fix bug: get return type in a wrong way for method instrumentation

[darcydai]

After testing, @Advice.Origin("#r") can only insert a string type parameter from the constant pool.
@Advice.Origin("#r") Class<?> returnType: returnType is current class for method

[linux-foundation-easycla]

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• ✅ login: darcydai / name: Darcy (6ff3d4d)

[laurit]

@darcydai could you add a test for this?

[darcydai]

@darcydai could you add a test for this?

yes, later

[darcydai]

@darcydai could you add a test for this?

it is hard to approve @Advice.Origin("#r") Class<?> returnType is the wrong way to get the return type by a test case,because this is bytebuddy feature.
I wrote a test case that use @Advice.Origin("#r") Class<?> returnType can not pass.

[laurit]

@darcydai I created a pull request darcydai#1 for your pull request. I moved the new test into a separate method and instead of figuring out from span length checked directly whether span was still running after the method completed. WDYT?

[darcydai]

WDYT

wow, that is more graceful than mine

[darcydai]

@darcydai I created a pull request darcydai#1 for your pull request. I moved the new test into a separate method and instead of figuring out from span length checked directly whether span was still running after the method completed. WDYT?

I have merged your pull request

[trask]

thx!