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Keith Randall 6fab4b9a9e [release-branch.go1.22] runtime: size maps.Clone destination bucket array safely 
In rare situations, like during same-sized grows, the source map for
maps.Clone may be overloaded (has more than 6.5 entries per
bucket). This causes the runtime to allocate a larger bucket array for
the destination map than for the source map. The maps.Clone code
walks off the end of the source array if it is smaller than the
destination array.

This is a pretty simple fix, ensuring that the destination bucket
array is never longer than the source bucket array. Maybe a better fix
is to make the Clone code handle shorter source arrays correctly, but
this fix is deliberately simple to reduce the risk of backporting this
fix.

Fixes #69155

Change-Id: I824c93d1db690999f25a3c43b2816fc28ace7509
Reviewed-on: https://go-review.googlesource.com/c/go/+/610238
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
 		2024-09-06 14:32:54 +00:00
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abi test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
alias3.dir
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arenas reflect: fix ArenaNew to match documentation 2023-06-16 17:08:43 +00:00
asmhdr.dir
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closure3.dir cmd/compile/internal/noder: remove inlined closure naming hack 2023-08-17 19:36:29 +00:00
closure5.dir
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codegen all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
ddd2.dir
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dwarf
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fixedbugs [release-branch.go1.22] runtime: size maps.Clone destination bucket array safely 2024-09-06 14:32:54 +00:00
import2.dir
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interface go/types, types2: more systematic use of Checker.use und useLHS 2023-03-28 14:28:33 +00:00
intrinsic.dir
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typeparam all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
uintptrescapes.dir
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64bit.go
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README.md internal/testdir: move to cmd/internal/testdir 2023-05-12 17:18:08 +00:00
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chanlinear.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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clear.go
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closure2.go cmd/compile: experimental loop iterator capture semantics change 2023-03-06 18:34:24 +00:00
closure3.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
closure4.go
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const7.go all: add wasip1 support 2023-04-11 20:56:32 +00:00
const8.go
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convT2X.go
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convert.go
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convert1.go
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copy.go
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env.go test,internal/testdir: don't set GOOS/GOARCH 2023-05-12 12:34:59 +00:00
eof.go
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eof1.go
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escape.go cmd/compile: experimental loop iterator capture semantics change 2023-03-06 18:34:24 +00:00
escape2.go all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
escape2n.go all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
escape3.go
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escape4.go cmd/compile/internal/inl: inline based on scoring when GOEXPERIMENT=newinliner 2023-09-14 19:43:26 +00:00
escape5.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_array.go
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escape_calls.go cmd/compile: fix escape analysis of string min/max 2023-12-05 22:06:07 +00:00
escape_closure.go cmd/compile/internal/escape: optimize indirect closure calls 2023-08-17 16:36:09 +00:00
escape_field.go
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escape_goto.go
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escape_hash_maphash.go
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escape_iface.go test: remove *_unified.go variants 2023-05-23 17:16:35 +00:00
escape_indir.go
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escape_level.go
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escape_map.go
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escape_mutations.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
escape_param.go
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escape_reflect.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_runtime_atomic.go
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escape_slice.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_struct_param1.go
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fibo.go
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finprofiled.go test: ignore MemProfileRecords with no live objects in finprofiled.go 2023-11-16 05:48:00 +00:00
float_lit.go
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float_lit2.go
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float_lit3.go
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floatcmp.go
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for.go test: add test cases for index value with range array clear 2023-07-10 16:36:41 +00:00
func.go
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fuse.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
gc.go
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gc1.go
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gc2.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
gcgort.go
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gcstring.go
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goto.go
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heapsampling.go
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helloworld.go
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helloworld.out
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if.go
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import.go
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inline.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
inline_big.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
inline_caller.go
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inline_endian.go
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inline_math_bits_rotate.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
inline_sync.go sync: use atomic.Uint32 in Once 2023-10-06 21:01:50 +00:00
inline_variadic.go
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intrinsic.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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iota.go
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label.go
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linkmain.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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literal.go
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live.go math/rand, math/rand/v2: use ChaCha8 for global rand 2023-12-05 20:34:30 +00:00
live1.go
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live2.go cmd/compile/internal/reflectdata: share hmap and hiter types 2023-08-21 23:29:33 +00:00
live_regabi.go math/rand, math/rand/v2: use ChaCha8 for global rand 2023-12-05 20:34:30 +00:00
live_uintptrkeepalive.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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maplinear.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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newinline.go cmd/compile/internal/inline: refactor AnalyzeFunc 2023-11-16 20:15:25 +00:00
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nilptr.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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noinit.go cmd/compile: reenable inline static init 2023-04-14 17:57:36 +00:00
nosplit.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nowritebarrier.go cmd/compile: redo IsRuntimePkg/IsReflectPkg predicate 2023-08-22 19:18:21 +00:00
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prove.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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range2.go all: rename GOEXPERIMENT=range to rangefunc 2023-11-08 15:32:14 +00:00
range3.go cmd/compile: fix typecheck range over rune literal 2023-12-01 17:20:08 +00:00
range4.go cmd/compile: handle defined iter func type correctly 2024-01-08 16:00:53 +00:00
rangegen.go test: skip rangegen.go on 32-bit platforms 2023-12-18 23:35:19 +00:00
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zerosize.go cmd/link: put zero-sized data symbols at same address as runtime.zerobase 2023-04-28 18:35:43 +00:00

README.md

The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go test cmd/internal/testdir

To run just tests from specified files in this directory, execute:

../bin/go test cmd/internal/testdir -run='Test/(file1.go|file2.go|...)'

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.