[clang] Enable sized deallocation by default in C++14 onwards #83774
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@llvm/pr-subscribers-clang-tools-extra @llvm/pr-subscribers-libcxx Author: Wang Pengcheng (wangpc-pp) ChangesSince C++14 has been released for about nine years and most standard This is another try of https://reviews.llvm.org/D112921. Some buildbots failed last time and I hope the owners may help me to Patch is 53.09 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/83774.diff 41 Files Affected:
diff --git a/clang-tools-extra/clangd/unittests/FindTargetTests.cpp b/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
index 0af6036734ba53..1b7b96281dfaa5 100644
--- a/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
+++ b/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
@@ -839,7 +839,9 @@ TEST_F(TargetDeclTest, OverloadExpr) {
[[delete]] x;
}
)cpp";
- EXPECT_DECLS("CXXDeleteExpr", "void operator delete(void *) noexcept");
+ // Sized deallocation is enabled by default in C++14 onwards.
+ EXPECT_DECLS("CXXDeleteExpr",
+ "void operator delete(void *, unsigned long) noexcept");
}
TEST_F(TargetDeclTest, DependentExprs) {
diff --git a/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp b/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
index 78f021144b2e19..f86fe8a4c5b14f 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
@@ -12,16 +12,6 @@ struct S {
// CHECK-MESSAGES: :[[@LINE+1]]:7: warning: declaration of 'operator new' has no matching declaration of 'operator delete' at the same scope
void *operator new(size_t size) noexcept(false);
-struct T {
- // Sized deallocations are not enabled by default, and so this new/delete pair
- // does not match. However, we expect only one warning, for the new, because
- // the operator delete is a placement delete and we do not warn on mismatching
- // placement operations.
- // CHECK-MESSAGES: :[[@LINE+1]]:9: warning: declaration of 'operator new' has no matching declaration of 'operator delete' at the same scope
- void *operator new(size_t size) noexcept;
- void operator delete(void *ptr, size_t) noexcept; // ok only if sized deallocation is enabled
-};
-
struct U {
void *operator new(size_t size) noexcept;
void operator delete(void *ptr) noexcept;
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 6f6ce7c68a7a71..fb491a257dc715 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -72,6 +72,10 @@ sections with improvements to Clang's support for those languages.
C++ Language Changes
--------------------
+C++14 Feature Support
+^^^^^^^^^^^^^^^^^^^^^
+- Sized deallocation is enabled by default in C++14 onwards.
+
C++20 Feature Support
^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/include/clang/Basic/SizedDeallocation.h b/clang/include/clang/Basic/SizedDeallocation.h
new file mode 100644
index 00000000000000..e1a353de3bdfba
--- /dev/null
+++ b/clang/include/clang/Basic/SizedDeallocation.h
@@ -0,0 +1,44 @@
+//===------- SizedDellocation.h - Sized Deallocation ------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Defines a function that returns the minimum OS versions supporting
+/// C++14's sized deallocation functions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_SIZEDDEALLOCATION_H
+#define LLVM_CLANG_BASIC_SIZEDDEALLOCATION_H
+
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/VersionTuple.h"
+#include "llvm/TargetParser/Triple.h"
+
+namespace clang {
+inline llvm::VersionTuple sizedDeallocMinVersion(llvm::Triple::OSType OS) {
+ switch (OS) {
+ default:
+ break;
+ case llvm::Triple::Darwin:
+ case llvm::Triple::MacOSX: // Earliest supporting version is 10.12.
+ return llvm::VersionTuple(10U, 12U);
+ case llvm::Triple::IOS:
+ case llvm::Triple::TvOS: // Earliest supporting version is 10.0.0.
+ return llvm::VersionTuple(10U);
+ case llvm::Triple::WatchOS: // Earliest supporting version is 3.0.0.
+ return llvm::VersionTuple(3U);
+ case llvm::Triple::ZOS:
+ return llvm::VersionTuple(); // All z/OS versions have no support.
+ }
+
+ llvm_unreachable("Unexpected OS");
+}
+
+} // end namespace clang
+
+#endif // LLVM_CLANG_BASIC_SIZEDDEALLOCATION_H
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 3e857f4e6faf87..9550d679142158 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -603,6 +603,7 @@ class MarshallingInfoVisibility<KeyPathAndMacro kpm, code default>
// Key paths that are constant during parsing of options with the same key path prefix.
defvar cplusplus = LangOpts<"CPlusPlus">;
defvar cpp11 = LangOpts<"CPlusPlus11">;
+defvar cpp14 = LangOpts<"CPlusPlus14">;
defvar cpp17 = LangOpts<"CPlusPlus17">;
defvar cpp20 = LangOpts<"CPlusPlus20">;
defvar c99 = LangOpts<"C99">;
@@ -3327,10 +3328,10 @@ defm relaxed_template_template_args : BoolFOption<"relaxed-template-template-arg
"Enable C++17 relaxed template template argument matching">,
NegFlag<SetFalse>>;
defm sized_deallocation : BoolFOption<"sized-deallocation",
- LangOpts<"SizedDeallocation">, DefaultFalse,
+ LangOpts<"SizedDeallocation">, Default<cpp14.KeyPath>,
PosFlag<SetTrue, [], [ClangOption, CC1Option],
"Enable C++14 sized global deallocation functions">,
- NegFlag<SetFalse>>;
+ NegFlag<SetFalse>, BothFlags<[], [ClangOption, CC1Option]>>;
defm aligned_allocation : BoolFOption<"aligned-allocation",
LangOpts<"AlignedAllocation">, Default<cpp17.KeyPath>,
PosFlag<SetTrue, [], [ClangOption], "Enable C++17 aligned allocation functions">,
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 858d20fbfac015..ab74f41cbd0a30 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -7105,10 +7105,15 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
Args.addOptInFlag(CmdArgs, options::OPT_frelaxed_template_template_args,
options::OPT_fno_relaxed_template_template_args);
- // -fsized-deallocation is off by default, as it is an ABI-breaking change for
- // most platforms.
- Args.addOptInFlag(CmdArgs, options::OPT_fsized_deallocation,
- options::OPT_fno_sized_deallocation);
+ // -fsized-deallocation is on by default in C++14 onwards and otherwise off
+ // by default.
+ if (Arg *A = Args.getLastArg(options::OPT_fsized_deallocation,
+ options::OPT_fno_sized_deallocation)) {
+ if (A->getOption().matches(options::OPT_fsized_deallocation))
+ CmdArgs.push_back("-fsized-deallocation");
+ else
+ CmdArgs.push_back("-fno-sized-deallocation");
+ }
// -faligned-allocation is on by default in C++17 onwards and otherwise off
// by default.
diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index c7682c7f1d3379..d3dc07a4408c84 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -12,6 +12,7 @@
#include "CommonArgs.h"
#include "clang/Basic/AlignedAllocation.h"
#include "clang/Basic/ObjCRuntime.h"
+#include "clang/Basic/SizedDeallocation.h"
#include "clang/Config/config.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
@@ -2912,9 +2913,36 @@ static bool sdkSupportsBuiltinModules(const Darwin::DarwinPlatformKind &TargetPl
}
}
-void Darwin::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
- llvm::opt::ArgStringList &CC1Args,
- Action::OffloadKind DeviceOffloadKind) const {
+bool Darwin::isSizedDeallocationUnavailable() const {
+ llvm::Triple::OSType OS;
+
+ if (isTargetMacCatalyst())
+ return TargetVersion < sizedDeallocMinVersion(llvm::Triple::MacOSX);
+ switch (TargetPlatform) {
+ case MacOS: // Earlier than 10.12.
+ OS = llvm::Triple::MacOSX;
+ break;
+ case IPhoneOS:
+ OS = llvm::Triple::IOS;
+ break;
+ case TvOS: // Earlier than 10.0.
+ OS = llvm::Triple::TvOS;
+ break;
+ case WatchOS: // Earlier than 3.0.
