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Kernel: Enable building the kernel with -flto

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GCC with -flto is more aggressive when it comes to inlining and
discarding functions which is why we must mark some of the functions
as NEVER_INLINE (because they contain asm labels which would be
duplicated in the object files if the compiler decides to inline
the function elsewhere) and __attribute__((used)) for others so
that GCC doesn't discard them.
This commit is contained in:
Gunnar Beutner 2021-04-29 14:54:15 +02:00 • committed by Andreas Kling
parent b861259098
commit 55ae52fdf8
9 changed files with 57 additions and 57 deletions
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40
Kernel/UBSanitizer.cpp
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@ -28,49 +28,49 @@ static void print_location(const SourceLocation& location)
PANIC("UB is configured to be deadly.");
}
void __ubsan_handle_load_invalid_value(const InvalidValueData&, ValueHandle);
void __ubsan_handle_load_invalid_value(const InvalidValueData&, ValueHandle) __attribute__((used));
void __ubsan_handle_load_invalid_value(const InvalidValueData& data, ValueHandle)
{
dbgln("KUBSAN: load-invalid-value: {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_nonnull_arg(const NonnullArgData&);
void __ubsan_handle_nonnull_arg(const NonnullArgData&) __attribute__((used));
void __ubsan_handle_nonnull_arg(const NonnullArgData& data)
{
dbgln("KUBSAN: null pointer passed as argument {}, which is declared to never be null", data.argument_index);
print_location(data.location);
}
void __ubsan_handle_nullability_arg(const NonnullArgData&);
void __ubsan_handle_nullability_arg(const NonnullArgData&) __attribute__((used));
void __ubsan_handle_nullability_arg(const NonnullArgData& data)
{
dbgln("KUBSAN: null pointer passed as argument {}, which is declared to never be null", data.argument_index);
print_location(data.location);
}
void __ubsan_handle_nonnull_return_v1(const NonnullReturnData&, const SourceLocation&);
void __ubsan_handle_nonnull_return_v1(const NonnullReturnData&, const SourceLocation&) __attribute__((used));
void __ubsan_handle_nonnull_return_v1(const NonnullReturnData&, const SourceLocation& location)
{
dbgln("KUBSAN: null pointer return from function declared to never return null");
print_location(location);
}
void __ubsan_handle_nullability_return_v1(const NonnullReturnData& data, const SourceLocation& location);
void __ubsan_handle_nullability_return_v1(const NonnullReturnData& data, const SourceLocation& location) __attribute__((used));
void __ubsan_handle_nullability_return_v1(const NonnullReturnData&, const SourceLocation& location)
{
dbgln("KUBSAN: null pointer return from function declared to never return null");
print_location(location);
}
void __ubsan_handle_vla_bound_not_positive(const VLABoundData&, ValueHandle);
void __ubsan_handle_vla_bound_not_positive(const VLABoundData&, ValueHandle) __attribute__((used));
void __ubsan_handle_vla_bound_not_positive(const VLABoundData& data, ValueHandle)
{
dbgln("KUBSAN: VLA bound not positive {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_add_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs);
void __ubsan_handle_add_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs) __attribute__((used));
void __ubsan_handle_add_overflow(const OverflowData& data, ValueHandle, ValueHandle)
{
dbgln("KUBSAN: addition overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
@ -78,7 +78,7 @@ void __ubsan_handle_add_overflow(const OverflowData& data, ValueHandle, ValueHan
print_location(data.location);
}
void __ubsan_handle_sub_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs);
void __ubsan_handle_sub_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs) __attribute__((used));
void __ubsan_handle_sub_overflow(const OverflowData& data, ValueHandle, ValueHandle)
{
dbgln("KUBSAN: subtraction overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
@ -86,7 +86,7 @@ void __ubsan_handle_sub_overflow(const OverflowData& data, ValueHandle, ValueHan
print_location(data.location);
}
void __ubsan_handle_negate_overflow(const OverflowData&, ValueHandle);
void __ubsan_handle_negate_overflow(const OverflowData&, ValueHandle) __attribute__((used));
void __ubsan_handle_negate_overflow(const OverflowData& data, ValueHandle)
{
dbgln("KUBSAN: negation overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
@ -94,35 +94,35 @@ void __ubsan_handle_negate_overflow(const OverflowData& data, ValueHandle)
print_location(data.location);
}
