llvm-project.git/llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp, branch users/nico/python-2

[PAC][ELF][AArch64] Support signed personality function pointer (#119361)

2024-12-16T07:24:09+00:00

Re-apply #113148 after revert in #119331

If function pointer signing is enabled, sign personality function
pointer stored in `.DW.ref.__gxx_personality_v0` section with IA key,
0x7EAD = `ptrauth_string_discriminator("personality")` constant
discriminator and address diversity enabled.

Revert "[PAC][ELF][AArch64] Support signed personality function pointer" (#119331)

2024-12-10T06:12:25+00:00

Reverts llvm/llvm-project#113148

See buildbot failure
https://lab.llvm.org/buildbot/#/builders/190/builds/11048

[PAC][ELF][AArch64] Support signed personality function pointer (#113148)

2024-12-10T05:48:09+00:00

If function pointer signing is enabled, sign personality function
pointer stored in `.DW.ref.__gxx_personality_v0` section with IA key,
0x7EAD = `ptrauth_string_discriminator("personality")` constant
discriminator and address diversity enabled.

AsmPrinter: Avoid use of MachineFunction::getMMI (#99751)

2024-07-20T11:59:35+00:00

[IR] Remove Function.h include from Analysis.h (NFC) (#97056)

2024-06-28T14:41:00+00:00

Use a forward-declaration instead.

[AsmPrinter][AMDGPU] Generate uwtable entries in .eh_frame

2023-06-07T07:54:47+00:00

Consider only targets where `MCAsmInfo::ExceptionsType == ExceptionHandling::None`
and that support CFI (when `MCAsmInfo::UsesCFIForDebug` is set to true):
currently, only AMDGPU.

This patch enables the emission of CFI information in the .eh_frame
section when the uwtable attribute is present on a function.

Before, we could generate CFI information for debugging puproses only.

This patch prepares AMDGPU to support collecting GPU stack traces in the future.

I did a first implementation (https://reviews.llvm.org/D139024)
but at the time I had not realized that no other platform used
`UsesCFIForDebug`.

Reviewed By: scott.linder

Differential Revision: https://reviews.llvm.org/D151806

Move Personalities array from MachineModuleInfo to DwarfCFIException.

2023-01-16T23:15:01+00:00

It was only ever used there, already. The previous location seems
left-over from when the personality function was specified on a
per-landingpad basis, instead of per-function.

Cleanup unwind table emission code a bit.

2023-01-06T18:53:10+00:00

This change removes the `tidyLandingPads` function, which previously
had a few responsibilities:

1. Dealing with the deletion of an invoke, after MachineFunction lowering.
2. Dealing with the deletion of a landing pad BB, after MachineFunction lowering.
3. Cleaning up the type-id list generated by `MachineFunction::addLandingPad`.

Case 3 has been fixed in the generator, and the others are now handled
during table emission.

This change also removes `MachineFunction`'s `addCatchTypeInfo`,
`addFilterTypeInfo`, and `addCleanup` helper fns, as they had a single
caller, and being outlined didn't make it simpler.

Finally, as calling `tidyLandingPads` was effectively the only thing
`DwarfCFIExceptionBase` did, that class has been eliminated.

Refactor AsmPrinterHandler callbacks. NFCI.

2022-11-22T23:25:22+00:00

The existing behaviors and callbacks were overlapping and had very
confusing semantics: beginBasicBlock/endBasicBlock were not always
called, beginFragment/endFragment seemed like they were meant to mean
the same thing, but were slightly different, etc. This resulted in
confusing semantics, virtual method overloads, and control flow.

Remove the above, and replace with new beginBasicBlockSection and
endBasicBlockSection callbacks. And document them.

These are always called before the first and after the last blocks in
a function, even when basic-block-sections are disabled.

Cleanup includes: DebugInfo & CodeGen

2022-03-12T16:26:40+00:00

Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D121332