systemtap: upgrade 4.5 -> 4.6

support for 64-bit RISC-V architecture, liveness analysis for guru-mode write operations,
bpf syscall_any and abort() tapsets, bpf foreach iteration of multi-key arrays,
return of inter-cpu output ordering

Changelog is as follows:
= SystemTap frontend (stap) changes
- stap-prep now tries to download the main kernel debuginfo file from
  a debuginfod server, if configured.

= SystemTap backend changes
- SystemTap has added support for the 64-bit RISC-V architecture.
- SystemTap now uses DynInst to perform a liveness analysis on
  target variables and warn when a guru-mode modification to a variable
  will have no effect. The liveness analysis is currently done on
  x86_64, PowerPC, and AArch64.
- The kernel-user relayfs transport again sorts messages into a total
  time order across CPUs.  High output-volume scripts may need a
  larger "-s BUF" parameter to reliably transfer.  "-b" bulk mode
  is also available again as an alternative.
- The bpf backend now supports foreach iteration in multi-key associative arrays.

= SystemTap tapset changes
- Updated syscall_any tapset mapping to include newer syscalls.
- syscall_any tapset can be used by the bpf backend.
- abort() tapset can be used by the bpf backend.

= Known issues with this release
- There are known issues on kernel 5.10+ after adapting to set_fs()
  removal, with some memory accesses that previously returned valid data
  instead returning -EFAULT (see PR26811).
- An sdt probe cannot parse a parameter that uses a segment register.
  (PR13429)
- The presence of a line such as
      *CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
  in older linux kernel Makefile unnecessarily reduces debuginfo quality,
  consider removing that line if you build kernels.  Linux 5.10+ fixes this.

= Bugs fixed for this release <https://sourceware.org/PR#####>
6562     $SYSTEMTAP_DEBUGINFO_PATH does not work
15724     stapdyn looking for libdyninstAPI_RT.a
26839     Systemtap build failures with clang
27820     abort() tapset not implemented in the bpf mode
27829     support for floating point values passed through sdt.h markers
27864     loc2stap.cxx assertion failure on loc_unavailable type location, rawhide
27881     failed to extend vma mapped entry when the address is adjacent
27903     handle f33 glibc $$parms
27932     List Python as a prerequisite in README
27933     Use of unitialized functioncall synthetic field in
27934     failure to attach statement
27940     The /* pc=0x... */ is no longer printed by "stap -v -L 'kernel.function("*")'
27942     testsuite/systemtap.base/perf.sh drop bashism
27984     stap skipping partially-inlined instance, but it is not inline function actually
28070     extend vma end address to the different module
28079     adapt to kernel 5.14 task_struct.__state change
28084     autoconf-x86-uniregs.c compile failled with -Werror cause STAPCONF_X86_UNIREGS missing
28140     kernel panic on tracepoint activation in stap module
28184     task_fd_lookup failed on linux 5.11
28244     linux objtool imposes symbol length limits on generated function names
28384     finish nfs_proc tapset port 4.3 string server_ip
28443     Provide syscall_any tapset for bpf
28449     loss of cross-cpu output ordering
28544     procfs_bpf.exp regression due to string handling error
28557     module kprobe insertion on modern kernels

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
---
 meta/recipes-kernel/systemtap/systemtap_git.inc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Thank you Wang, glad you are able to find time to include the changelogs
into your upgrades - I'm something of a 'last resort' person for them, and
usually do not do it.

