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From: "Alex Bennée" <alex.bennee@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Max Filippov" <jcmvbkbc@gmail.com>,
	"Alex Bennée" <alex.bennee@linaro.org>
Subject: [PATCH  v1 6/7] target/xtensa: add FIXME for translation memory leak
Date: Fri, 27 Mar 2020 09:49:44 +0000
Message-ID: <20200327094945.23768-7-alex.bennee@linaro.org> (raw)
In-Reply-To: <20200327094945.23768-1-alex.bennee@linaro.org>

Dynamically allocating a new structure within the DisasContext can
potentially leak as we can longjmp out of the translation loop (see
test_phys_mem). The proper fix would be to use static allocation
within the DisasContext but as the Xtensa translator imports it's code
from elsewhere I leave that as an exercise for the maintainer.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
---
 target/xtensa/translate.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c
index 8aa972cafdf..37f65b1f030 100644
--- a/target/xtensa/translate.c
+++ b/target/xtensa/translate.c
@@ -1174,6 +1174,11 @@ static void xtensa_tr_init_disas_context(DisasContextBase *dcbase,
     dc->callinc = ((tb_flags & XTENSA_TBFLAG_CALLINC_MASK) >>
                    XTENSA_TBFLAG_CALLINC_SHIFT);
 
+    /*
+     * FIXME: This will leak when a failed instruction load or similar
+     * event causes us to longjump out of the translation loop and
+     * hence not clean-up in xtensa_tr_tb_stop
+     */
     if (dc->config->isa) {
         dc->insnbuf = xtensa_insnbuf_alloc(dc->config->isa);
         dc->slotbuf = xtensa_insnbuf_alloc(dc->config->isa);
-- 
2.20.1



  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27  9:49 [PATCH for 5.0 v1 0/7] A selection of sanitiser fixes Alex Bennée
2020-03-27  9:49 ` [PATCH v1 1/7] elf-ops: bail out if we have no function symbols Alex Bennée
2020-03-27 10:53   ` Philippe Mathieu-Daudé
2020-03-27 11:10     ` Philippe Mathieu-Daudé
2020-03-27 11:45   ` Peter Maydell
2020-03-27 22:09   ` Richard Henderson
2020-03-27  9:49 ` [PATCH v1 2/7] linux-user: protect fcntl64 with an #ifdef Alex Bennée
2020-03-27 10:40   ` Laurent Vivier
2020-03-27 22:10   ` Richard Henderson
2020-03-27  9:49 ` [PATCH v1 3/7] tests/tcg: remove extraneous pasting macros Alex Bennée
2020-03-27 10:54   ` Philippe Mathieu-Daudé
2020-03-27 22:11   ` Richard Henderson
2020-03-27  9:49 ` [PATCH v1 4/7] linux-user: more debug for init_guest_space Alex Bennée
2020-03-27 10:50   ` Laurent Vivier
2020-03-27  9:49 ` [PATCH v1 5/7] fpu/softfloat: avoid undefined behaviour when normalising empty sigs Alex Bennée
2020-03-27 10:09   ` Peter Maydell
2020-03-27 22:27     ` Richard Henderson
2020-03-27 22:33       ` Peter Maydell
2020-03-27 10:13   ` Aleksandar Markovic
2020-03-27 10:31     ` Alex Bennée
2020-03-27  9:49 ` Alex Bennée [this message]
2020-03-27  9:49 ` [PATCH v1 7/7] gdbstub: fix compiler complaining Alex Bennée
2020-03-27 10:56   ` Philippe Mathieu-Daudé
2020-03-27 10:53 ` [PATCH for 5.0 v1 0/7] A selection of sanitiser fixes no-reply

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