Remove old sync-upstream.yml, superseded by Cold-Air-Networks/mirror-sync

This path transforms `vector.contract(A, B, Acc)` into
`vector.contract(A, B, 0) + Acc` to decouple the contraction computation
from the accumulator update for contractions over the loop.

libc/src/__support/common.h

@@ -17,6 +17,12 @@
 #include "src/__support/macros/config.h"
 #include "src/__support/macros/properties/architectures.h"
 #include "src/__support/macros/properties/compiler.h"
+#include "src/__support/macros/properties/os.h"
+
+#if defined(__APPLE__) || (defined(LIBC_TARGET_OS_IS_WINDOWS) &&               \
+                           defined(LIBC_TARGET_ARCH_IS_X86_32))
+#define LIBC_TARGET_USES_LEADING_UNDERSCORE
+#endif
 
 #ifndef LLVM_LIBC_FUNCTION_ATTR
 #define LLVM_LIBC_FUNCTION_ATTR
@@ -44,25 +50,24 @@
 
 #define LLVM_LIBC_ATTR(name) EXPAND_THEN_SECOND(LLVM_LIBC_FUNCTION_ATTR_##name)
 
-// At the moment, [[gnu::alias()]] is not supported on MacOS, and it is needed
-// to cleanly export and alias the C++ symbol `LIBC_NAMESPACE::func` with the C
-// symbol `func`.  So for public packaging on MacOS, we will only export the C
-// symbol.  Moreover, a C symbol `func` in macOS is mangled as `_func`.
+// Export both `func` and `LIBC_NAMESPACE::func` using an alias symbol.
+// This does not work on platfors with LIBC_TARGET_USES_LEADING_UNDERSCORE
+// so there this only exports `_func`.
 #if defined(LIBC_COPT_PUBLIC_PACKAGING) && !defined(LIBC_COMPILER_IS_MSVC)
-#ifndef __APPLE__
+#ifndef LIBC_TARGET_USES_LEADING_UNDERSCORE
 #define LLVM_LIBC_FUNCTION_IMPL_4(type, name, arglist, c_alias)                \
   LLVM_LIBC_ATTR(name)                                                         \
   LLVM_LIBC_FUNCTION_ATTR decltype(LIBC_NAMESPACE::name)                       \
       __##name##_impl__ asm(c_alias);                                          \
   decltype(LIBC_NAMESPACE::name) name [[gnu::alias(c_alias)]];                 \
   type __##name##_impl__ arglist
-#else // __APPLE__
+#else // LIBC_TARGET_USES_LEADING_UNDERSCORE
 #define LLVM_LIBC_FUNCTION_IMPL_4(type, name, arglist, c_alias)                \
   LLVM_LIBC_ATTR(name)                                                         \
   LLVM_LIBC_FUNCTION_ATTR decltype(LIBC_NAMESPACE::name) name asm(             \
       "_" c_alias);                                                            \
   type name arglist
-#endif // __APPLE__
+#endif // LIBC_TARGET_USES_LEADING_UNDERSCORE
 
 #else  // LIBC_COPT_PUBLIC_PACKAGING
 #define LLVM_LIBC_FUNCTION_IMPL_4(type, name, arglist, c_alias)                \
@@ -78,25 +83,23 @@
   GET_FIFTH(__VA_ARGS__, LLVM_LIBC_FUNCTION_IMPL_4, LLVM_LIBC_FUNCTION_IMPL_3, \
             GET_NOTHING)(__VA_ARGS__)
 
-// At the moment, [[gnu::alias()]] is not supported on MacOS, and it is needed
-// to cleanly export and alias the C++ symbol `LIBC_NAMESPACE::func` with the C
-// symbol `func`.  So for public packaging on MacOS, we will only export the C
-// symbol.  Moreover, a C symbol `func` in macOS is mangled as `_func`.
+// See comment on LLVM_LIBC_FUNCTION_IMPL_4 for why this checks
+// LIBC_TARGET_USES_LEADING_UNDERSCORE.
 #if defined(LIBC_COPT_PUBLIC_PACKAGING) && !defined(LIBC_COMPILER_IS_MSVC)
-#ifndef __APPLE__
+#ifndef LIBC_TARGET_USES_LEADING_UNDERSCORE
 #define LLVM_LIBC_VARIABLE_IMPL(type, name)                                    \
   LLVM_LIBC_ATTR(name)                                                         \
   extern LLVM_LIBC_VARIABLE_ATTR decltype(LIBC_NAMESPACE::name)                \
       __##name##_impl__ asm(#name);                                            \
   extern decltype(LIBC_NAMESPACE::name) name [[gnu::alias(#name)]];            \
   type __##name##_impl__
-#else // __APPLE__
+#else // LIBC_TARGET_USES_LEADING_UNDERSCORE
 #define LLVM_LIBC_VARIABLE_IMPL(type, name)                                    \
   LLVM_LIBC_ATTR(name)                                                         \
   extern LLVM_LIBC_VARIABLE_ATTR decltype(LIBC_NAMESPACE::name) name asm(      \
       "_" #name);                                                              \
   type name
-#endif // __APPLE__
+#endif // LIBC_TARGET_USES_LEADING_UNDERSCORE
 #else  // LIBC_COPT_PUBLIC_PACKAGING
 #define LLVM_LIBC_VARIABLE_IMPL(type, name) type name
 #endif // LIBC_COPT_PUBLIC_PACKAGING

libc/src/__support/math/expm1.h

@@ -126,13 +126,13 @@ LIBC_INLINE DoubleDouble poly_approx_dd(const DoubleDouble &dx) {
 }
 
 #ifdef DEBUGDEBUG
-std::ostream &operator<<(std::ostream &OS, const DFloat128 &r) {
+LIBC_INLINE std::ostream &operator<<(std::ostream &OS, const DFloat128 &r) {
   OS << (r.sign == Sign::NEG ? "-(" : "(") << r.mantissa.val[0] << " + "
      << r.mantissa.val[1] << " * 2^64) * 2^" << r.exponent << "\n";
   return OS;
 }
 
-std::ostream &operator<<(std::ostream &OS, const DoubleDouble &r) {
+LIBC_INLINE std::ostream &operator<<(std::ostream &OS, const DoubleDouble &r) {
   OS << std::hexfloat << "(" << r.hi << " + " << r.lo << ")"
      << std::defaultfloat << "\n";
   return OS;

libc/src/__support/math/tan.h

@@ -108,8 +108,9 @@ LIBC_INLINE double tan_eval(const DoubleDouble &u, DoubleDouble &result) {
 // Calculation a / b = a * (1/b) for DFloat128.
 // Using the initial approximation of q ~ (1/b), then apply 2 Newton-Raphson
 // iterations, before multiplying by a.
-[[maybe_unused]] DFloat128 newton_raphson_div(const DFloat128 &a, DFloat128 b,
-                                              double q) {
+[[maybe_unused]] LIBC_INLINE DFloat128 newton_raphson_div(const DFloat128 &a,
+                                                          DFloat128 b,
+                                                          double q) {
   DFloat128 q0(q);
   LIBC_BIT_CAST_CONSTEXPR_VAR DFloat128 TWO(2.0);
   b.sign = (b.sign == Sign::POS) ? Sign::NEG : Sign::POS;

libc/test/src/__support/FPUtil/CMakeLists.txt

@@ -49,6 +49,7 @@ add_fp_unittest(
     libc.hdr.limits_macros
     libc.src.__support.FPUtil.fenv_impl
     libc.src.__support.FPUtil.float128
+    libc.src.__support.macros.properties.types
 )
 
 # TODO: Temporally disable bfloat16 test until MPCommon target is updated

libc/test/src/__support/FPUtil/float128_test.cpp

@@ -9,6 +9,7 @@
 #include "hdr/limits_macros.h"
 #include "src/__support/FPUtil/FEnvImpl.h"
 #include "src/__support/FPUtil/float128.h"
+#include "src/__support/macros/properties/types.h"
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
@@ -142,3 +143,25 @@ TEST(LlvmLibcFloat128Test, FromIntegralTypes) {
   ASSERT_EQ(static_cast<unsigned>(Float128(2147483648.0)), 2147483648U);
   EXPECT_EQ(LIBC_NAMESPACE::fputil::test_except(FE_INVALID), 0);
 }
+
+#ifdef LIBC_TYPES_HAS_FLOAT128
+TEST(LlvmLibcFloat128Test, NativeFloat128Conversion) {
+  // native to emulated float128
+  ASSERT_TRUE(Float128(static_cast<float128>(0.0)) == Float128(0.0));
+  ASSERT_TRUE(Float128(static_cast<float128>(1.5)) == Float128(1.5));
+  ASSERT_TRUE(Float128(static_cast<float128>(-1.5)) == Float128(-1.5));
+  ASSERT_TRUE(Float128(static_cast<float128>(1e300)) == Float128(1e300));
+
+  // emulated to native float128
+  ASSERT_TRUE(static_cast<float128>(Float128(0.0)) ==
+              static_cast<float128>(0.0));
+  ASSERT_TRUE(static_cast<float128>(Float128(3.14)) ==
+              static_cast<float128>(3.14));
+  ASSERT_TRUE(static_cast<float128>(Float128(-3.14)) ==
+              static_cast<float128>(-3.14));
+  ASSERT_TRUE(static_cast<float128>(FPBits::inf(Sign::POS).get_val()) ==
+              static_cast<float128>(FPBits::inf(Sign::POS).get_val()));
+  ASSERT_TRUE(static_cast<float128>(Float128(1e-300)) ==
+              static_cast<float128>(1e-300));
+}
+#endif // LIBC_TYPES_HAS_FLOAT128

lld/ELF/Arch/SPARCV9.cpp

@@ -166,6 +166,20 @@ void SPARCV9::scanSectionImpl(InputSectionBase &sec, Relocs<RelTy> rels,
       expr = R_GOT_OFF;
       break;
 
+    // Optimize the GOT load to an add of the symbol's GOT-relative address if
+    // applicable. Exclude absolute symbol, which can be arbitrarily far. %l7
+    // points at .got, which must be retained.
+    case R_SPARC_GOTDATA_OP_HIX22:
+    case R_SPARC_GOTDATA_OP_LOX10:
+    case R_SPARC_GOTDATA_OP:
+      if (sym.isPreemptible || isAbsolute(sym)) {
+        expr = R_GOT_OFF;
+      } else {
+        ctx.in.got->hasGotOffRel.store(true, std::memory_order_relaxed);
+        expr = R_GOTREL;
+      }
+      break;
+
     // TLS LE relocations:
     case R_SPARC_TLS_LE_HIX22:
     case R_SPARC_TLS_LE_LOX10:
@@ -322,6 +336,24 @@ void SPARCV9::relocate(uint8_t *loc, const Relocation &rel,
     // T-simm13
     write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff) | 0x1C00);
     break;
+  case R_SPARC_GOTDATA_OP_HIX22: {
+    // V-imm22. sethi encodes the complement of a negative value, which the
+    // paired xor undoes, so the encodable range is 33 bits.
+    checkInt(ctx, loc, val, 33, rel);
+    uint64_t v = int64_t(val) < 0 ? ~val : val;
+    write32be(loc, (read32be(loc) & ~0x003fffff) | ((v >> 10) & 0x003fffff));
+    break;
+  }
+  case R_SPARC_GOTDATA_OP_LOX10:
+    // T-simm13. Only a negative value needs the sign extension bits.
+    write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff) |
+                       (int64_t(val) < 0 ? 0x1c00 : 0));
+    break;
+  case R_SPARC_GOTDATA_OP:
+    // ldx [%rs1 + %rs2], %rd -> add %rs1, %rs2, %rd
+    if (rel.expr == R_GOTREL)
+      write32be(loc, (read32be(loc) & 0x3e07c01f) | 0x80000000);
+    break;
   default:
     llvm_unreachable("unknown relocation");
   }

lld/ELF/Config.h

@@ -770,6 +770,10 @@ struct Ctx : CommonLinkerContext {
   unsigned scriptSymOrderCounter = 1;
   llvm::DenseMap<const Symbol *, unsigned> scriptSymOrder;
 
