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[LLDB] Fix error returns in CastToBasicType and CastToEnumType in ValueObject. (#117401)
Update the error returns in ValueObject::CastToBasicType and ValueObject::CastToEnumType to create new errors and return a ValueObjectConstResult with the error, rather tnan updating the error in (and returning) the input ValueObject.
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‎lldb/source/ValueObject/ValueObject.cpp‎

Lines changed: 83 additions & 79 deletions
Original file line numberDiff line numberDiff line change
@@ -3194,17 +3194,17 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
31943194
GetCompilerType().IsPointerType() || GetCompilerType().IsNullPtrType();
31953195
bool is_float = GetCompilerType().IsFloat();
31963196
bool is_integer = GetCompilerType().IsInteger();
3197+
ExecutionContext exe_ctx(GetExecutionContextRef());
31973198

3198-
if (!type.IsScalarType()) {
3199-
m_error = Status::FromErrorString("target type must be a scalar");
3200-
return GetSP();
3201-
}
3199+
if (!type.IsScalarType())
3200+
return ValueObjectConstResult::Create(
3201+
exe_ctx.GetBestExecutionContextScope(),
3202+
Status::FromErrorString("target type must be a scalar"));
32023203

3203-
if (!is_scalar && !is_enum && !is_pointer) {
3204-
m_error =
3205-
Status::FromErrorString("argument must be a scalar, enum, or pointer");
3206-
return GetSP();
3207-
}
3204+
if (!is_scalar && !is_enum && !is_pointer)
3205+
return ValueObjectConstResult::Create(
3206+
exe_ctx.GetBestExecutionContextScope(),
3207+
Status::FromErrorString("argument must be a scalar, enum, or pointer"));
32083208

32093209
lldb::TargetSP target = GetTargetSP();
32103210
uint64_t type_byte_size = 0;
@@ -3215,16 +3215,15 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
32153215
val_byte_size = temp.value();
32163216

32173217
if (is_pointer) {
3218-
if (!type.IsInteger() && !type.IsBoolean()) {
3219-
m_error =
3220-
Status::FromErrorString("target type must be an integer or boolean");
3221-
return GetSP();
3222-
}
3223-
if (!type.IsBoolean() && type_byte_size < val_byte_size) {
3224-
m_error = Status::FromErrorString(
3225-
"target type cannot be smaller than the pointer type");
3226-
return GetSP();
3227-
}
3218+
if (!type.IsInteger() && !type.IsBoolean())
3219+
return ValueObjectConstResult::Create(
3220+
exe_ctx.GetBestExecutionContextScope(),
3221+
Status::FromErrorString("target type must be an integer or boolean"));
3222+
if (!type.IsBoolean() && type_byte_size < val_byte_size)
3223+
return ValueObjectConstResult::Create(
3224+
exe_ctx.GetBestExecutionContextScope(),
3225+
Status::FromErrorString(
3226+
"target type cannot be smaller than the pointer type"));
32283227
}
32293228

32303229
if (type.IsBoolean()) {
@@ -3236,12 +3235,12 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
32363235
if (float_value_or_err)
32373236
return ValueObject::CreateValueObjectFromBool(
32383237
target, !float_value_or_err->isZero(), "result");
3239-
else {
3240-
m_error = Status::FromErrorStringWithFormat(
3241-
"cannot get value as APFloat: %s",
3242-
llvm::toString(float_value_or_err.takeError()).c_str());
3243-
return GetSP();
3244-
}
3238+
else
3239+
return ValueObjectConstResult::Create(
3240+
exe_ctx.GetBestExecutionContextScope(),
3241+
Status::FromErrorStringWithFormat(
3242+
"cannot get value as APFloat: %s",
3243+
llvm::toString(float_value_or_err.takeError()).c_str()));
32453244
}
32463245
}
32473246