+ OS = llvm::Triple::WatchOS;
+ break;
+ case DriverKit: // Always available.
+ return false;
+ case XROS: // Always available.
+ return false;
+ }
+
+ return TargetVersion < sizedDeallocMinVersion(OS);
+}
+
+void Darwin::addClangTargetOptions(
+ const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
+ Action::OffloadKind DeviceOffloadKind) const {
// Pass "-faligned-alloc-unavailable" only when the user hasn't manually
// enabled or disabled aligned allocations.
if (!DriverArgs.hasArgNoClaim(options::OPT_faligned_allocation,
@@ -2922,6 +2950,13 @@ void Darwin::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
isAlignedAllocationUnavailable())
CC1Args.push_back("-faligned-alloc-unavailable");
+ // Pass "-fno-sized-deallocation" only when the user hasn't manually enabled
+ // or disabled sized deallocations.
+ if (!DriverArgs.hasArgNoClaim(options::OPT_fsized_deallocation,
+ options::OPT_fno_sized_deallocation) &&
+ isSizedDeallocationUnavailable())
+ CC1Args.push_back("-fno-sized-deallocation");
+
addClangCC1ASTargetOptions(DriverArgs, CC1Args);
// Enable compatibility mode for NSItemProviderCompletionHandler in
diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
index 10d4b69e5d5f10..b45279ecedeb25 100644
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -511,6 +511,10 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
/// targeting.
bool isAlignedAllocationUnavailable() const;
+ /// Return true if c++14 sized deallocation functions are not implemented in
+ /// the c++ standard library of the deployment target we are targeting.
+ bool isSizedDeallocationUnavailable() const;
+
void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const override;
diff --git a/clang/lib/Driver/ToolChains/ZOS.cpp b/clang/lib/Driver/ToolChains/ZOS.cpp
index d5fc7b8ef562a6..074e0556ecd2ad 100644
--- a/clang/lib/Driver/ToolChains/ZOS.cpp
+++ b/clang/lib/Driver/ToolChains/ZOS.cpp
@@ -36,6 +36,12 @@ void ZOS::addClangTargetOptions(const ArgList &DriverArgs,
if (!DriverArgs.hasArgNoClaim(options::OPT_faligned_allocation,
options::OPT_fno_aligned_allocation))
CC1Args.push_back("-faligned-alloc-unavailable");
+
+ // Pass "-fno-sized-deallocation" only when the user hasn't manually enabled
+ // or disabled sized deallocations.
+ if (!DriverArgs.hasArgNoClaim(options::OPT_fsized_deallocation,
+ options::OPT_fno_sized_deallocation))
+ CC1Args.push_back("-fno-sized-deallocation");
}
void zos::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
diff --git a/clang/test/AST/ast-dump-expr-json.cpp b/clang/test/AST/ast-dump-expr-json.cpp
index 0fb07b0b434cc3..bdd5ea19e41835 100644
--- a/clang/test/AST/ast-dump-expr-json.cpp
+++ b/clang/test/AST/ast-dump-expr-json.cpp
@@ -2333,7 +2333,7 @@ void TestNonADLCall3() {
// CHECK-NEXT: "kind": "FunctionDecl",
// CHECK-NEXT: "name": "operator delete",
// CHECK-NEXT: "type": {
-// CHECK-NEXT: "qualType": "void (void *) noexcept"
+// CHECK-NEXT: "qualType": "void (void *, unsigned long) noexcept"
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
diff --git a/clang/test/AST/ast-dump-expr.cpp b/clang/test/AST/ast-dump-expr.cpp
index 69e65e22d61d0d..de88f29bc4b0a9 100644
--- a/clang/test/AST/ast-dump-expr.cpp
+++ b/clang/test/AST/ast-dump-expr.cpp
@@ -164,7 +164,7 @@ void UnaryExpressions(int *p) {
// CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:8> 'int *' lvalue ParmVar 0x{{[^ ]*}} 'p' 'int *'
::delete p;
- // CHECK: CXXDeleteExpr 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:12> 'void' global Function 0x{{[^ ]*}} 'operator delete' 'void (void *) noexcept'
+ // CHECK: CXXDeleteExpr 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:12> 'void' global Function 0x{{[^ ]*}} 'operator delete' 'void (void *, unsigned long) noexcept'
// CHECK-NEXT: ImplicitCastExpr
// CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:12> 'int *' lvalue ParmVar 0x{{[^ ]*}} 'p' 'int *'
