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[v3,0/3] accel/tcg: Make sure that tb->size != 0 after translation

Message ID 20210414134112.25620-1-iii@linux.ibm.com (mailing list archive)
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Series accel/tcg: Make sure that tb->size != 0 after translation | expand

Message

Ilya Leoshkevich April 14, 2021, 1:41 p.m. UTC
If arch-specific code generates a translation block of size 0,
tb_gen_code() may generate a spurious exception.

Fix s390x (patch 1) and ARM (patch 2) and add an assertion in order to
catch such situations early (patch 3).

v1: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02037.html
v1 -> v2: Fix target/s390x instead of trying to tolerate tb->size == 0
          in tb_gen_code().

v2: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02101.html
v2 -> v3: Split the common code change into a separate patch, add the
          ARM patch in order to fix
          https://gitlab.com/cohuck/qemu/-/jobs/1178409450

Ilya Leoshkevich (3):
  target/s390x: Fix translation exception on illegal instruction
  target/arm: Make sure that commpage's tb->size != 0
  accel/tcg: Assert that tb->size != 0 after translation

 accel/tcg/translate-all.c |  1 +
 target/arm/translate.c    |  1 +
 target/s390x/translate.c  | 16 +++++++++++-----
 3 files changed, 13 insertions(+), 5 deletions(-)