third_party: Move valgrind

- Move src/third_party_valgrind/ to third_party/valgrind
- Add README.v8

Bug: 383356859
Change-Id: I7f6b3471648707c0f40c72d687f4261711056454
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6088199
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#97756}

.gitignore

@@ -84,6 +84,7 @@
 /third_party/re2/src
 !/third_party/test262-harness
 !/third_party/v8
+!/third_party/valgrind
 !/third_party/wasm-api
 /tools/builtins-pgo/profiles/*
 !/tools/builtins-pgo/profiles/.*

BUILD.gn

@@ -4663,8 +4663,8 @@ v8_header_set("v8_internal_headers") {
       "src/compiler/backend/x64/unwinding-info-writer-x64.h",
       "src/execution/x64/frame-constants-x64.h",
       "src/regexp/x64/regexp-macro-assembler-x64.h",
-      "src/third_party/valgrind/valgrind.h",
       "src/wasm/baseline/x64/liftoff-assembler-x64-inl.h",
+      "third_party/valgrind/valgrind.h",
     ]
 
     if (is_win) {

LICENSE

@@ -19,7 +19,7 @@ are:
     This code is copyrighted by Sun Microsystems Inc. and released
     under a 3-clause BSD license.
 
-  - Valgrind client API header, located at src/third_party/valgrind/valgrind.h
+  - Valgrind client API header, located at third_party/valgrind/valgrind.h
     This is released under the BSD license.
 
   - The Wasm C/C++ API headers, located at third_party/wasm-api/wasm.{h,hh}
@@ -30,7 +30,7 @@ are:
 These libraries have their own licenses; we recommend you read them,
 as their terms may differ from the terms below.
 
-Further license information can be found in LICENSE files located in 
+Further license information can be found in LICENSE files located in
 sub-directories.
 
 Copyright 2014, the V8 project authors. All rights reserved.

src/codegen/DEPS

@@ -14,3 +14,7 @@ specific_include_rules = {
     "+src/compiler/turboshaft",
   ]
 }
+
+include_rules = [
+  "+third_party/valgrind/valgrind.h"
+]

src/codegen/ia32/cpu-ia32.cc

@@ -4,13 +4,12 @@
 
 // CPU specific code for ia32 independent of OS goes here.
 
-#if defined(__GNUC__) && !defined(GOOGLE3)
-#include "src/third_party/valgrind/valgrind.h"
-#endif
-
 #if V8_TARGET_ARCH_IA32
 
 #include "src/codegen/cpu-features.h"
+#if defined(__GNUC__) && !defined(GOOGLE3)
+#include "third_party/valgrind/valgrind.h"
+#endif
 
 namespace v8 {
 namespace internal {

src/codegen/x64/cpu-x64.cc

@@ -4,13 +4,12 @@
 
 // CPU specific code for x64 independent of OS goes here.
 
-#if defined(__GNUC__) && !defined(__MINGW64__) && !defined(GOOGLE3)
-#include "src/third_party/valgrind/valgrind.h"
-#endif
-
 #if V8_TARGET_ARCH_X64
 
 #include "src/codegen/cpu-features.h"
+#if defined(__GNUC__) && !defined(__MINGW64__) && !defined(GOOGLE3)
+#include "third_party/valgrind/valgrind.h"
+#endif
 
 namespace v8 {
 namespace internal {

src/third_party/valgrind/OWNERS

@@ -1 +0,0 @@
-file:../../../COMMON_OWNERS

third_party/valgrind/OWNERS

@@ -0,0 +1 @@
+file:../../COMMON_OWNERS

third_party/valgrind/README.v8

@@ -0,0 +1,10 @@
+Name: valgrind
+URL: https://valgrind.org/
+Version: 3.6
+License: BSD
+License File: LICENSE
+Shipped: no
+Security Critical: no
+
+Description:
+Client header for controlling Valgrind execution.

tools/gcmole/BUILD.gn

@@ -43,6 +43,7 @@ if (v8_gcmole) {
       "../../third_party/fp16/",
       "../../third_party/highway/",
       "../../third_party/v8/codegen/",
+      "../../third_party/valgrind/",
       "$target_gen_dir/../../",
       "$target_gen_dir/../../torque-generated/",