diff --git a/clang/test/AST/ast-dump-stmt-json.cpp b/clang/test/AST/ast-dump-stmt-json.cpp
index 667a12a0120244..a473d17da94244 100644
--- a/clang/test/AST/ast-dump-stmt-json.cpp
+++ b/clang/test/AST/ast-dump-stmt-json.cpp
@@ -994,7 +994,7 @@ void TestDependentGenericSelectionExpr(Ty T) {
// CHECK-NEXT: "kind": "FunctionDecl",
// CHECK-NEXT: "name": "operator delete",
// CHECK-NEXT: "type": {
-// CHECK-NEXT: "qualType": "void (void *) noexcept"
+// CHECK-NEXT: "qualType": "void (void *, unsigned long) noexcept"
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
@@ -1369,7 +1369,7 @@ void TestDependentGenericSelectionExpr(Ty T) {
// CHECK-NEXT: "kind": "FunctionDecl",
// CHECK-NEXT: "name": "operator delete",
// CHECK-NEXT: "type": {
-// CHECK-NEXT: "qualType": "void (void *) noexcept"
+// CHECK-NEXT: "qualType": "void (void *, unsigned long) noexcept"
// CHECK-NEXT: }
// CHECK-NEXT: },
// CHECK-NEXT: "inner": [
@@ -1722,7 +1722,6 @@ void TestDependentGenericSelectionExpr(Ty T) {
// CHECK-NEXT: "end": {}
// CHECK-NEXT: },
// CHECK-NEXT: "isImplicit": true,
-// CHECK-NEXT: "isUsed": true,
// CHECK-NEXT: "name": "operator delete",
// CHECK-NEXT: "mangledName": "_ZdlPv",
// CHECK-NEXT: "type": {
@@ -1810,6 +1809,126 @@ void TestDependentGenericSelectionExpr(Ty T) {
// CHECK-NEXT: }
+// CHECK-NOT: {{^}}Dumping
+// CHECK: "kind": "FunctionDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "isUsed": true,
+// CHECK-NEXT: "name": "operator delete",
+// CHECK-NEXT: "mangledName": "_ZdlPvm",
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void (void *, unsigned long) noexcept"
+// CHECK-NEXT: },
+// CHECK-NEXT: "inner": [
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void *"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "unsigned long"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "VisibilityAttr",
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "implicit": true,
+// CHECK-NEXT: "visibility": "default"
+// CHECK-NEXT: }
+// CHECK-NEXT: ]
+// CHECK-NEXT: }
+
+// CHECK-NOT: {{^}}Dumping
+// CHECK: "kind": "FunctionDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "name": "operator delete",
+// CHECK-NEXT: "mangledName": "_ZdlPvmSt11align_val_t",
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void (void *, unsigned long, std::align_val_t) noexcept"
+// CHECK-NEXT: },
+// CHECK-NEXT: "inner": [
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void *"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "unsigned long"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "std::align_val_t"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "VisibilityAttr",
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "implicit": true,
+// CHECK-NEXT: "visibility": "default"
+// CHECK-NEXT: }
+// CHECK-NEXT: ]
+// CHECK-NEXT: }
+
// CHECK-NOT: {{^}}Dumping
// CHECK: "kind": "FunctionDecl",
// CHECK-NEXT: "loc": {},
@@ -1906,6 +2025,125 @@ void TestDependentGenericSelectionExpr(Ty T) {
// CHECK-NEXT: }
+// CHECK-NOT: {{^}}Dumping
+// CHECK: "kind": "FunctionDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "name": "operator delete[]",
+// CHECK-NEXT: "mangledName": "_ZdaPvm",
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void (void *, unsigned long) noexcept"
+// CHECK-NEXT: },
+// CHECK-NEXT: "inner": [
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void *"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "unsigned long"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "VisibilityAttr",
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "implicit": true,
+// CHECK-NEXT: "visibility": "default"
+// CHECK-NEXT: }
+// CHECK-NEXT: ]
+// CHECK-NEXT: }
+
+// CHECK-NOT: {{^}}Dumping
+// CHECK: "kind": "FunctionDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "name": "operator delete[]",
