--- a/hotspot/src/os/bsd/vm/os_bsd.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/bsd/vm/os_bsd.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1234,12 +1234,13 @@
   Dl_info dlinfo;
 
   if (libjvm_base_addr == NULL) {
-    dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
-    libjvm_base_addr = (address)dlinfo.dli_fbase;
+    if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
+      libjvm_base_addr = (address)dlinfo.dli_fbase;
+    }
     assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
   }
 
-  if (dladdr((void *)addr, &dlinfo)) {
+  if (dladdr((void *)addr, &dlinfo) != 0) {
     if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
   }
 
@@ -1251,35 +1252,40 @@
 
 bool os::dll_address_to_function_name(address addr, char *buf,
                                       int buflen, int *offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
   char localbuf[MACH_MAXSYMLEN];
 
-  // dladdr will find names of dynamic functions only, but does
-  // it set dli_fbase with mach_header address when it "fails" ?
-  if (dladdr((void*)addr, &dlinfo) && dlinfo.dli_sname != NULL) {
-    if (buf != NULL) {
-      if(!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
+  if (dladdr((void*)addr, &dlinfo) != 0) {
+    // see if we have a matching symbol
+    if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
+      if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
         jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
       }
+      if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
+      return true;
+    }
+    // no matching symbol so try for just file info
+    if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
+      if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
+                          buf, buflen, offset, dlinfo.dli_fname)) {
+         return true;
+      }
     }
-    if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
-    return true;
-  } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
-    if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
-       buf, buflen, offset, dlinfo.dli_fname)) {
-       return true;
+
+    // Handle non-dynamic manually:
+    if (dlinfo.dli_fbase != NULL &&
+        Decoder::decode(addr, localbuf, MACH_MAXSYMLEN, offset,
+                        dlinfo.dli_fbase)) {
+      if (!Decoder::demangle(localbuf, buf, buflen)) {
+        jio_snprintf(buf, buflen, "%s", localbuf);
+      }
+      return true;
     }
   }
-
-  // Handle non-dymanic manually:
-  if (dlinfo.dli_fbase != NULL &&
-      Decoder::decode(addr, localbuf, MACH_MAXSYMLEN, offset, dlinfo.dli_fbase)) {
-    if(!Decoder::demangle(localbuf, buf, buflen)) {
-      jio_snprintf(buf, buflen, "%s", localbuf);
-    }
-    return true;
-  }
-  if (buf != NULL) buf[0] = '\0';
+  buf[0] = '\0';
   if (offset != NULL) *offset = -1;
   return false;
 }
@@ -1287,17 +1293,24 @@
 // ported from solaris version
 bool os::dll_address_to_library_name(address addr, char* buf,
                                      int buflen, int* offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
 
-  if (dladdr((void*)addr, &dlinfo)){
-     if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
-     if (offset) *offset = addr - (address)dlinfo.dli_fbase;
-     return true;
-  } else {
-     if (buf) buf[0] = '\0';
-     if (offset) *offset = -1;
-     return false;
+  if (dladdr((void*)addr, &dlinfo) != 0) {
+    if (dlinfo.dli_fname != NULL) {
+      jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
+    }
+    if (dlinfo.dli_fbase != NULL && offset != NULL) {
+      *offset = addr - (address)dlinfo.dli_fbase;
+    }
+    return true;
   }
+
+  buf[0] = '\0';
+  if (offset) *offset = -1;
+  return false;
 }
 
 // Loads .dll/.so and
@@ -1520,49 +1533,50 @@
 }
 
 void os::print_dll_info(outputStream *st) {
-   st->print_cr("Dynamic libraries:");
+  st->print_cr("Dynamic libraries:");
 #ifdef RTLD_DI_LINKMAP
-    Dl_info dli;
-    void *handle;
-    Link_map *map;
-    Link_map *p;
-
-    if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-    handle = dlopen(dli.dli_fname, RTLD_LAZY);
-    if (handle == NULL) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-    dlinfo(handle, RTLD_DI_LINKMAP, &map);
-    if (map == NULL) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-
-    while (map->l_prev != NULL)
-        map = map->l_prev;
-
-    while (map != NULL) {
-        st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
-        map = map->l_next;
-    }
-
-    dlclose(handle);
+  Dl_info dli;
+  void *handle;
+  Link_map *map;
+  Link_map *p;
+
+  if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 ||
+      dli.dli_fname == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+  handle = dlopen(dli.dli_fname, RTLD_LAZY);
+  if (handle == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+  dlinfo(handle, RTLD_DI_LINKMAP, &map);
+  if (map == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+
+  while (map->l_prev != NULL)
+    map = map->l_prev;
+
+  while (map != NULL) {
+    st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
+    map = map->l_next;
+  }
+
+  dlclose(handle);
 #elif defined(__APPLE__)
-    uint32_t count;
-    uint32_t i;
-
-    count = _dyld_image_count();
-    for (i = 1; i < count; i++) {
-        const char *name = _dyld_get_image_name(i);
-        intptr_t slide = _dyld_get_image_vmaddr_slide(i);
-        st->print_cr(PTR_FORMAT " \t%s", slide, name);
-    }
+  uint32_t count;
+  uint32_t i;
+
+  count = _dyld_image_count();
+  for (i = 1; i < count; i++) {
+    const char *name = _dyld_get_image_name(i);
+    intptr_t slide = _dyld_get_image_vmaddr_slide(i);
+    st->print_cr(PTR_FORMAT " \t%s", slide, name);
+  }
 #else
-   st->print_cr("Error: Cannot print dynamic libraries.");
+  st->print_cr("Error: Cannot print dynamic libraries.");
 #endif
 }
 
@@ -1707,8 +1721,11 @@
   bool ret = dll_address_to_library_name(
                 CAST_FROM_FN_PTR(address, os::jvm_path),
                 dli_fname, sizeof(dli_fname), NULL);
-  assert(ret != 0, "cannot locate libjvm");
-  char *rp = realpath(dli_fname, buf);
+  assert(ret, "cannot locate libjvm");
+  char *rp = NULL;
+  if (ret && dli_fname[0] != '\0') {
+    rp = realpath(dli_fname, buf);
+  }
   if (rp == NULL)
     return;
 
@@ -3747,20 +3764,20 @@
 bool os::find(address addr, outputStream* st) {
   Dl_info dlinfo;
   memset(&dlinfo, 0, sizeof(dlinfo));
-  if (dladdr(addr, &dlinfo)) {
+  if (dladdr(addr, &dlinfo) != 0) {
     st->print(PTR_FORMAT ": ", addr);
-    if (dlinfo.dli_sname != NULL) {
+    if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
       st->print("%s+%#x", dlinfo.dli_sname,
                  addr - (intptr_t)dlinfo.dli_saddr);
-    } else if (dlinfo.dli_fname) {
+    } else if (dlinfo.dli_fbase != NULL) {
       st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase);
     } else {
       st->print("<absolute address>");
     }
-    if (dlinfo.dli_fname) {
+    if (dlinfo.dli_fname != NULL) {
       st->print(" in %s", dlinfo.dli_fname);
     }
-    if (dlinfo.dli_fbase) {
+    if (dlinfo.dli_fbase != NULL) {
       st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
     }
     st->cr();
@@ -3773,7 +3790,7 @@
       if (!lowest)  lowest = (address) dlinfo.dli_fbase;
       if (begin < lowest)  begin = lowest;
       Dl_info dlinfo2;
-      if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
+      if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
           && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
         end = (address) dlinfo2.dli_saddr;
       Disassembler::decode(begin, end, st);

--- a/hotspot/src/os/linux/vm/os_linux.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/linux/vm/os_linux.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1682,12 +1682,13 @@
   Dl_info dlinfo;
 
   if (libjvm_base_addr == NULL) {
-    dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
-    libjvm_base_addr = (address)dlinfo.dli_fbase;
+    if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
+      libjvm_base_addr = (address)dlinfo.dli_fbase;
+    }
     assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
   }
 
-  if (dladdr((void *)addr, &dlinfo)) {
+  if (dladdr((void *)addr, &dlinfo) != 0) {
     if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
   }
 
@@ -1696,24 +1697,30 @@
 
 bool os::dll_address_to_function_name(address addr, char *buf,
                                       int buflen, int *offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
 
