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To: Thomas Monjalon <thomas@monjalon.net>, dev@dpdk.org, techboard@dpdk.org
Cc: david.marchand@redhat.com, bruce.richardson@intel.com,
Ray Kinsella <mdr@ashroe.eu>, Neil Horman <nhorman@tuxdriver.com>
References: <20200624093627.2603992-1-thomas@monjalon.net>
<20200928000049.3245920-1-thomas@monjalon.net>
From: Kevin Traynor <ktraynor@redhat.com>
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Date: Wed, 30 Sep 2020 10:01:59 +0100
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Subject: Re: [dpdk-dev] [dpdk-techboard] [PATCH v2] eal: simplify exit
functions
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On 28/09/2020 01:00, Thomas Monjalon wrote:
> The option RTE_EAL_ALWAYS_PANIC_ON_ERROR was off by default,
> and not customizable with meson. It is completely removed.
>
> The function rte_dump_registers is a trace of the bare metal support
> era, and was not supported in userland. It is completely removed.
>
> Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> Acked-by: Ray Kinsella <mdr@ashroe.eu>
> ---
> The deprecation notice for this removal has been missed.
> I assume it would not hurt anybody to remove this useless function
> from DPDK 20.11. Asking the Technical Board for confirmation.
> ---
Acked-by: Kevin Traynor <ktraynor@redhat.com>
> app/test/test_debug.c | 3 ---
> doc/guides/howto/debug_troubleshoot.rst | 2 +-
> doc/guides/rel_notes/release_20_11.rst | 2 ++
> lib/librte_eal/common/eal_common_debug.c | 17 +----------------
> lib/librte_eal/include/rte_debug.h | 7 -------
> lib/librte_eal/rte_eal_version.map | 1 -
> 6 files changed, 4 insertions(+), 28 deletions(-)
>
> diff --git a/app/test/test_debug.c b/app/test/test_debug.c
> index 25eab97e2a..834a7386f5 100644
> --- a/app/test/test_debug.c
> +++ b/app/test/test_debug.c
> @@ -66,13 +66,11 @@ test_exit_val(int exit_val)
> }
> wait(&status);
> printf("Child process status: %d\n", status);
> -#ifndef RTE_EAL_ALWAYS_PANIC_ON_ERROR
> if(!WIFEXITED(status) || WEXITSTATUS(status) != (uint8_t)exit_val){
> printf("Child process terminated with incorrect status (expected = %d)!\n",
> exit_val);
> return -1;
> }
> -#endif
> return 0;
> }
>
> @@ -113,7 +111,6 @@ static int
> test_debug(void)
> {
> rte_dump_stack();
> - rte_dump_registers();
> if (test_panic() < 0)
> return -1;
> if (test_exit() < 0)
> diff --git a/doc/guides/howto/debug_troubleshoot.rst b/doc/guides/howto/debug_troubleshoot.rst
> index 5a46f5fba3..50bd32a8ef 100644
> --- a/doc/guides/howto/debug_troubleshoot.rst
> +++ b/doc/guides/howto/debug_troubleshoot.rst
> @@ -314,7 +314,7 @@ Custom worker function :numref:`dtg_distributor_worker`.
> * For high-performance execution logic ensure running it on correct NUMA
> and non-master core.
>
> - * Analyze run logic with ``rte_dump_stack``, ``rte_dump_registers`` and
> + * Analyze run logic with ``rte_dump_stack`` and
> ``rte_memdump`` for more insights.
>
> * Make use of objdump to ensure opcode is matching to the desired state.
> diff --git a/doc/guides/rel_notes/release_20_11.rst b/doc/guides/rel_notes/release_20_11.rst
> index f377ab8e87..c0b83e9554 100644
> --- a/doc/guides/rel_notes/release_20_11.rst
> +++ b/doc/guides/rel_notes/release_20_11.rst
> @@ -184,6 +184,8 @@ ABI Changes
> Also, make sure to start the actual text at the margin.
> =======================================================
>
> +* eal: Removed the not implemented function ``rte_dump_registers()``.
> +
> * ``ethdev`` changes
>
> * Following device operation function pointers moved
> diff --git a/lib/librte_eal/common/eal_common_debug.c b/lib/librte_eal/common/eal_common_debug.c
> index 722468754d..15418e957f 100644
> --- a/lib/librte_eal/common/eal_common_debug.c
> +++ b/lib/librte_eal/common/eal_common_debug.c
> @@ -7,14 +7,6 @@
> #include <rte_log.h>
> #include <rte_debug.h>
>
> -/* not implemented */
> -void
> -rte_dump_registers(void)
> -{
> - return;
> -}
> -
> -/* call abort(), it will generate a coredump if enabled */
> void
> __rte_panic(const char *funcname, const char *format, ...)
> {
> @@ -25,8 +17,7 @@ __rte_panic(const char *funcname, const char *format, ...)
> rte_vlog(RTE_LOG_CRIT, RTE_LOGTYPE_EAL, format, ap);
> va_end(ap);
> rte_dump_stack();
> - rte_dump_registers();
> - abort();
> + abort(); /* generate a coredump if enabled */
> }
>
> /*
> @@ -46,14 +37,8 @@ rte_exit(int exit_code, const char *format, ...)
> rte_vlog(RTE_LOG_CRIT, RTE_LOGTYPE_EAL, format, ap);
> va_end(ap);
>
> -#ifndef RTE_EAL_ALWAYS_PANIC_ON_ERROR
> if (rte_eal_cleanup() != 0)
> RTE_LOG(CRIT, EAL,
> "EAL could not release all resources\n");
> exit(exit_code);
> -#else
> - rte_dump_stack();
> - rte_dump_registers();
> - abort();
> -#endif
> }
> diff --git a/lib/librte_eal/include/rte_debug.h b/lib/librte_eal/include/rte_debug.h
> index 50052c5a90..c4bc71ce28 100644
> --- a/lib/librte_eal/include/rte_debug.h
> +++ b/lib/librte_eal/include/rte_debug.h
> @@ -26,13 +26,6 @@ extern "C" {
> */
> void rte_dump_stack(void);
>
> -/**
> - * Dump the registers of the calling core to the console.
> - *
> - * Note: Not implemented in a userapp environment; use gdb instead.
> - */
> -void rte_dump_registers(void);
> -
> /**
> * Provide notification of a critical non-recoverable error and terminate
> * execution abnormally.
> diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
> index c32461c663..cd1a90b95f 100644
> --- a/lib/librte_eal/rte_eal_version.map
> +++ b/lib/librte_eal/rte_eal_version.map
> @@ -38,7 +38,6 @@ DPDK_21 {
> rte_devargs_remove;
> rte_devargs_type_count;
> rte_dump_physmem_layout;
> - rte_dump_registers;
> rte_dump_stack;
> rte_dump_tailq;
> rte_eal_alarm_cancel;
>