Use mincore instead of msync when available

configure.in

@@ -76,7 +76,7 @@ dnl Checks for library functions.
 AC_FUNC_MEMCMP
 AC_TYPE_SIGNAL
 AC_CHECK_FUNCS(dl_iterate_phdr dl_phdr_removals_counter dlmodinfo getunwind \
-		ttrace)
+		ttrace mincore)
 is_gcc_m64() {
  if test `echo $CFLAGS | grep "\-m64" -c` -eq 1 ; then echo ppc64;
  else

src/x86/Ginit.c

@@ -24,6 +24,10 @@ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -83,6 +87,9 @@ static int
 validate_mem (unw_word_t addr)
 {
   int i, victim;
+#ifdef HAVE_MINCORE
+  char mvec[1];
+#endif
 
   addr = PAGE_START(addr);
 
@@ -95,7 +102,11 @@ validate_mem (unw_word_t addr)
 	return 0;
     }
 
+#ifdef HAVE_MINCORE
+  if (mincore ((void *) addr, 1, mvec) == -1)
+#else
   if (msync ((void *) addr, 1, MS_ASYNC) == -1)
+#endif
     return -1;
 
   victim = lga_victim;

src/x86_64/Ginit.c

@@ -86,6 +86,9 @@ static int
 validate_mem (unw_word_t addr)
 {
   int i, victim;
+#ifdef HAVE_MINCORE
+  char mvec[1];
+#endif
 
   addr = PAGE_START(addr);
 
@@ -98,7 +101,11 @@ validate_mem (unw_word_t addr)
 	return 0;
     }
 
+#ifdef HAVE_MINCORE
+  if (mincore ((void *) addr, 1, mvec) == -1)
+#else
   if (msync ((void *) addr, 1, MS_ASYNC) == -1)
+#endif
     return -1;
 
   victim = lga_victim;

tests/Makefile.am

@@ -39,6 +39,7 @@ endif #ARCH_IA64
 			Gtest-concurrent Ltest-concurrent		 \
 			Gtest-resume-sig Ltest-resume-sig		 \
 			Gtest-dyn1 Ltest-dyn1				 \
+			Gtest-simple					 \
 			test-async-sig test-flush-cache test-init-remote \
 			test-mem test-setjmp test-ptrace		 \
 			Ltest-nomalloc rs-race
@@ -89,6 +90,7 @@ Ltest_cxx_exceptions_SOURCES = Ltest-cxx-exceptions.cxx
 
 Gtest_dyn1_SOURCES = Gtest-dyn1.c flush-cache.S
 Ltest_dyn1_SOURCES = Ltest-dyn1.c flush-cache.S
+Gtest_simple_SOURCES = Gtest-simple.cxx
 test_static_link_SOURCES = test-static-link-loc.c test-static-link-gen.c
 test_static_link_LDFLAGS = -static
 forker_LDFLAGS = -static