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8 Commits

Author SHA1 Message Date
Maryam Moghadas
2bd0d770af
[PowerPC] Support -fpatchable-function-entry on PPC64LE (#151569) 
This patch enables `-fpatchable-function-entry` on PPC64 little-endian
Linux. It is mutually exclusive with existing XRay instrumentation on
this target.
 2025-09-09 16:43:18 -04:00
Oleksandr T.
2e8e254d18
[Clang] include attribute scope in diagnostics (#144619) 
This patch updates diagnostics to print fully qualified attribute names,
including scope when present.
 2025-07-08 11:36:52 +03:00
Oleksandr T.
61b435ec4d
[Clang] show attribute namespace in diagnostics (#138519) 
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
```
 2025-05-09 00:49:01 +03:00
Chen Zheng
43213002b9
[PowerPC] Support -fpatchable-function-entry (#92997) 
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
 2024-07-22 08:51:51 +08:00
WANG Xuerui
db5dfec9d4 [Clang][LoongArch] Implement patchable function entry 
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
 2023-03-16 09:33:58 +08:00
Fangrui Song
6ab8927931 [RISCV] Support clang -fpatchable-function-entry && GNU function attribute 'patchable_function_entry' 
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 <main>:
       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 <main>:
       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
 2021-03-16 10:02:35 -07:00
Fangrui Song
57a1c1be53 [Sema] Allow function attribute patchable_function_entry on aarch64_be 
Reviewed By: nickdesaulniers

Differential Revision: https://reviews.llvm.org/D79495
 2020-05-06 10:10:25 -07:00
Fangrui Song
a44c434b68 Support function attribute patchable_function_entry 
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
 2020-01-10 09:57:34 -08:00