+// CHECK-NEXT: "mangledName": "_ZdaPvmSt11align_val_t",
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void (void *, unsigned long, std::align_val_t) noexcept"
+// CHECK-NEXT: },
+// CHECK-NEXT: "inner": [
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: "loc": {},
+// CHECK-NEXT: "range": {
+// CHECK-NEXT: "begin": {},
+// CHECK-NEXT: "end": {}
+// CHECK-NEXT: },
+// CHECK-NEXT: "isImplicit": true,
+// CHECK-NEXT: "type": {
+// CHECK-NEXT: "qualType": "void *"
+// CHECK-NEXT: }
+// CHECK-NEXT: },
+// CHECK-NEXT: {
+// CHECK-NEXT: "id": "0x{{.*}}",
+// CHECK-NEXT: "kind": "ParmVarDecl",
+// CHECK-NEXT: ...
[truncated]
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...d/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp
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I used a different approach for CWG292 test that avoids passing -fsized-deallocation in 98 and 11 modes, as this is not a conforming mode for them. Now changes to DR tests look good :) I hope you don't mind me pushing commits to your PR.
(I'm the author of CWG292 test)
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@Endilll Thanks! I don't mind at all. All I wish is that we can push this forward. :-) It seems that Windows buildbot still fails this time, I just hope someone in charge can help me to figure it out whether we need more code changes, or it's just because Windows environment doesn't support sized-deallocators (failed tests are all about Interpreter). |
MaskRay
requested changes
Mar 7, 2024
| options::OPT_fno_sized_deallocation); | ||
| // -fsized-deallocation is on by default in C++14 onwards and otherwise off | ||
| // by default. | ||
| if (Arg *A = Args.getLastArg(options::OPT_fsized_deallocation, |
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We only need -fno-sized-deallocation for CC1Option. When neither option is specified, assume implicit -fsized-deallocation.
The code change in Darwin.cpp should be changed to a function that decides whether the default is yes or no.
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Sorry I may not understand what you mean, can I leave it unchanged as this code is just like -faligned-allocation. We can change it later.
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See my other comment. I think this should be fixed.
ldionne
reviewed
Mar 8, 2024
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The version map seems correct to me. I have a comment about z/OS appearing in a place it shouldn't but apart from that LGTM. Heads up @ahatanak you probably want to have a quick look as well since you did a lot of work around aligned allocation on Apple platforms a few years back.
mordante
approved these changes
Mar 9, 2024
cor3ntin
reviewed
Mar 10, 2024
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| <span id="n3778">(7): The user must supply definitions of the sized deallocation | ||
| functions, either by providing them explicitly or by using a C++ standard library | ||
| that does. <code>libstdc++</code> added these functions in version 5.0, and | ||
| <code>libc++</code> added them in version 3.7. The user can also use the | ||
| <code>-fno-sized-deallocation</code> option to disable sized deallocation. |
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@mordante @AaronBallman do we still support either of these? I'm inclined to removing the comment entirely.
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I'm not entirely sure what the question is. If the question is do we allow users to provide their own definition of the sized allocation function, then the answer is yes. http://eel.is/c++draft/replacement.functions.
I'm not sure whether we still need to mention the versions of libc++ and libstdc++; I expect when people use Clang 19 they have a somewhat recent std lib. (Especially since building Clang requires C++17.)
