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| /openbmc/qemu/hw/timer/ |
| H A D | pxa2xx_timer.c | diff e702fba83108519618046a2a09235a62e3a81595 Wed Apr 22 08:31:52 CDT 2020 Philippe Mathieu-Daudé <philmd@redhat.com> hw/timer/pxa2xx_timer: Add assertion to silent static analyzer warning
pxa2xx_timer_tick4() takes an opaque pointer, then calls
pxa2xx_timer_update4(), so the static analyzer can not
verify that the 'n < 8':
425 static void pxa2xx_timer_tick4(void *opaque)
426 {
427 PXA2xxTimer4 *t = (PXA2xxTimer4 *) opaque;
428 PXA2xxTimerInfo *i = (PXA2xxTimerInfo *) t->tm.info;
429
430 pxa2xx_timer_tick(&t->tm);
433 if (t->control & (1 << 6))
434 pxa2xx_timer_update4(i, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), t->tm.num - 4);
135 static void pxa2xx_timer_update4(void *opaque, uint64_t now_qemu, int n)
136 {
137 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
140 static const int counters[8] = { 0, 0, 0, 0, 4, 4, 6, 6 };
142
143 if (s->tm4[n].control & (1 << 7))
144 counter = n;
145 else
146 counter = counters[n];
Add an assert() to give the static analyzer a hint, this fixes a
warning reported by Clang static code analyzer:
CC hw/timer/pxa2xx_timer.o
hw/timer/pxa2xx_timer.c:146:17: warning: Assigned value is garbage or undefined
counter = counters[n];
^ ~~~~~~~~~~~
Reported-by: Clang Static Analyzer
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200422133152.16770-10-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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