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Enable mini-debug-info for JITed methods by default. 

Generate and store minimum amount of information necessary to
create backtraces in native tools (for crashes and profilers).

The data is compressed and takes <5% relative to JIT code size
(which is less than recent stack map savings; so win overall).

Averages for non-compiled run of maps which filled JIT code cache to ~4MB:
Q: code:1.55kb/method data:0.738kb/method debug:0.064kb/method(*this CL*)
P: code:1.62kb/method data:0.956kb/method debug:0.835kb/method(if enabled)

I also measured the P to Q on-disk stack maps savings in CL/762841 as ~28%
(not all of that is applicable to JITed code, so that is an overestimate).

Bug: 111350693
Test: Device boots, mini-debug-info is generated.
Change-Id: I95883bd4f2d5c2308149ab0ba641b0a703c7f81b
This commit is contained in:
David Srbecky 2019-01-08 17:02:14 +00:00
parent 6dc878bd87
commit 99ae76e24a
1 changed files with 1 additions and 0 deletions
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1
target/product/runtime_libart.mk
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@ -100,4 +100,5 @@ PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
# Enable minidebuginfo generation unless overridden.
PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
dalvik.vm.minidebuginfo=true \
dalvik.vm.dex2oat-minidebuginfo=true