From: sashiko-bot@kernel.org
To: "Tengda Wu" <wutengda@huaweicloud.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v7 12/15] perf annotate-arm64: Support 'add' instruction tracking
Date: Tue, 13 Oct 2026 13:47:00 +0000 [thread overview]
Message-ID: <sashiko-outbox-169860@kernel.org> (raw)
In-Reply-To: <6f048c44fafe387ebe8e02815dc860e069c5b43c.1791629326.git.wutengda@huaweicloud.com>
> Extend update_insn_state_arm64() to track 'add' instructions for
> structure member address calculation.
>
> Unlike x86, the arm64 'add' instruction has an extra base register among
> its source operands. Therefore, in terms of propagating the data type,
> it is essentially performing a 'mov', except that before the 'mov', it
> first needs to be updated by adding the offset or reg2.
>
> A real-world example is shown below:
>
> ffff80008001c9a8 <flush_ptrace_hw_breakpoint>:
> ffff80008001c9c4: add x19, x0, #0xeb8 // x0 (task_struct*) + 0xeb8 -> x19
> * ffff80008001c9d0: ldr x0, [x19]
>
> Before this commit, the type flow broke at the 'add' instruction,
> [ ... ]
> found by insn track: 0(reg19) type-offset=0xeb8
> final result: type='struct task_struct'
>
> Reviewed-by: Ian Rogers <irogers@google.com>
> Signed-off-by: Tengda Wu <wutengda@huaweicloud.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/cover.1791629326.git.wutengda@huaweicloud.com?part=12
next prev parent reply other threads:[~2026-10-13 13:47 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-13 13:27 [PATCH v7 00/15] perf annotate arm64: Support instruction tracking for data type profiling Tengda Wu
2026-10-13 13:27 ` [PATCH v7 01/15] perf annotate-data: Extract invalidate_reg_state() as a common helper Tengda Wu
2026-10-13 13:34 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 02/15] perf annotate-arm64: Enable instruction tracking support Tengda Wu
2026-10-13 13:38 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 03/15] perf annotate-data: Add arch_get_reg_offset helper Tengda Wu
2026-10-13 13:38 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 04/15] perf annotate-arm64: Track return type after call instructions Tengda Wu
2026-10-13 13:36 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 05/15] perf annotate-arm64: Support load instruction tracking Tengda Wu
2026-10-13 13:38 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 06/15] perf annotate-arm64: Support store " Tengda Wu
2026-10-13 13:36 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 07/15] perf annotate-data: Expand type_state_reg imm_value to u64 Tengda Wu
2026-10-13 13:45 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 08/15] perf annotate-data: Track imm_value for stack variables Tengda Wu
2026-10-13 13:47 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 09/15] perf annotate-x86: Delete stale stack state on store of untracked register Tengda Wu
2026-10-13 13:44 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 10/15] perf annotate-arm64: Support stack variable tracking Tengda Wu
2026-10-13 13:44 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 11/15] perf annotate-arm64: Support 'mov' instruction tracking Tengda Wu
2026-10-13 13:45 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 12/15] perf annotate-arm64: Support 'add' " Tengda Wu
2026-10-13 13:47 ` sashiko-bot [this message]
2026-10-13 13:28 ` [PATCH v7 13/15] perf annotate-arm64: Support 'adrp' instruction to track global variables Tengda Wu
2026-10-13 13:57 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 14/15] perf annotate-arm64: Support per-cpu variable access tracking Tengda Wu
2026-10-13 13:49 ` sashiko-bot
2026-10-13 13:28 ` [PATCH v7 15/15] perf annotate-arm64: Support 'mrs' instruction to track 'current' pointer Tengda Wu
2026-10-13 14:03 ` sashiko-bot
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