go/test/linkname.go

// errorcheckandrundir -0 -m -l=4 -newescape=true

// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Tests that linknames are included in export data (issue 18167).
package ignored

/*
Without CL 33911, this test would fail with the following error:

main.main: relocation target linkname2.byteIndex not defined
main.main: undefined: "linkname2.byteIndex"
*/
cmd/compile: update escape analysis tests for newescape The new escape analysis implementation tries to emit debugging diagnostics that are compatible with the existing implementation, but there's a handful of cases that are easier to handle by updating the test expectations instead. For regress tests that need updating, the original file is copied to oldescapeXXX.go.go with -newescape=false added to the //errorcheck line, while the file is updated in place with -newescape=true and new test requirements. Notable test changes: 1) escape_because.go looks for a lot of detailed internal debugging messages that are fairly particular to how esc.go works and that I haven't attempted to port over to escape.go yet. 2) There are a lot of "leaking param: x to result ~r1 level=-1" messages for code like func(p int) T { return &T{p} } that were simply wrong. Here &T must be heap allocated unconditionally (because it's being returned); and since p is stored into it, p escapes unconditionally too. esc.go incorrectly reports that p escapes conditionally only if the returned pointer escaped. 3) esc.go used to print each "leaking param" analysis result as it discovered them, which could lead to redundant messages (e.g., that a param leaks at level=0 and level=1). escape.go instead prints everything at the end, once it knows the shortest path to each sink. 4) esc.go didn't precisely model direct-interface types, resulting in some values unnecessarily escaping to the heap when stored into non-escaping interface values. 5) For functions written in assembly, esc.go only printed "does not escape" messages, whereas escape.go prints "does not escape" or "leaking param" as appropriate, consistent with the behavior for functions written in Go. 6) 12 tests included "BAD" annotations identifying cases where esc.go was unnecessarily heap allocating something. These are all fixed by escape.go. Updates #23109. Change-Id: Iabc9eb14c94c9cadde3b183478d1fd54f013502f Reviewed-on: https://go-review.googlesource.com/c/go/+/170447 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> 2019-04-02 14:44:13 -07:00			`// errorcheckandrundir -0 -m -l=4 -newescape=true`
cmd/compile: include linknames in export data This lets the compiler inline functions that contain a linknamed symbol. Previously, the net/http tests would fail to build with -l=4 because the compiler inlined functions that call net.byteIndex (which is linknamed to strings.IndexByte). This changes only the compiler-specific export data, so we don't need to bump the export format version number. The following benchmark results show how the size of package export data is impacted by this change. These benchmarks were created by compiling the go1 benchmark and running `go tool pack x` to extract the export data from the resulting .a files. name old bytes new bytes delta bufio 3.48k ± 0% 3.58k ± 0% +2.90% bytes 5.05k ± 0% 5.16k ± 0% +2.16% compress/bzip2 2.61k ± 0% 2.68k ± 0% +2.68% compress/flate 5.07k ± 0% 5.14k ± 0% +1.40% compress/gzip 8.26k ± 0% 8.40k ± 0% +1.70% container/list 1.69k ± 0% 1.76k ± 0% +4.07% context 3.93k ± 0% 4.01k ± 0% +1.86% crypto 1.03k ± 0% 1.03k ± 0% +0.39% crypto/aes 475 ± 0% 475 ± 0% +0.00% crypto/cipher 1.18k ± 0% 1.18k ± 0% +0.00% crypto/des 502 ± 0% 502 ± 0% +0.00% crypto/dsa 5.71k ± 0% 5.77k ± 0% +1.16% crypto/ecdsa 6.67k ± 0% 6.75k ± 0% +1.08% crypto/elliptic 6.28k ± 0% 6.35k ± 0% +1.07% crypto/hmac 464 ± 0% 464 ± 0% +0.00% crypto/internal/cipherhw 313 ± 0% 313 ± 0% +0.00% crypto/md5 691 ± 0% 695 ± 0% +0.58% crypto/rand 5.37k ± 0% 5.43k ± 0% +1.23% crypto/rc4 512 ± 0% 512 ± 0% +0.00% crypto/rsa 7.05k ± 0% 7.12k ± 0% +1.05% crypto/sha1 756 ± 0% 760 ± 0% +0.53% crypto/sha256 523 ± 0% 523 ± 0% +0.00% crypto/sha512 662 ± 0% 