@@ -3255,13 +3254,12 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
32553254
int_value_or_err->extOrTrunc(type_byte_size * CHAR_BIT);
32563255
return ValueObject::CreateValueObjectFromAPInt(target, ext, type,
32573256
"result");
3258-
} else {
3259-
m_error = Status::FromErrorStringWithFormat(
3260-
"cannot get value as APSInt: %s",
3261-
llvm::toString(int_value_or_err.takeError()).c_str());
3262-
;
3263-
return GetSP();
3264-
}
3257+
} else
3258+
return ValueObjectConstResult::Create(
3259+
exe_ctx.GetBestExecutionContextScope(),
3260+
Status::FromErrorStringWithFormat(
3261+
"cannot get value as APSInt: %s",
3262+
llvm::toString(int_value_or_err.takeError()).c_str()));
32653263
} else if (is_scalar && is_float) {
32663264
llvm::APSInt integer(type_byte_size * CHAR_BIT, !type.IsSigned());
32673265
bool is_exact;
@@ -3273,12 +3271,12 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
32733271

32743272
// Casting floating point values that are out of bounds of the target
32753273
// type is undefined behaviour.
3276-
if (status & llvm::APFloatBase::opInvalidOp) {
3277-
m_error = Status::FromErrorStringWithFormat(
3278-
"invalid type cast detected: %s",
3279-
llvm::toString(float_value_or_err.takeError()).c_str());
3280-
return GetSP();
3281-
}
3274+
if (status & llvm::APFloatBase::opInvalidOp)
3275+
return ValueObjectConstResult::Create(
3276+
exe_ctx.GetBestExecutionContextScope(),
3277+
Status::FromErrorStringWithFormat(
3278+
"invalid type cast detected: %s",
3279+
llvm::toString(float_value_or_err.takeError()).c_str()));
32823280
return ValueObject::CreateValueObjectFromAPInt(target, integer, type,
32833281
"result");
32843282
}
@@ -3297,10 +3295,11 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
32973295
return ValueObject::CreateValueObjectFromAPFloat(target, f, type,
32983296
"result");
32993297
} else {
3300-
m_error = Status::FromErrorStringWithFormat(
3301-
"cannot get value as APSInt: %s",
3302-
llvm::toString(int_value_or_err.takeError()).c_str());
3303-
return GetSP();
3298+
return ValueObjectConstResult::Create(
3299+
exe_ctx.GetBestExecutionContextScope(),
3300+
Status::FromErrorStringWithFormat(
3301+
"cannot get value as APSInt: %s",
3302+
llvm::toString(int_value_or_err.takeError()).c_str()));
33043303
}
33053304
} else {
33063305
if (is_integer) {
@@ -3312,10 +3311,11 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
33123311
return ValueObject::CreateValueObjectFromAPFloat(target, f, type,
33133312
"result");
33143313
} else {
3315-
m_error = Status::FromErrorStringWithFormat(
3316-
"cannot get value as APSInt: %s",
3317-
llvm::toString(int_value_or_err.takeError()).c_str());
3318-
return GetSP();
3314+
return ValueObjectConstResult::Create(
3315+
exe_ctx.GetBestExecutionContextScope(),
3316+
Status::FromErrorStringWithFormat(
3317+
"cannot get value as APSInt: %s",
3318+
llvm::toString(int_value_or_err.takeError()).c_str()));
33193319
}
33203320
}
33213321
if (is_float) {
@@ -3327,34 +3327,37 @@ lldb::ValueObjectSP ValueObject::CastToBasicType(CompilerType type) {
33273327
return ValueObject::CreateValueObjectFromAPFloat(target, f, type,
33283328
"result");
33293329
} else {
3330-
m_error = Status::FromErrorStringWithFormat(
3331-
"cannot get value as APFloat: %s",
3332-
llvm::toString(float_value_or_err.takeError()).c_str());
3333-
return GetSP();
3330+
return ValueObjectConstResult::Create(
3331+
exe_ctx.GetBestExecutionContextScope(),
3332+
Status::FromErrorStringWithFormat(
3333+
"cannot get value as APFloat: %s",
3334+
llvm::toString(float_value_or_err.takeError()).c_str()));
33343335
}
33353336
}
33363337
}
33373338
}
33383339

3339-
m_error = Status::FromErrorString("Unable to perform requested cast");
3340-
return GetSP();
3340+
return ValueObjectConstResult::Create(
3341+
exe_ctx.GetBestExecutionContextScope(),
3342+
Status::FromErrorString("Unable to perform requested cast"));
33413343
}
33423344