This has been done. |
ldionne
approved these changes
Mar 12, 2024
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There is a Windows failure that I can't reproduce: https://buildkite.com/llvm-project/github-pull-requests/builds/46331 |
I'm not certain what's going on yet, but it smells a bit like the interpreter needs to know about sized deallocations now being on by default (this may be exposing an existing bug rather than introducing a new one). CC @vgvassilev |
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This is causing new/delete mismatch https://lab.llvm.org/buildbot/#/builders/168/builds/20063 |
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@ldionne looks like a bug in std::string fixes that place, but breaks others |
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Delete uses __get_long_cap() And if __set_long_cap() provided with odd number, and __endian_factor == 2, __get_long_cap() will be short by 1. |
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This change is also causing a failure on our internal Windows builder, and a public Windows bot: |
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We are also seeing the Windows failure. Given that there appear to be 2 separate problems, this patch should probably be reverted rather than trying to fix-forward. |
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Lets revert #90299 to recover bots before the weekend. |
Many thanks for reverting it and fixing one of the failures! |
It seems that we need to remove these symbols from the CMakeLists.txt of clang-repl. |
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Since C++14 has been released for about nine years and most standard libraries have implemented sized deallocation functions, it's time to make this feature default again. This is another try of https://reviews.llvm.org/D112921. The original commit cf5a8b4 was reverted by 2e5035a due to some failures (see llvm#83774). Fixes llvm#60061
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Apr 30, 2024
This is detected by asan after #83774 New assert already fails a lot of tests even without asan.
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This is detected by asan after llvm#83774 New assert already fails a lot of tests even without asan.
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May 2, 2024
This is detected by asan after #83774 Allocation size will be divided by `__endian_factor` before storing. If it's not aligned, we will not be able to recover allocation size to pass into `__alloc_traits::deallocate`. we have code like this ``` auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); __p = __allocation.ptr; __set_long_cap(__allocation.count); void __set_long_cap(size_type __s) _NOEXCEPT { __r_.first().__l.__cap_ = __s / __endian_factor; __r_.first().__l.__is_long_ = true; } size_type __get_long_cap() const _NOEXCEPT { return __r_.first().__l.__cap_ * __endian_factor; } inline ~basic_string() { __annotate_delete(); if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); } ``` 1. __recommend() -> even size 2. `std::__allocate_at_least(__alloc(), __recommend(__sz) + 1)` - > not even size 3. ` __set_long_cap() `- > lose one bit of size for __endian_factor == 2 (see `/ __endian_factor`) 4. `__alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap())` -> uses even size (see `__get_long_cap`)
wangpc-pp
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May 22, 2024
Since C++14 has been released for about nine years and most standard libraries have implemented sized deallocation functions, it's time to make this feature default again. This is another try of https://reviews.llvm.org/D112921. The original commit cf5a8b4 was reverted by 2e5035a due to some failures (see llvm#83774). Fixes llvm#60061
wangpc-pp
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May 22, 2024
#90373) Since C++14 has been released for about nine years and most standard libraries have implemented sized deallocation functions, it's time to make this feature default again. This is another try of https://reviews.llvm.org/D112921. The original commit cf5a8b4 was reverted by 2e5035a due to some failures (see #83774). Fixes #60061
llvmbot
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Jun 12, 2024
This is detected by asan after llvm#83774 Allocation size will be divided by `__endian_factor` before storing. If it's not aligned, we will not be able to recover allocation size to pass into `__alloc_traits::deallocate`. we have code like this ``` auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); __p = __allocation.ptr; __set_long_cap(__allocation.count); void __set_long_cap(size_type __s) _NOEXCEPT { __r_.first().__l.__cap_ = __s / __endian_factor; __r_.first().__l.__is_long_ = true; } size_type __get_long_cap() const _NOEXCEPT { return __r_.first().__l.__cap_ * __endian_factor; } inline ~basic_string() { __annotate_delete(); if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); } ``` 1. __recommend() -> even size 2. `std::__allocate_at_least(__alloc(), __recommend(__sz) + 1)` - > not even size 3. ` __set_long_cap() `- > lose one bit of size for __endian_factor == 2 (see `/ __endian_factor`) 4. `__alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap())` -> uses even size (see `__get_long_cap`) (cherry picked from commit d129ea8)
