On Fri, 31 Mar 2023 11:18:23 GMT, Markus Grönlund wrote:
>> Greetings,
>>
>> We are adding support to let JFR report on Agents.
>>
>> Design
>>
>> An Agent is a library that uses any instrumentation or profiling APIs. Most
>> agents are started and initialized on the command line, but ag
On Wed, 22 Mar 2023 09:18:51 GMT, David Holmes wrote:
>> src/hotspot/share/prims/jvmtiEnvBase.hpp line 166:
>>
>>> 164:
>>> 165: const void* get_env_local_storage() { return _env_local_storage; }
>>> 166:
>>
>> Why was this change/move necessary? Do I miss anything?
>
> It is now public, no
On Fri, 17 Mar 2023 22:27:48 GMT, Justin Lu wrote:
>> This PR converts Unicode sequences to UTF-8 native in .properties file.
>> (Excluding the Unicode space and tab sequence). The conversion was done
>> using native2ascii.
>>
>> In addition, the build logic is adjusted to support reading in t
On Fri, 31 Mar 2023 07:25:48 GMT, Thomas Stuefe wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Use int instead of size_t for cached offsets, to match the uncached offset
>> type and avoid build failures
>
> src/h
On Fri, 31 Mar 2023 19:39:03 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
On Fri, 17 Mar 2023 22:27:48 GMT, Justin Lu wrote:
>> This PR converts Unicode sequences to UTF-8 native in .properties file.
>> (Excluding the Unicode space and tab sequence). The conversion was done
>> using native2ascii.
>>
>> In addition, the build logic is adjusted to support reading in t
On Fri, 31 Mar 2023 19:39:03 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
> The fix is to enable virtual threads support for late binding JVMTI agents.
> The fix includes:
> - New function `JvmtiEnvBase::enable_virtual_threads_notify_jvmti()` which
> does enabling JVMTI VTMS transition notifications in case of agent loaded
> into running VM. This function executes a VM
On Fri, 31 Mar 2023 06:52:18 GMT, Serguei Spitsyn wrote:
>> The fix is to enable virtual threads support for late binding JVMTI agents.
>> The fix includes:
>> - New function `JvmtiEnvBase::enable_virtual_threads_notify_jvmti()` which
>> does enabling JVMTI VTMS transition notifications in case
On Fri, 31 Mar 2023 19:39:03 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
On Fri, 31 Mar 2023 06:07:39 GMT, Julian Waters wrote:
> C11 has been stable for a long time on all platforms, so native code can use
> the standard alignas operator for alignment requirements
I don't have any comments on this change in general (it's not something I've
dealt with in the past),
On Fri, 31 Mar 2023 08:24:19 GMT, Kevin Walls wrote:
> The Permissions in DCmds relate to remote usage over JMX.
> "monitor" is generally for reading information, and "control" is generally
> for making changes.
> The DCmds for changing compiler directives should have "control" as the
> requir
> This change adds a fast-locking scheme as an alternative to the current
> stack-locking implementation. It retains the advantages of stack-locking
> (namely fast locking in uncontended code-paths), while avoiding the overload
> of the mark word. That overloading causes massive problems with Li
On Fri, 31 Mar 2023 06:52:18 GMT, Serguei Spitsyn wrote:
>> The fix is to enable virtual threads support for late binding JVMTI agents.
>> The fix includes:
>> - New function `JvmtiEnvBase::enable_virtual_threads_notify_jvmti()` which
>> does enabling JVMTI VTMS transition notifications in case
On Fri, 31 Mar 2023 13:54:47 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
On Fri, 31 Mar 2023 15:24:07 GMT, Thomas Stuefe wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Merge remote-tracking branch 'origin/JDK-8291555-v2' into JDK-8291555-v2
>> - Check underflow, top-of-stack and mar
On Tue, 28 Mar 2023 19:50:36 GMT, Matias Saavedra Silva
wrote:
>> The current structure used to store the resolution information for
>> invokedynamic, ConstantPoolCacheEntry, is difficult to interpret due to its
>> ambigious fields f1 and f2. This structure can hold information for fields,
>>
On Fri, 31 Mar 2023 13:54:47 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
On Tue, 28 Mar 2023 19:50:36 GMT, Matias Saavedra Silva
wrote:
>> The current structure used to store the resolution information for
>> invokedynamic, ConstantPoolCacheEntry, is difficult to interpret due to its
>> ambigious fields f1 and f2. This structure can hold information for fields,
>>
On Tue, 28 Mar 2023 19:50:36 GMT, Matias Saavedra Silva
wrote:
>> The current structure used to store the resolution information for
>> invokedynamic, ConstantPoolCacheEntry, is difficult to interpret due to its
>> ambigious fields f1 and f2. This structure can hold information for fields,
>>
> This change adds a fast-locking scheme as an alternative to the current
> stack-locking implementation. It retains the advantages of stack-locking
> (namely fast locking in uncontended code-paths), while avoiding the overload
> of the mark word. That overloading causes massive problems with Li
On Fri, 31 Mar 2023 03:05:31 GMT, David Holmes wrote:
>> Markus Grönlund has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> restore misssing frees
>
> src/hotspot/share/prims/agent.cpp line 533:
>
>> 531: if (thread->is_pending_jni_exc
> Greetings,
>
> We are adding support to let JFR report on Agents.
>
> Design
>
> An Agent is a library that uses any instrumentation or profiling APIs. Most
> agents are started and initialized on the command line, but agents can also
> be loaded dynamically during runtime. Because comm
> JEP 444 proposes to make virtual threads a permanent feature in Java 21. The
> APIs that were preview APIs in Java 19/20 are changed to permanent and their
> `@since`/equivalent are changed to 21 (as per the guidance in JEP 12). The
> JNI and JVMTI versions are bumped as this is the first chan
On Fri, 31 Mar 2023 08:24:19 GMT, Kevin Walls wrote:
> The Permissions in DCmds relate to remote usage over JMX.
> "monitor" is generally for reading information, and "control" is generally
> for making changes.
> The DCmds for changing compiler directives should have "control" as the
> requir
The Permissions in DCmds relate to remote usage over JMX.
"monitor" is generally for reading information, and "control" is generally for
making changes.
The DCmds for changing compiler directives should have "control" as the
required permission.
Tests in test/hotspot/jtreg/serviceability/dcmd/c
On Fri, 31 Mar 2023 06:06:47 GMT, Roman Kennke wrote:
>> This change adds a fast-locking scheme as an alternative to the current
>> stack-locking implementation. It retains the advantages of stack-locking
>> (namely fast locking in uncontended code-paths), while avoiding the overload
>> of the
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