https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114431
David Faust changed:
What|Removed |Added
CC||david.faust at oracle dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113566
Bug ID: 113566
Summary: btf: incorrect BTF_KIND_DATASEC entries for variables
which are optimized out
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111735
David Faust changed:
What|Removed |Added
CC||david.faust at oracle dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112849
Bug ID: 112849
Summary: btf: wrong BTF_KIND_DATSEC entries for extern
variables without known section
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112849
--- Comment #1 from David Faust ---
Simple reproducer. Note how clang does not emit an entry
in BTF_KIND_DATASEC for 'extern int a'.
$ cat a.c
extern int a;
int b;
int foo (void)
{
return a + b;
}
$
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109558
--- Comment #2 from David Faust ---
Patches for btf_type_tag WIP, but DWARF for type_tags in certain cases is
incorrect seemingly due to PR debug/110439. I am still investigating.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110439
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109558
--- Comment #1 from David Faust ---
v1 patch series for btf_decl_tag:
https://gcc.gnu.org/pipermail/gcc-patches/2023-July/624156.html
This also adds infrastructure which will be used for btf_type_tag.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110439
David Faust changed:
What|Removed |Added
CC||jemarch at gcc dot gnu.org
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110439
Bug ID: 110439
Summary: Missing DW_TAG_typedef for variable with attribute of
typedef'd type
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110073
--- Comment #9 from David Faust ---
(In reply to Alex Coplan from comment #8)
> Thanks for the follow-up fix and apologies for the mid-air collision, I
> didn't see the %zu problem on the target I was testing.
No problem, thanks for the fixes
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110073
--- Comment #6 from David Faust ---
(In reply to Iain Sandoe from comment #5)
> (In reply to David Faust from comment #4)
> > (In reply to Iain Sandoe from comment #3)
> > > (In reply to Iain Sandoe from comment #2)
> > > > there seems to be a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110073
--- Comment #4 from David Faust ---
(In reply to Iain Sandoe from comment #3)
> (In reply to Iain Sandoe from comment #2)
> > there seems to be a second fail on x86_64 darwin on line 970.
>
> I tried the alternate patch on a number of x86_64,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110073
--- Comment #1 from David Faust ---
Created attachment 55234
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55234=edit
alternate proposed patch
Thank you for catching this, and for the fix!
With the proposed patch on linux x86_64 I see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109253
--- Comment #1 from David Faust ---
See:
https://gcc.gnu.org/pipermail/gcc-patches/2022-December/608152.html
Also related as Andrew pointed out in the above thread:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48783
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109068
Bug ID: 109068
Summary: bpf: "error: too many function arguments for eBPF" for
always_inline function
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108790
Bug ID: 108790
Summary: bpf: gcc emits malformed ldxdw instruction at -O2
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107844
--- Comment #5 from David Faust ---
(In reply to Andrew Pinski from comment #4)
> (In reply to David Faust from comment #3)
> > Thanks for the info Andrew. I'll look at __builtin_offsetof.
> >
> > As for the implementation in clang, I can
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107844
--- Comment #3 from David Faust ---
Thanks for the info Andrew. I'll look at __builtin_offsetof.
As for the implementation in clang, I can point to some bits relevant to
the builtin itself:
llvm-project/clang/lib/CodeGen/CGBuiltin.cpp
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107844
--- Comment #1 from David Faust ---
Looks like this is a result of the combination of how the bpf_core_field_exists
macro is defined and some sort of optimization(?) happening in the C frontend.
Consider:
struct S {
unsigned short x;
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107843
--- Comment #1 from David Faust ---
Looks like this is an issue with passing void* where an enum type is
expected in a function call. This is not specific to the BPF backend.
Not entirely clear to me whether this is expected or a bug, but it
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
David Faust changed:
What|Removed |Added
Attachment #54017|0 |1
is obsolete|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
--- Comment #13 from David Faust ---
Created attachment 54017
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54017=edit
DATASEC entries for extern funcs
Applies on top of 54002: updated patch
Adds emission of DATASEC entries for extern
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
David Faust changed:
What|Removed |Added
Attachment #53993|0 |1
is obsolete|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
--- Comment #8 from David Faust ---
(In reply to James Hilliard from comment #5)
> (In reply to David Faust from comment #4)
> > Created attachment 53993 [details]
> > proposed patch
> >
> > Should fix the remaining issues with 'extern'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
--- Comment #4 from David Faust ---
Created attachment 53993
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53993=edit
proposed patch
Should fix the remaining issues with 'extern' linkage and the missing 'const'
modifier (and includes
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
--- Comment #3 from David Faust ---
There are two remaining issues:
1. We are missing support for 'linkage=extern' encoding for variables,
so 'bpf_link_fops' and others are incorrectly marked with 'linkage=global'
instead.
2.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107846
--- Comment #1 from David Faust ---
I think this is a bug in the test itself (or with these macros from libbpf).
libbpf/src/bpf_endian.h
#define ___bpf_mvb(x, b, n, m) ((__u##b)(x) << (b-(n+1)*8) >> (b-8) << (m*8))
#define ___bpf_swab16(x)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107481
Bug ID: 107481
Summary: bpf: add __builtin_preserve_enum_value
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107480
Bug ID: 107480
Summary: bpf: add __builtin_preserve_type_info
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107479
Bug ID: 107479
Summary: bpf: add __builtin_btf_type_id
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106745
David Faust changed:
What|Removed |Added
CC||david.faust at oracle dot com
---
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