vitalybuka
pushed a commit
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Jun 12, 2024
#90373) Since C++14 has been released for about nine years and most standard libraries have implemented sized deallocation functions, it's time to make this feature default again. This is another try of https://reviews.llvm.org/D112921. The original commit cf5a8b4 was reverted by 2e5035a due to some failures (see #83774). Fixes #60061
vitalybuka
added a commit
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Jun 12, 2024
This is detected by asan after #83774 Allocation size will be divided by `__endian_factor` before storing. If it's not aligned, we will not be able to recover allocation size to pass into `__alloc_traits::deallocate`. we have code like this ``` auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); __p = __allocation.ptr; __set_long_cap(__allocation.count); void __set_long_cap(size_type __s) _NOEXCEPT { __r_.first().__l.__cap_ = __s / __endian_factor; __r_.first().__l.__is_long_ = true; } size_type __get_long_cap() const _NOEXCEPT { return __r_.first().__l.__cap_ * __endian_factor; } inline ~basic_string() { __annotate_delete(); if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); } ``` 1. __recommend() -> even size 2. `std::__allocate_at_least(__alloc(), __recommend(__sz) + 1)` - > not even size 3. ` __set_long_cap() `- > lose one bit of size for __endian_factor == 2 (see `/ __endian_factor`) 4. `__alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap())` -> uses even size (see `__get_long_cap`) (cherry picked from commit d129ea8)
llvmbot
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Jun 15, 2024
This is detected by asan after llvm#83774 Allocation size will be divided by `__endian_factor` before storing. If it's not aligned, we will not be able to recover allocation size to pass into `__alloc_traits::deallocate`. we have code like this ``` auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); __p = __allocation.ptr; __set_long_cap(__allocation.count); void __set_long_cap(size_type __s) _NOEXCEPT { __r_.first().__l.__cap_ = __s / __endian_factor; __r_.first().__l.__is_long_ = true; } size_type __get_long_cap() const _NOEXCEPT { return __r_.first().__l.__cap_ * __endian_factor; } inline ~basic_string() { __annotate_delete(); if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); } ``` 1. __recommend() -> even size 2. `std::__allocate_at_least(__alloc(), __recommend(__sz) + 1)` - > not even size 3. ` __set_long_cap() `- > lose one bit of size for __endian_factor == 2 (see `/ __endian_factor`) 4. `__alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap())` -> uses even size (see `__get_long_cap`) (cherry picked from commit d129ea8)
owenca
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that referenced
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Jun 22, 2024
This is detected by asan after llvm#83774 Allocation size will be divided by `__endian_factor` before storing. If it's not aligned, we will not be able to recover allocation size to pass into `__alloc_traits::deallocate`. we have code like this ``` auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); __p = __allocation.ptr; __set_long_cap(__allocation.count); void __set_long_cap(size_type __s) _NOEXCEPT { __r_.first().__l.__cap_ = __s / __endian_factor; __r_.first().__l.__is_long_ = true; } size_type __get_long_cap() const _NOEXCEPT { return __r_.first().__l.__cap_ * __endian_factor; } inline ~basic_string() { __annotate_delete(); if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); } ``` 1. __recommend() -> even size 2. `std::__allocate_at_least(__alloc(), __recommend(__sz) + 1)` - > not even size 3. ` __set_long_cap() `- > lose one bit of size for __endian_factor == 2 (see `/ __endian_factor`) 4. `__alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap())` -> uses even size (see `__get_long_cap`) (cherry picked from commit d129ea8)
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Since C++14 has been released for about nine years and most standard
libraries have implemented sized deallocation functions, it's time to
make this feature default again.
This is another try of https://reviews.llvm.org/D112921.
Some buildbots failed last time and I hope the owners may help me to
find the causes as I may not have such environments.
Fixes #60061