
+when using the C++ namespace feature, because mkostemp was not
+declared.  On OS X, mkostemp is declared in unistd.h, so this patch
+extends the existing special case in stdlib.in.h to cover mkostemp and
+mkostemps.
+
+* lib/stdlib.in.h: Include <unistd.h> for mkostemp and mkostemps
+on OS X.
+---
+ ChangeLog       | 6 ++++++
+ lib/stdlib.in.h | 3 ++-
+ 2 files changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/gdb/gnulib/import/stdlib.in.h b/gdb/gnulib/import/stdlib.in.h
+index db3253bd97..8f803a2ea3 100644
+--- a/gdb/gnulib/import/stdlib.in.h
++++ b/gdb/gnulib/import/stdlib.in.h
+@@ -87,9 +87,10 @@ struct random_data
+ # endif
+ #endif
+ 
+-#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
++#if (@GNULIB_MKSTEMP@ || @GNULIB_MKSTEMPS@ || @GNULIB_MKOSTEMP@ || @GNULIB_MKOSTEMPS@ || @GNULIB_GETSUBOPT@ || defined GNULIB_POSIXCHECK) && ! defined __GLIBC__ && !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
+ /* On Mac OS X 10.3, only <unistd.h> declares mkstemp.  */
+ /* On Mac OS X 10.5, only <unistd.h> declares mkstemps.  */
++/* On Mac OS X 10.13, only <unistd.h> declares mkostemp and mkostemps.  */
+ /* On Cygwin 1.7.1, only <unistd.h> declares getsubopt.  */
+ /* But avoid namespace pollution on glibc systems and native Windows.  */
+ # include <unistd.h>
+-- 
+2.19.0
+
diff --git a/gdb/gnulib/update-gnulib.sh b/gdb/gnulib/update-gnulib.sh
index 09933ab9fe..5129450577 100755
--- a/gdb/gnulib/update-gnulib.sh
+++ b/gdb/gnulib/update-gnulib.sh
@@ -46,7 +46,7 @@ IMPORTED_GNULIB_MODULES="\
     memchr \
     memmem \
     mkdir \
-    mkstemp \
+    mkostemp \
     pathmax \
     rawmemchr \
     readlink \
@@ -169,6 +169,7 @@ apply_patches ()
 }
 
 apply_patches "patches/0001-Fix-PR-gdb-23558-Use-system-s-getcwd-when-cross-comp.patch"
+apply_patches "patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch"
 
 # Regenerate all necessary files...
 aclocal -Iimport/m4 &&
diff --git a/gdb/unittests/scoped_fd-selftests.c b/gdb/unittests/scoped_fd-selftests.c
index d5c0d30abb..fb6a0d675d 100644
--- a/gdb/unittests/scoped_fd-selftests.c
+++ b/gdb/unittests/scoped_fd-selftests.c
@@ -19,6 +19,7 @@
 
 #include "defs.h"
 
+#include "common/filestuff.h"
 #include "common/scoped_fd.h"
 #include "config.h"
 #include "selftest.h"
@@ -31,7 +32,7 @@ static void
 test_destroy ()
 {
   char filename[] = "scoped_fd-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   unlink (filename);
@@ -50,7 +51,7 @@ static void
 test_release ()
 {
   char filename[] = "scoped_fd-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   unlink (filename);
diff --git a/gdb/unittests/scoped_mmap-selftests.c b/gdb/unittests/scoped_mmap-selftests.c
index b181e02f50..75d1aeda8a 100644
--- a/gdb/unittests/scoped_mmap-selftests.c
+++ b/gdb/unittests/scoped_mmap-selftests.c
@@ -19,6 +19,7 @@
 
 #include "defs.h"
 
+#include "common/filestuff.h"
 #include "common/scoped_mmap.h"
 #include "config.h"
 
@@ -88,7 +89,7 @@ static void
 test_normal ()
 {
   char filename[] = "scoped_mmapped_file-selftest-XXXXXX";
-  int fd = mkstemp (filename);
+  int fd = gdb_mkostemp_cloexec (filename);
   SELF_CHECK (fd >= 0);
 
   SELF_CHECK (write (fd, "Hello!", 7) == 7);
-- 
2.17.1

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2018-10-18 22:31 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-10-03 21:02 [PATCH 2 0/6] A different approach to starutp-with-shell on macOS Tom Tromey
2018-10-03 21:02 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey
2018-10-03 21:02 ` [PATCH v2 1/6] Unify shell-finding logic Tom Tromey
2018-10-03 21:02 ` [PATCH v2 5/6] Do not reopen temporary files Tom Tromey
2018-10-03 21:02 ` [PATCH v2 6/6] Cache a copy of the user's shell on macOS Tom Tromey
2018-10-03 21:02 ` [PATCH v2 2/6] Move make_temp_filename to common/pathstuff.c Tom Tromey
2018-10-03 21:02 ` [PATCH v2 3/6] Move mkdir_recursive to common/filestuff.c Tom Tromey
2018-10-18 22:31 [PATCH v2 0/6] A different approach to startup-with-shell on macOS Tom Tromey
2018-10-18 22:31 ` [PATCH v2 4/6] Use mkostemp, not mkstemp Tom Tromey

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