662 ± 0% +0.00% crypto/subtle 835 ± 0% 873 ± 0% +4.55% crypto/tls 28.1k ± 0% 28.5k ± 0% +1.30% crypto/x509 17.7k ± 0% 17.9k ± 0% +1.04% crypto/x509/pkix 9.75k ± 0% 9.90k ± 0% +1.50% encoding 473 ± 0% 473 ± 0% +0.00% encoding/asn1 1.41k ± 0% 1.42k ± 0% +1.00% encoding/base64 1.67k ± 0% 1.69k ± 0% +0.90% encoding/binary 2.65k ± 0% 2.76k ± 0% +4.07% encoding/gob 13.3k ± 0% 13.5k ± 0% +1.65% encoding/hex 854 ± 0% 857 ± 0% +0.35% encoding/json 11.9k ± 0% 12.1k ± 0% +1.71% encoding/pem 484 ± 0% 484 ± 0% +0.00% errors 360 ± 0% 361 ± 0% +0.28% flag 7.32k ± 0% 7.42k ± 0% +1.48% fmt 1.42k ± 0% 1.42k ± 0% +0.00% go/ast 15.7k ± 0% 15.8k ± 0% +1.07% go/parser 7.48k ± 0% 7.59k ± 0% +1.55% go/scanner 3.88k ± 0% 3.94k ± 0% +1.39% go/token 3.51k ± 0% 3.53k ± 0% +0.60% hash 507 ± 0% 507 ± 0% +0.00% hash/crc32 685 ± 0% 685 ± 0% +0.00% internal/nettrace 474 ± 0% 474 ± 0% +0.00% internal/pprof/profile 8.29k ± 0% 8.36k ± 0% +0.89% internal/race 511 ± 0% 511 ± 0% +0.00% internal/singleflight 966 ± 0% 969 ± 0% +0.31% internal/syscall/unix 427 ± 0% 427 ± 0% +0.00% io 3.48k ± 0% 3.52k ± 0% +1.15% io/ioutil 5.30k ± 0% 5.38k ± 0% +1.53% log 4.46k ± 0% 4.53k ± 0% +1.59% math 3.72k ± 0% 3.75k ± 0% +0.75% math/big 8.91k ± 0% 9.01k ± 0% +1.15% math/rand 1.29k ± 0% 1.30k ± 0% +0.46% mime 2.59k ± 0% 2.63k ± 0% +1.55% mime/multipart 3.61k ± 0% 3.68k ± 0% +1.80% mime/quotedprintable 2.20k ± 0% 2.25k ± 0% +2.50% net 21.1k ± 0% 21.3k ± 0% +1.10% net/http 56.6k ± 0% 57.3k ± 0% +1.28% net/http/httptest 33.6k ± 0% 34.1k ± 0% +1.38% net/http/httptrace 14.4k ± 0% 14.5k ± 0% +1.29% net/http/internal 2.70k ± 0% 2.77k ± 0% +2.59% net/textproto 4.51k ± 0% 4.60k ± 0% +1.82% net/url 1.71k ± 0% 1.73k ± 0% +1.41% os 11.3k ± 0% 11.4k ± 0% +1.36% path 587 ± 0% 589 ± 0% +0.34% path/filepath 4.46k ± 0% 4.55k ± 0% +1.88% reflect 6.39k ± 0% 6.43k ± 0% +0.72% regexp 5.82k ± 0% 5.88k ± 0% +1.12% regexp/syntax 3.22k ± 0% 3.24k ± 0% +0.62% runtime 12.9k ± 0% 13.2k ± 0% +1.94% runtime/cgo 229 ± 0% 229 ± 0% +0.00% runtime/debug 3.66k ± 0% 3.72k ± 0% +1.86% runtime/internal/atomic 905 ± 0% 905 ± 0% +0.00% runtime/internal/sys 2.00k ± 0% 2.05k ± 0% +2.55% runtime/pprof 4.16k ± 0% 4.23k ± 0% +1.66% runtime/pprof/internal/protopprof 11.5k ± 0% 11.7k ± 0% +1.27% runtime/trace 354 ± 0% 354 ± 0% +0.00% sort 1.63k ± 0% 1.68k ± 0% +2.94% strconv 1.84k ± 0% 1.85k ± 0% +0.54% strings 3.87k ± 0% 3.97k ± 0% +2.48% sync 1.51k ± 0% 1.52k ± 0% +0.33% sync/atomic 1.58k ± 0% 1.60k ± 0% +1.27% syscall 53.2k ± 0% 53.3k ± 0% +0.20% testing 8.14k ± 0% 8.26k ± 0% +1.49% testing/internal/testdeps 597 ± 0% 598 ± 0% +0.17% text/tabwriter 3.09k ± 0% 3.14k ± 0% +1.85% text/template 15.4k ± 0% 15.7k ± 0% +1.89% text/template/parse 8.90k ± 0% 9.12k ± 0% +2.46% time 5.75k ± 0% 5.86k ± 0% +1.86% unicode 4.62k ± 0% 4.62k ± 0% +0.07% unicode/utf16 693 ± 0% 706 ± 0% +1.88% unicode/utf8 1.05k ± 0% 1.07k ± 0% +1.14% vendor/golang_org/x/crypto/chacha20poly1305 1.25k ± 0% 1.26k ± 0% +0.64% vendor/golang_org/x/crypto/curve25519 392 ± 0% 392 ± 0% +0.00% vendor/golang_org/x/crypto/poly1305 426 ± 0% 426 ± 0% +0.00% vendor/golang_org/x/net/http2/hpack 4.19k ± 0% 4.26k ± 0% +1.69% vendor/golang_org/x/net/idna 355 ± 0% 355 ± 0% +0.00% vendor/golang_org/x/net/lex/httplex 609 ± 0% 615 ± 0% +0.99% vendor/golang_org/x/text/transform 1.31k ± 0% 1.31k ± 0% +0.08% vendor/golang_org/x/text/unicode/norm 5.78k ± 0% 5.90k ± 0% +2.06% vendor/golang_org/x/text/width 1.24k ± 0% 1.24k ± 0% +0.16% [Geo mean] 2.49k 2.52k +1.10% Fixes #18167. Change-Id: Ia5b7e70adc9652c7ee9954ca2efc1c59fa79be2b Reviewed-on: https://go-review.googlesource.com/33911 Run-TryBot: David Lazar <lazard@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> Reviewed-by: David Chase <drchase@google.com> 2016-12-02 13:55:25 -05:00
			`// Copyright 2010 The Go Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

			`// Tests that linknames are included in export data (issue 18167).`
			`package ignored`

			`/*`
			`Without CL 33911, this test would fail with the following error:`

			`main.main: relocation target linkname2.byteIndex not defined`
			`main.main: undefined: "linkname2.byteIndex"`
			`*/`