Add support for spawning processes using posix_spawn()

configure.ac

@@ -249,7 +249,7 @@
 dnl -----------------------------------------------------------
 dnl Native java.math.BigInteger (enabled by default)
 dnl -----------------------------------------------------------
 AC_ARG_ENABLE([gmp],
               [AS_HELP_STRING(--enable-gmp,
                               compile native java.math.BigInteger library (disabled by --disable-gmp) [default=yes])],
               [case "${enableval}" in
@@ -308,7 +308,7 @@
             [
              ANTLR_JAR=$withval
             ],
             [
              ANTLR_JAR="$ANTLR_JAR"
             ])
 
@@ -345,13 +345,13 @@
               [if test -e ${srcdir}/tools/generated/gnu/classpath/tools/gjdoc/expr/JavaLexer.java; then
 			REGENERATE_GJDOC_PARSER=no ;
 		   else
 			REGENERATE_GJDOC_PARSER=yes ;
 	       fi])
 AC_MSG_RESULT(${REGENERATE_GJDOC_PARSER})
 AM_CONDITIONAL(CREATE_GJDOC_PARSER, test "x${REGENERATE_GJDOC_PARSER}" = xyes)
 
 dnl -----------------------------------------------------------
 dnl Enable tool wrapper binaries (disabled by default)
 dnl -----------------------------------------------------------
 AC_ARG_ENABLE([tool-wrappers],
               [AS_HELP_STRING(--enable-tool-wrappers,create tool wrapper binaries [default=no])],
@@ -405,14 +405,14 @@
 if test "x${COMPILE_JNI}" = xyes; then
   GCC_ATTRIBUTE_UNUSED
 
   AC_HEADER_STDC
 
   dnl Checking sizeof void * is needed for fdlibm to work properly on ppc64, 
   dnl at least. 
   AC_COMPILE_CHECK_SIZEOF(void *)
 
   dnl Checking for endianess.
   AC_C_BIGENDIAN_CROSS
 
   dnl We check for sys/filio.h because Solaris 2.5 defines FIONREAD there.
   dnl On that system, sys/ioctl.h will not include sys/filio.h unless
@@ -443,8 +443,9 @@
   AC_SEARCH_LIBS([inet_pton],[nsl])
   AC_CHECK_LIB([socket], [gethostname]) 
 
   AC_CHECK_FUNCS([ftruncate fsync select \
 		  gethostname socket strerror fork pipe execve open close close_range \
+		  posix_spawn \
 		  lseek fstat read readv write writev htonl memset htons connect \
 		  getsockname getpeername bind listen accept \
 		  recvfrom send sendto setsockopt getsockopt time mktime clock_gettime \
@@ -469,7 +470,7 @@
                      AC_MSG_RESULT(yes)],
                     [AC_MSG_RESULT(no)])
 
   AC_HEADER_TIME
   AC_STRUCT_TM
   AC_STRUCT_TIMEZONE
 
@@ -978,7 +979,7 @@
               esac],
               [])
 
 AX_CREATE_STDINT_H([include/config-int.h])
 
 dnl -----------------------------------------------------------------------
 dnl                    Support for using a prebuilt class library

native/jni/java-lang/java_lang_VMProcess.c

@@ -117,14 +117,15 @@ copy_elem (JNIEnv * env, jobject stringArray, jint i)
 }
 
 /*
- * private final native void nativeSpawn(String[], String[], File)
+ * private final native void nativeSpawn(String[], String[], File, boolean, boolean)
  *	throws java/io/IOException
  */
 JNIEXPORT void JNICALL
 Java_java_lang_VMProcess_nativeSpawn (JNIEnv * env, jobject this,
 				      jobjectArray cmdArray,
 				      jobjectArray envArray, jobject dirFile,
-				      jboolean redirect)
+				      jboolean redirect,
+				      jboolean usePosixSpawn)
 {
   int fds[CPIO_EXEC_NUM_PIPES] = { -1, -1, -1 };
   jobject streams[CPIO_EXEC_NUM_PIPES] = { NULL, NULL, NULL };
@@ -206,7 +207,7 @@ Java_java_lang_VMProcess_nativeSpawn (JNIEnv * env, jobject this,
     }
 
   /* Create inter-process pipes */
-  err = cpproc_forkAndExec(strings, newEnviron, fds, pipe_count, &pid, dir);
+  err = cpproc_forkAndExec(strings, newEnviron, fds, pipe_count, &pid, dir, usePosixSpawn);
   if (err != 0)
     {
       strncpy(errbuf, cpnative_getErrorString (err), sizeof(errbuf));

native/jni/native-lib/.gitignore

@@ -6,3 +6,4 @@
 .deps
 Makefile
 Makefile.in
+cpspawnhelper

native/jni/native-lib/Makefile.am

@@ -5,9 +5,23 @@ libclasspathnative_la_SOURCES = cpnet.c \
 				cpio.h \
 				cpnative.h \
 				cpproc.h \
-				cpproc.c
+				cpproc.c \
+				cpproc-child.h \
+				cpproc-child.c
+
+spawnhelperdir = $(pkglibdir)
+spawnhelper_PROGRAMS = cpspawnhelper
+cpspawnhelper_SOURCES = cpspawnhelper.c \
+			cpproc-child.h \
+			cpproc-child.c
+
+# Keep the helper's objects separate from the libtool objects built from
+# the same sources. Per-target CFLAGS trigger Automake's target-specific
+# object names; assigning AM_CFLAGS leaves the effective flags unchanged.
+cpspawnhelper_CFLAGS = $(AM_CFLAGS)
 
 AM_LDFLAGS = @CLASSPATH_CONVENIENCE@
-AM_CPPFLAGS = @CLASSPATH_INCLUDES@
+AM_CPPFLAGS = @CLASSPATH_INCLUDES@ \
+	      -DCPPROC_SPAWN_HELPER='"$(pkglibdir)/cpspawnhelper"'
 AM_CFLAGS = @WARNING_CFLAGS@ @STRICT_WARNING_CFLAGS@ @ERROR_CFLAGS@ \
             @EXTRA_CFLAGS@