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8293197: Avoid double racy reads from non-volatile fields in SharedSecrets

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Reviewed-by: alanb
This commit is contained in:
Andrey Turbanov 2022-09-07 06:11:56 +00:00
parent 205f992e9e
commit 2259e427a5
1 changed files with 16 additions and 8 deletions
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24
src/java.base/share/classes/jdk/internal/access/SharedSecrets.java
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@ -108,12 +108,14 @@ public class SharedSecrets {
}
public static JavaUtilConcurrentTLRAccess getJavaUtilConcurrentTLRAccess() {
if (javaUtilConcurrentTLRAccess == null) {
var access = javaUtilConcurrentTLRAccess;
if (access == null) {
try {
Class.forName("java.util.concurrent.ThreadLocalRandom$Access", true, null);
access = javaUtilConcurrentTLRAccess;
} catch (ClassNotFoundException e) {}
}
return javaUtilConcurrentTLRAccess;
return access;
}
public static void setJavaUtilConcurrentFJPAccess(JavaUtilConcurrentFJPAccess access) {
@ -121,10 +123,12 @@ public class SharedSecrets {
}
public static JavaUtilConcurrentFJPAccess getJavaUtilConcurrentFJPAccess() {
if (javaUtilConcurrentFJPAccess == null) {
var access = javaUtilConcurrentFJPAccess;
if (access == null) {
ensureClassInitialized(ForkJoinPool.class);
access = javaUtilConcurrentFJPAccess;
}
return javaUtilConcurrentFJPAccess;
return access;
}
public static JavaUtilJarAccess javaUtilJarAccess() {
@ -463,10 +467,12 @@ public class SharedSecrets {
}
public static JavaSecuritySpecAccess getJavaSecuritySpecAccess() {
if (javaSecuritySpecAccess == null) {
var access = javaSecuritySpecAccess;
if (access == null) {
ensureClassInitialized(EncodedKeySpec.class);
access = javaSecuritySpecAccess;
}
return javaSecuritySpecAccess;
return access;
}
public static void setJavaxCryptoSpecAccess(JavaxCryptoSpecAccess jcsa) {
@ -474,10 +480,12 @@ public class SharedSecrets {
}
public static JavaxCryptoSpecAccess getJavaxCryptoSpecAccess() {
if (javaxCryptoSpecAccess == null) {
var access = javaxCryptoSpecAccess;
if (access == null) {
ensureClassInitialized(SecretKeySpec.class);
access = javaxCryptoSpecAccess;
}
return javaxCryptoSpecAccess;
return access;
}
public static void setJavaxCryptoSealedObjectAccess(JavaxCryptoSealedObjectAccess jcsoa) {