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| author | Markus Armbruster <armbru@redhat.com> | 2014-04-25 12:44:22 +0200 |
|---|---|---|
| committer | Andreas Färber <afaerber@suse.de> | 2014-05-05 19:08:49 +0200 |
| commit | 65cd9064e13f2388d3bd9c815826f5db6b0b13ec (patch) | |
| tree | 1a0c27b53afbf5924ffb08482fff7d2f3732c520 /target-i386/cpu.c | |
| parent | a7737e4496aa3c1c8c3a4b4b9d5e44875fe21e12 (diff) | |
| download | qemu-65cd9064e13f2388d3bd9c815826f5db6b0b13ec.tar.gz | |
qom: Clean up fragile use of error_is_set() in set() methods
Using error_is_set(ERRP) to find out whether a function failed is
either wrong, fragile, or unnecessarily opaque. It's wrong when ERRP
may be null, because errors go undetected when it is. It's fragile
when proving ERRP non-null involves a non-local argument. Else, it's
unnecessarily opaque (see commit 84d18f0).
I guess the error_is_set(errp) in the ObjectProperty set() methods are
merely fragile right now, because I can't find a call chain that
passes a null errp argument.
Make the code more robust and more obviously correct: receive the
error in a local variable, then propagate it through the parameter.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'target-i386/cpu.c')
| -rw-r--r-- | target-i386/cpu.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 8fd1497dc4..8f193a9330 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -1300,10 +1300,12 @@ static void x86_cpuid_version_set_family(Object *obj, Visitor *v, void *opaque, CPUX86State *env = &cpu->env; const int64_t min = 0; const int64_t max = 0xff + 0xf; + Error *local_err = NULL; int64_t value; - visit_type_int(v, &value, name, errp); - if (error_is_set(errp)) { + visit_type_int(v, &value, name, &local_err); + if (local_err) { + error_propagate(errp, local_err); return; } if (value < min || value > max) { @@ -1339,10 +1341,12 @@ static void x86_cpuid_version_set_model(Object *obj, Visitor *v, void *opaque, CPUX86State *env = &cpu->env; const int64_t min = 0; const int64_t max = 0xff; + Error *local_err = NULL; int64_t value; - visit_type_int(v, &value, name, errp); - if (error_is_set(errp)) { + visit_type_int(v, &value, name, &local_err); + if (local_err) { + error_propagate(errp, local_err); return; } if (value < min || value > max) { @@ -1375,10 +1379,12 @@ static void x86_cpuid_version_set_stepping(Object *obj, Visitor *v, CPUX86State *env = &cpu->env; const int64_t min = 0; const int64_t max = 0xf; + Error *local_err = NULL; int64_t value; - visit_type_int(v, &value, name, errp); - if (error_is_set(errp)) { + visit_type_int(v, &value, name, &local_err); + if (local_err) { + error_propagate(errp, local_err); return; } if (value < min || value > max) { @@ -1511,10 +1517,12 @@ static void x86_cpuid_set_tsc_freq(Object *obj, Visitor *v, void *opaque, X86CPU *cpu = X86_CPU(obj); const int64_t min = 0; const int64_t max = INT64_MAX; + Error *local_err = NULL; int64_t value; - visit_type_int(v, &value, name, errp); - if (error_is_set(errp)) { + visit_type_int(v, &value, name, &local_err); + if (local_err) { + error_propagate(errp, local_err); return; } if (value < min || value > max) { |