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8150353: PPC64LE: Support RTM on linux

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Reviewed-by: mdoerr, kvn
This commit is contained in:
Gustavo Romero 2016-03-07 10:03:06 -03:00 • committed by Vladimir Kozlov
parent 77c73b6d4f
commit 1c2427a182
5 changed files with 73 additions and 2 deletions
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45
hotspot/src/os/linux/vm/os_linux.cpp
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@ -144,6 +144,7 @@ pthread_t os::Linux::_main_thread;
int os::Linux::_page_size = -1;
const int os::Linux::_vm_default_page_size = (8 * K);
bool os::Linux::_supports_fast_thread_cpu_time = false;
uint32_t os::Linux::_os_version = 0;
const char * os::Linux::_glibc_version = NULL;
const char * os::Linux::_libpthread_version = NULL;
pthread_condattr_t os::Linux::_condattr[1];
@ -4356,6 +4357,48 @@ jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) {
return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec;
}
void os::Linux::initialize_os_info() {
assert(_os_version == 0, "OS info already initialized");
struct utsname _uname;
uint32_t major;
uint32_t minor;
uint32_t fix;
int rc;
// Kernel version is unknown if
// verification below fails.
_os_version = 0x01000000;
rc = uname(&_uname);
if (rc != -1) {
rc = sscanf(_uname.release,"%d.%d.%d", &major, &minor, &fix);
if (rc == 3) {
if (major < 256 && minor < 256 && fix < 256) {
// Kernel version format is as expected,
// set it overriding unknown state.
_os_version = (major << 16) |
(minor << 8 ) |
(fix << 0 ) ;
}
}
}
}
uint32_t os::Linux::os_version() {
assert(_os_version != 0, "not initialized");
return _os_version & 0x00FFFFFF;
}
bool os::Linux::os_version_is_known() {
assert(_os_version != 0, "not initialized");
return _os_version & 0x01000000 ? false : true;
}
/////
// glibc on Linux platform uses non-documented flag
// to indicate, that some special sort of signal
@ -4578,6 +4621,8 @@ void os::init(void) {
Linux::initialize_system_info();
Linux::initialize_os_info();
// main_thread points to the aboriginal thread
Linux::_main_thread = pthread_self();