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comparison src/os/linux/vm/os_linux.cpp @ 2191:d70fe6ab4436

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6588413: Use -fvisibility=hidden for gcc compiles Summary: Add option for gcc 4 and above, define JNIEXPORT and JNIIMPORT to visibility=default, add for jio_snprintf and others since -fvisibility=hidden overrides --version-script definitions. Reviewed-by: kamg, never
author coleenp
date Tue, 01 Feb 2011 11:23:19 -0500
parents 34d64ad817f4
children 9cd8a2c2d584
comparison
equal deleted inserted replaced
2177:3582bf76420e 2191:d70fe6ab4436
2507 2507
2508 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2508 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2509 return end; 2509 return end;
2510 } 2510 }
2511 2511
2512 extern "C" void numa_warn(int number, char *where, ...) { } 2512 // Something to do with the numa-aware allocator needs these symbols
2513 extern "C" void numa_error(char *where) { } 2513 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { }
2514 extern "C" JNIEXPORT void numa_error(char *where) { }
2515 extern "C" JNIEXPORT int fork1() { return fork(); }
2514 2516
2515 2517
2516 // If we are running with libnuma version > 2, then we should 2518 // If we are running with libnuma version > 2, then we should
2517 // be trying to use symbols with versions 1.1 2519 // be trying to use symbols with versions 1.1
2518 // If we are running with earlier version, which did not have symbol versions, 2520 // If we are running with earlier version, which did not have symbol versions,
3481 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3483 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3482 // 3484 //
3483 // Note that the VM will print warnings if it detects conflicting signal 3485 // Note that the VM will print warnings if it detects conflicting signal
3484 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3486 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3485 // 3487 //
3486 extern "C" int 3488 extern "C" JNIEXPORT int
3487 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, 3489 JVM_handle_linux_signal(int signo, siginfo_t* siginfo,
3488 void* ucontext, int abort_if_unrecognized); 3490 void* ucontext, int abort_if_unrecognized);
3489 3491
3490 void signalHandler(int sig, siginfo_t* info, void* uc) { 3492 void signalHandler(int sig, siginfo_t* info, void* uc) {
3491 assert(info != NULL && uc != NULL, "it must be old kernel"); 3493 assert(info != NULL && uc != NULL, "it must be old kernel");
4676 jio_fprintf(stderr, 4678 jio_fprintf(stderr,
4677 "Could not open pause file '%s', continuing immediately.\n", filename); 4679 "Could not open pause file '%s', continuing immediately.\n", filename);
4678 } 4680 }
4679 } 4681 }
4680 4682
4681 extern "C" {
4682
4683 /**
4684 * NOTE: the following code is to keep the green threads code
4685 * in the libjava.so happy. Once the green threads is removed,
4686 * these code will no longer be needed.
4687 */
4688 int
4689 jdk_waitpid(pid_t pid, int* status, int options) {
4690 return waitpid(pid, status, options);
4691 }
4692
4693 int
4694 fork1() {
4695 return fork();
4696 }
4697
4698 int
4699 jdk_sem_init(sem_t *sem, int pshared, unsigned int value) {
4700 return sem_init(sem, pshared, value);
4701 }
4702
4703 int
4704 jdk_sem_post(sem_t *sem) {
4705 return sem_post(sem);
4706 }
4707
4708 int
4709 jdk_sem_wait(sem_t *sem) {
4710 return sem_wait(sem);
4711 }
4712
4713 int
4714 jdk_pthread_sigmask(int how , const sigset_t* newmask, sigset_t* oldmask) {
4715 return pthread_sigmask(how , newmask, oldmask);
4716 }
4717
4718 }
4719 4683
4720 // Refer to the comments in os_solaris.cpp park-unpark. 4684 // Refer to the comments in os_solaris.cpp park-unpark.
4721 // 4685 //
4722 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can 4686 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can
4723 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. 4687 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable.