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840965f8d7
go/test
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Austin Clements 840965f8d7 runtime: always clear stack barriers on G exit 
Currently the runtime fails to clear a G's stack barriers in gfput if
the G's stack allocation is _FixedStack bytes. This causes the runtime
to panic if the following sequence of events happens:

1) The runtime installs stack barriers on a G.

2) The G exits by calling runtime.Goexit. Since this does not
   necessarily return through the stack barriers installed on the G,
   there may still be untriggered stack barriers left on the G's stack
   in recorded in g.stkbar.

3) The runtime calls gfput to add the exiting G to the free pool. If
   the G's stack allocation is _FixedStack bytes, we fail to clear
   g.stkbar.

4) A new G starts and allocates the G that was just added to the free
   pool.

5) The new G begins to execute and overwrites the stack slots that had
   stack barriers in them.

6) The garbage collector enters mark termination, attempts to remove
   stack barriers from the new G, and finds that they've been
   overwritten.

Fix this by clearing the stack barriers in gfput in the case where it
reuses the stack.

Fixes #11256.

Change-Id: I377c44258900e6bcc2d4b3451845814a8eeb2bcf
Reviewed-on: https://go-review.googlesource.com/11461
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2015-06-29 15:02:30 +00:00
..
bench all: retire architecture letter in file names, public API 2015-05-21 17:32:17 +00:00
bugs test: migrate remaining tests to run.go 2014-12-22 22:41:34 +00:00
chan Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
ddd2.dir test: convert tests to run.go whenever possible. 2012-10-10 22:35:27 +02:00
dwarf test: make rundir match compiledir/errorcheckdir. 2013-01-11 22:00:48 +01:00
fixedbugs runtime: always clear stack barriers on G exit 2015-06-29 15:02:30 +00:00
import2.dir test: convert more tests to rundir/compiledir conventions 2012-10-07 23:22:01 +02:00
import4.dir test: match gccgo import error messages 2013-12-12 19:02:11 -08:00
interface cmd/internal/gc: improve "type *X has no field or method M" message 2015-05-07 16:21:57 +00:00
ken go/test/chan1.go: fix typo 2012-02-25 08:47:04 +11:00
method4.dir cmd/gc: do not omit wrapper for expression (interface{...}).F 2014-01-07 13:26:48 +01:00
safe test: adapt old-style tests to new flag parsing. 2013-01-11 22:05:46 +01:00
stress build: adjustments for move from src/pkg to src 2014-09-08 00:06:45 -04:00
syntax test: match gccgo error messages 2013-12-12 17:18:12 -08:00
64bit.go cmd/gc: Error out on division by constant zero. 2013-01-30 20:21:08 +01:00
235.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
alias1.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
alias.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
append.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
args.go test: run some more tests by default 2012-11-08 09:04:27 -08:00
assign1.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
assign.go cmd/gc: prohibit short variable declarations containing duplicate symbols 2014-10-06 17:16:39 -04:00
bigalg.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
bigmap.go runtime: handle and test large map values 2012-05-24 22:41:07 -04:00
blank1.go test: match gccgo error messages for blank1.go 2013-09-28 15:19:05 -07:00
blank.go test: revert changes made for Go SSA interpreter test. 2013-10-08 14:36:20 -04:00
bom.go gc: initial BOM is legal. 2012-09-10 13:03:07 -07:00
bombad.go gc: initial BOM is legal. 2012-09-10 13:03:07 -07:00
bounds.go test: prepare for 64-bit ints 2012-09-24 00:06:41 -04:00
chancap.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
chanlinear.go runtime: test for linear enqueue/dequeue behavior 2014-12-08 22:18:17 +00:00
char_lit1.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
char_lit.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
clearfat.go [dev.power64] 9g: fix under-zeroing in clearfat 2014-10-31 11:08:27 -04:00
closedchan.go test: use testlib (first 100) 2012-02-16 23:48:57 -05:00
closure1.go cmd/gc: capture variables by value 2015-01-29 13:07:30 +00:00
closure2.go cmd/gc: fix capturing by value for range statements 2015-02-03 15:48:48 +00:00
closure.go test: enforce 1 proc in the test 2012-07-01 21:59:50 +04:00
cmp6.go cmd/gc: do not consider length zero arrays as comparable. 2014-01-31 00:30:56 +01:00
cmp.go Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
cmplx.go cmd/gc: reject complex calls with mismatched argument types. 2013-03-11 22:55:14 +01:00
cmplxdivide1.go test: use testlib in a few more cases 2012-03-22 02:14:44 +08:00
cmplxdivide.c test: comment the behavior and use of cmplxdivide* 2015-01-15 00:00:06 +00:00
cmplxdivide.go test: comment the behavior and use of cmplxdivide* 2015-01-15 00:00:06 +00:00
complit1.go cmd/internal/gc: accept map literals with omitted key type 2015-06-04 02:31:38 +00:00
complit.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
compos.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
const1.go test: match gccgo error messages 2013-12-12 17:18:12 -08:00
const2.go test: match gccgo error messages 2012-09-28 08:30:30 -07:00
const3.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
const4.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
const5.go cmd/gc: reject builtin function calls in len(fixed array) constants 2014-04-03 19:04:33 -04:00
const6.go test: match gccgo error strings. 2013-06-26 18:05:02 +02:00
const.go exp/ssa/interp: (#6 of 5): test interpretation of SSA form of $GOROOT/test/*.go. 2013-02-21 12:48:38 -05:00
convert1.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
convert3.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
convert.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
convlit1.go test: [a-c]: add introductory comments to tests 2012-02-19 13:19:43 +11:00
convlit.go cmd/internal/gc: unsafe.Pointer constants may only be converted to uintptr 2015-05-07 23:54:28 +00:00
convT2X.go cmd/gc: cache itab lookup in convT2I. 2012-07-03 09:09:05 +10:00
copy.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
crlf.go test: use testlib in a few more cases (part 2) 2012-04-20 23:45:43 +08:00
ddd1.go test: match gccgo error messages 2012-09-28 08:30:30 -07:00
ddd2.go test: convert tests to run.go whenever possible. 2012-10-10 22:35:27 +02:00
ddd.go test: enable method expression tests in ddd.go 2012-03-07 11:17:26 -08:00
decl.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
declbad.go test: correct type in declbad.go 2012-10-07 21:52:57 +02:00
defer.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
deferfin.go runtime: combine small NoScan allocations 2014-01-24 22:35:11 +04:00
deferprint.go test: add cmpout to testlib 2012-02-24 13:17:26 +11:00
deferprint.out test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
divide.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
divmod.go all: fix a few spelling errors in source comments 2013-12-27 08:59:02 -08:00
empty.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
env.go os: remove Getenverror 2012-02-18 21:18:13 -08:00
eof1.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
eof.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
errchk Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
escape2.go cmd/compile: handle copy in escape analysis 2015-06-24 22:22:55 +00:00
escape2n.go cmd/compile: handle copy in escape analysis 2015-06-24 22:22:55 +00:00
escape3.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
escape4.go cmd/internal/gc: transitive inlining 2015-02-26 17:36:00 +00:00
escape5.go cmd/internal/gc: move check for large-hence-heap-allocated types into escape analysis 2015-05-22 02:13:54 +00:00
escape_array.go cmd/internal/gc: move check for large-hence-heap-allocated types into escape analysis 2015-05-22 02:13:54 +00:00
escape_calls.go cmd/internal/gc: make indirect calls properly escape-y 2015-05-22 01:36:11 +00:00
escape_closure.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_field.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_iface.go test: add tests for escape analysis of interface conversions 2015-03-28 16:15:27 +00:00
escape_indir.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_level.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_map.go test: add tests for escape analysis of interface conversions 2015-03-28 16:15:27 +00:00
escape_param.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_slice.go cmd/internal/gc: extend escape analysis to pointers in slices 2015-05-18 15:34:39 +00:00
escape_struct_param1.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_struct_param2.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape_struct_return.go cmd/internal/gc: improve flow of input params to output params 2015-05-01 13:47:20 +00:00
escape.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
fibo.go Fix whitespace (use blanks consistently). 2014-12-08 22:22:58 +00:00
float_lit2.go test: fix two typos in float_lit2.go 2014-05-21 17:19:12 -04:00
float_lit3.go test/float_lit2.go: rewrite to test values near boundaries 2014-05-21 17:12:06 -04:00
float_lit.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
floatcmp.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
for.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
func1.go cmd/gc: ensure unique parameter and result names in function types 2013-03-15 15:24:13 -04:00
func2.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
func3.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