-  if (dladdr((void*)addr, &dlinfo) && dlinfo.dli_sname != NULL) {
-    if (buf != NULL) {
-      if(!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
+  if (dladdr((void*)addr, &dlinfo) != 0) {
+    // see if we have a matching symbol
+    if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
+      if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
         jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
       }
+      if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
+      return true;
+    }
+    // no matching symbol so try for just file info
+    if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
+      if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
+                          buf, buflen, offset, dlinfo.dli_fname)) {
+        return true;
+      }
     }
-    if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
-    return true;
-  } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
-    if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
-        buf, buflen, offset, dlinfo.dli_fname)) {
-       return true;
-    }
-  }
-
-  if (buf != NULL) buf[0] = '\0';
+  }
+
+  buf[0] = '\0';
   if (offset != NULL) *offset = -1;
   return false;
 }
@@ -1764,6 +1771,9 @@
 
 bool os::dll_address_to_library_name(address addr, char* buf,
                                      int buflen, int* offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
   struct _address_to_library_name data;
 
@@ -1782,15 +1792,20 @@
      // buf already contains library name
      if (offset) *offset = addr - data.base;
      return true;
-  } else if (dladdr((void*)addr, &dlinfo)){
-     if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
-     if (offset) *offset = addr - (address)dlinfo.dli_fbase;
-     return true;
-  } else {
-     if (buf) buf[0] = '\0';
-     if (offset) *offset = -1;
-     return false;
-  }
+  }
+  if (dladdr((void*)addr, &dlinfo) != 0) {
+    if (dlinfo.dli_fname != NULL) {
+      jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
+    }
+    if (dlinfo.dli_fbase != NULL && offset != NULL) {
+      *offset = addr - (address)dlinfo.dli_fbase;
+    }
+    return true;
+  }
+
+  buf[0] = '\0';
+  if (offset) *offset = -1;
+  return false;
 }
 
   // Loads .dll/.so and
@@ -2317,8 +2332,11 @@
   bool ret = dll_address_to_library_name(
                 CAST_FROM_FN_PTR(address, os::jvm_path),
                 dli_fname, sizeof(dli_fname), NULL);
-  assert(ret != 0, "cannot locate libjvm");
-  char *rp = realpath(dli_fname, buf);
+  assert(ret, "cannot locate libjvm");
+  char *rp = NULL;
+  if (ret && dli_fname[0] != '\0') {
+    rp = realpath(dli_fname, buf);
+  }
   if (rp == NULL)
     return;
 
@@ -4730,20 +4748,20 @@
 bool os::find(address addr, outputStream* st) {
   Dl_info dlinfo;
   memset(&dlinfo, 0, sizeof(dlinfo));
-  if (dladdr(addr, &dlinfo)) {
+  if (dladdr(addr, &dlinfo) != 0) {
     st->print(PTR_FORMAT ": ", addr);
-    if (dlinfo.dli_sname != NULL) {
+    if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
       st->print("%s+%#x", dlinfo.dli_sname,
                  addr - (intptr_t)dlinfo.dli_saddr);
-    } else if (dlinfo.dli_fname) {
+    } else if (dlinfo.dli_fbase != NULL) {
       st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase);
     } else {
       st->print("<absolute address>");
     }
-    if (dlinfo.dli_fname) {
+    if (dlinfo.dli_fname != NULL) {
       st->print(" in %s", dlinfo.dli_fname);
     }
-    if (dlinfo.dli_fbase) {
+    if (dlinfo.dli_fbase != NULL) {
       st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
     }
     st->cr();
@@ -4756,7 +4774,7 @@
       if (!lowest)  lowest = (address) dlinfo.dli_fbase;
       if (begin < lowest)  begin = lowest;
       Dl_info dlinfo2;
-      if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
+      if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
           && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
         end = (address) dlinfo2.dli_saddr;
       Disassembler::decode(begin, end, st);

--- a/hotspot/src/os/solaris/vm/os_solaris.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/solaris/vm/os_solaris.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1924,12 +1924,13 @@
   Dl_info dlinfo;
 
   if (libjvm_base_addr == NULL) {
-    dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
-    libjvm_base_addr = (address)dlinfo.dli_fbase;
+    if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
+      libjvm_base_addr = (address)dlinfo.dli_fbase;
+    }
     assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
   }
 
-  if (dladdr((void *)addr, &dlinfo)) {
+  if (dladdr((void *)addr, &dlinfo) != 0) {
     if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
   }
 
@@ -1941,114 +1942,133 @@
 
 bool os::dll_address_to_function_name(address addr, char *buf,
                                       int buflen, int * offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
 