33433345
lldb::ValueObjectSP ValueObject::CastToEnumType(CompilerType type) {
33443346
bool is_enum = GetCompilerType().IsEnumerationType();
33453347
bool is_integer = GetCompilerType().IsInteger();
33463348
bool is_float = GetCompilerType().IsFloat();
3349+
ExecutionContext exe_ctx(GetExecutionContextRef());
33473350

3348-
if (!is_enum && !is_integer && !is_float) {
3349-
m_error = Status::FromErrorString(
3350-
"argument must be an integer, a float, or an enum");
3351-
return GetSP();
3352-
}
3351+
if (!is_enum && !is_integer && !is_float)
3352+
return ValueObjectConstResult::Create(
3353+
exe_ctx.GetBestExecutionContextScope(),
3354+
Status::FromErrorString(
3355+
"argument must be an integer, a float, or an enum"));
33533356

3354-
if (!type.IsEnumerationType()) {
3355-
m_error = Status::FromErrorString("target type must be an enum");
3356-
return GetSP();
3357-
}
3357+
if (!type.IsEnumerationType())
3358+
return ValueObjectConstResult::Create(
3359+
exe_ctx.GetBestExecutionContextScope(),
3360+
Status::FromErrorString("target type must be an enum"));
33583361

33593362
lldb::TargetSP target = GetTargetSP();
33603363
uint64_t byte_size = 0;
@@ -3371,34 +3374,35 @@ lldb::ValueObjectSP ValueObject::CastToEnumType(CompilerType type) {
33713374

33723375
// Casting floating point values that are out of bounds of the target
33733376
// type is undefined behaviour.
3374-
if (status & llvm::APFloatBase::opInvalidOp) {
3375-
m_error = Status::FromErrorStringWithFormat(
3376-
"invalid type cast detected: %s",
3377-
llvm::toString(value_or_err.takeError()).c_str());
3378-
return GetSP();
3379-
}
3377+
if (status & llvm::APFloatBase::opInvalidOp)
3378+
return ValueObjectConstResult::Create(
3379+
exe_ctx.GetBestExecutionContextScope(),
3380+
Status::FromErrorStringWithFormat(
3381+
"invalid type cast detected: %s",
3382+
llvm::toString(value_or_err.takeError()).c_str()));
33803383
return ValueObject::CreateValueObjectFromAPInt(target, integer, type,
33813384
"result");
3382-
} else {
3383-
m_error = Status::FromErrorString("cannot get value as APFloat");
3384-
return GetSP();
3385-
}
3385+
} else
3386+
return ValueObjectConstResult::Create(
3387+
exe_ctx.GetBestExecutionContextScope(),
3388+
Status::FromErrorString("cannot get value as APFloat"));
33863389
} else {
33873390
// Get the value as APSInt and extend or truncate it to the requested size.
33883391
auto value_or_err = GetValueAsAPSInt();
33893392
if (value_or_err) {
33903393
llvm::APSInt ext = value_or_err->extOrTrunc(byte_size * CHAR_BIT);
33913394
return ValueObject::CreateValueObjectFromAPInt(target, ext, type,
33923395
"result");
3393-
} else {
3394-
m_error = Status::FromErrorStringWithFormat(
3395-
"cannot get value as APSInt: %s",
3396-
llvm::toString(value_or_err.takeError()).c_str());
3397-
return GetSP();
3398-
}
3396+
} else
3397+
return ValueObjectConstResult::Create(
3398+
exe_ctx.GetBestExecutionContextScope(),
3399+
Status::FromErrorStringWithFormat(
3400+
"cannot get value as APSInt: %s",
3401+
llvm::toString(value_or_err.takeError()).c_str()));
33993402
}
3400-
m_error = Status::FromErrorString("Cannot perform requested cast");
3401-
return GetSP();
3403+
return ValueObjectConstResult::Create(
3404+
exe_ctx.GetBestExecutionContextScope(),
3405+
Status::FromErrorString("Cannot perform requested cast"));
34023406
}
34033407

34043408
ValueObject::EvaluationPoint::EvaluationPoint() : m_mod_id(), m_exe_ctx_ref() {}

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