RFR: 8364973: Add JVMTI stress testing mode

[Erik Joelsson]

On Thu, 17 Jul 2025 02:39:15 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

> The fix added JVMTI stress testing mode.
> 
> This mode enables stress agent that could be executed with jtreg test and help to ensure that jvmti functionality doesn't break the other JVM/JDK functionality.
> 
> I filed few issues and more are coming. I want to push the agent so it is possible to provide reproduces for problems uncovered by this agent.
> 
> The agent has 2 modes now:
>  - regular that is compatible with most of tests including other jvmti, jdi and jdb tests
>  - debugger, that additionally test some function requiring  solo capabilities and not compatible with debugger and some jvmti  tests 
> 
> The tests incompatible wiht agent (IR, CDS) and some individual tests from tier1 are excluded. There are not plans to support stable execution of all tests with agent right now. However it provokes some crashes worth to be used for exploratory testing.
> Note, that flagless tests are excluded automatically and not executed in this mode.

make/RunTests.gmk line 64:

> 62: 
> 63: AGENT_PREFIX := lib
> 64: AGENT_EXT := .so

We already have `LIBRARY_PREFIX` and `SHARED_LIBRARY_SUFFIX` defined in spec.gmk. To make those available in a test prebuilt scenario, they need to also be defined in RunTestPrebuiltSpec.gmk. Then you can use those instead of defining these.

make/RunTests.gmk line 215:

> 213: $(eval $(call ParseKeywordVariable, JTREG, \
> 214:     SINGLE_KEYWORDS := JOBS TIMEOUT_FACTOR FAILURE_HANDLER_TIMEOUT \
> 215:         TEST_MODE ASSERT VERBOSE RETAIN TEST_THREAD_FACTORY JVMTI_STRESS_AGENT MAX_MEM RUN_PROBLEM_LISTS \

Could you add this list element in a way that doesn't make the lines any longer?

make/RunTests.gmk line 892:

> 890:     $1_JTREG_BASIC_OPTIONS += $$(addprefix $$(JTREG_PROBLEM_LIST_PREFIX), $$(wildcard \
> 891: 	$$(addprefix $$($1_TEST_ROOT)/, ProblemList-jvmti-stress-agent.txt) \
> 892:     ))

Please use regular parentheses when referencing variables in makefiles.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26360#discussion_r2260294410
PR Review Comment: https://git.openjdk.org/jdk/pull/26360#discussion_r2260298782
PR Review Comment: https://git.openjdk.org/jdk/pull/26360#discussion_r2260294596