void __ubsan_handle_mul_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs);
void __ubsan_handle_mul_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs) __attribute__((used));
void __ubsan_handle_mul_overflow(const OverflowData& data, ValueHandle, ValueHandle)
{
dbgln("KUBSAN: multiplication overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_shift_out_of_bounds(const ShiftOutOfBoundsData&, ValueHandle lhs, ValueHandle rhs);
void __ubsan_handle_shift_out_of_bounds(const ShiftOutOfBoundsData&, ValueHandle lhs, ValueHandle rhs) __attribute__((used));
void __ubsan_handle_shift_out_of_bounds(const ShiftOutOfBoundsData& data, ValueHandle, ValueHandle)
{
dbgln("KUBSAN: shift out of bounds, {} ({}-bit) shifted by {} ({}-bit)", data.lhs_type.name(), data.lhs_type.bit_width(), data.rhs_type.name(), data.rhs_type.bit_width());
print_location(data.location);
}
void __ubsan_handle_divrem_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs);
void __ubsan_handle_divrem_overflow(const OverflowData&, ValueHandle lhs, ValueHandle rhs) __attribute__((used));
void __ubsan_handle_divrem_overflow(const OverflowData& data, ValueHandle, ValueHandle)
{
dbgln("KUBSAN: divrem overflow, {} ({}-bit)", data.type.name(), data.type.bit_width());
print_location(data.location);
}
void __ubsan_handle_out_of_bounds(const OutOfBoundsData&, ValueHandle);
void __ubsan_handle_out_of_bounds(const OutOfBoundsData&, ValueHandle) __attribute__((used));
void __ubsan_handle_out_of_bounds(const OutOfBoundsData& data, ValueHandle)
{
dbgln("KUBSAN: out of bounds access into array of {} ({}-bit), index type {} ({}-bit)", data.array_type.name(), data.array_type.bit_width(), data.index_type.name(), data.index_type.bit_width());
print_location(data.location);
}
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData&, ValueHandle);
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData&, ValueHandle) __attribute__((used));
void __ubsan_handle_type_mismatch_v1(const TypeMismatchData& data, ValueHandle ptr)
{
static const char* kinds[] = {
@ -155,7 +155,7 @@ void __ubsan_handle_type_mismatch_v1(const TypeMismatchData& data, ValueHandle p
}
// FIXME: Causes a triple fault on boot
void __ubsan_handle_alignment_assumption(const AlignmentAssumptionData&, ValueHandle, ValueHandle, ValueHandle);
void __ubsan_handle_alignment_assumption(const AlignmentAssumptionData&, ValueHandle, ValueHandle, ValueHandle) __attribute__((used));
void __ubsan_handle_alignment_assumption(const AlignmentAssumptionData& data, ValueHandle pointer, ValueHandle alignment, ValueHandle offset)
{
if (offset) {
@ -172,21 +172,21 @@ void __ubsan_handle_alignment_assumption(const AlignmentAssumptionData& data, Va
print_location(data.location);
}
void __ubsan_handle_builtin_unreachable(const UnreachableData&);
void __ubsan_handle_builtin_unreachable(const UnreachableData&) __attribute__((used));
void __ubsan_handle_builtin_unreachable(const UnreachableData& data)
{
dbgln("KUBSAN: execution reached an unreachable program point");
print_location(data.location);
}
void __ubsan_handle_missing_return(const UnreachableData&);
void __ubsan_handle_missing_return(const UnreachableData&) __attribute__((used));
void __ubsan_handle_missing_return(const UnreachableData& data)
{
dbgln("KUBSAN: execution reached the end of a value-returning function without returning a value");
print_location(data.location);
}
void __ubsan_handle_implicit_conversion(const ImplicitConversionData&, ValueHandle, ValueHandle);
void __ubsan_handle_implicit_conversion(const ImplicitConversionData&, ValueHandle, ValueHandle) __attribute__((used));
void __ubsan_handle_implicit_conversion(const ImplicitConversionData& data, ValueHandle, ValueHandle)
{
const char* src_signed = data.from_type.is_signed() ? "" : "un";
@ -196,7 +196,7 @@ void __ubsan_handle_implicit_conversion(const ImplicitConversionData& data, Valu
print_location(data.location);
}
void __ubsan_handle_invalid_builtin(const InvalidBuiltinData);
void __ubsan_handle_invalid_builtin(const InvalidBuiltinData) __attribute__((used));
void __ubsan_handle_invalid_builtin(const InvalidBuiltinData data)
{
dbgln("KUBSAN: passing invalid argument");
@ -204,7 +204,7 @@ void __ubsan_handle_invalid_builtin(const InvalidBuiltinData data)
}
// FIXME: Causes a triple fault on boot
void __ubsan_handle_pointer_overflow(const PointerOverflowData&, ValueHandle, ValueHandle);
void __ubsan_handle_pointer_overflow(const PointerOverflowData&, ValueHandle, ValueHandle) __attribute__((used));
void __ubsan_handle_pointer_overflow(const PointerOverflowData& data, ValueHandle base, ValueHandle result)
{
if (base == 0 && result == 0) {