+  // Used to assert removeUnusedSyntheticSections-removed sections cannot become
+  // needed again.
+  SmallVector<SyntheticSection *, 0> removedSyntheticSections;
+
   // The set of TOC entries (.toc + addend) for which we should not apply
   // toc-indirect to toc-relative relaxation. const Symbol * refers to the
   // STT_SECTION symbol associated to the .toc input section.

lld/ELF/Writer.cpp

@@ -1747,6 +1747,17 @@ template <class ELFT> void Writer<ELFT>::optimizeBasicBlockJumps() {
       is->trim();
 }
 
+// Sections that finalizeAddressDependentContent may add to.
+static bool mayGrowLate(Ctx &ctx, SyntheticSection *sec) {
+  if (sec != ctx.in.relaDyn.get())
+    return false;
+  // Relocations may move here from .relr.auth.dyn.
+  if (ctx.in.relrAuthDyn && ctx.in.relrAuthDyn->isNeeded())
+    return true;
+  // PPC64PILongBranchThunk adds a relative relocation for its .branch_lt entry.
+  return ctx.in.ppc64LongBranchTarget && ctx.arg.picThunk;
+}
+
 // In order to allow users to manipulate linker-synthesized sections,
 // we had to add synthetic sections to the input section list early,
 // even before we make decisions whether they are needed. This allows
@@ -1758,7 +1769,8 @@ template <class ELFT> void Writer<ELFT>::optimizeBasicBlockJumps() {
 //
 // To deal with the above problem, this function is called after
 // scanRelocations is called to remove synthetic sections that turn
-// out to be empty.
+// out to be empty. It runs before finalizeAddressDependentContent, which may
+// add to a section mayGrowLate reports.
 static void removeUnusedSyntheticSections(Ctx &ctx) {
   // All input synthetic sections that can be empty are placed after
   // all regular ones. Reverse iterate to find the first synthetic section
@@ -1773,17 +1785,13 @@ static void removeUnusedSyntheticSections(Ctx &ctx) {
   auto end =
       std::remove_if(start, ctx.inputSections.end(), [&](InputSectionBase *s) {
         auto *sec = cast<SyntheticSection>(s);
-        if (sec->getParent() && sec->isNeeded())
-          return false;
-        // .relr.auth.dyn relocations may be moved to .rela.dyn in
-        // finalizeAddressDependentContent, making .rela.dyn no longer empty.
-        // Conservatively keep .rela.dyn. .relr.auth.dyn can be made empty, but
-        // we would fail to remove it here.
-        if (ctx.arg.emachine == EM_AARCH64 && ctx.arg.relrPackDynRelocs &&
-            sec == ctx.in.relaDyn.get() && ctx.in.relrAuthDyn &&
-            ctx.in.relrAuthDyn->isNeeded())
+        if ((sec->getParent() && sec->isNeeded()) || mayGrowLate(ctx, sec))
           return false;
         unused.insert(sec);
+        // LinkerScript::discard clears the parent. Losing later additions to
+        // such a section is intended.
+        if (sec->getParent())
+          ctx.removedSyntheticSections.push_back(sec);
         return true;
       });
   ctx.inputSections.erase(end, ctx.inputSections.end());
@@ -2117,6 +2125,10 @@ template <class ELFT> void Writer<ELFT>::finalizeSections() {
   //    values. They also might change after adding the thunks.
   finalizeAddressDependentContent();
 
+  // A section dropped as unneeded must have stayed unneeded.
+  assert(llvm::none_of(ctx.removedSyntheticSections,
+                       [](SyntheticSection *sec) { return sec->isNeeded(); }));
+
   // All information needed for OutputSection part of Map file is available.
   if (errCount(ctx))
     return;

lld/MachO/InputSection.cpp

@@ -204,16 +204,20 @@ void ConcatInputSection::foldIdentical(ConcatInputSection *copy,
   for (auto &copySym : copy->symbols)
     copySym->identicalCodeFoldingKind = foldKind;
 
-  symbols.insert(symbols.end(), copy->symbols.begin(), copy->symbols.end());
-  copy->symbols.clear();
-
-  // Remove duplicate compact unwind info for symbols at the same address.
-  if (symbols.empty())
+  if (copy->symbols.empty())
     return;
-  for (auto it = symbols.begin() + 1; it != symbols.end(); ++it) {
+  auto *it = copy->symbols.begin();
+  // The first symbol in the merged section (symbols.front()) must keep its
+  // unwind entry. If this section is empty, the copy's first symbol becomes the
+  // new front, so we skip clearing it.
+  if (symbols.empty())
+    ++it;
+  for (; it != copy->symbols.end(); ++it) {
     assert((*it)->value == 0);
     (*it)->originalUnwindEntry = nullptr;
   }
+  symbols.insert(symbols.end(), copy->symbols.begin(), copy->symbols.end());
+  copy->symbols.clear();
 }
 
 void ConcatInputSection::writeTo(uint8_t *buf) {

lld/test/ELF/ppc64-long-branch-rel14.s

@@ -11,11 +11,20 @@
 
 # RUN: llvm-mc -filetype=obj -triple=powerpc64le %s -o %t.o
 # RUN: ld.lld -pie -T %t.lds %t.o -o %t
-# RUN: llvm-readelf -r %t | FileCheck --check-prefix=SEC %s
+# RUN: llvm-readelf -r %t | FileCheck --check-prefix=SEC-PI -DOFF0=a0b0 -DOFF1=a0b8 %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
+
+## --pic-veneer selects PI long-branch thunks in a non-PIC link.
+# RUN: ld.lld --pic-veneer -T %t.lds %t.o -o %t
+# RUN: llvm-readelf -r %t | FileCheck --check-prefix=SEC-PI -DOFF0=a010 -DOFF1=a018 %s
 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
 
 # SEC: There are no relocations in this file.
 
+# SEC-PI:      Relocation section '.rela.dyn' {{.*}} contains 2 entries:
+# SEC-PI:      {{0+}}[[OFF0]] {{[0-9a-f]+}} R_PPC64_RELATIVE a004
+# SEC-PI-NEXT: {{0+}}[[OFF1]] {{[0-9a-f]+}} R_PPC64_RELATIVE a010
+
 # CHECK-LABEL: <_start>:
 # CHECK-NEXT:  2000: bt 2, 0x2040
 # CHECK-NEXT:        bt+ 2, 0x2040

lld/test/ELF/ppc64-pcrel-call-to-pcrel.s

@@ -28,16 +28,16 @@
 # RUN: llvm-readelf -s %t | FileCheck %s --check-prefix=SYMBOL-GLOBAL
 # RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
 
-# SYMBOL:      2: 0000000010010000 0 NOTYPE LOCAL DEFAULT 5 callee1_stother0_default
-# SYMBOL-NEXT: 3: 0000000010010004 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 5 caller1
-# SYMBOL-NEXT: 4: 0000000010020000 0 NOTYPE LOCAL DEFAULT 6 func_local
-# SYMBOL-NEXT: 5: 0000000010020004 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 6 callee2_stother1_default
-# SYMBOL-NEXT: 6: 000000001002000c 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 6 caller2
-# SYMBOL-NEXT: 7: 0000000010030000 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 7 caller3
-# SYMBOL-NEXT: 8: 0000000010040000 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 8 caller4
-# SYMBOL-NEXT: 9: 0000000010040008 0 NOTYPE LOCAL DEFAULT 9 func_extern
-# SYMBOL-NEXT: 10: 000000001004000c 0 NOTYPE LOCAL HIDDEN 9 callee3_stother0_hidden
-# SYMBOL-NEXT: 11: 0000000010040010 0 NOTYPE LOCAL HIDDEN [<other: 0x22>] 9 callee4_stother1_hidden
+# SYMBOL:      2: 0000000010010000 0 NOTYPE LOCAL DEFAULT 6 callee1_stother0_default
+# SYMBOL-NEXT: 3: 0000000010010004 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 6 caller1
+# SYMBOL-NEXT: 4: 0000000010020000 0 NOTYPE LOCAL DEFAULT 7 func_local
+# SYMBOL-NEXT: 5: 0000000010020004 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 7 callee2_stother1_default
+# SYMBOL-NEXT: 6: 000000001002000c 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 7 caller2
+# SYMBOL-NEXT: 7: 0000000010030000 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 8 caller3
+# SYMBOL-NEXT: 8: 0000000010040000 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 9 caller4
+# SYMBOL-NEXT: 9: 0000000010040008 0 NOTYPE LOCAL DEFAULT 10 func_extern
+# SYMBOL-NEXT: 10: 000000001004000c 0 NOTYPE LOCAL HIDDEN 10 callee3_stother0_hidden
+# SYMBOL-NEXT: 11: 0000000010040010 0 NOTYPE LOCAL HIDDEN [<other: 0x22>] 10 callee4_stother1_hidden
 
