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Write snapshot by chunks in ProfilingCompilerPerformanceManager.dumpProfile

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To prevent OutOfMemoryError from converting the whole string to byte
array, in case the snapshot is very big (see KT-51058).

Also, remove 'framebuf' option from -Xprofile help, since async-profiler
2.0+ has unlimited frame buffer.
This commit is contained in:
Alexander Udalov
2022-01-24 16:23:16 +01:00
parent 392ab75bee
commit 6601b8b62c
3 changed files with 10 additions and 4 deletions
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compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.kt
+1 -1
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@@ -446,7 +446,7 @@ Also sets `-jvm-target` value equal to the selected JDK version"""
description = "Debug option: Run compiler with async profiler and save snapshots to `outputDir`; `command` is passed to async-profiler on start.\n" +
"`profilerPath` is a path to libasyncProfiler.so; async-profiler.jar should be on the compiler classpath.\n" +
"If it's not on the classpath, the compiler will attempt to load async-profiler.jar from the containing directory of profilerPath.\n" +
"Example: -Xprofile=<PATH_TO_ASYNC_PROFILER>/async-profiler/build/libasyncProfiler.so:event=cpu,interval=1ms,threads,start,framebuf=50000000:<SNAPSHOT_DIR_PATH>"
"Example: -Xprofile=<PATH_TO_ASYNC_PROFILER>/async-profiler/build/libasyncProfiler.so:event=cpu,interval=1ms,threads,start:<SNAPSHOT_DIR_PATH>"
)
var profileCompilerCommand: String? by NullableStringFreezableVar(null)