func4.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
func5.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
func6.go Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
func7.go Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
func8.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
func.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
funcdup2.go test: match gccgo error messages 2013-12-12 17:18:12 -08:00
funcdup.go test: match gccgo error messages 2013-12-12 17:18:12 -08:00
gc1.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
gc2.go test: check for build constraints only upto the first blank line 2015-02-06 05:36:26 +00:00
gc.go test: explanatory comments [c-g]* 2012-02-19 14:28:53 +11:00
gcstring.go runtime: fix empty string handling in garbage collector 2014-03-11 23:58:39 -04:00
goprint.go test: make goprint.go wait longer for go its routine to execute 2013-04-12 16:04:19 -07:00
goprint.out test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
goto.go Revert "cmd/internal/gc: ignore declarations of types for goto validation" 2015-05-15 16:35:49 +00:00
helloworld.go test: add cmpout to testlib 2012-02-24 13:17:26 +11:00
helloworld.out test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
if.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
import1.go test: match gccgo import error messages 2013-12-12 19:02:11 -08:00
import2.go test: convert more tests to rundir/compiledir conventions 2012-10-07 23:22:01 +02:00
import4.go test: convert more tests to rundir/compiledir conventions 2012-10-07 23:22:01 +02:00
import5.go gc: disallow absolute import paths 2012-02-29 15:28:36 -05:00
import.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
index0.go test: run index test by default 2012-11-07 12:33:54 -08:00
index1.go test: run index test by default 2012-11-07 12:33:54 -08:00
index2.go test: run index test by default 2012-11-07 12:33:54 -08:00
index.go Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
indirect1.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
indirect.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
init1.go test: deflake init1.go test, tighten its bounds 2015-02-13 22:13:56 +00:00
init.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
initcomma.go test/initcomma.go: restore what it's supposed to be testing 2012-02-20 07:44:24 +11:00
initialize.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
initializerr.go test: add "duplicate" struct map key test 2012-12-17 11:05:58 -05:00
inline.go cmd/internal/gc: transitive inlining 2015-02-26 17:36:00 +00:00
int_lit.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
intcvt.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
iota.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
label1.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
label.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
linkx_run.go cmd/link: deprecate -X name value in favor of -X name=value 2015-06-05 04:55:41 +00:00
linkx.go cmd/link: deprecate -X name value in favor of -X name=value 2015-06-05 04:55:41 +00:00
literal.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
live1.go cmd/gc: correct liveness for fat variables 2014-02-15 10:58:55 -05:00
live2.go cmd/gc: allocate non-escaping maps on stack 2015-02-12 09:53:52 +00:00
live.go test: add -update_errors flag to run script 2015-04-10 11:33:42 +00:00
mallocfin.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
map1.go cmd/gc: fix type checking loop 2012-06-07 03:06:40 -04:00
map.go test/mapnan.go: add regression test for non-empty interfaces. 2014-08-06 17:02:55 -04:00
maplinear.go test: make maplinear more robust 2014-10-27 18:59:02 -04:00
method1.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
method2.go cmd/gc: fix method values whose receiver is an unnamed interface. 2013-08-29 10:00:58 +02:00
method3.go test: commentary for [h-m]*.go 2012-02-23 18:47:26 +11:00
method4.go test: convert more tests to rundir/compiledir conventions 2012-10-07 23:22:01 +02:00
method5.go cmd/gc: implement method values 2013-03-20 17:11:09 -04:00
method.go test: a number of fixes. 2013-02-11 18:20:52 -05:00
named1.go cmd/gc: comma-ok assignments produce untyped bool as 2nd result 2014-08-11 16:11:55 -07:00
named.go gc: return of ideal bool 2012-02-21 22:54:07 -05:00
nil.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
nilcheck.go cmd/gc: optimize existence-only map lookups 2015-01-07 22:36:06 +00:00
nilptr2.go test: revert changes made for Go SSA interpreter test. 2013-10-08 14:36:20 -04:00
nilptr3.go cmd/7g: enable peephole optimizer 2015-04-08 08:16:54 +00:00
nilptr4.go cmd/gc: fix bad checknil with ints on 32 bit compilers 2014-02-26 12:25:13 -08:00
nilptr.go test/nilptr: add more tests 2013-09-05 23:06:34 -04:00
