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comparison src/share/vm/prims/jni.cpp @ 1078:8e7adf982378

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6896043: first round of zero fixes Reviewed-by: kvn Contributed-by: Gary Benson <gbenson@redhat.com>
author twisti
date Fri, 27 Nov 2009 07:56:58 -0800
parents 08780c8a9f04
children 896da934748c
comparison
equal deleted inserted replaced
1073:de44705e6b33 1078:8e7adf982378
3229 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args); 3229 HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args);
3230 3230
3231 jint result = JNI_ERR; 3231 jint result = JNI_ERR;
3232 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result); 3232 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3233 3233
3234 // We're about to use Atomic::xchg for synchronization. Some Zero
3235 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3236 // but __sync_lock_test_and_set is not guaranteed to do what we want
3237 // on all architectures. So we check it works before relying on it.
3238 #if defined(ZERO) && defined(ASSERT)
3239 {
3240 jint a = 0xcafebabe;
3241 jint b = Atomic::xchg(0xdeadbeef, &a);
3242 void *c = &a;
3243 void *d = Atomic::xchg_ptr(&b, &c);
3244 assert(a == 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3245 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3246 }
3247 #endif // ZERO && ASSERT
3248
3234 // At the moment it's only possible to have one Java VM, 3249 // At the moment it's only possible to have one Java VM,
3235 // since some of the runtime state is in global variables. 3250 // since some of the runtime state is in global variables.
3236 3251
3237 // We cannot use our mutex locks here, since they only work on 3252 // We cannot use our mutex locks here, since they only work on
3238 // Threads. We do an atomic compare and exchange to ensure only 3253 // Threads. We do an atomic compare and exchange to ensure only