   // dladdr1_func was initialized in os::init()
-  if (dladdr1_func){
-      // yes, we have dladdr1
-
-      // Support for dladdr1 is checked at runtime; it may be
-      // available even if the vm is built on a machine that does
-      // not have dladdr1 support.  Make sure there is a value for
-      // RTLD_DL_SYMENT.
-      #ifndef RTLD_DL_SYMENT
-      #define RTLD_DL_SYMENT 1
-      #endif
+  if (dladdr1_func != NULL) {
+    // yes, we have dladdr1
+
+    // Support for dladdr1 is checked at runtime; it may be
+    // available even if the vm is built on a machine that does
+    // not have dladdr1 support.  Make sure there is a value for
+    // RTLD_DL_SYMENT.
+    #ifndef RTLD_DL_SYMENT
+    #define RTLD_DL_SYMENT 1
+    #endif
 #ifdef _LP64
-      Elf64_Sym * info;
+    Elf64_Sym * info;
 #else
-      Elf32_Sym * info;
+    Elf32_Sym * info;
 #endif
-      if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
-                       RTLD_DL_SYMENT)) {
-        if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
-          if (buf != NULL) {
-            if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
-              jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
-            }
-            if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
-            return true;
-        }
-      }
-      if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
-        if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
-           buf, buflen, offset, dlinfo.dli_fname)) {
+    if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
+                     RTLD_DL_SYMENT) != 0) {
+      // see if we have a matching symbol that covers our address
+      if (dlinfo.dli_saddr != NULL &&
+          (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
+        if (dlinfo.dli_sname != NULL) {
+          if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
+            jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
+          }
+          if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
           return true;
         }
       }
-      if (buf != NULL) buf[0] = '\0';
-      if (offset != NULL) *offset  = -1;
-      return false;
-  } else {
-      // no, only dladdr is available
-      if (dladdr((void *)addr, &dlinfo)) {
-        if (buf != NULL) {
-          if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
-            jio_snprintf(buf, buflen, dlinfo.dli_sname);
-        }
-        if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
-        return true;
-      } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
+      // no matching symbol so try for just file info
+      if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
         if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
-          buf, buflen, offset, dlinfo.dli_fname)) {
+                            buf, buflen, offset, dlinfo.dli_fname)) {
           return true;
         }
       }
-      if (buf != NULL) buf[0] = '\0';
-      if (offset != NULL) *offset  = -1;
-      return false;
-  }
+    }
+    buf[0] = '\0';
+    if (offset != NULL) *offset  = -1;
+    return false;
+  }
+
+  // no, only dladdr is available
+  if (dladdr((void *)addr, &dlinfo) != 0) {
+    // see if we have a matching symbol
+    if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
+      if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
+        jio_snprintf(buf, buflen, dlinfo.dli_sname);
+      }
+      if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
+      return true;
+    }
+    // no matching symbol so try for just file info
+    if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
+      if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
+                          buf, buflen, offset, dlinfo.dli_fname)) {
+        return true;
+      }
+    }
+  }
+  buf[0] = '\0';
+  if (offset != NULL) *offset  = -1;
+  return false;
 }
 
 bool os::dll_address_to_library_name(address addr, char* buf,
                                      int buflen, int* offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   Dl_info dlinfo;
 
-  if (dladdr((void*)addr, &dlinfo)){
-     if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
-     if (offset) *offset = addr - (address)dlinfo.dli_fbase;
-     return true;
-  } else {
-     if (buf) buf[0] = '\0';
-     if (offset) *offset = -1;
-     return false;
-  }
+  if (dladdr((void*)addr, &dlinfo) != 0) {
+    if (dlinfo.dli_fname != NULL) {
+      jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
+    }
+    if (dlinfo.dli_fbase != NULL && offset != NULL) {
+      *offset = addr - (address)dlinfo.dli_fbase;
+    }
+    return true;
+  }
+
+  buf[0] = '\0';
+  if (offset) *offset = -1;
+  return false;
 }
 
 // Prints the names and full paths of all opened dynamic libraries
 // for current process
 void os::print_dll_info(outputStream * st) {
-    Dl_info dli;
-    void *handle;
-    Link_map *map;
-    Link_map *p;
-
-    st->print_cr("Dynamic libraries:"); st->flush();
-
-    if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-    handle = dlopen(dli.dli_fname, RTLD_LAZY);
-    if (handle == NULL) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-    dlinfo(handle, RTLD_DI_LINKMAP, &map);
-    if (map == NULL) {
-        st->print_cr("Error: Cannot print dynamic libraries.");
-        return;
-    }
-
-    while (map->l_prev != NULL)
-        map = map->l_prev;
-
-    while (map != NULL) {
-        st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
-        map = map->l_next;
-    }
-
-    dlclose(handle);
+  Dl_info dli;
+  void *handle;
+  Link_map *map;
+  Link_map *p;
+
+  st->print_cr("Dynamic libraries:"); st->flush();
+
+  if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 ||
+      dli.dli_fname == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+  handle = dlopen(dli.dli_fname, RTLD_LAZY);
+  if (handle == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+  dlinfo(handle, RTLD_DI_LINKMAP, &map);
+  if (map == NULL) {
+    st->print_cr("Error: Cannot print dynamic libraries.");
+    return;
+  }
+
+  while (map->l_prev != NULL)
+    map = map->l_prev;
+
+  while (map != NULL) {
+    st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
+    map = map->l_next;
+  }
+
+  dlclose(handle);
 }
 
   // Loads .dll/.so and
@@ -2475,7 +2495,12 @@
   Dl_info dlinfo;
   int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
   assert(ret != 0, "cannot locate libjvm");
-  realpath((char *)dlinfo.dli_fname, buf);
+  if (ret != 0 && dlinfo.dli_fname != NULL) {
+    realpath((char *)dlinfo.dli_fname, buf);
+  } else {
+    buf[0] = '\0';
+    return;
+  }
 
   if (Arguments::created_by_gamma_launcher()) {
     // Support for the gamma launcher.  Typical value for buf is
@@ -6077,24 +6102,20 @@
 bool os::find(address addr, outputStream* st) {
   Dl_info dlinfo;
   memset(&dlinfo, 0, sizeof(dlinfo));
-  if (dladdr(addr, &dlinfo)) {
-#ifdef _LP64
-    st->print("0x%016lx: ", addr);
-#else
-    st->print("0x%08x: ", addr);
-#endif
-    if (dlinfo.dli_sname != NULL)
+  if (dladdr(addr, &dlinfo) != 0) {
+    st->print(PTR_FORMAT ": ", addr);
+    if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
       st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
-    else if (dlinfo.dli_fname)
+    } else if (dlinfo.dli_fbase != NULL)
       st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
     else
       st->print("<absolute address>");
-    if (dlinfo.dli_fname)  st->print(" in %s", dlinfo.dli_fname);
-#ifdef _LP64
-    if (dlinfo.dli_fbase)  st->print(" at 0x%016lx", dlinfo.dli_fbase);
-#else
-    if (dlinfo.dli_fbase)  st->print(" at 0x%08x", dlinfo.dli_fbase);
-#endif
+    if (dlinfo.dli_fname != NULL) {
+      st->print(" in %s", dlinfo.dli_fname);
+    }
+    if (dlinfo.dli_fbase != NULL) {
+      st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
+    }
     st->cr();
 
     if (Verbose) {
@@ -6105,7 +6126,7 @@
       if (!lowest)  lowest = (address) dlinfo.dli_fbase;
       if (begin < lowest)  begin = lowest;
       Dl_info dlinfo2;
-      if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
+      if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
           && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
         end = (address) dlinfo2.dli_saddr;
       Disassembler::decode(begin, end, st);

--- a/hotspot/src/os/windows/vm/os_windows.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/windows/vm/os_windows.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1420,34 +1420,40 @@
 
 bool os::dll_address_to_library_name(address addr, char* buf,
                                      int buflen, int* offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
 //       return the full path to the DLL file, sometimes it returns path
 //       to the corresponding PDB file (debug info); sometimes it only
 //       returns partial path, which makes life painful.
 
-   struct _modinfo mi;
-   mi.addr      = addr;
-   mi.full_path = buf;
-   mi.buflen    = buflen;
-   int pid = os::current_process_id();
-   if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
-      // buf already contains path name
-      if (offset) *offset = addr - mi.base_addr;
-      return true;
-   } else {
-      if (buf) buf[0] = '\0';
-      if (offset) *offset = -1;
-      return false;
-   }
+  struct _modinfo mi;
+  mi.addr      = addr;
+  mi.full_path = buf;
+  mi.buflen    = buflen;
+  int pid = os::current_process_id();
+  if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
+    // buf already contains path name
+    if (offset) *offset = addr - mi.base_addr;
+    return true;
+  }
+
+  buf[0] = '\0';
+  if (offset) *offset = -1;
+  return false;
 }
 
 bool os::dll_address_to_function_name(address addr, char *buf,
                                       int buflen, int *offset) {
+  // buf is not optional, but offset is optional
+  assert(buf != NULL, "sanity check");
+
   if (Decoder::decode(addr, buf, buflen, offset)) {
     return true;
   }
   if (offset != NULL)  *offset  = -1;
-  if (buf != NULL) buf[0] = '\0';
+  buf[0] = '\0';
   return false;
 }
 
