When using system mode we can get the CPU traps being taken via the
'riscv_trap' trace or the "-d int" qemu log. User mode does not a way of
logging/showing exceptions to users.
Add a trace in riscv_raise_exception() to allow qemu-riscv(32/64) users
to check all exceptions being thrown. This is particularly useful to
help identifying insns that are throwing SIGILLs.
As it is today we need to debug their binaries to identify where the
illegal insns are:
$ ~/work/qemu/build/qemu-riscv64 -cpu rv64 ./foo.out
Illegal instruction (core dumped)
After this change users can capture the trace and use EPC to pinpoint
the insn:
$ ~/work/qemu/build/qemu-riscv64 -cpu rv64 -trace riscv_exception ./foo.out
riscv_exception 8 (user_ecall) on epc 0x17cd2
riscv_exception 8 (user_ecall) on epc 0x17cda
riscv_exception 8 (user_ecall) on epc 0x17622
(...)
riscv_exception 2 (illegal_instruction) on epc 0x1053a
Illegal instruction (core dumped)
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20250106173734.412353-3-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Some trace points are attributed to the wrong source file. Happens
when we neglect to update trace-events for code motion, or add events
in the wrong place, or misspell the file name.
Clean up with help of scripts/cleanup-trace-events.pl. Funnies
requiring manual post-processing:
* accel/tcg/cputlb.c trace points are in trace-events.
* block.c and blockdev.c trace points are in block/trace-events.
* hw/block/nvme.c uses the preprocessor to hide its trace point use
from cleanup-trace-events.pl.
* hw/tpm/tpm_spapr.c uses pseudo trace point tpm_spapr_show_buffer to
guard debug code.
* include/hw/xen/xen_common.h trace points are in hw/xen/trace-events.
* linux-user/trace-events abbreviates a tedious list of filenames to
*/signal.c.
* net/colo-compare and net/filter-rewriter.c use pseudo trace points
colo_compare_miscompare and colo_filter_rewriter_debug to guard
debug code.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200806141334.3646302-5-armbru@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Use the always-compiled trace events, remove the now unused
RISCV_DEBUG_PMP definition.
Note pmpaddr_csr_read() could previously do out-of-bound accesses
passing addr_index >= MAX_RISCV_PMPS.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
