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[clang][PAC] Disallow -pedantic-errors in conjunction with pointer au… #153503

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58 changes: 38 additions & 20 deletions clang/lib/Frontend/CompilerInvocation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3602,30 +3602,43 @@ static void GeneratePointerAuthArgs(const LangOptions &Opts,

static void ParsePointerAuthArgs(LangOptions &Opts, ArgList &Args,
DiagnosticsEngine &Diags) {
Opts.PointerAuthIntrinsics = Args.hasArg(OPT_fptrauth_intrinsics);
Opts.PointerAuthCalls = Args.hasArg(OPT_fptrauth_calls);
Opts.PointerAuthReturns = Args.hasArg(OPT_fptrauth_returns);
Opts.PointerAuthIndirectGotos = Args.hasArg(OPT_fptrauth_indirect_gotos);
Opts.PointerAuthAuthTraps = Args.hasArg(OPT_fptrauth_auth_traps);
Opts.PointerAuthVTPtrAddressDiscrimination =
Args.hasArg(OPT_fptrauth_vtable_pointer_address_discrimination);
Opts.PointerAuthVTPtrTypeDiscrimination =
Args.hasArg(OPT_fptrauth_vtable_pointer_type_discrimination);
Opts.PointerAuthTypeInfoVTPtrDiscrimination =
Args.hasArg(OPT_fptrauth_type_info_vtable_pointer_discrimination);
Opts.PointerAuthFunctionTypeDiscrimination =
Args.hasArg(OPT_fptrauth_function_pointer_type_discrimination);
Opts.PointerAuthInitFini = Args.hasArg(OPT_fptrauth_init_fini);
const Arg *PedanticErrors = Args.getLastArgNoClaim(OPT_pedantic_errors);
auto GetAndCheckPointerAuthArg = [&](driver::options::ID Option) {
Arg *OptionArg = Args.getLastArg(Option);
if (OptionArg && PedanticErrors) {
Diags.Report(diag::err_drv_incompatible_options)
<< OptionArg->getSpelling() << PedanticErrors->getSpelling();
}
return OptionArg != nullptr;
};
Opts.PointerAuthIntrinsics =
GetAndCheckPointerAuthArg(OPT_fptrauth_intrinsics);
Opts.PointerAuthCalls = GetAndCheckPointerAuthArg(OPT_fptrauth_calls);
Opts.PointerAuthReturns = GetAndCheckPointerAuthArg(OPT_fptrauth_returns);
Opts.PointerAuthIndirectGotos =
GetAndCheckPointerAuthArg(OPT_fptrauth_indirect_gotos);
Opts.PointerAuthAuthTraps =
GetAndCheckPointerAuthArg(OPT_fptrauth_auth_traps);
Opts.PointerAuthVTPtrAddressDiscrimination = GetAndCheckPointerAuthArg(
OPT_fptrauth_vtable_pointer_address_discrimination);
Opts.PointerAuthVTPtrTypeDiscrimination = GetAndCheckPointerAuthArg(
OPT_fptrauth_vtable_pointer_type_discrimination);
Opts.PointerAuthTypeInfoVTPtrDiscrimination = GetAndCheckPointerAuthArg(
OPT_fptrauth_type_info_vtable_pointer_discrimination);
Opts.PointerAuthFunctionTypeDiscrimination = GetAndCheckPointerAuthArg(
OPT_fptrauth_function_pointer_type_discrimination);
Opts.PointerAuthInitFini = GetAndCheckPointerAuthArg(OPT_fptrauth_init_fini);
Opts.PointerAuthInitFiniAddressDiscrimination =
Args.hasArg(OPT_fptrauth_init_fini_address_discrimination);
Opts.PointerAuthELFGOT = Args.hasArg(OPT_fptrauth_elf_got);
GetAndCheckPointerAuthArg(OPT_fptrauth_init_fini_address_discrimination);
Opts.PointerAuthELFGOT = GetAndCheckPointerAuthArg(OPT_fptrauth_elf_got);
Opts.AArch64JumpTableHardening =
Args.hasArg(OPT_faarch64_jump_table_hardening);
GetAndCheckPointerAuthArg(OPT_faarch64_jump_table_hardening);

Opts.PointerAuthObjcIsa = Args.hasArg(OPT_fptrauth_objc_isa);
Opts.PointerAuthObjcClassROPointers = Args.hasArg(OPT_fptrauth_objc_class_ro);
Opts.PointerAuthObjcIsa = GetAndCheckPointerAuthArg(OPT_fptrauth_objc_isa);
Opts.PointerAuthObjcClassROPointers =
GetAndCheckPointerAuthArg(OPT_fptrauth_objc_class_ro);
Opts.PointerAuthObjcInterfaceSel =
Args.hasArg(OPT_fptrauth_objc_interface_sel);
GetAndCheckPointerAuthArg(OPT_fptrauth_objc_interface_sel);

if (Opts.PointerAuthObjcInterfaceSel)
Opts.PointerAuthObjcInterfaceSelKey =
Expand Down Expand Up @@ -5021,6 +5034,11 @@ bool CompilerInvocation::CreateFromArgsImpl(
InputKind DashX = Res.getFrontendOpts().DashX;
ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
llvm::Triple T(Res.getTargetOpts().Triple);
if (const Arg *PedanticErrors = Args.getLastArgNoClaim(OPT_pedantic_errors);
PedanticErrors && T.isArm64e()) {
Diags.Report(diag::err_drv_unsupported_opt_for_target)
<< PedanticErrors->getSpelling() << T.str();
}
ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args, Diags,
Res.getFileSystemOpts().WorkingDir);
if (Res.getFrontendOpts().GenReducedBMI ||
Expand Down
33 changes: 33 additions & 0 deletions clang/test/Driver/aarch64-ptrauth-pedantic-errors.c
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
// REQUIRES: aarch64-registered-target

// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-intrinsics %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-calls %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-returns %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-indirect-gotos %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-auth-traps %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-vtable-pointer-address-discrimination %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-vtable-pointer-type-discrimination %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-function-pointer-type-discrimination %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-init-fini %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-init-fini-address-discrimination %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -faarch64-jump-table-hardening %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-objc-isa %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-objc-class-ro %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=aarch64 -fptrauth-objc-interface-sel %s -c 2>&1 | FileCheck %s
// RUN: not %clang -pedantic-errors --target=arm64e %s -c 2>&1 | FileCheck %s --check-prefix ARM64E_TRIPLE
// RUN: not %clang -pedantic-errors --target=arm64e-apple-macosx10.0 %s -c 2>&1 | FileCheck %s --check-prefix ARM64E_MACOS_TRIPLE
// RUN: not %clang -pedantic-errors -arch arm64e %s -c 2>&1 | FileCheck %s --check-prefix ARM64E_ARCH

// FIXME: Cannot work out what the correct invocation to permit -fptrauth-elf-got is
// -- not %clang -pedantic-errors --target=aarch64 -fptrauth-elf-got %s -c 2>&1 | FileCheck %s

int i;

// CHECK: error: the combination of '{{.*}}' and '-pedantic-errors' is incompatible
// ARM64E_TRIPLE: error: unsupported option '-pedantic-errors' for target 'arm64e'
// ARM64E_MACOS_TRIPLE: error: unsupported option '-pedantic-errors' for target 'arm64e-apple-macosx10.0.0'

// We have a trailing 'arm64e with no closing ' as the full triple is inferred from the host
// which we don't care about, and don't want to specify as we're wanting to ensure that *just*
// using '-arch arm64e' is sufficient
// ARM64E_ARCH: error: unsupported option '-pedantic-errors' for target 'arm64e
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