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The current stack depth limit for alloc, mutex, block, threadcreate and goroutine profiles of 32 frequently leads to truncated stack traces in production applications. Increase the limit to 128 which is the same size used by the execution tracer. Create internal/profilerecord to define variants of the runtime's StackRecord, MemProfileRecord and BlockProfileRecord types that can hold arbitrarily big stack traces. Implement internal profiling APIs based on these new types and use them for creating protobuf profiles and to act as shims for the public profiling APIs using the old types. This will lead to an increase in memory usage for applications that use the impacted profile types and have stack traces exceeding the current limit of 32. Those applications will also experience a slight increase in CPU usage, but this will hopefully soon be mitigated via CL 540476 and 533258 which introduce frame pointer unwinding for the relevant profile types. For #43669. Change-Id: Ie53762e65d0f6295f5d4c7d3c87172d5a052164e Reviewed-on: https://go-review.googlesource.com/c/go/+/572396 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
124 B
124 B
The maximum stack depth for alloc, mutex, block, threadcreate and goroutine profiles has been raised from 32 to 128 frames.