975138 - Differential Testing: Different output message involving --ion-eager verbose output on asmbuffer repo

Status: RESOLVED FIXED

(Core :: JavaScript Engine: JIT, defect)

Description

[Gary Kwong [:gkw] [:nth10sd] (NOT official MoCo now)]

gc()

shows the following with --fuzzing-safe --ion-parallel-compile=off --ion-eager:

buffer is: 0xb631fad0
found offset was: 124
found offset was: 208

but does not show anything with --fuzzing-safe --ion-parallel-compile=off.

Tested on js debug shell on asmbuffer changeset fadec62359d5.

This throws up a lot of false positive mismatches.

My configure flags are:

CC="gcc -mfloat-abi=softfp -B/usr/lib/gcc/arm-linux-gnueabi/4.7" AR=ar CXX="g++ -mfloat-abi=softfp -B/usr/lib/gcc/arm-linux-gnueabi/4.7" sh ./configure --target=arm-linux-gnueabi --enable-optimize --enable-debug --enable-profiling --enable-gczeal --enable-debug-symbols --enable-methodjit --enable-type-inference --disable-tests --enable-more-deterministic --enable-exact-rooting --with-ccache --enable-threadsafe <other NSPR options>

Comment 1

[Gary Kwong [:gkw] [:nth10sd] (NOT official MoCo now)]

This mismatch does not seem to occur on Mac shells.

Comment 2

[Douglas Crosher [:dougc]]

Attachment: Remove some verbose debug output

Thank you for the report.  Trivial patch removes these.

Landed on asmbuffer user repo:
https://hg.mozilla.org/users/dtc-moz_scieneer.com/asmbuffer/rev/193e51ec366a