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accel/tcg: Zero-pad PC in TCG CPU exec trace lines 

In commit f0a08b0913 we changed the type of the PC from
target_ulong to vaddr.  In doing so we inadvertently dropped the
zero-padding on the PC in trace lines (the second item inside the []
in these lines).  They used to look like this on AArch64, for
instance:

Trace 0: 0x7f2260000100 [00000000/0000000040000000/00000061/ff200000]

and now they look like this:
Trace 0: 0x7f4f50000100 [00000000/40000000/00000061/ff200000]

and if the PC happens to be somewhere low like 0x5000
then the field is shown as /5000/.

This is because TARGET_FMT_lx is a "%08x" or "%016x" specifier,
depending on TARGET_LONG_SIZE, whereas VADDR_PRIx is just PRIx64
with no width specifier.

Restore the zero-padding by adding an 016 width specifier to
this tracing and a couple of others that were similarly recently
changed to use VADDR_PRIx without a width specifier.

We can't unfortunately restore the "32-bit guests are padded to
8 hex digits and 64-bit guests to 16 hex digits" behaviour so
easily.

Fixes: f0a08b0913 ("accel/tcg/cpu-exec.c: Widen pc to vaddr")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-id: 20230711165434.4123674-1-peter.maydell@linaro.org
master
Peter Maydell 2023-07-17 11:05:08 +01:00
parent eeb9578c36
commit e60a7d0d4d
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
accel/tcg/cpu-exec.c
View File

@ -298,7 +298,7 @@ static void log_cpu_exec(vaddr pc, CPUState *cpu,
if (qemu_log_in_addr_range(pc)) {
qemu_log_mask(CPU_LOG_EXEC,
"Trace %d: %p [%08" PRIx64
"/%" VADDR_PRIx "/%08x/%08x] %s\n",
"/%016" VADDR_PRIx "/%08x/%08x] %s\n",
cpu->cpu_index, tb->tc.ptr, tb->cs_base, pc,
tb->flags, tb->cflags, lookup_symbol(pc));
@ -487,7 +487,7 @@ cpu_tb_exec(CPUState *cpu, TranslationBlock *itb, int *tb_exit)
if (qemu_loglevel_mask(CPU_LOG_EXEC)) {
vaddr pc = log_pc(cpu, last_tb);
if (qemu_log_in_addr_range(pc)) {
qemu_log("Stopped execution of TB chain before %p [%"
qemu_log("Stopped execution of TB chain before %p [%016"
VADDR_PRIx "] %s\n",
last_tb->tc.ptr, pc, lookup_symbol(pc));
}

2
accel/tcg/translate-all.c
View File

@ -637,7 +637,7 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
if (qemu_loglevel_mask(CPU_LOG_EXEC)) {
vaddr pc = log_pc(cpu, tb);
if (qemu_log_in_addr_range(pc)) {
qemu_log("cpu_io_recompile: rewound execution of TB to %"
qemu_log("cpu_io_recompile: rewound execution of TB to %016"
VADDR_PRIx "\n", pc);
}
}