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linux-user: Add '-one-insn-per-tb' option equivalent to '-singlestep'

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The '-singlestep' option is confusing, because it doesn't actually
have anything to do with single-stepping the CPU. What it does do
is force TCG emulation to put one guest instruction in each TB,
which can be useful in some situations.

Create a new command line argument -one-insn-per-tb, so we can
document that -singlestep is just a deprecated synonym for it,
and eventually perhaps drop it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230417164041.684562-5-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2023-04-17 17:40:35 +01:00
parent 0e33928cd9
commit e99c1f89b2
2 changed files with 12 additions and 4 deletions
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7
docs/user/main.rst
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@ -93,8 +93,13 @@ Debug options:
``-g port``
Wait gdb connection to port
``-one-insn-per-tb``
Run the emulation with one guest instruction per translation block.
This slows down emulation a lot, but can be useful in some situations,
such as when trying to analyse the logs produced by the ``-d`` option.
``-singlestep``
Run the emulation in single step mode.
This is a deprecated synonym for the ``-one-insn-per-tb`` option.
Environment variables: