Messages in this thread |  | | From | Arnaldo Carvalho de Melo <> | Date | Mon, 16 Dec 2019 12:07:20 -0300 | Subject | ANNOUNCE: pahole v1.16 (Fixes + BTF_KIND_FUNC) |
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Hi,
The v1.16 release of pahole and its friends is out, available at the usual places:
Main git repo:
git://git.kernel.org/pub/scm/devel/pahole/pahole.git
Mirror git repo:
https://github.com/acmel/dwarves.git
tarball + gpg signature:
https://fedorapeople.org/~acme/dwarves/dwarves-1.16.tar.xz https://fedorapeople.org/~acme/dwarves/dwarves-1.16.tar.bz2 https://fedorapeople.org/~acme/dwarves/dwarves-1.16.tar.sign
Best Regards,
- Arnaldo
v1.16 changes:
BTF encoder:
Andrii Nakryiko <andriin@fb.com>:
- Preserve and encode exported functions as BTF_KIND_FUNC.
Add encoding of DWARF's DW_TAG_subprogram_type into BTF's BTF_KIND_FUNC (plus corresponding BTF_KIND_FUNC_PROTO). Only exported functions are converted for now. This allows to capture all the exported kernel functions, same subset that's exposed through /proc/kallsyms.
BTF loader:
Arnaldo Carvalho de Melo <acme@redhat.com>
- Add support for BTF_KIND_FUNC
Some changes to the fprintf routines were needed, as BTF has as the function type just a BTF_KIND_FUNC_PROTO, while DWARF has as the type for a function its return value type. With a function->btf flag this was overcome and all the other goodies in pfunct are present.
Pretty printer:
Arnaldo Carvalho de Melo:
- Account inline type __aligned__ member types for spacing:
union { refcount_t rcu_users; /* 2568 4 */ struct callback_head rcu __attribute__((__aligned__(8))); /* 2568 16 */ - } __attribute__((__aligned__(8))); /* 2568 16 */ + } __attribute__((__aligned__(8))); /* 2568 16 */ struct pipe_inode_info * splice_pipe; /* 2584 8 */
- Fix alignment of class members that are structs/enums/unions
E.g. look at that 'completion' member in this struct:
struct cpu_stop_done { atomic_t nr_todo; /* 0 4 */ int ret; /* 4 4 */ - struct completion completion; /* 8 32 */ + struct completion completion; /* 8 32 */
/* size: 40, cachelines: 1, members: 3 */ /* last cacheline: 40 bytes */
- Fixup handling classes with no members, solving a NULL deref.
Gareth Lloyd <gareth.lloyd@uk.ibm.com>:
- Avoid infinite loop trying to determine type with static data member of its own type.
RPM spec file.
Jiri Olsa <jolsa@redhat.com>
Add dwarves dependency on libdwarves1.
pfunct:
Arnaldo Carvalho de Melo <acme@redhat.com>
- type->type == 0 is void, fix --compile for that
We were using the fall back for that, i.e. 'return 0;' was being emitted for a function returning void, noticed with using BTF as the format.
pdwtags:
- Print DW_TAG_subroutine_type as well
So that we can see at least via pdwtags those tags, be it from DWARF of BTF.
core:
Arnaldo Carvalho de Melo <acme@redhat.com>
Fix ptr_table__add_with_id() handling of pt->nr_entries, covering how BTF variables IDs are encoded.
pglobal:
Arnaldo Carvalho de Melo <acme@redhat.com>:
- Allow passing the format path specifier, to use with BTF
I.e. now we can, just like with pahole, use:
pglobal -F btf --variable foo.o
To get the global variables.
Tree wide:
Arnaldo Carvalho de Melo <acme@redhat.com>:
- Fixup issues pointed out by various coverity reports.
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