nosplit.go test: fix build on GOARCH=ppc64/ppc64le 2015-06-06 20:22:57 +00:00
nul1.go test: run some more tests by default 2012-11-08 09:04:27 -08:00
parentype.go test/[n-r]*.go: add documentation 2012-02-24 10:30:39 +11:00
peano.go test/[n-r]*.go: add documentation 2012-02-24 10:30:39 +11:00
print.go runtime: move built-in print routines to go. 2014-07-31 13:48:48 -07:00
print.out runtime: move built-in print routines to go. 2014-07-31 13:48:48 -07:00
printbig.go test: add cmpout to testlib 2012-02-24 13:17:26 +11:00
printbig.out test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
range.go cmd/gc: implement 'for range x {' 2014-07-16 19:27:10 -04:00
recover1.go test: use testlib (final 61) 2012-02-16 23:51:04 -05:00
recover2.go test: use testlib (final 61) 2012-02-16 23:51:04 -05:00
recover3.go tests: remove two misuses of nil pointers 2013-08-15 11:51:04 -04:00
recover4.go test: fix recover4 test on 64kb systems 2015-03-17 05:25:01 +00:00
recover.go test: add more cases to recover.go 2014-10-22 08:06:15 -07:00
rename1.go test: fix the fix of the rename tests. 2012-02-24 15:06:32 +11:00
rename.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00
reorder2.go cmd/gc: shorten temporary lifetimes when possible 2014-04-01 13:31:38 -04:00
reorder.go test: a number of fixes. 2013-02-11 18:20:52 -05:00
return.go test: add cases to return.go that gccgo got wrong 2013-08-07 11:31:01 -07:00
rotate0.go test: re-enable rotate tests 2015-05-28 19:40:58 +00:00
rotate1.go test: re-enable rotate tests 2015-05-28 19:40:58 +00:00
rotate2.go test: re-enable rotate tests 2015-05-28 19:40:58 +00:00
rotate3.go test: re-enable rotate tests 2015-05-28 19:40:58 +00:00
rotate.go test: add rotate.go and fixedbugs/bug313 2013-01-11 22:42:55 +01:00
run.go Fix several out of date references to 4g/5g/6g/8g/9g. 2015-06-26 03:38:21 +00:00
rune.go test/[n-r]*.go: add documentation 2012-02-24 10:30:39 +11:00
runtime.go test/[n-r]*.go: add documentation 2012-02-24 10:30:39 +11:00
shift1.go test: avoid "declared but not used" errors in shift1.go 2014-07-20 12:25:24 -07:00
shift2.go test: add shift expression incorrectly rejected by gccgo. 2013-06-25 08:06:34 +02:00
sieve.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
sigchld.go test: skip SIGCHLD test on Plan 9 2014-01-29 09:28:23 +01:00
sigchld.out test: split golden.out into expected output per test 2012-01-18 16:12:24 -08:00
simassign.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
sinit_run.go all: retire architecture letter in file names, public API 2015-05-21 17:32:17 +00:00
sinit.go test: move linkx and sinit to run.go 2014-11-06 15:14:08 -05:00
sizeof.go test: correct sizeof.go. 2013-06-02 19:10:11 +02:00
slice3.go cmd/gc, runtime: treat slices and strings like pointers in garbage collection 2014-08-25 14:38:19 -04:00
slice3err.go test: match gccgo error messages 2013-12-12 17:18:12 -08:00
slicecap.go cmd/gc, runtime: treat slices and strings like pointers in garbage collection 2014-08-25 14:38:19 -04:00
sliceopt.go cmd/internal/gc: optimize slice + write barrier 2015-05-13 19:20:39 +00:00
solitaire.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
stack.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
string_lit.go test: add []rune case to string_lit.go 2013-12-12 17:17:02 -08:00
stringrange.go all: make Unicode surrogate halves illegal as UTF-8 2012-08-08 14:01:23 -07:00
struct0.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
switch3.go cmd/gc: accept switches on comparable arrays. 2012-08-03 21:47:26 +02:00
switch4.go cmd/gc: disallow fallthrough in final case of switch 2013-03-15 00:35:09 -04:00
switch.go cmd/gc: disallow fallthrough in final case of switch 2013-03-15 00:35:09 -04:00
tinyfin.go runtime: combine small NoScan allocations 2014-01-24 22:35:11 +04:00
torture.go cmd/8g: don't allocate a register early for cap(CHAN). 2014-07-01 09:20:51 +02:00
turing.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
typecheck.go cmd/gc: silence assignment errors to undefined symbols 2014-01-03 21:03:20 +01:00
typeswitch1.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
typeswitch2.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
typeswitch3.go test: match gccgo error messages 2012-09-28 08:30:30 -07:00
typeswitch.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
undef.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
utf.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
varerr.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
varinit.go test/[n-z]*.go: add documentation 2012-02-24 11:48:19 +11:00
writebarrier.go cmd/internal/gc: add missing write barrier in append(x, BigStructWithPointers) 2015-05-19 15:28:29 +00:00
zerodivide.go test: ensure all failing tests exit nonzero. 2013-02-12 13:17:49 -05:00