Alex

On Mon, 22 Nov 2021 at 16:00, wangmy <wangmy@fujitsu.com> wrote:

> support for 64-bit RISC-V architecture, liveness analysis for guru-mode
> write operations,
> bpf syscall_any and abort() tapsets, bpf foreach iteration of multi-key
> arrays,
> return of inter-cpu output ordering
>
> Changelog is as follows:
> = SystemTap frontend (stap) changes
> - stap-prep now tries to download the main kernel debuginfo file from
>   a debuginfod server, if configured.
>
> = SystemTap backend changes
> - SystemTap has added support for the 64-bit RISC-V architecture.
> - SystemTap now uses DynInst to perform a liveness analysis on
>   target variables and warn when a guru-mode modification to a variable
>   will have no effect. The liveness analysis is currently done on
>   x86_64, PowerPC, and AArch64.
> - The kernel-user relayfs transport again sorts messages into a total
>   time order across CPUs.  High output-volume scripts may need a
>   larger "-s BUF" parameter to reliably transfer.  "-b" bulk mode
>   is also available again as an alternative.
> - The bpf backend now supports foreach iteration in multi-key associative
> arrays.
>
> = SystemTap tapset changes
> - Updated syscall_any tapset mapping to include newer syscalls.
> - syscall_any tapset can be used by the bpf backend.
> - abort() tapset can be used by the bpf backend.
>
> = Known issues with this release
> - There are known issues on kernel 5.10+ after adapting to set_fs()
>   removal, with some memory accesses that previously returned valid data
>   instead returning -EFAULT (see PR26811).
> - An sdt probe cannot parse a parameter that uses a segment register.
>   (PR13429)
> - The presence of a line such as
>       *CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
>   in older linux kernel Makefile unnecessarily reduces debuginfo quality,
>   consider removing that line if you build kernels.  Linux 5.10+ fixes
> this.
>
> = Bugs fixed for this release <https://sourceware.org/PR#####>
> 6562     $SYSTEMTAP_DEBUGINFO_PATH does not work
> 15724     stapdyn looking for libdyninstAPI_RT.a
> 26839     Systemtap build failures with clang
> 27820     abort() tapset not implemented in the bpf mode
> 27829     support for floating point values passed through sdt.h markers
> 27864     loc2stap.cxx assertion failure on loc_unavailable type location,
> rawhide
> 27881     failed to extend vma mapped entry when the address is adjacent
> 27903     handle f33 glibc $$parms
> 27932     List Python as a prerequisite in README
> 27933     Use of unitialized functioncall synthetic field in
> 27934     failure to attach statement
> 27940     The /* pc=0x... */ is no longer printed by "stap -v -L
> 'kernel.function("*")'
> 27942     testsuite/systemtap.base/perf.sh drop bashism
> 27984     stap skipping partially-inlined instance, but it is not inline
> function actually
> 28070     extend vma end address to the different module
> 28079     adapt to kernel 5.14 task_struct.__state change
> 28084     autoconf-x86-uniregs.c compile failled with -Werror cause
> STAPCONF_X86_UNIREGS missing
> 28140     kernel panic on tracepoint activation in stap module
> 28184     task_fd_lookup failed on linux 5.11
> 28244     linux objtool imposes symbol length limits on generated function
> names
> 28384     finish nfs_proc tapset port 4.3 string server_ip
> 28443     Provide syscall_any tapset for bpf
> 28449     loss of cross-cpu output ordering
> 28544     procfs_bpf.exp regression due to string handling error
> 28557     module kprobe insertion on modern kernels
>
> Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
> ---
>  meta/recipes-kernel/systemtap/systemtap_git.inc | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/meta/recipes-kernel/systemtap/systemtap_git.inc
> b/meta/recipes-kernel/systemtap/systemtap_git.inc
> index 25546f7cb2..22b07f1516 100644
> --- a/meta/recipes-kernel/systemtap/systemtap_git.inc
> +++ b/meta/recipes-kernel/systemtap/systemtap_git.inc
> @@ -1,7 +1,7 @@
>  LICENSE = "GPLv2"
>  LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
> -SRCREV = "7f6992539fb22c93c21ac30c94508bf655d496a7"
> -PV = "4.5"
> +SRCREV = "2e9f2f6967e44ce2bf8f34932b5bdd738ece2161"
> +PV = "4.6"
>
>  SRC_URI = "git://sourceware.org/git/systemtap.git;branch=master \
>
> file://0001-Do-not-let-configure-write-a-python-location-into-th.patch \
> --
> 2.25.1
>
>
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