k0kubun bdb4268928 _mjit_compile_pc_and_sp.erb: make sure no uninitialized ... area on VM stack to prevent SEGV on GC. GC may mark every value in VM stack. Unfortunately I couldn't write a test for it... So let me explain the situation. SEGV example: https://gist.github.com/k0kubun/c7cea2b5761ffdff29ec79ea1a8f7f91 ``` $ ruby --dump=insns -e 'def oct(num, len); "%0#{len}o" % num; end' == disasm: #<ISeq:oct@-e:1 (1,0)-(1,41)> (catch: FALSE) local table (size: 2, argc: 2 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1]) [ 2] num@0<Arg> [ 1] len@1<Arg> 0000 putobject "%0" ( 1)[LiCa] 0002 getlocal_WC_0 len@1 0004 dup 0005 checktype T_STRING 0007 branchif 14 0009 dup 0010 opt_send_without_block <callinfo!mid:to_s, argc:0, FCALL|ARGS_SIMPLE>, <callcache> 0013 tostring 0014 putobject "o" 0016 concatstrings 3 0018 getlocal_WC_0 num@0 0020 opt_mod <callinfo!mid:%, argc:1, ARGS_SIMPLE>, <callcache> 0023 leave [Re] ``` Prior to this commit, after arguments are pushed on 0010, stacks were: VM stack: [uninitialized, uninitialized, len] JIT stack: ["%0", len, len] And then, when GC is invoked on 0016, VM stack will be [uninitialized, uninitialized] and those uninitialized values will be marked by GC. With this commit, after arguments are pushed on 0010, stacks will be: VM stack: [len] JIT stack: ["%0", len, len] And VM stack will be [] on 0016. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63360 b2dd03c8-39d4-4d8f-98ff-823fe69b080e		2018-05-08 15:06:11 +00:00
..
m4	Honor --silent option	2018-04-03 08:29:51 +00:00
ruby_vm	_mjit_compile_pc_and_sp.erb: make sure no uninitialized	2018-05-08 15:06:11 +00:00
test
asm_parse.rb
bisect.sh	tool/bisect.sh: extracted build part [ci skip]	2018-03-01 03:26:05 +00:00
build-transcode
change_maker.rb
checksum.rb
colorize.rb
downloader.rb
enc-emoji-citrus-gen.rb
enc-emoji4unicode.rb
enc-unicode.rb
eval.rb
expand-config.rb
extlibs.rb
fake.rb
fetch-bundled_gems.rb
file2lastrev.rb
gem-unpack.rb
gen_dummy_probes.rb
gen_ruby_tapset.rb
generate-backport-changelog.rb
generic_erb.rb	Refactor ERB version checking for keyword arguments	2018-02-27 11:12:23 +00:00
git-refresh
gperf.sed
id2token.rb
ifchange	ifchange: --debug option	2018-02-08 02:08:27 +00:00
insns2vm.rb
install-sh
jisx0208.rb
make-snapshot	Prefer to use %x instead of backtick.	2018-02-28 11:12:36 +00:00
make_hgraph.rb
mdoc2man.rb
merger.rb
mk_call_iseq_optimized.rb
mkconfig.rb	mkconfig.rb: hide MJIT configurations	2018-02-08 15:19:01 +00:00
mkrunnable.rb
node_name.rb
parse.rb
prereq.status
probes_to_wiki.rb
rbinstall.rb	rbinstall.rb: fix timing to read stub	2018-04-27 01:58:29 +00:00
rbuninstall.rb
redmine-backporter.rb
release.sh
rmdirs
run-gcov.rb
run-lcov.rb
runruby.rb
strip-rdoc.rb
sync_default_gems.rb	Support upstream directory structure for ruby/csv.	2018-04-03 05:56:16 +00:00
test-coverage.rb	make test-all COVERAGE=true supports directory-separated build	2018-04-05 01:05:16 +00:00
transcode-tblgen.rb	Refactor ERB version checking for keyword arguments	2018-02-27 11:12:23 +00:00
transform_mjit_header.rb	transform_mjit_header.rb: read output and errors	2018-03-17 02:18:46 +00:00
update-deps
vcs.rb	vcs.rb: .git at export	2018-02-26 06:00:08 +00:00
vpath.rb
vtlh.rb
ytab.sed