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Commit 64bee4de authored by Evgenii Stepanov's avatar Evgenii Stepanov
Browse files

Add -instcombine-lower-dbg-declare to hwasan flags. 

This is a workaround to improve hwasan reports involving stack
variables.

Bug: 112437883
Test: SANITIZE_TARGET=hwaddress, build and boot

Change-Id: I21ea2fdd2d1f04e2bb9b9847785c00a951030c74
parent 3ea15b5a

cc/sanitize.go

+10 −1
Original line number Diff line number Diff line
@@ -39,7 +39,16 @@ var ( 


	hwasanCflags = []string{"-fno-omit-frame-pointer", "-Wno-frame-larger-than=",

		"-fsanitize-hwaddress-abi=platform",

		"-fno-experimental-new-pass-manager"}

		"-fno-experimental-new-pass-manager",

		// The following improves debug location information

		// availability at the cost of its accuracy. It increases

		// the likelihood of a stack variable's frame offset

		// to be recorded in the debug info, which is important

		// for the quality of hwasan reports. The downside is a

		// higher number of "optimized out" stack variables.

		// b/112437883.

		"-mllvm", "-instcombine-lower-dbg-declare=0",

	}



	cfiCflags = []string{"-flto", "-fsanitize-cfi-cross-dso",

		"-fsanitize-blacklist=external/compiler-rt/lib/cfi/cfi_blacklist.txt"}