 # SYMBOL-GLOBAL:      2: 0000000010010004 0 NOTYPE LOCAL DEFAULT [<other: 0x20>] 1 caller1
 # SYMBOL-GLOBAL-NEXT: 3: 0000000010020000 0 NOTYPE LOCAL DEFAULT 2 func_local

lld/test/ELF/sparcv9-gotdata.s

@@ -0,0 +1,141 @@
+# REQUIRES: sparc
+## Test R_SPARC_GOTDATA_OP_HIX22, R_SPARC_GOTDATA_OP_LOX10 and R_SPARC_GOTDATA_OP.
+## The GOT load is optimized to an add of the symbol's GOT-relative address
+## unless the symbol is preemptible or absolute.
+
+# RUN: rm -rf %t && split-file %s %t && cd %t
+# RUN: llvm-mc -filetype=obj -triple=sparcv9 a.s -o a.o
+# RUN: llvm-mc -filetype=obj -triple=sparcv9 b.s -o b.o
+# RUN: llvm-mc -filetype=obj -triple=sparcv9 c.s -o c.o
+# RUN: llvm-mc -filetype=obj -triple=sparcv9 ifunc.s -o ifunc.o
+
+# RUN: ld.lld -shared a.o c.o -o a.so
+# RUN: llvm-readelf -S -r a.so | FileCheck %s --check-prefix=RELOC
+# RUN: llvm-objdump -d -j .text --no-show-raw-insn --no-print-imm-hex a.so | FileCheck %s
+
+# RELOC:      [ 8] .got PROGBITS 0000000000200390 {{[0-9a-f]+}} 000020
+# RELOC:      Relocation section '.rela.dyn' {{.*}} contains 1 entries:
+# RELOC:      0000000000200398 {{.*}} R_SPARC_GLOB_DAT {{.*}} foo + 0
+
+## foo is preemptible, so the GOT load stays.
+## .got[1] - _GLOBAL_OFFSET_TABLE_ = 0x200398 - 0x200390 = 8.
+# CHECK-LABEL: <_start>:
+# CHECK-NEXT:   sethi 0, %l1
+# CHECK-NEXT:   xor %l1, 8, %l1
+# CHECK-NEXT:   ldx [%l7+%l1], %l2
+## hid0 - _GLOBAL_OFFSET_TABLE_ = 0x3003b0 - 0x200390 = 0x100020.
+# CHECK-NEXT:   sethi 1024, %g1
+# CHECK-NEXT:   xor %g1, 32, %g1
+# CHECK-NEXT:   add %l7, %g1, %g1
+## hid1 - _GLOBAL_OFFSET_TABLE_ = 0x1002ec - 0x200390 = -0x1000a4. sethi holds
+## the complement, which the sign-extended xor operand undoes.
+# CHECK-NEXT:   sethi 1024, %o2
+# CHECK-NEXT:   xor %o2, -164, %o2
+# CHECK-NEXT:   add %i0, %o2, %i5
+## An undefined symbol and an absolute symbol both have an absolute address, so
+## neither is optimized.
+# CHECK-NEXT:   sethi 0, %l1
+# CHECK-NEXT:   xor %l1, 16, %l1
+# CHECK-NEXT:   ldx [%l7+%l1], %l2
+# CHECK-NEXT:   sethi 0, %g4
+# CHECK-NEXT:   xor %g4, 24, %g4
+# CHECK-NEXT:   ldx [%l7+%g4], %o3
+
+## foo is not preemptible in an executable and is optimized as well. undefweak
+## and absolute keep the GOT load in every mode.
+# RUN: ld.lld a.o c.o -o a
+# RUN: llvm-objdump -d -j .text --no-show-raw-insn --no-print-imm-hex a | FileCheck %s --check-prefix=NOPIE
+# NOPIE-LABEL: <_start>:
+# NOPIE-NEXT:   sethi 1024, %l1
+# NOPIE-NEXT:   xor %l1, -4, %l1
+# NOPIE-NEXT:   add %l7, %l1, %l2
+# NOPIE:        sethi 0, %l1
+# NOPIE-NEXT:   xor %l1, 8, %l1
+# NOPIE-NEXT:   ldx [%l7+%l1], %l2
+# NOPIE-NEXT:   sethi 0, %g4
+# NOPIE-NEXT:   xor %g4, 16, %g4
+# NOPIE-NEXT:   ldx [%l7+%g4], %o3
+
+## .got holds nothing but the header, yet must be kept: %l7 points at it.
+# RUN: ld.lld -shared b.o -o b.so
+# RUN: llvm-readelf -S b.so | FileCheck %s --check-prefix=HEADER
+# HEADER: [ 7] .got PROGBITS 00000000002002b8 {{[0-9a-f]+}} 000008
+
+# RUN: not ld.lld -shared ifunc.o 2>&1 | FileCheck %s --check-prefix=IFUNC --implicit-check-not=error:
+# IFUNC: error: {{.*}}relocation R_SPARC_WDISP19 out of range
+
+## The optimization is decided before addresses are known, so an out-of-range
+## offset is an error rather than a fallback to the GOT load. The offset is
+## reported as signed, not as the complement the sethi encodes. Only hid0, in
+## .data, is out of range; the other symbols stay next to .got.
+# RUN: not ld.lld -shared a.o c.o --section-start=.text=0x10000 --section-start=.got=0x20000 \
+# RUN:   --section-start=.data=0x200000000 2>&1 | FileCheck %s --check-prefix=ERR -DVAL=8589803520 --implicit-check-not=error:
+# RUN: not ld.lld -shared a.o c.o --section-start=.data=0x10000 --section-start=.text=0x200000000 \
+# RUN:   --section-start=.got=0x200020000 2>&1 | FileCheck %s --check-prefix=ERR -DVAL=-8590000128 --implicit-check-not=error:
+# ERR: error: a.o:(.text+0xc): relocation R_SPARC_GOTDATA_OP_HIX22 out of range: [[VAL]] is not in [-4294967296, 4294967295]; references 'hid0'
+
+#--- a.s
+.text
+.globl _start
+_start:
+  sethi %gdop_hix22(foo), %l1
+  xor   %l1, %gdop_lox10(foo), %l1
+  ldx   [%l7 + %l1], %l2, %gdop(foo)
+
+  sethi %gdop_hix22(hid0), %g1
+  xor   %g1, %gdop_lox10(hid0), %g1
+  ldx   [%l7 + %g1], %g1, %gdop(hid0)
+
+## The add keeps rs1, rs2 and rd of the load, and ld is optimized like ldx.
+  sethi %gdop_hix22(hid1), %o2
+  xor   %o2, %gdop_lox10(hid1), %o2
+  ld    [%i0 + %o2], %i5, %gdop(hid1)
+
+  sethi %gdop_hix22(undefweak), %l1
+  xor   %l1, %gdop_lox10(undefweak), %l1
+  ldx   [%l7 + %l1], %l2, %gdop(undefweak)
+
+  sethi %gdop_hix22(absolute), %g4
+  xor   %g4, %gdop_lox10(absolute), %g4
+  ldx   [%l7 + %g4], %o3, %gdop(absolute)
+
+.globl foo, hid0, hid1
+.hidden hid0, hid1
+foo:
+hid1:
+  nop
+
+.weak undefweak
+.hidden undefweak
+
+.data
+hid0:
+  .xword 0
+
+#--- b.s
+.globl _start
+_start:
+  sethi %gdop_hix22(local), %l1
+  xor   %l1, %gdop_lox10(local), %l1
+  ldx   [%l7 + %l1], %l2, %gdop(local)
+local:
+  nop
+
+#--- c.s
+## Separate file to test %gdop_lox10(absolute) relocations in a.s
+.globl absolute
+.hidden absolute
+absolute = 0x1234
+
+#--- ifunc.s
+.globl _start
+_start:
+  sethi %gdop_hix22(ifunc), %l1
+  xor   %l1, %gdop_lox10(ifunc), %l1
+  ldx   [%l7 + %l1], %l2, %gdop(ifunc)
+
+.globl ifunc
+.hidden ifunc
+.type ifunc, @gnu_indirect_function
+ifunc:
+  nop

lld/test/MachO/icf-scale-same-class.s

@@ -0,0 +1,37 @@
+# REQUIRES: x86
+# RUN: rm -rf %t*
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t.o
+# RUN: %lld -lSystem --icf=all -o %t %t.o
+# RUN: llvm-objdump --macho --section-headers %t | FileCheck %s --check-prefix=SECT
+# RUN: llvm-objdump --macho --syms %t | FileCheck %s --check-prefix=SYMS
+
+## Every body folds into one, so __text holds a single 6-byte body plus _main
+## rather than the 3 MiB (0x30000d) the unfolded copies occupy.
+# SECT:      Idx Name          Size
+# SECT-NEXT: 0 __text        00000009
+
+## The sentinels bracket the group, so checking that the first and last members
+## of the class share an address covers the whole run of folds.
+# SYMS-DAG: [[#%.16x,F:]] g     F __TEXT,__text _f_first
+# SYMS-DAG: [[#F]]        g     F __TEXT,__text _f_last
+
+.subsections_via_symbols
+.text
+.p2align 2
+
+.globl _f_first
+_f_first:; movl $7, %eax; ret
+
+## 64 Ki identical function landing in one equivalence class.
+.rept 65536
+  .globl _f\+
+  _f\+:; movl $$7, %eax; ret
+.endr
+
+.globl _f_last
+_f_last:; movl $7, %eax; ret
+
+.globl _main
+_main:
+  ret

