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| author | Philippe Mathieu-Daudé <philmd@redhat.com> | 2020-06-08 18:06:11 +0200 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2020-06-10 11:29:12 +0200 |
| commit | 1db889c71f37d5bad411b2ef83a69739d9d598f9 (patch) | |
| tree | 96fedb1faa2a6f34ff39a3d869d4178b02e673fc /hw/openrisc | |
| parent | c7a856b42e403e2b86c8ed026a3cd31e0a04973d (diff) | |
hw/openrisc/openrisc_sim: Add assertion to silence GCC warning
When compiling with GCC 10 (Fedora 32) using CFLAGS=-O2 we get:
CC or1k-softmmu/hw/openrisc/openrisc_sim.o
hw/openrisc/openrisc_sim.c: In function ‘openrisc_sim_init’:
hw/openrisc/openrisc_sim.c:87:42: error: ‘cpu_irqs[0]’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
87 | sysbus_connect_irq(s, i, cpu_irqs[i][irq_pin]);
| ~~~~~~~~^~~
While humans can tell smp_cpus will always be in the [1, 2] range,
(openrisc_sim_machine_init sets mc->max_cpus = 2), the compiler
can't.
Add an assertion to give the compiler a hint there's no use of
uninitialized data.
Buglink: https://bugs.launchpad.net/qemu/+bug/1874073
Reported-by: Martin Liška <mliska@suse.cz>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Stafford Horne <shorne@gmail.com>
Message-Id: <20200608160611.16966-1-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'hw/openrisc')
| -rw-r--r-- | hw/openrisc/openrisc_sim.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/openrisc/openrisc_sim.c b/hw/openrisc/openrisc_sim.c index d08ce61811..02f5259e5e 100644 --- a/hw/openrisc/openrisc_sim.c +++ b/hw/openrisc/openrisc_sim.c @@ -134,6 +134,7 @@ static void openrisc_sim_init(MachineState *machine) int n; unsigned int smp_cpus = machine->smp.cpus; + assert(smp_cpus >= 1 && smp_cpus <= 2); for (n = 0; n < smp_cpus; n++) { cpu = OPENRISC_CPU(cpu_create(machine->cpu_type)); if (cpu == NULL) { |