llvm-project.git/clang/test/Sema/patchable-function-entry-attr.cpp, branch main

[PowerPC] Support `-fpatchable-function-entry` on PPC64LE (#151569)

2025-09-09T20:43:18+00:00

This patch enables `-fpatchable-function-entry` on PPC64 little-endian
Linux. It is mutually exclusive with existing XRay instrumentation on
this target.

[Clang] include attribute scope in diagnostics (#144619)

2025-07-08T08:36:52+00:00

This patch updates diagnostics to print fully qualified attribute names,
including scope when present.

[Clang] show attribute namespace in diagnostics (#138519)

2025-05-08T21:49:01+00:00

This patch enhances Clang's diagnosis of an unknown attribute by
printing the attribute's namespace in the diagnostic text. e.g.,

```cpp
[[foo::nodiscard]] int f(); // warning: unknown attribute 'foo::nodiscard' ignored
```

[PowerPC] Support -fpatchable-function-entry (#92997)

2024-07-22T00:51:51+00:00

For now only PPC big endian Linux 32 and 64 bit are supported.

PPC little endian Linux has XRAY support for 64-bit.
PPC AIX has different patchable function entry implementations.

Fixes #63220
Fixes #57031

[Clang][LoongArch] Implement patchable function entry

2023-03-16T01:33:58+00:00

Similar to D98610 for RISCV.

This is going to be required by the upcoming Linux/LoongArch
[[ https://git.kernel.org/linus/4733f09d88074 | support for dynamic ftrace ]].

Reviewed By: SixWeining, MaskRay

Differential Revision: https://reviews.llvm.org/D141785

[RISCV] Support clang -fpatchable-function-entry && GNU function attribute 'patchable_function_entry'

2021-03-16T17:02:35+00:00

Similar to D72215 (AArch64) and D72220 (x86).

```
% clang -target riscv32 -march=rv64g -c -fpatchable-function-entry=2 a.c && llvm-objdump -dr a.o
...
0000000000000000 :
       0: 13 00 00 00   nop
       4: 13 00 00 00   nop

% clang -target riscv32 -march=rv64gc -c -fpatchable-function-entry=2 a.c && llvm-objdump -dr a.o
...
00000002 :
       2: 01 00         nop
       4: 01 00         nop
```

Recently the mainline kernel started to use -fpatchable-function-entry=8 for riscv (https://git.kernel.org/linus/afc76b8b80112189b6f11e67e19cf58301944814).

Differential Revision: https://reviews.llvm.org/D98610

[Sema] Allow function attribute patchable_function_entry on aarch64_be

2020-05-06T17:10:25+00:00

Reviewed By: nickdesaulniers

Differential Revision: https://reviews.llvm.org/D79495

Support function attribute patchable_function_entry

2020-01-10T17:57:34+00:00

This feature is generic. Make it applicable for AArch64 and X86 because
the backend has only implemented NOP insertion for AArch64 and X86.

Reviewed By: nickdesaulniers, aaron.ballman

Differential Revision: https://reviews.llvm.org/D72221