gecko/memory/jemalloc/update.sh
Mike Hommey cf7eaf9fec Bug 1121314 - Avoid needing the arena in chunk_alloc_default to avoid possible infinite loops involving a0malloc. r=njn
The infinite loop happens if chunk_alloc_arena needs to be called when a0malloc
is called. It in turn calls chunk_alloc_default, which uses tsd, which calls
a0malloc if it's the first time the tsd is being gotten from the current thread.
tsd only uses a0malloc on platforms where there is no native thread local storage
support, which, for Mozilla, essentially means anything that is not Linux.

But the tsd is only neededto get the dss precedence setting of the given arena.
That setting has no effect when dss is disabled, which it is on Windows and Mac.

Moreover, the default setting for dss precedence is "secondary", which means
jemalloc only tries dss after it failed to get memory with mmap/VirtualAlloc.
Considering the cases where mmap/VirtualAlloc would fail essentially means
there is shortage of address space, sbrk() is not going to have much more
success, so we might as well disable dss support on all platforms, avoiding
the infinite loop problem on Android and B2G as well.
2015-01-14 15:18:49 +09:00

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#!/bin/bash
set -e
cd `dirname $0`
source upstream.info
rm -rf src
git clone "$UPSTREAM_REPO" src
cd src
git checkout "$UPSTREAM_COMMIT"
autoconf
git describe --long --abbrev=40 > VERSION
rm -rf .git .gitignore .gitattributes autom4te.cache .autom4te.cfg
patch -p1 < ../0001-Dont-overwrite-VERSION-on-a-git-repository.patch
patch -p1 < ../0002-Move-variable-declaration-to-the-top-its-block-for-M.patch
patch -p1 < ../0003-Add-a-isblank-definition-for-MSVC-2013.patch
patch -p1 < ../0004-Implement-stats.bookkeeping.patch
patch -p1 < ../0005-Bug-1121314-Avoid-needing-the-arena-in-chunk_alloc_d.patch
cd ..
hg addremove -q src
echo "jemalloc has now been updated. Don't forget to run hg commit!"