[9] RFR (XS): 8075266: Show runtime call details when printing machine code (original) (raw)

Vladimir Ivanov vladimir.x.ivanov at oracle.com
Mon Mar 16 19:10:04 UTC 2015

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http://cr.openjdk.java.net/~vlivanov/8075266/webrev.00/ https://bugs.openjdk.java.net/browse/JDK-8075266

Small enhancement to make generated assembly output more descriptive: print code blob name runtime call points to.

Examples:

• {runtime_call ic_miss_stub}

• ; OopMap{[16]=NarrowOop off=348} ;*if_icmpne ; - java.lang.String::indexOf at 49 (line 1562) ; {runtime_call UncommonTrapBlob}

• {runtime_call DeoptimizationBlob}

Testing: manual (looked at -XX:+PrintAssembly output).

Best regards, Vladimir Ivanov

PS: I considered adding a special case for os::breakpoint (debug builds insert such calls everywhere, but I didn't want to enumerate symbols to decode arbitrary functions), but decided it doesn't add much. Let me know if you think it is useful.

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