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From: Igor Munkin via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Sergey Kaplun <skaplun@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH luajit 4/4] ARM64: Fix xpcall() error case (really).
Date: Thu, 10 Jun 2021 16:52:43 +0300
Message-ID: <20210610135243.GA3944@tarantool.org> (raw)
In-Reply-To: <c7b188e651fc921cac42576961e0617594b16dad.1621859367.git.skaplun@tarantool.org>

Sergey,

Thanks for the patch! There are still typos left after fixing Sergos
review comments (the commit message is taken from the branch).
Otherwise, LGTM.

| ARM64: Fix xpcall() error case (really).
|
| Thanks to François Perrad and Stefan Pejic.
|
| (cherry picked from commit d417ded17945b4211608d497d50b509e0274f5e0)
|
| Premature decrement of VM's RC register before switch to fff_fallback
| handler during processing `xpcall()` fast function leads to incorrect
| stack layout (not enough arguments on stack), when `xpcall()` calls

Typo: s/calls/is called/.

| without a second argument or if it is not a function (see
| <test/lua-Harness-tests/301-basic.t:832>

Typo: looks like line underfull (in LaTeX terms).

| test in lua-Harness test suite). While further error processing it leads
| to incorrect error message, due to stack inconsistency.
|
| This patch stores intermediate result into TMP1 register (it does not
| determine fallback's behaviour and there is no way to return from
| fallback back to xpcall processing with spoiled TMP1) and moves RC
| setting after the switch to the fallback handler.
|
| Sergey Kaplun:
| * added the description for the problem
|
| Resolves tarantool/tarantool#6093
| Part of tarantool/tarantool#5629

-- 
Best regards,
IM

  parent reply	other threads:[~2021-06-10 13:52 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-24 13:27 [Tarantool-patches] [PATCH luajit 0/4] Fix LuaJIT tests on aarch64, odroid Sergey Kaplun via Tarantool-patches
2021-05-24 13:27 ` [Tarantool-patches] [PATCH luajit 1/4] ARM, ARM64, PPC: Fix TSETR fallback Sergey Kaplun via Tarantool-patches
2021-06-02 12:04   ` Sergey Ostanevich via Tarantool-patches
2021-06-04 13:12     ` Sergey Kaplun via Tarantool-patches
2021-06-04 15:33       ` Sergey Ostanevich via Tarantool-patches
2021-06-04 15:39         ` Sergey Kaplun via Tarantool-patches
2021-06-10 13:51   ` Igor Munkin via Tarantool-patches
2021-06-11  8:47     ` Sergey Kaplun via Tarantool-patches
2021-06-12 13:09       ` Sergey Kaplun via Tarantool-patches
2021-05-24 13:27 ` [Tarantool-patches] [PATCH luajit 2/4] test: add skipcond on architectures for memprof Sergey Kaplun via Tarantool-patches
2021-06-02 12:28   ` Sergey Ostanevich via Tarantool-patches
2021-06-04 13:37     ` Sergey Kaplun via Tarantool-patches
2021-06-04 15:36       ` Sergey Ostanevich via Tarantool-patches
2021-06-04 16:18         ` Sergey Kaplun via Tarantool-patches
2021-06-10 13:51   ` Igor Munkin via Tarantool-patches
2021-06-11  8:18     ` Sergey Kaplun via Tarantool-patches
2021-05-24 13:27 ` [Tarantool-patches] [PATCH luajit 3/4] ARM64: Fix xpcall() error case Sergey Kaplun via Tarantool-patches
2021-06-02 12:47   ` Sergey Ostanevich via Tarantool-patches
2021-06-04 13:45     ` Sergey Kaplun via Tarantool-patches
2021-06-10 13:51   ` Igor Munkin via Tarantool-patches
2021-05-24 13:27 ` [Tarantool-patches] [PATCH luajit 4/4] ARM64: Fix xpcall() error case (really) Sergey Kaplun via Tarantool-patches
2021-06-02 14:43   ` Sergey Ostanevich via Tarantool-patches
2021-06-04 13:56     ` Sergey Kaplun via Tarantool-patches
2021-06-10 13:52   ` Igor Munkin via Tarantool-patches [this message]
2021-06-11  8:08     ` Sergey Kaplun via Tarantool-patches
2021-06-01 11:11 ` [Tarantool-patches] [PATCH luajit 0/4] Fix LuaJIT tests on aarch64, odroid Igor Munkin via Tarantool-patches
2021-06-12 16:02 ` Igor Munkin via Tarantool-patches

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