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Bug 623392 - dev-lang/spidermonkey-1.8.5-r6: Numeric operations broken on 64-bit big endian
Summary: dev-lang/spidermonkey-1.8.5-r6: Numeric operations broken on 64-bit big endian
Status: UNCONFIRMED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: PPC64 Linux
: Normal normal (vote)
Assignee: Mozilla Gentoo Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-07-01 21:46 UTC by Marcus Comstedt
Modified: 2017-07-02 18:57 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


Attachments
Proposed fix (jsval-be64.patch,506 bytes, patch)
2017-07-01 21:47 UTC, Marcus Comstedt
Details | Diff

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Description Marcus Comstedt 2017-07-01 21:46:24 UTC
In several places (such as in INT32_TO_JSVAL_IMPL), the code for JS_BITS_PER_WORD == 64 assumes that 32 bit entries in the payload union of jsval_layout overlaps the _lower_ 32 bits of the asBits field.  However, the way jsval_layout is defined on 64-bit big endian systems makes it overlap the _upper_ 32 bits, which leads to erroneous results.  For example, using "++" on an integer does not work correctly.  This breaks polkit, by the way...

Reproducible: Always

Steps to Reproduce:
On a 64-bit big endian system with spidermonkey 1.8.5-r6, run

   js -e 'var n=0; n++; this.print("n="+n);'

Actual Results:  
  n=2.121995791e-314

is printed

Expected Results:  
  n=1

is printed

Portage 2.3.6 (python 3.4.5-final-0, default/linux/powerpc/ppc64/13.0/64bit-userland/desktop, gcc-4.9.4, glibc-2.23-r4, 4.10.10-X5000 ppc64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-4.10.10-X5000-ppc64-e5500-with-gentoo-2.3
KiB Mem:    16383416 total,  10348304 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Fri, 30 Jun 2017 19:00:01 +0000
sh bash 4.3_p48-r1
ld GNU ld (Gentoo 2.26.1 p1.0) 2.26.1
app-shells/bash:          4.3_p48-r1::gentoo
dev-java/java-config:     2.2.0-r3::gentoo
dev-lang/perl:            5.24.1-r2::gentoo
dev-lang/python:          2.7.12::gentoo, 3.4.5::gentoo, 3.5.3::gentoo
dev-util/cmake:           3.7.2::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.3::gentoo
sys-apps/openrc:          0.26.3::gentoo
sys-apps/sandbox:         2.10-r3::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69::gentoo
sys-devel/automake:       1.11.6-r1::gentoo, 1.15-r2::gentoo
sys-devel/binutils:       2.26.1::gentoo, 2.28-r2::gentoo
sys-devel/gcc:            4.9.4::gentoo, 5.4.0-r3::gentoo
sys-devel/gcc-config:     1.7.3::gentoo
sys-devel/libtool:        2.4.6-r3::gentoo
sys-devel/make:           4.2.1::gentoo
sys-kernel/linux-headers: 4.4::gentoo (virtual/os-headers)
sys-libs/glibc:           2.23-r4::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://momoka/gentoo-portage
    priority: -1000

zeldin
    location: /usr/local/portage
    masters: gentoo

crossdev
    location: /usr/local/portage-crossdev
    masters: gentoo
    priority: 10

java
    location: /var/lib/layman/java
    masters: gentoo
    priority: 50

pike
    location: /var/lib/layman/pike
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="ppc64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="powerpc64-unknown-linux-gnu"
CFLAGS="-O2 -pipe -mcpu=e5500 -mno-altivec"
CHOST="powerpc64-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -pipe -mcpu=e5500 -mno-altivec"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="X a52 aac acl alsa berkdb bindist bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus dri dts dvd dvdr emboss encode exif fam firefox flac fortran gdbm gif glamor gpm gtk ibm iconv ipv6 jpeg lcms ldap libnotify mad mng modules mp3 mp4 mpeg ncurses nls nptl ogg opengl openmp pam pango pcre pdf png policykit ppc64 ppds qt3support qt4 readline sdl seccomp session spell ssl startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xattr xcb xml xv xvid zlib" ABI_PPC="64" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby21 ruby22" USERLAND="GNU" VIDEO_CARDS="fbdev mach64 mga nv r128 radeon dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, MAKEOPTS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

=================================================================
                        Package Settings
=================================================================

dev-lang/spidermonkey-1.8.5-r6::gentoo was built with the following:
USE="-debug -minimal -static-libs -test"
Comment 1 Marcus Comstedt 2017-07-01 21:47:34 UTC
Created attachment 479250 [details, diff]
Proposed fix