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author | Peter Maydell <peter.maydell@linaro.org> | 2023-04-17 17:40:35 +0100 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2023-05-02 15:47:40 +0100 |
commit | e99c1f89b2c9e779f17f3abab48ca78392977741 (patch) | |
tree | 7a4efbcddd4e3943e7f1979c7595b8cab1f70927 | |
parent | 0e33928cd9b445b2331122154ebe8679aa2ff86e (diff) | |
download | qemu-e99c1f89b2c9e779f17f3abab48ca78392977741.zip qemu-e99c1f89b2c9e779f17f3abab48ca78392977741.tar.gz qemu-e99c1f89b2c9e779f17f3abab48ca78392977741.tar.bz2 |
linux-user: Add '-one-insn-per-tb' option equivalent to '-singlestep'
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
-rw-r--r-- | docs/user/main.rst | 7 | ||||
-rw-r--r-- | linux-user/main.c | 9 |
2 files changed, 12 insertions, 4 deletions
diff --git a/docs/user/main.rst b/docs/user/main.rst index 6f2ffa0..f9ac701 100644 --- a/docs/user/main.rst +++ b/docs/user/main.rst @@ -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: diff --git a/linux-user/main.c b/linux-user/main.c index c7020b4..5defe5a 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -409,7 +409,7 @@ static void handle_arg_reserved_va(const char *arg) reserved_va = val ? val - 1 : 0; } -static void handle_arg_singlestep(const char *arg) +static void handle_arg_one_insn_per_tb(const char *arg) { opt_one_insn_per_tb = true; } @@ -500,8 +500,11 @@ static const struct qemu_argument arg_table[] = { "logfile", "write logs to 'logfile' (default stderr)"}, {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, "pagesize", "set the host page size to 'pagesize'"}, - {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, - "", "run in singlestep mode"}, + {"one-insn-per-tb", + "QEMU_ONE_INSN_PER_TB", false, handle_arg_one_insn_per_tb, + "", "run with one guest instruction per emulated TB"}, + {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_one_insn_per_tb, + "", "deprecated synonym for -one-insn-per-tb"}, {"strace", "QEMU_STRACE", false, handle_arg_strace, "", "log system calls"}, {"seed", "QEMU_RAND_SEED", true, handle_arg_seed, |