lldb/docs/resources/test.md

@@ -137,6 +137,35 @@ the test should be run or not.
 @skipTestIfFn(checking_function_name)
 ```
 
+### Skipped versus unsupported
+
+A test that doesn't run does so for one of two very different reasons, and the
+decorator you pick says which:
+
+* The test **can never** run in this configuration. A test for Mach-O debug
+  maps has nothing to say on Linux; a test that calls `fork()` has nothing to
+  say on Windows. Use the `require*` family. These are reported as
+  **UNSUPPORTED**.
+
+* The test **ought to** run in this configuration but doesn't work yet. Use the
+  `skipIf*` / `skipUnless*` family. These are reported as **SKIPPED**, which
+  keeps them visible as work still to be done.
+
+```python
+@requireDarwin      # inherently Darwin-only: reported UNSUPPORTED elsewhere
+@skipIfWindows      # ought to work on Windows, currently broken: reported SKIPPED
+```
+
+The `require*` decorators mirror the `skip*` ones one-for-one:
+`requireDarwin` / `requireNotDarwin`, `requireLinux` / `requireNotLinux`,
+`requireWindows` / `requireNotWindows`, plus `requirePOSIX`, `requireSignals`,
+`requireNotWasm`, `requireDarwinHost`, and the general
+`requirePlatform(oslist)` / `requireNotPlatform(oslist)`.
+
+Reach for `require*` when the test is tied to a platform-specific file format,
+API, or OS feature. If the test is merely untested or broken somewhere, keep
+`skipIf*` so nobody mistakes a bug for a design decision.
+
 In addition to providing a lot more flexibility when it comes to writing the
 test, the API test also allow for much more complex scenarios when it comes to
 building inferiors. Every test has its own `Makefile`, most of them only a

lldb/packages/Python/lldbsuite/test/decorators.py

@@ -30,6 +30,7 @@ from lldbsuite.support import temp_file
 from lldbsuite.test import lldbplatform
 from lldbsuite.test import lldbplatformutil
 from lldbsuite.test.cpu_feature import CPUFeature
+from lldbsuite.test.skip_reason import UnsupportedReason
 
 
 class DecorateMode:
@@ -1123,6 +1124,126 @@ def skipUnlessPlatform(oslist):
     )
 
 
+##############################################################################
+# Platform *requirement* decorators.
+#
+# These express "this test can only ever run here", as opposed to the skipIf /
+# skipUnless family which means "this test ought to run here but is broken".
+# Tests turned off by a `require*` decorator are reported as UNSUPPORTED; tests
+# turned off by a `skip*` decorator are reported as SKIPPED. See
+# `lldbsuite.test.skip_reason` for how the distinction is carried.
+#
+# Reach for these when the test is inherently tied to a platform: it debugs a
+# platform-specific file format, drives a platform-specific API, or exercises
+# an OS feature that simply doesn't exist elsewhere. If the test is merely
+# untested or broken somewhere, keep using skipIf / skipUnless so it stays
+# visible as work to be done.
+##############################################################################
+
+
+def requirePlatform(oslist):
+    """Mark the item as runnable only on the listed target platforms.
+
+    Unlike `skipUnlessPlatform`, other platforms are reported as UNSUPPORTED
+    rather than SKIPPED.
+    """
+    return unittest.skipUnless(
+        lldbplatformutil.getPlatform() in oslist,
+        UnsupportedReason("requires one of %s" % (", ".join(oslist))),
+    )
+
+
+def requireNotPlatform(oslist):
+    """Mark the item as inherently inapplicable to the listed target platforms.
+
+    Unlike `skipIfPlatform`, the listed platforms are reported as UNSUPPORTED
+    rather than SKIPPED.
+    """
+    return unittest.skipIf(
+        lldbplatformutil.getPlatform() in oslist,
+        UnsupportedReason("unsupported on %s" % (", ".join(oslist))),
+    )
+
+
+def requireDarwin(func):
+    """Mark the item as inherently Darwin-only (Mach-O, debug maps, Darwin
+    kernel/runtime APIs, ...). Non-Darwin targets report UNSUPPORTED."""
+    return requirePlatform(lldbplatform.translate(lldbplatform.darwin_all))(func)
+
+
+def requireNotDarwin(func):
+    """Mark the item as inherently inapplicable to Darwin targets."""
+    return requireNotPlatform(lldbplatform.translate(lldbplatform.darwin_all))(func)
+
+
+def requireLinux(func):
+    """Mark the item as inherently Linux-only (procfs, Linux-specific syscalls,
+    ...). Other targets report UNSUPPORTED."""
+    return requirePlatform(["linux"])(func)
+
+
+def requireNotLinux(func):
+    """Mark the item as inherently inapplicable to Linux targets."""
+    return requireNotPlatform(["linux"])(func)
+
+
+def requireWindows(func):
+    """Mark the item as inherently Windows-only (PE/COFF, Win32 APIs, ...).
+    Other targets report UNSUPPORTED."""
+    return requirePlatform(["windows"])(func)
+
+
+def requireNotWindows(func):
+    """Mark the item as inherently inapplicable to Windows targets.
+
+    Use this for tests built on POSIX-only concepts: fork/exec semantics,
+    POSIX signals, ptrace, ELF/Mach-O specifics, shell pipelines, and so on.
+    """
+    return requireNotPlatform(["windows"])(func)
+
+
+def requirePOSIX(func):
+    """Mark the item as requiring a POSIX target.
+
+    A shorthand for `requireNotWindows` that reads better on tests whose
+    dependency is POSIX semantics generally rather than anything about
+    Windows specifically.
+    """
+    return requireNotPlatform(["windows"])(func)
+
+
+def requireSignals(func):
+    """Mark the item as requiring POSIX signal support on the target."""
+    return requireNotPlatform(["windows", "wasip1", "wasi"])(func)
+
+
+def requireNotWasm(func):
+    """Mark the item as inherently inapplicable to WebAssembly targets.
+
+    WebAssembly has no processes, no signals, no shared libraries and no
+    ptrace-style debugging, so a large amount of the test suite can never
+    apply to it.
+    """
+    return requireNotPlatform(["wasip1", "wasi"])(func)
+
+
+def requireHostPlatform(oslist):
+    """Mark the item as runnable only on the listed *host* platforms."""
+    return unittest.skipUnless(
+        lldbplatformutil.getHostPlatform() in oslist,
+        UnsupportedReason("requires one of %s as host" % (", ".join(oslist))),
+    )
+
+
+def requireDarwinHost(func):
+    """Mark the item as requiring a Darwin host, regardless of target.
+
+    Use for tests that drive host-side Darwin facilities: `xcrun`, the
+    simulator runtimes, dsymutil, the LLDB.framework layout, and so on.
+    """
+    return requireHostPlatform(lldbplatform.translate(lldbplatform.darwin_all))(func)
+
+
 def skipIfTargetDoesNotSupportThreads():
     """Skip tests that require thread support (e.g. pthreads)."""
     platform = lldbplatformutil.getPlatform()

lldb/packages/Python/lldbsuite/test/dotest.py

@@ -1255,6 +1255,12 @@ def run_suite():
 
     configuration.failed = not result.wasSuccessful()
 
+    if getattr(result, "skipped", None):
+        sys.stderr.write(
+            "Skip breakdown (unsupported=%d, skipped=%d)\n"
+            % (result.countUnsupported(), result.countSkipped())
+        )
+
     if configuration.sdir_has_content and configuration.verbose:
         sys.stderr.write(
             "Session logs for test failures/errors/unexpected successes"

lldb/packages/Python/lldbsuite/test/skip_reason.py

@@ -0,0 +1,17 @@
+"""
+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
+
+Distinguishes the two reasons a test can end up not running.
+"""
+
+
+class UnsupportedReason(str):
+    """A skip reason meaning "this test can never run here", not "this test is
+    broken here". Reported as UNSUPPORTED rather than SKIPPED."""
+
+
+def is_unsupported(reason):
+    """Return True if *reason* marks a test as unsupported rather than skipped."""
+    return isinstance(reason, UnsupportedReason)

lldb/packages/Python/lldbsuite/test/test_result.py

@@ -16,6 +16,7 @@ import unittest
 
 # LLDB Modules
 from . import configuration
+from .skip_reason import UnsupportedReason, is_unsupported
 from lldbsuite.test_event import build_exception
 
 
@@ -162,10 +163,18 @@ class LLDBTestResult(unittest.TextTestResult):
         getattr(test, test._testMethodName).__func__.__unittest_skip__ = True
         getattr(
             test, test._testMethodName
-        ).__func__.__unittest_skip_why__ = (
+        ).__func__.__unittest_skip_why__ = UnsupportedReason(
             "test case does not fall in any category of interest for this run"
         )
 
+    def countUnsupported(self):
+        """Number of skipped tests that can never run in this configuration."""
+        return sum(1 for _, reason in self.skipped if is_unsupported(reason))
+
+    def countSkipped(self):
+        """Number of skipped tests that ought to run here but don't work yet."""
+        return len(self.skipped) - self.countUnsupported()
+
     def checkExclusion(self, exclusion_list, name):
         if exclusion_list:
             import re
@@ -282,9 +291,13 @@ class LLDBTestResult(unittest.TextTestResult):
         method = getattr(test, "markSkippedTest", None)
         if method:
             method()
+        # A test turned off by a `require*` decorator can never run in this
+        # configuration, so report it as UNSUPPORTED. Anything else is a test
+        # that ought to run here but doesn't work yet: report it as SKIPPED.
+        status = "UNSUPPORTED" if is_unsupported(reason) else "SKIPPED"
         self.stream.write(
-            "UNSUPPORTED: LLDB (%s) :: %s (%s) \n"
-            % (self._config_string(test), str(test), reason)
+            "%s: LLDB (%s) :: %s (%s) \n"
+            % (status, self._config_string(test), str(test), reason)
         )
 
     def addUnexpectedSuccess(self, test):

lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp

@@ -34,10 +34,12 @@
 #include "lldb/Host/HostInfo.h"
 #include "lldb/Target/DynamicLoader.h"
 #include "lldb/Target/Process.h"
+#include "lldb/Utility/ErrorMessages.h"
 #include "lldb/Utility/Status.h"
 
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/Support/ConvertUTF.h"
+#include "llvm/Support/FormatVariadic.h"
 
 using namespace lldb;
 using namespace lldb_private;
@@ -433,7 +435,10 @@ uint32_t PlatformWindows::DoLoadImage(Process *process,
   if (result != eExpressionCompleted) {
     error = Status::FromError(diagnostics.GetAsError(
         eExpressionSetupError,
-        "LoadLibrary error: failed to execute LoadLibrary helper:"));
+        llvm::formatv("failed to execute LoadLibrary helper "
+                      "({0}):",
+                      toString(result))
+            .str()));
     return LLDB_INVALID_IMAGE_TOKEN;
   }
 
@@ -941,7 +946,10 @@ extern "C" {
   ExpressionResults result = UserExpression::Evaluate(
       context, options, expression, kLoaderDecls, value);
   if (result != eExpressionCompleted)
-    return value ? value->GetError().Clone() : Status("unknown error");
+    return value
+               ? value->GetError().Clone()
+               : Status::FromErrorStringWithFormatv(
+                     "failed to execute loader helper ({0})", toString(result));
 
   if (value && value->GetError().Fail())
     return value->GetError().Clone();

lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp

@@ -840,22 +840,116 @@ def main(f):
     return ArgInfo(count, varargs)
 )";
 
-Expected<PythonCallable::ArgInfo> PythonCallable::GetArgInfo() const {
-  ArgInfo result = {};
-  if (!IsValid())
-    return nullDeref();
-
+// inspect.signature() is deeply recursive and expensive in C-stack terms;
+// reentrant scripted callbacks dispatched through GetArgInfo() can turn
+// that into a fatal stack overflow instead of a catchable Python
+// RecursionError. GetArgInfo() never calls this itself; callers fall back
+// to it explicitly when they need to handle callables its cheaper,
+// attribute-only approach can't (e.g. builtins).
+Expected<PythonCallable::ArgInfo>
+PythonCallable::GetArgInfoFromInspectSignature(const PythonCallable &callable) {
+  PythonCallable::ArgInfo result = {};
   // no need to synchronize access to this global, we already have the GIL
   static PythonScript get_arg_info(get_arg_info_script);
-  Expected<PythonObject> pyarginfo = get_arg_info(*this);
+  Expected<PythonObject> pyarginfo = get_arg_info(callable);
   if (!pyarginfo)
     return pyarginfo.takeError();
   long long count =
       cantFail(As<long long>(pyarginfo.get().GetAttribute("count")));
   bool has_varargs =
       cantFail(As<bool>(pyarginfo.get().GetAttribute("has_varargs")));
-  result.max_positional_args = has_varargs ? ArgInfo::UNBOUNDED : count;
+  result.max_positional_args =
+      has_varargs ? PythonCallable::ArgInfo::UNBOUNDED : count;
+  return result;
+}
 
+// GetArgInfo()'s branches, top to bottom (`func` is what each branch ends up
+// introspecting; the final step is always func.__code__.co_argcount/co_flags):
+//
+//   callable
+//   |-- has __self__          -> func = __func__           (bound method;
+//   |                             fails for slot wrappers, e.g. (1).__add__)
+//   |-- has __code__ already  -> func = callable            (plain function)
+//   `-- neither
+//       |-- is a class
+//       |   |-- __init__ has __code__ -> func = __init__
+//       |   `-- else: check __new__ too (object.__init__ is lenient about
+//       |       extra args once __new__ is overridden)
+//       |       |-- __new__ has __code__ -> func = __new__
+//       |       `-- else                  -> ArgInfo{0} (object's defaults)
+//       `-- is an instance
+//           `-- func = __call__ (unwrap __func__ if bound)
+//               `-- no __code__ -> error (e.g. a builtin)
+Expected<PythonCallable::ArgInfo> PythonCallable::GetArgInfo() const {
+  if (!IsValid())
+    return nullDeref();
+
+  PythonObject func = *this;
+  bool implicit_first_arg = false;
+  if (HasAttribute("__self__")) {
+    implicit_first_arg = true;
+    Expected<PythonObject> func_or_err = GetAttribute("__func__");
+    if (!func_or_err)
+      return func_or_err.takeError();
+    func = *func_or_err;
+  } else if (!HasAttribute("__code__")) {
+    implicit_first_arg = true;
+    if (PyType_Check(m_py_obj)) {
+      Expected<PythonObject> init_or_err = GetAttribute("__init__");
+      if (!init_or_err)
+        return init_or_err.takeError();
+      func = *init_or_err;
+      if (!func.HasAttribute("__code__")) {
+        // __init__ is still object.__init__. A class may customize
+        // __new__ instead and leave __init__ untouched, which makes
+        // object.__init__ lenient about extra arguments -- so check
+        // __new__ too before concluding there are none.
+        Expected<PythonObject> new_or_err = GetAttribute("__new__");
+        if (!new_or_err)
+          return new_or_err.takeError();
+        func = *new_or_err;
+        if (!func.HasAttribute("__code__"))
+          return ArgInfo{0};
+      }
+    } else {
+      Expected<PythonObject> call_or_err = GetAttribute("__call__");
+      if (!call_or_err)
+        return call_or_err.takeError();
+      func = *call_or_err;
+      if (func.HasAttribute("__self__")) {
+        Expected<PythonObject> inner_or_err = func.GetAttribute("__func__");
+        if (!inner_or_err)
+          return inner_or_err.takeError();
+        func = *inner_or_err;
+      }
+      if (!func.HasAttribute("__code__"))
+        return llvm::createStringError("__call__ has no __code__");
+    }
+  }
+
+  Expected<PythonObject> code_or_err = func.GetAttribute("__code__");
+  if (!code_or_err)
+    return code_or_err.takeError();
+  PythonObject code = *code_or_err;
+
+  Expected<long long> argcount =
+      As<long long>(code.GetAttribute("co_argcount"));
+  if (!argcount)
+    return argcount.takeError();
+  Expected<long long> flags = As<long long>(code.GetAttribute("co_flags"));
+  if (!flags)
+    return flags.takeError();
+
+  ArgInfo result = {};
+  // Mirrors CPython's CO_VARARGS from <code.h>, which isn't reliably
+  // visible across the Python versions/platforms this file builds against.
+  constexpr long long kCoFlagVarArgs = 0x04;
+  if (*flags & kCoFlagVarArgs) {
+    result.max_positional_args = ArgInfo::UNBOUNDED;
+  } else {
+    long long count = *argcount - (implicit_first_arg ? 1 : 0);
+    result.max_positional_args = count > 0 ? static_cast<unsigned>(count) : 0;
+  }
   return result;
 }
 

lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h

@@ -615,6 +615,15 @@ public:
 
   llvm::Expected<ArgInfo> GetArgInfo() const;
 
+  // Always derives ArgInfo via a Python-level inspect.signature() call,
+  // regardless of whether the callable's argument count/varargs bit could
+  // have been read directly off its data attributes. GetArgInfo() prefers
+  // the cheaper attribute-based path and only falls back to this for
+  // callables it can't introspect that way (e.g. builtins); exposed
+  // separately so that fallback behavior can be tested directly.
+  static llvm::Expected<ArgInfo>
+  GetArgInfoFromInspectSignature(const PythonCallable &callable);
+
   PythonObject operator()();
 
   PythonObject operator()(std::initializer_list<PyObject *> args);

lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp

@@ -1300,6 +1300,14 @@ ScriptInterpreterPythonImpl::GetMaxPositionalArgumentsForCallable(
                                    callable_name.str().c_str());
   }
   llvm::Expected<PythonCallable::ArgInfo> arg_info = pfunc.GetArgInfo();
+  if (!arg_info) {
+    // `-f` may point at a builtin, unlike other GetArgInfo() callers.
+    LLDB_LOG_ERROR(GetLog(LLDBLog::Script), arg_info.takeError(),
+                   "GetArgInfo failed for callable {1}, falling back to "
+                   "inspect.signature: {0}",
+                   callable_name);
+    arg_info = PythonCallable::GetArgInfoFromInspectSignature(pfunc);
+  }
   if (!arg_info)
     return arg_info.takeError();
   return arg_info.get().max_positional_args;

lldb/test/API/commands/register/register_command/TestRegisters.py

@@ -717,7 +717,6 @@ class RegisterCommandsTestCase(TestBase):
         self.expect("register write pc 0", substrs=[err_msg], error=True)
         self.expect("register info pc", substrs=[err_msg], error=True)
 
-    @expectedFailureDarwin(bugnumber="github.com/llvm/llvm-project/issues/213386")
     def test_case_insensitivity(self):
         """
         Register names, their aliases and any generic names like "sp" and "ra"

lldb/test/API/linux/aarch64/aarch32_compat/TestAArch64LinuxAArch32Compat.py

@@ -16,7 +16,7 @@ class AArch64LinuxAArch32Compat(TestBase):
     @skipIfRemote
     @skipUnlessArch("aarch64")
     @skipIfLLVMTargetMissing("ARM")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_aarch32_compat(self):
         self.build()
         test_program = self.getBuildArtifact("a.out")

lldb/test/API/linux/aarch64/fpmr/TestAArch64LinuxFPMR.py

@@ -16,7 +16,7 @@ class AArch64LinuxFPMR(TestBase):
     EXPECTED_FPMR_FIELDS = ["LSCALE2 = 42", "F8S1 = FP8_E4M3 | 0x4"]
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_fpmr_register_live(self):
         if not self.isAArch64FPMR():
             self.skipTest("FPMR must be present.")

lldb/test/API/linux/aarch64/gcs/TestAArch64LinuxGCS.py

@@ -13,7 +13,7 @@ class AArch64LinuxGCSTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_region(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")
@@ -62,7 +62,7 @@ class AArch64LinuxGCSTestCase(TestBase):
         # cleanly if GCS was manually enabled.
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_fault(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")
@@ -118,7 +118,7 @@ class AArch64LinuxGCSTestCase(TestBase):
         return gcs_features_enabled, gcs_features_locked, gcspr_el0
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_registers(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")
@@ -239,7 +239,7 @@ class AArch64LinuxGCSTestCase(TestBase):
             ],
         )
 
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_expression_simple(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")
@@ -303,7 +303,7 @@ class AArch64LinuxGCSTestCase(TestBase):
         self.expect(expr_cmd, substrs=["(unsigned long) 1"])
         self.check_gcs_registers(*before)
 
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_expression_disable_gcs(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")
@@ -343,7 +343,7 @@ class AArch64LinuxGCSTestCase(TestBase):
         enabled &= ~1
         self.check_gcs_registers(enabled, locked, spr_el0)
 
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_gcs_expression_enable_gcs(self):
         if not self.isAArch64GCS():
             self.skipTest("Target must support GCS.")

lldb/test/API/linux/aarch64/mte_memory_region/TestAArch64LinuxMTEMemoryRegion.py

@@ -14,7 +14,7 @@ class AArch64LinuxMTEMemoryRegionTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_regions(self):
         if not self.isAArch64MTE():

lldb/test/API/linux/aarch64/mte_tag_access/TestAArch64LinuxMTEMemoryTagAccess.py

@@ -44,7 +44,7 @@ class AArch64LinuxMTEMemoryTagAccessTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_tag_read(self):
         self.setup_mte_test()
@@ -209,7 +209,7 @@ class AArch64LinuxMTEMemoryTagAccessTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_tag_write(self):
         self.setup_mte_test()
@@ -431,7 +431,7 @@ class AArch64LinuxMTEMemoryTagAccessTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_memory_read_tag_display(self):
         self.setup_mte_test()
@@ -588,7 +588,7 @@ class AArch64LinuxMTEMemoryTagAccessTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     # Repeating options currently does not work, see
     # https://github.com/llvm/llvm-project/issues/192057.
@@ -631,7 +631,7 @@ class AArch64LinuxMTEMemoryTagAccessTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_memory_find(self):
         """Test the --show-tags option with memory find."""

lldb/test/API/linux/aarch64/mte_tag_faults/TestAArch64LinuxMTEMemoryTagFaults.py

@@ -38,7 +38,7 @@ class AArch64LinuxMTEMemoryTagFaultsTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_tag_fault_sync(self):
         self.setup_mte_test("sync")
@@ -57,7 +57,7 @@ class AArch64LinuxMTEMemoryTagFaultsTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipUnlessAArch64MTELinuxCompiler
     def test_mte_tag_fault_async(self):
         self.setup_mte_test("async")

lldb/test/API/linux/aarch64/non_address_bit_code_break/TestAArch64LinuxNonAddressBitCodeBreak.py

@@ -54,11 +54,11 @@ class AArch64LinuxNonAddressBitCodeBreak(TestBase):
 
     # AArch64 Linux always enables the top byte ignore feature
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_software_break(self):
         self.do_tagged_break(False)
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_hardware_break(self):
         self.do_tagged_break(True)

lldb/test/API/linux/aarch64/non_address_bit_memory_access/TestAArch64LinuxNonAddressBitMemoryAccess.py

@@ -45,7 +45,7 @@ class AArch64LinuxNonAddressBitMemoryAccessTestCase(TestBase):
         self.expect("memory read {}".format(read_from), substrs=[data])
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_non_address_bit_memory_read_write_cmds(self):
         self.setup_test()
 
@@ -82,7 +82,7 @@ class AArch64LinuxNonAddressBitMemoryAccessTestCase(TestBase):
         self.assertEqual(data, buf_content)
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_non_address_bit_memory_read_write_api_process(self):
         self.setup_test()
         buf, buf_with_non_address = self.get_ptr_values()
@@ -121,7 +121,7 @@ class AArch64LinuxNonAddressBitMemoryAccessTestCase(TestBase):
         self.assertEqual(0x5634120042444C4C, ptr)
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_non_address_bit_memory_read_write_api_target(self):
         self.setup_test()
         buf, buf_with_non_address = self.get_ptr_values()
@@ -147,7 +147,7 @@ class AArch64LinuxNonAddressBitMemoryAccessTestCase(TestBase):
         # Read<type>FromMemory are in Target but not SBTarget so no tests for those.
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_non_address_bit_memory_caching(self):
         # The read/write tests above do exercise the cache but this test
         # only cares that the cache sees buf and buf_with_non_address

lldb/test/API/linux/aarch64/permission_overlay/TestAArch64LinuxPOE.py

@@ -35,7 +35,7 @@ class AArch64LinuxPOE(TestBase):
     )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_poe_live(self):
         if not self.isAArch64POE():
             self.skipTest("POE must be present.")

lldb/test/API/linux/aarch64/tagged_memory_access/TestAArch64LinuxTaggedMemoryAccess.py

@@ -38,7 +38,7 @@ class AArch64LinuxTaggedMemoryReadTestCase(TestBase):
         )
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_tagged_memory_read(self):
         self.setup_test()
 
@@ -64,7 +64,7 @@ class AArch64LinuxTaggedMemoryReadTestCase(TestBase):
         self.expect("memory read", patterns=[tagged_addr_pattern], matching=False)
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_tagged_memory_find(self):
         self.setup_test()
 

lldb/test/API/linux/aarch64/tagged_memory_region/TestAArch64LinuxTaggedMemoryRegion.py

@@ -14,7 +14,7 @@ class AArch64LinuxTaggedMemoryRegionTestCase(TestBase):
 
     # AArch64 Linux always enables the top byte ignore feature
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_mte_regions(self):
         self.build()
         self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)

lldb/test/API/linux/aarch64/tls_registers/TestAArch64LinuxTLSRegisters.py

@@ -96,7 +96,7 @@ class AArch64LinuxTLSRegisters(TestBase):
             self.expect("p {}_was_set".format(register), substrs=["true"])
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_tls_no_sme(self):
         if self.isAArch64SME():
             self.skipTest("SME must not be present.")
@@ -104,7 +104,7 @@ class AArch64LinuxTLSRegisters(TestBase):
         self.check_tls_reg(["tpidr"])
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_tls_sme(self):
         if not self.isAArch64SME():
             self.skipTest("SME must be present.")
@@ -112,7 +112,7 @@ class AArch64LinuxTLSRegisters(TestBase):
         self.check_tls_reg(["tpidr", "tpidr2"])
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_tpidr2_no_sme(self):
         if self.isAArch64SME():
             self.skipTest("SME must not be present.")

lldb/test/API/linux/aarch64/unwind_signal/TestUnwindSignal.py

@@ -12,7 +12,7 @@ class UnwindSignalTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipUnlessArch("aarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_unwind_signal(self):
         """Inferior calls sigill() and handles the resultant SIGILL.
         Stopped at a breakpoint in the handler, check that we can unwind

lldb/test/API/linux/add-symbols/TestTargetSymbolsAddCommand.py

@@ -11,7 +11,7 @@ class TargetSymbolsAddCommand(TestBase):
         self.source = "main.c"
 
     @no_debug_info_test  # Prevent the genaration of the dwarf version of this test
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_target_symbols_add(self):
         """Test that 'target symbols add' can load the symbols
         even if gnu.build-id and gnu_debuglink are not present in the module.

lldb/test/API/linux/arm/tls_register/TestArmLinuxTLSRegister.py

@@ -9,7 +9,7 @@ from lldbsuite.test import lldbutil
 
 
 @skipUnlessArch("arm")
-@skipUnlessPlatform(["linux"])
+@requireLinux
 class ArmLinuxTLSRegister(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 

lldb/test/API/linux/linker-symbols/TestLinkerSymbols.py

@@ -15,7 +15,7 @@ class TestLinkerSymbols(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
     SHARED_BUILD_TESTCASE = False
 
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_linker_symbols(self):
         build_dict = dict(LD_EXTRAS="-Wl,-T," + self.getSourcePath("linker.script"))
         self.build(dictionary=build_dict)

lldb/test/API/linux/loongarch64/simd_registers/TestLoongArch64LinuxSIMDRegisters.py

@@ -78,7 +78,7 @@ class LoongArch64LinuxRegisters(TestBase):
         self.expect("continue", substrs=["exited with status = 0"])
 
     @skipUnlessArch("loongarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_lsx(self):
         """Test read/write of LSX registers."""
         if not self.isLoongArchLSX():
@@ -86,7 +86,7 @@ class LoongArch64LinuxRegisters(TestBase):
         self.simd_registers_impl(Mode.LSX)
 
     @skipUnlessArch("loongarch64")
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_lasx(self):
         """Test read/write of LASX registers."""
         if not self.isLoongArchLASX():

lldb/test/API/linux/mix-dwo-and-regular-objects/TestMixedDwarfBinary.py

@@ -8,7 +8,7 @@ from lldbsuite.test import lldbutil
 class TestMixedDwarfBinary(TestBase):
     @no_debug_info_test  # Prevent the genaration of the dwarf version of this test
     @add_test_categories(["dwo"])
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     def test_mixed_dwarf(self):
         """Test that 'frame variable' works
         for the executable built from two source files compiled

lldb/test/API/linux/sepdebugsymlink/TestTargetSymbolsSepDebugSymlink.py

@@ -7,7 +7,7 @@ from lldbsuite.test import lldbutil
 
 class TestTargetSymbolsSepDebugSymlink(TestBase):
     @no_debug_info_test  # Prevent the genaration of the dwarf version of this test
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @skipIf(hostoslist=["windows"])
     @skipIfRemote  # llvm.org/pr36237
     def test_target_symbols_sepdebug_symlink_case(self):

lldb/test/API/linux/thread/create_during_instruction_step/TestCreateDuringInstructionStep.py

@@ -14,7 +14,7 @@ from lldbsuite.test import lldbutil
 class CreateDuringInstructionStepTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessPlatform(["linux"])
+    @requireLinux
     @expectedFailureAndroid("llvm.org/pr24737", archs=["arm$"])
     @skipIf(oslist=["linux"], archs=["arm$", "aarch64"], bugnumber="llvm.org/pr24737")
     def test_step_inst(self):

lldb/test/API/lldbtest.py

@@ -127,6 +127,15 @@ class LLDBTest(TestFormat):
         expected_failures = parsed_details["expected failures"]
         unexpected_successes = parsed_details["unexpected successes"]
 
+        only_skipped = 0
+        breakdown = re.search(
+            r"^Skip breakdown \(unsupported=(\d+), skipped=(\d+)\)\r?$",
+            err,
+            re.MULTILINE,
+        )
+        if breakdown:
+            only_skipped = int(breakdown.group(2))
+
         non_pass = (
             failures + errors + skipped + expected_failures + unexpected_successes
         )
@@ -142,9 +151,11 @@ class LLDBTest(TestFormat):
             return lit.Test.XPASS, output
         else:
             # Aggregate the tests results with the following precedence:
-            # PASS > XFAIL > UNSUPPORTED
+            # PASS > XFAIL > SKIPPED > UNSUPPORTED
             if passes > 0:
                 return lit.Test.PASS, output
             if expected_failures > 0:
                 return lit.Test.XFAIL, output
+            if only_skipped > 0:
+                return lit.Test.SKIPPED, output
             return lit.Test.UNSUPPORTED, output

lldb/test/API/macosx/add-dsym/TestAddDsymDownload.py

@@ -4,7 +4,7 @@ from lldbsuite.test.lldbtest import *
 from lldbsuite.test import lldbutil
 
 
-@skipUnlessDarwin
+@requireDarwin
 class AddDsymDownload(TestBase):
     SHARED_BUILD_TESTCASE = False
 

lldb/test/API/macosx/add-dsym/TestAddDsymMidExecutionCommand.py

@@ -7,7 +7,7 @@ from lldbsuite.test.lldbtest import *
 from lldbsuite.test import lldbutil
 
 
-@skipUnlessDarwin
+@requireDarwin
 class AddDsymMidExecutionCommandCase(TestBase):
     SHARED_BUILD_TESTCASE = False
 

lldb/test/API/macosx/arm-pointer-metadata-cfa-dwarf-expr/TestArmPointerMetadataCFADwarfExpr.py

@@ -4,7 +4,7 @@ from lldbsuite.test.lldbtest import *
 from lldbsuite.test import lldbutil
 
 
-@skipUnlessDarwin
+@requireDarwin
 @skipIf(archs=no_match(["arm64"]))
 class TestArmPointerMetadataStripping(TestBase):
     def test(self):

lldb/test/API/macosx/bss-only-data-section-sliding/TestBSSOnlyDataSectionSliding.py

@@ -7,7 +7,7 @@ from lldbsuite.test import lldbutil
 
 
 class TestBSSOnlyDataSectionSliding(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     def test_with_python_api(self):
         """Test that we get thread names when interrupting a process."""
         self.build()

lldb/test/API/macosx/corefile-exception-reason/TestCorefileExceptionReason.py

@@ -12,7 +12,7 @@ from lldbsuite.test import lldbutil
 
 class TestCorefileExceptionReason(TestBase):
     @no_debug_info_test
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(archs=no_match(["arm64", "arm64e"]))
     @skipIfRemote
     def test(self):

lldb/test/API/macosx/ctf/TestCTF.py

@@ -21,14 +21,14 @@ class TestCTF(TestBase):
 
     @skipTestIfFn(no_ctf_convert)
     @skipTestIfFn(no_objcopy)
-    @skipUnlessDarwin
+    @requireDarwin
     def test(self):
         self.build()
         self.do_test()
 
     @skipTestIfFn(no_ctf_convert)
     @skipTestIfFn(no_objcopy)
-    @skipUnlessDarwin
+    @requireDarwin
     def test_compressed(self):
         self.build(dictionary={"COMPRESS_CTF": "YES"})
         self.do_test()

lldb/test/API/macosx/debugserver-exit-code/TestDebugServerExitCode.py

@@ -10,7 +10,7 @@ from lldbsuite.test import lldbutil
 
 class TestCase(TestBase):
     @no_debug_info_test
-    @skipUnlessDarwin
+    @requireDarwin
     def test_abort(self):
         self.build()
         target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))

lldb/test/API/macosx/debugserver-multimemread/TestDebugserverMultiMemRead.py

@@ -8,7 +8,7 @@ from lldbsuite.test.lldbtest import *
 from lldbsuite.test import lldbutil
 
 
-@skipUnlessDarwin
+@requireDarwin
 @skipIfOutOfTreeDebugserver
 class TestCase(TestBase):
     def check_invalid_packet(self, packet_str):

lldb/test/API/macosx/delay-init-dependency/TestDelayInitDependency.py

