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8189941: Implementation JEP 312: Thread-local handshake

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Introduce a way to execute a callback on threads without performing a global VM safepoint. Make it both possible and cheap to stop individual threads and not just all threads or none.

Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Co-authored-by: Erik Osterlund <erik.osterlund@oracle.com>
Reviewed-by: mdoerr, neliasso, acorn, aph, coleenp, dholmes
This commit is contained in:
Robbin Ehn 2017-08-31 10:00:28 +02:00
parent fdee542113
commit 104ecb2dd1
73 changed files with 1847 additions and 325 deletions
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14
src/hotspot/os/linux/os_linux.cpp
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@ -4805,20 +4805,6 @@ jint os::init_2(void) {
Linux::fast_thread_clock_init();
// Allocate a single page and mark it as readable for safepoint polling
address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
guarantee(polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page");
os::set_polling_page(polling_page);
log_info(os)("SafePoint Polling address: " INTPTR_FORMAT, p2i(polling_page));
if (!UseMembar) {
address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
guarantee(mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page");
os::set_memory_serialize_page(mem_serialize_page);
log_info(os)("Memory Serialize Page address: " INTPTR_FORMAT, p2i(mem_serialize_page));
}
// initialize suspend/resume support - must do this before signal_sets_init()
if (SR_initialize() != 0) {
perror("SR_initialize failed");