@@ -2689,6 +2695,19 @@
 }
 #endif
 
+#ifndef PRODUCT
+void os::win32::call_test_func_with_wrapper(void (*funcPtr)(void)) {
+  // Install a win32 structured exception handler around the test
+  // function call so the VM can generate an error dump if needed.
+  __try {
+    (*funcPtr)();
+  } __except(topLevelExceptionFilter(
+             (_EXCEPTION_POINTERS*)_exception_info())) {
+    // Nothing to do.
+  }
+}
+#endif
+
 // Virtual Memory
 
 int os::vm_page_size() { return os::win32::vm_page_size(); }

--- a/hotspot/src/os/windows/vm/os_windows.hpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/windows/vm/os_windows.hpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -94,6 +94,10 @@
   static address fast_jni_accessor_wrapper(BasicType);
 #endif
 
+#ifndef PRODUCT
+  static void call_test_func_with_wrapper(void (*funcPtr)(void));
+#endif
+
   // filter function to ignore faults on serializations page
   static LONG WINAPI serialize_fault_filter(struct _EXCEPTION_POINTERS* e);
 };

--- a/hotspot/src/os/windows/vm/os_windows.inline.hpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/os/windows/vm/os_windows.inline.hpp	Thu Jul 04 21:10:17 2013 -0700
@@ -106,4 +106,10 @@
 inline int os::close(int fd) {
   return ::close(fd);
 }
+
+#ifndef PRODUCT
+  #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) \
+            os::win32::call_test_func_with_wrapper(f)
+#endif
+
 #endif // OS_WINDOWS_VM_OS_WINDOWS_INLINE_HPP

--- a/hotspot/src/share/vm/prims/jni.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/share/vm/prims/jni.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -5138,9 +5138,21 @@
       event.commit();
     }
 
+#ifndef PRODUCT
+  #ifndef TARGET_OS_FAMILY_windows
+    #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f()
+  #endif
+
     // Check if we should compile all classes on bootclasspath
-    NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();)
-    NOT_PRODUCT(if (ReplayCompiles) ciReplay::replay(thread);)
+    if (CompileTheWorld) ClassLoader::compile_the_world();
+    if (ReplayCompiles) ciReplay::replay(thread);
+
+    // Some platforms (like Win*) need a wrapper around these test
+    // functions in order to properly handle error conditions.
+    CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler);
+    CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests);
+#endif
+
     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
   } else {
@@ -5157,8 +5169,6 @@
     OrderAccess::release_store(&vm_created, 0);
   }
 
-  NOT_PRODUCT(test_error_handler(ErrorHandlerTest));
-  NOT_PRODUCT(execute_internal_vm_tests());
   return result;
 }
 

--- a/hotspot/src/share/vm/runtime/os.hpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/share/vm/runtime/os.hpp	Thu Jul 04 21:10:17 2013 -0700
@@ -507,16 +507,16 @@
 
   // Symbol lookup, find nearest function name; basically it implements
   // dladdr() for all platforms. Name of the nearest function is copied
-  // to buf. Distance from its base address is returned as offset.
+  // to buf. Distance from its base address is optionally returned as offset.
   // If function name is not found, buf[0] is set to '\0' and offset is
-  // set to -1.
+  // set to -1 (if offset is non-NULL).
   static bool dll_address_to_function_name(address addr, char* buf,
                                            int buflen, int* offset);
 
   // Locate DLL/DSO. On success, full path of the library is copied to
-  // buf, and offset is set to be the distance between addr and the
-  // library's base address. On failure, buf[0] is set to '\0' and
-  // offset is set to -1.
+  // buf, and offset is optionally set to be the distance between addr
+  // and the library's base address. On failure, buf[0] is set to '\0'
+  // and offset is set to -1 (if offset is non-NULL).
   static bool dll_address_to_library_name(address addr, char* buf,
                                           int buflen, int* offset);
 

--- a/hotspot/src/share/vm/utilities/debug.cpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/share/vm/utilities/debug.cpp	Thu Jul 04 21:10:17 2013 -0700
@@ -314,8 +314,8 @@
 #ifndef PRODUCT
 #include <signal.h>
 
-void test_error_handler(size_t test_num)
-{
+void test_error_handler() {
+  uintx test_num = ErrorHandlerTest;
   if (test_num == 0) return;
 
   // If asserts are disabled, use the corresponding guarantee instead.
@@ -327,6 +327,8 @@
 
   const char* const eol = os::line_separator();
   const char* const msg = "this message should be truncated during formatting";
+  char * const dataPtr = NULL;  // bad data pointer
+  const void (*funcPtr)(void) = (const void(*)()) 0xF;  // bad function pointer
 
   // Keep this in sync with test/runtime/6888954/vmerrors.sh.
   switch (n) {
@@ -348,11 +350,16 @@
     case  9: ShouldNotCallThis();
     case 10: ShouldNotReachHere();
     case 11: Unimplemented();
-    // This is last because it does not generate an hs_err* file on Windows.
-    case 12: os::signal_raise(SIGSEGV);
+    // There's no guarantee the bad data pointer will crash us
+    // so "break" out to the ShouldNotReachHere().
+    case 12: *dataPtr = '\0'; break;
+    // There's no guarantee the bad function pointer will crash us
+    // so "break" out to the ShouldNotReachHere().
+    case 13: (*funcPtr)(); break;
 
-    default: ShouldNotReachHere();
+    default: tty->print_cr("ERROR: %d: unexpected test_num value.", n);
   }
+  ShouldNotReachHere();
 }
 #endif // !PRODUCT
 

--- a/hotspot/src/share/vm/utilities/debug.hpp	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/src/share/vm/utilities/debug.hpp	Thu Jul 04 21:10:17 2013 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -243,7 +243,7 @@
 void set_error_reported();
 
 /* Test assert(), fatal(), guarantee(), etc. */
-NOT_PRODUCT(void test_error_handler(size_t test_num);)
+NOT_PRODUCT(void test_error_handler();)
 
 void pd_ps(frame f);
 void pd_obfuscate_location(char *buf, size_t buflen);

--- a/hotspot/test/runtime/6888954/vmerrors.sh	Thu Jul 04 04:03:28 2013 -0700
+++ b/hotspot/test/runtime/6888954/vmerrors.sh	Thu Jul 04 21:10:17 2013 -0700
@@ -1,5 +1,6 @@
 # @test
 # @bug 6888954
+# @bug 8015884
 # @summary exercise HotSpot error handling code
 # @author John Coomes
 # @run shell vmerrors.sh
@@ -27,9 +28,24 @@
 rc=0
 
 assert_re='(assert|guarantee)[(](str|num).*failed: *'
+# for bad_data_ptr_re:
+# EXCEPTION_ACCESS_VIOLATION - Win-*
+# SIGILL - MacOS X
+# SIGSEGV - Linux-*, Solaris SPARC-*, Solaris X86-*
+#
+bad_data_ptr_re='(SIGILL|SIGSEGV|EXCEPTION_ACCESS_VIOLATION).* at pc='
+#
+# for bad_func_ptr_re:
+# EXCEPTION_ACCESS_VIOLATION - Win-*
+# SIGBUS - Solaris SPARC-64
+# SIGSEGV - Linux-*, Solaris SPARC-32, Solaris X86-*
+#
+# Note: would like to use "pc=0x00*0f," in the pattern, but Solaris SPARC-*
+# gets its signal at a PC in test_error_handler().
+#
+bad_func_ptr_re='(SIGBUS|SIGSEGV|EXCEPTION_ACCESS_VIOLATION).* at pc='
 guarantee_re='guarantee[(](str|num).*failed: *'
 fatal_re='fatal error: *'
-signal_re='(SIGSEGV|EXCEPTION_ACCESS_VIOLATION).* at pc='
 tail_1='.*expected null'
 tail_2='.*num='
 
@@ -39,8 +55,9 @@
     "${fatal_re}${tail_1}"     "${fatal_re}${tail_2}"     \
     "${fatal_re}.*truncated"   "ChunkPool::allocate"      \
     "ShouldNotCall"            "ShouldNotReachHere"       \
-    "Unimplemented"            "$signal_re"
-    
+    "Unimplemented"            "$bad_data_ptr_re"         \
+    "$bad_func_ptr_re"
+
 do
     i2=$i
     [ $i -lt 10 ] && i2=0$i