@@ -10,7 +10,7 @@ from lldbsuite.test import lldbutil
 class TestDelayInitDependencies(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(macos_version=["<", "15.0"])
     @skipIfRemote
     def test_delay_init_dependency(self):

lldb/test/API/macosx/deny-attach/TestDenyAttach.py

@@ -8,7 +8,7 @@ from lldbsuite.test import lldbutil
 class DenyAttachTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded  # PT_DENY_ATTACH attach behavior differs on ios/tvos/etc
     @skipIfAsan  # Attach tests time out inconsistently under asan.
     def test_attach_to_deny_attach_process(self):

lldb/test/API/macosx/dsym_codesign/TestdSYMCodesign.py

@@ -28,7 +28,7 @@ def has_lldb_codesign():
         return False
 
 
-@skipUnlessDarwin
+@requireDarwin
 class TestdSYMCodesign(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
     SHARED_BUILD_TESTCASE = False

lldb/test/API/macosx/dsym_modules/TestdSYMModuleInit.py

@@ -11,7 +11,7 @@ from lldbsuite.test.lldbtest import *
 from lldbsuite.test.decorators import *
 
 
-@skipUnlessDarwin
+@requireDarwin
 class TestdSYMModuleInit(TestBase):
     SHARED_BUILD_TESTCASE = False
 

lldb/test/API/macosx/dyld-trie-symbols/TestDyldTrieSymbols.py

@@ -12,7 +12,7 @@ class DyldTrieSymbolsTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_dyld_trie_symbols(self):
         """Test that we make create symbol table entries from the dyld trie data structure."""
         self.build()

lldb/test/API/macosx/early-process-launch/TestEarlyProcessLaunch.py

@@ -10,7 +10,7 @@ from lldbsuite.test import lldbutil
 class TestEarlyProcessLaunch(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfAsan  # rdar://103359354
     # until this feature is included in the system
     # debugserver.

lldb/test/API/macosx/expedited-stack-memory/TestExpeditedStackMemory.py

@@ -34,18 +34,18 @@ from lldbsuite.test.gdbclientutils import (
 class TestExpeditedStackMemory(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_no_packets_during_backtrace(self):
         """With the memory cache on, the backtrace sends no packets at all."""
         self.check_packets_during_backtrace(disable_memory_cache=False)
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_memory_reads_during_backtrace_without_cache(self):
         """With the memory cache off, the backtrace reads the backchain from the
         stub, producing memory-read packets."""
         self.check_packets_during_backtrace(disable_memory_cache=True)
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_memory_reads_when_examining_frame0_locals(self):
         """Model an IDE stop: walk the whole stack (a backtrace / debug
         navigator) but examine the locals of only the selected frame 0.
@@ -54,7 +54,7 @@ class TestExpeditedStackMemory(TestBase):
         heap memory."""
         self.check_memory_reads_when_examining_locals(examine_all_frames=False)
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_memory_reads_when_examining_all_frames_locals(self):
         """Model "view all frames": walk the whole stack and examine every
         frame's locals.  This reads the same variety of memory across several

lldb/test/API/macosx/expedited-thread-pcs/TestExpeditedThreadPCs.py

@@ -12,7 +12,7 @@ file_index = 0
 class TestExpeditedThreadPCs(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_expedited_thread_pcs(self):
         TestBase.setUp(self)
 

lldb/test/API/macosx/extended-backtrace-api/TestExtendedBacktraceAPI.py

@@ -15,7 +15,7 @@ class TestExtendedBacktraceAPI(TestBase):
         TestBase.setUp(self)
         self.main_source = "main.m"
 
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["objc", "pyapi"])
     def test_extended_backtrace_thread_api(self):
         """Test GetExtendedBacktraceThread with queue debugging."""

lldb/test/API/macosx/find-app-in-bundle/TestFindAppInBundle.py

@@ -9,7 +9,7 @@ import lldbsuite.test.lldbplatformutil as lldbplatformutil
 from lldbsuite.test.lldbtest import *
 
 
-@decorators.skipUnlessDarwin
+@decorators.requireDarwin
 class FindAppInMacOSAppBundle(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 

lldb/test/API/macosx/find-dsym/bundle-with-dot-in-filename/TestBundleWithDotInFilename.py

@@ -26,7 +26,7 @@ class BundleWithDotInFilenameTestCase(TestBase):
         TestBase.tearDown(self)
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     # This test is explicitly a dSYM test, it doesn't need to run for any other config.
     @skipIf(debug_info=no_match(["dsym"]))
     def test_attach_and_check_dsyms(self):

lldb/test/API/macosx/find-dsym/deep-bundle/TestDeepBundle.py

@@ -25,7 +25,7 @@ class DeepBundleTestCase(TestBase):
         TestBase.tearDown(self)
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     # This test is explicitly a dSYM test, it doesn't need to run for any other config.
     @skipIf(debug_info=no_match(["dsym"]))
     def test_attach_and_check_dsyms(self):

lldb/test/API/macosx/format/TestFunctionNameWithoutArgs.py

@@ -4,7 +4,7 @@ from lldbsuite.test.lldbtest import *
 
 
 class TestFunctionNameWithoutArgs(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     @no_debug_info_test
     def test_function_name_without_args(self):
         self.build()

lldb/test/API/macosx/function-starts/TestFunctionStarts.py

@@ -16,7 +16,7 @@ class FunctionStartsTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(compiler="clang", compiler_version=["<", "13.0"])
     def test_function_starts_binary(self):
         """Test that we make synthetic symbols when we have the binary."""
@@ -24,7 +24,7 @@ class FunctionStartsTestCase(TestBase):
         self.do_function_starts(False)
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(compiler="clang", compiler_version=["<", "13.0"])
     def test_function_starts_no_binary(self):
         """Test that we make synthetic symbols when we don't have the binary"""

lldb/test/API/macosx/ignore_exceptions/TestIgnoredExceptions.py

@@ -12,7 +12,7 @@ from lldbsuite.test.lldbtest import *
 class TestDarwinSignalHandlers(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_ignored_thread(self):
         """It isn't possible to convert an EXC_BAD_ACCESS to a signal when
         running under the debugger, which makes debugging SIGBUS handlers

lldb/test/API/macosx/indirect_symbol/TestIndirectSymbols.py

@@ -14,7 +14,7 @@ class TestIndirectFunctions(TestBase):
         # Find the line numbers that we will step to in main:
         self.main_source = "main.c"
 
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     @skipIf(bugnumber="rdar://120796553")
     def test_with_python_api(self):

lldb/test/API/macosx/lc-note/additional-registers/TestMetadataRegisters.py

@@ -13,7 +13,7 @@ from lldbsuite.test import lldbutil
 class TestMetadataRegisters(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote
     def test_add_registers_via_metadata(self):
         self.build()

lldb/test/API/macosx/lc-note/addrable-bits/TestAddrableBitsCorefile.py

@@ -20,7 +20,7 @@ class TestAddrableBitsCorefile(TestBase):
         self.corefile = self.getBuildArtifact("corefile")
 
     @skipIf(archs=no_match(["arm64e"]))
-    @skipUnlessDarwin
+    @requireDarwin
     def test_lc_note_addrable_bits(self):
         self.initial_setup()
 

lldb/test/API/macosx/lc-note/firmware-corefile/TestFirmwareCorefiles.py

@@ -20,7 +20,7 @@ class TestFirmwareCorefiles(TestBase):
     )
     @skipIf(archs=no_match(["x86_64", "arm64", "arm64e", "aarch64"]))
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_lc_note_version_string(self):
         self.build()
         aout_exe_basename = "a.out"
@@ -120,7 +120,7 @@ class TestFirmwareCorefiles(TestBase):
     )
     @skipIf(archs=no_match(["x86_64", "arm64", "arm64e", "aarch64"]))
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_lc_note_main_bin_spec(self):
         self.build()
         aout_exe_basename = "a.out"
@@ -233,7 +233,7 @@ class TestFirmwareCorefiles(TestBase):
     )
     @skipIf(archs=no_match(["x86_64", "arm64", "arm64e", "aarch64"]))
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_lc_note_main_bin_spec_os_plugin(self):
         self.build()
         aout_exe = self.getBuildArtifact("a.out")

lldb/test/API/macosx/lc-note/kern-ver-str/TestKernVerStrLCNOTE.py

@@ -17,7 +17,7 @@ class TestKernVerStrLCNOTE(TestBase):
         bugnumber="This test is looking explicitly for a dSYM",
     )
     @skipIf(archs=no_match(["x86_64"]))
-    @skipUnlessDarwin
+    @requireDarwin
     def test_lc_note(self):
         self.build()
         self.test_exe = self.getBuildArtifact("a.out")

lldb/test/API/macosx/lc-note/multiple-binary-corefile/TestMultipleBinaryCorefile.py

@@ -82,7 +82,7 @@ class TestMultipleBinaryCorefile(TestBase):
 
     @skipIf(archs=no_match(["x86_64", "arm64", "arm64e", "aarch64"]))
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_corefile_binaries_dsymforuuid(self):
         self.initial_setup()
 
@@ -198,7 +198,7 @@ class TestMultipleBinaryCorefile(TestBase):
 
     @skipIf(archs=no_match(["x86_64", "arm64", "arm64e", "aarch64"]))
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_corefile_binaries_preloaded(self):
         self.initial_setup()
 

lldb/test/API/macosx/macCatalyst/TestMacCatalyst.py

@@ -10,7 +10,7 @@ class TestMacCatalyst(TestBase):
     SHARED_BUILD_TESTCASE = False
 
     @skipIf(macos_version=["<", "10.15"])
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     def test_macabi(self):
         """Test the x86_64-apple-ios-macabi target linked against a macos dylib"""

lldb/test/API/macosx/macCatalystAppMacOSFramework/TestMacCatalystAppWithMacOSFramework.py

@@ -7,7 +7,7 @@ import os
 
 class TestMacCatalystAppWithMacOSFramework(TestBase):
     @skipIf(macos_version=["<", "10.15"])
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     # There is a Clang driver change missing on llvm.org.
     @expectedFailureAll(bugnumber="rdar://problem/54986190>")

lldb/test/API/macosx/mte/TestDarwinMTE.py

@@ -11,7 +11,7 @@ import lldbsuite.test.cpu_feature as cpu_feature
 exe_name = "uaf"  # Must match Makefile
 
 
-@skipIfWasm  # memory tagging is a Darwin AArch64 feature
+@requireNotWasm  # memory tagging is a Darwin AArch64 feature
 class TestDarwinMTE(TestBase):
     SHARED_BUILD_TESTCASE = False
     NO_DEBUG_INFO_TESTCASE = True

lldb/test/API/macosx/no-nlist-memory-module/TestNoNlistsDylib.py

@@ -15,7 +15,7 @@ class NoNlistsTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     def test_no_nlist_symbols(self):
         self.build()
 

lldb/test/API/macosx/nslog/TestDarwinNSLogOutput.py

@@ -120,7 +120,7 @@ class DarwinNSLogOutputTestCase(TestBase):
 
     @skipIfAsan # avoid dealing with pexpect timeout flakyness on bots
     @skipIf(oslist=["linux"], archs=["arm$", "aarch64"])
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote  # this test is currently written using lldb commands & assumes running on local system
     def test_nslog_output_is_displayed(self):
         """Test that NSLog() output shows up in the command-line debugger."""
@@ -136,7 +136,7 @@ class DarwinNSLogOutputTestCase(TestBase):
 
     @skipIfAsan # avoid dealing with pexpect timeout flakyness on bots
     @skipIf(oslist=["linux"], archs=["arm$", "aarch64"])
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote  # this test is currently written using lldb commands & assumes running on local system
     def test_nslog_output_is_suppressed_with_env_var(self):
         """Test that NSLog() output does not show up with the ignore env var."""

lldb/test/API/macosx/objc_exception_recognizer/TestObjCRecognizer.py

@@ -11,14 +11,14 @@ from lldbsuite.test.lldbtest import *
 class TestObjCRecognizer(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_exception_recognizer_sub_class(self):
         """There can be many tests in a test case - describe this test here."""
         self.build()
         self.main_source_file = lldb.SBFileSpec("main.m")
         self.objc_recognizer_test(True)
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_exception_recognizer_plain(self):
         """There can be many tests in a test case - describe this test here."""
         self.build()

lldb/test/API/macosx/order/TestOrderFile.py

@@ -11,7 +11,7 @@ from lldbsuite.test import lldbutil
 
 
 class OrderFileTestCase(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     def test(self):
         """Test debug symbols follow the correct order by the order file."""
         self.build()

lldb/test/API/macosx/posix_spawn/TestLaunchProcessPosixSpawn.py

@@ -49,7 +49,7 @@ class TestLaunchProcessPosixSpawn(TestBase):
         self.assertState(process.GetState(), lldb.eStateExited)
         self.assertIn("slice: {}".format(arch), process.GetSTDOUT(1000))
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     @skipIfLLVMTargetMissing("AArch64")
     @skipIfLLVMTargetMissing("X86")
@@ -60,7 +60,7 @@ class TestLaunchProcessPosixSpawn(TestBase):
         self.run_arch(exe, "x86_64")
         self.run_arch(exe, "x86_64h")
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(bugnumber="rdar://170040996")
     @skipIfDarwinEmbedded
     @skipIfLLVMTargetMissing("AArch64")

lldb/test/API/macosx/profile_vrs_detach/TestDetachVrsProfile.py

@@ -18,7 +18,7 @@ import signal
 class TestDetachVrsProfile(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote
     def test_profile_and_detach(self):
         """There can be many tests in a test case - describe this test here."""

lldb/test/API/macosx/queues/TestQueues.py

@@ -9,20 +9,20 @@ from lldbsuite.test import lldbutil
 
 
 class TestQueues(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     def test_with_python_api_queues(self):
         """Test queues inspection SB APIs."""
         self.build()
         self.queues()
 
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     def test_queue_specific_breakpoints(self):
         self.build()
         self.queue_specific_breakpoints()
 
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     def test_with_python_api_queues_with_backtrace(self):
         """Test queues inspection SB APIs."""

lldb/test/API/macosx/safe-to-func-call/TestSafeFuncCalls.py

@@ -8,7 +8,7 @@ from lldbsuite.test import lldbutil
 
 
 class TestSafeFuncCalls(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     def test_with_python_api(self):
         """Test function call thread safety."""

lldb/test/API/macosx/save_crashlog/TestSaveCrashlog.py

@@ -16,7 +16,7 @@ class TestSaveCrashlog(TestBase):
     # each debug info format.
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_save_crashlog(self):
         """There can be many tests in a test case - describe this test here."""
         self.build()

lldb/test/API/macosx/shared-cache-host-memory/TestSharedCacheHostMemory.py

@@ -7,7 +7,7 @@ from lldbsuite.test import lldbutil
 class SharedCacheHostMemoryTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote
     def test_host_lldb_memory(self):
         """Stop in a shared cache binary loaded from lldb's own memory and

lldb/test/API/macosx/shared-cache-vm-range/TestSharedCacheVMRange.py

@@ -14,7 +14,7 @@ class SharedCacheVMRangeTestCase(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfRemote
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfOutOfTreeDebugserver  # debugserver returns shared_cache_size
     def test_shared_cache_vm_range(self):
         """Test that the shared cache VM range contains a known libc function"""

lldb/test/API/macosx/simulator/TestSimulatorPlatform.py

@@ -99,7 +99,7 @@ class TestSimulatorPlatformLaunching(TestBase):
             )
 
     @skipIfAsan
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     @apple_simulator_test("iphone")
     @skipIf(archs=["x86_64"])
@@ -114,7 +114,7 @@ class TestSimulatorPlatformLaunching(TestBase):
         )
 
     @skipIfAsan
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     @apple_simulator_test("appletv")
     @skipIf(archs=["x86_64"])

lldb/test/API/macosx/skinny-corefile/TestSkinnyCorefile.py

@@ -18,7 +18,7 @@ class TestSkinnyCorefile(TestBase):
         debug_info=no_match(["dsym"]),
         bugnumber="This test is looking explicitly for a dSYM",
     )
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote
     def test_lc_note(self):
         self.build()

lldb/test/API/macosx/sme-registers/TestSMERegistersDarwin.py

@@ -10,7 +10,7 @@ class TestSMERegistersDarwin(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
     mydir = TestBase.compute_mydir(__file__)
 
-    @skipUnlessDarwin
+    @requireDarwin
     @skipUnlessFeature(cpu_feature.AArch64.SME)
     @skipUnlessFeature(cpu_feature.AArch64.SME2)
     # thread_set_state/thread_get_state only avail in macOS 15.4+

lldb/test/API/macosx/stack-corefile/TestStackCorefile.py

@@ -12,7 +12,7 @@ from lldbsuite.test import lldbutil
 
 class TestStackCorefile(TestBase):
     @no_debug_info_test
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfRemote
     def test(self):
         corefile = self.getBuildArtifact("process.core")

lldb/test/API/macosx/stop-reason-exception/TestMachExceptionData.py

@@ -12,7 +12,7 @@ from lldbsuite.test.decorators import *
 class TestMachExceptionData(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_exc_bad_access(self):
         """Test that we get type 1, code 1 and the right address for
         a EXC_BAD_ACCESS mach exception."""

lldb/test/API/macosx/tbi-honored/TestTBIHonored.py

@@ -27,7 +27,7 @@ class TestTBIHonored(TestBase):
     # This test is valid on AArch64 systems with TBI mode enabled,
     # and an address mask that clears the top byte before reading
     # from memory.
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIf(archs=no_match(["arm64", "arm64e"]))
     @skipIfRemote
     def test(self):

lldb/test/API/macosx/thread-names/TestInterruptThreadNames.py

@@ -11,7 +11,7 @@ from lldbsuite.test import lldbutil
 class TestInterruptThreadNames(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     @add_test_categories(["pyapi"])
     def test_with_python_api(self):
         """Test that we get thread names when interrupting a process."""

lldb/test/API/macosx/thread_start_bps/TestBreakpointsThreadInit.py

@@ -8,7 +8,7 @@ from lldbsuite.test import lldbutil
 
 
 class TestInterruptThreadNames(TestBase):
-    @skipUnlessDarwin
+    @requireDarwin
     def test_internal_bps_resolved(self):
         self.build()
 
@@ -36,7 +36,7 @@ class TestInterruptThreadNames(TestBase):
             num_resolved += bp.GetNumResolvedLocations()
         self.assertGreater(num_resolved, 0)
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_internal_bps_deleted_on_relaunch(self):
         self.build()
 

lldb/test/API/macosx/thread_suspend/TestInternalThreadSuspension.py

@@ -12,7 +12,7 @@ from lldbsuite.test.lldbtest import *
 class TestSuspendedThreadHandling(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipUnlessDarwin
+    @requireDarwin
     def test_suspended_threads(self):
         """Test that debugserver doesn't disturb the suspend count of a thread
         that has been suspended from within a program, when navigating breakpoints

lldb/test/API/macosx/universal/TestUniversal.py

@@ -23,7 +23,7 @@ class UniversalTestCase(TestBase):
         self.line = line_number("main.c", "// Set break point at this line.")
 
     @add_test_categories(["pyapi"])
-    @skipUnlessDarwin
+    @requireDarwin
     @unittest.skipUnless(
         hasattr(os, "uname") and os.uname()[4] in ["x86_64"], "requires x86_64"
     )
@@ -49,7 +49,7 @@ class UniversalTestCase(TestBase):
         process = target.LaunchSimple(None, None, self.get_process_working_directory())
         self.assertTrue(process, PROCESS_IS_VALID)
 
-    @skipUnlessDarwin
+    @requireDarwin
     @unittest.skipUnless(
         hasattr(os, "uname") and os.uname()[4] in ["x86_64"], "requires x86_64"
     )
@@ -112,7 +112,7 @@ class UniversalTestCase(TestBase):
         self.expect("image list -A -b", substrs=["x86_64h testit"])
         self.runCmd("continue")
 
-    @skipUnlessDarwin
+    @requireDarwin
     @unittest.skipUnless(
         hasattr(os, "uname") and os.uname()[4] in ["x86_64"], "requires x86_64"
     )

lldb/test/API/macosx/universal64/TestUniversal64.py

@@ -20,7 +20,7 @@ class Universal64TestCase(TestBase):
     # The Makefile manually invokes clang.
     @skipIfLLVMTargetMissing("X86")
     @skipIfAsan
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     def test_universal64_executable(self):
         """Test fat64 universal executable"""
@@ -30,7 +30,7 @@ class Universal64TestCase(TestBase):
     # The Makefile manually invokes clang.
     @skipIfLLVMTargetMissing("X86")
     @skipIfAsan
-    @skipUnlessDarwin
+    @requireDarwin
     @skipIfDarwinEmbedded
     def test_universal64_dsym(self):
         """Test fat64 universal dSYM"""

lldb/test/API/macosx/unregistered-macho/TestUnregisteredMacho.py

@@ -14,7 +14,7 @@ class TestUnregisteredMacho(TestBase):
     # newer debugserver required for jGetLoadedDynamicLibrariesInfos
     # to support this
     @no_debug_info_test
-    @skipUnlessDarwin
+    @requireDarwin
     def test(self):
         self.build()
         target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(

lldb/test/API/windows/conpty/TestConPTY.py

@@ -61,7 +61,7 @@ class ConPTYTestCase(TestBase):
 
         return process.GetSTDOUT(1 << 20)
 
-    @skipUnlessWindows
+    @requireWindows
     @skipUnlessWindowsConPTY2022
     @skipIf(oslist=["windows"], archs=["aarch64"], bugnumber="#194069")
     def test_stdout_delivery(self):
@@ -72,7 +72,7 @@ class ConPTYTestCase(TestBase):
         output = self._strip_output(output)
         self.assertIn("Hello from ConPTY\r\n", output)
 
-    @skipUnlessWindows
+    @requireWindows
     @skipUnlessWindowsConPTY2022
     @skipIf(oslist=["windows"], archs=["aarch64"], bugnumber="#194069")
     def test_large_output(self):
@@ -90,7 +90,7 @@ class ConPTYTestCase(TestBase):
         for i, line in enumerate(output_lines):
             self.assertEqual("line %04d" % i, line)
 
-    @skipUnlessWindows
+    @requireWindows
     @skipUnlessWindowsConPTY
     @skipIf(oslist=["windows"], archs=["aarch64"], bugnumber="#194069")
     def test_basic_output_without_vt_check(self):
@@ -107,7 +107,7 @@ class ConPTYTestCase(TestBase):
         stripped = re.sub(r"\x1b\[[0-9;?]*[A-Za-z]", "", output)
         self.assertIn("Hello from ConPTY", stripped)
 
-    @skipUnlessWindows
+    @requireWindows
     @skipUnlessWindowsConPTY2022
     @skipIf(oslist=["windows"], archs=["aarch64"], bugnumber="#194069")
     def test_no_screen_clear_on_init(self):