7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries

Reviewed-by: dholmes, dsamersoff
Contributed-by: NChris Hegarty <chris.hegarty@oracle.com>

src/os/bsd/vm/os_bsd.cpp

@@ -5778,15 +5778,18 @@ int os::fork_and_exec(char* cmd) {
 
 // is_headless_jre()
 //
-// Test for the existence of libmawt in motif21 or xawt directories
+// Test for the existence of xawt/libmawt.so or libawt_xawt.so
 // in order to report if we are running in a headless jre
 //
+// Since JDK8 xawt/libmawt.so was moved into the same directory
+// as libawt.so, and renamed libawt_xawt.so
+//
 bool os::is_headless_jre() {
     struct stat statbuf;
     char buf[MAXPATHLEN];
     char libmawtpath[MAXPATHLEN];
     const char *xawtstr  = "/xawt/libmawt" JNI_LIB_SUFFIX;
-    const char *motifstr = "/motif21/libmawt" JNI_LIB_SUFFIX;
+    const char *new_xawtstr = "/libawt_xawt" JNI_LIB_SUFFIX;
     char *p;
 
     // Get path to libjvm.so
@@ -5807,9 +5810,9 @@ bool os::is_headless_jre() {
     strcat(libmawtpath, xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
-    // check motif21/libmawt.so
+    // check libawt_xawt.so
     strcpy(libmawtpath, buf);
-    strcat(libmawtpath, motifstr);
+    strcat(libmawtpath, new_xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
     return true;

src/os/linux/vm/os_linux.cpp

@@ -5425,15 +5425,18 @@ int os::fork_and_exec(char* cmd) {
 
 // is_headless_jre()
 //
-// Test for the existence of libmawt in motif21 or xawt directories
+// Test for the existence of xawt/libmawt.so or libawt_xawt.so
 // in order to report if we are running in a headless jre
 //
+// Since JDK8 xawt/libmawt.so was moved into the same directory
+// as libawt.so, and renamed libawt_xawt.so
+//
 bool os::is_headless_jre() {
     struct stat statbuf;
     char buf[MAXPATHLEN];
     char libmawtpath[MAXPATHLEN];
     const char *xawtstr  = "/xawt/libmawt.so";
-    const char *motifstr = "/motif21/libmawt.so";
+    const char *new_xawtstr = "/libawt_xawt.so";
     char *p;
 
     // Get path to libjvm.so
@@ -5454,9 +5457,9 @@ bool os::is_headless_jre() {
     strcat(libmawtpath, xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
-    // check motif21/libmawt.so
+    // check libawt_xawt.so
     strcpy(libmawtpath, buf);
-    strcat(libmawtpath, motifstr);
+    strcat(libmawtpath, new_xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
     return true;

src/os/solaris/vm/os_solaris.cpp

@@ -6311,15 +6311,18 @@ int os::fork_and_exec(char* cmd) {
 
 // is_headless_jre()
 //
-// Test for the existence of libmawt in motif21 or xawt directories
+// Test for the existence of xawt/libmawt.so or libawt_xawt.so
 // in order to report if we are running in a headless jre
 //
+// Since JDK8 xawt/libmawt.so was moved into the same directory
+// as libawt.so, and renamed libawt_xawt.so
+//
 bool os::is_headless_jre() {
     struct stat statbuf;
     char buf[MAXPATHLEN];
     char libmawtpath[MAXPATHLEN];
     const char *xawtstr  = "/xawt/libmawt.so";
-    const char *motifstr = "/motif21/libmawt.so";
+    const char *new_xawtstr = "/libawt_xawt.so";
     char *p;
 
     // Get path to libjvm.so
@@ -6340,9 +6343,9 @@ bool os::is_headless_jre() {
     strcat(libmawtpath, xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
-    // check motif21/libmawt.so
+    // check libawt_xawt.so
     strcpy(libmawtpath, buf);
-    strcat(libmawtpath, motifstr);
+    strcat(libmawtpath, new_xawtstr);
     if (::stat(libmawtpath, &statbuf) == 0) return false;
 
     return true;