/
util.py
356 lines (323 loc) · 18 KB
/
util.py
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import gdb
from zig.types import *
def is_null(ptr):
"""Tests if a pointer is null.
Reads better than writing `int(ptr) == 0` all the time.
"""
return int(ptr) == 0
def is_slice(type):
return (ZigTypeId(type['id']) == ZigTypeId.ZigTypeIdStruct
and bool(type['data']['structure']['is_slice']))
# From the GNU libstdc++ printer
def get_basic_type(type):
if type.code == gdb.TYPE_CODE_REF:
type = type.target()
type = type.unqualified().strip_typedefs()
return type.tag
def follow_ref(val):
"""Follows a pointer or reference and returns other values
immediately."""
try:
return val.referenced_value()
except gdb.error:
return val
def value_items(val):
"""Returns an iterator over the `key, value` pairs of fields of a
value."""
for field in val.type.fields():
yield (field.name, val[field])
def buf_to_string(buf):
"""Creates a Python string from a Buf variable."""
ls = buf['list']
length = ls['length']
return ls['items'].string(encoding='utf-8', length=length)
def runtime_hint(const_val):
assert (ConstValSpecial(const_val['special'])
== ConstValSpecial.ConstValSpecialRuntime)
type = const_val['type']
if is_null(type):
return None
type_id = ZigTypeId(type['id'])
if type_id == ZigTypeId.ZigTypeIdPointer:
variant = 'rh_ptr'
elif type_id == ZigTypeId.ZigTypeIdErrorUnion:
variant = 'rh_error_union'
elif type_id == ZigTypeId.ZigTypeIdOptional:
variant = 'rh_maybe'
elif is_slice(type):
variant = 'rh_slice'
else:
return None
return variant
def const_data(const_val):
assert (ConstValSpecial(const_val['special']) ==
ConstValSpecial.ConstValSpecialStatic)
type = const_val['type']
if is_null(type):
return None
type_id = ZigTypeId(type['id'])
if type_id == ZigTypeId.ZigTypeIdFloat:
bit_count = type['data']['floating']['bit_count']
if bit_count == 16:
variant = 'x_f16'
elif bit_count == 32:
variant = 'x_f32'
elif bit_count == 64:
variant = 'x_f64'
elif bit_count == 128:
variant = 'x_f128'
else:
raise ValueError(f'unexpected float size: {bit_count}')
return variant
variants = {
ZigTypeId.ZigTypeIdInt: 'x_bigint',
ZigTypeId.ZigTypeIdComptimeInt: 'x_bigint',
ZigTypeId.ZigTypeIdComptimeFloat: 'x_bigfloat',
ZigTypeId.ZigTypeIdBool: 'x_bool',
ZigTypeId.ZigTypeIdBoundFn: 'x_bound_fn',
ZigTypeId.ZigTypeIdMetaType: 'x_type',
ZigTypeId.ZigTypeIdOptional: 'x_optional',
ZigTypeId.ZigTypeIdErrorUnion: 'x_err_union',
ZigTypeId.ZigTypeIdErrorSet: 'x_err_set',
ZigTypeId.ZigTypeIdEnum: 'x_enum_tag',
ZigTypeId.ZigTypeIdStruct: 'x_struct',
ZigTypeId.ZigTypeIdUnion: 'x_union',
ZigTypeId.ZigTypeIdArray: 'x_array',
ZigTypeId.ZigTypeIdPointer: 'x_ptr',
ZigTypeId.ZigTypeIdNamespace: 'x_import',
ZigTypeId.ZigTypeIdArgTuple: 'x_arg_tuple',
}
return variants.get(type_id)
def type_data(type):
id = ZigTypeId(type['id'])
variants = {
ZigTypeId.ZigTypeIdPointer: 'pointer',
ZigTypeId.ZigTypeIdInt: 'integral',
ZigTypeId.ZigTypeIdFloat: 'floating',
ZigTypeId.ZigTypeIdArray: 'array',
ZigTypeId.ZigTypeIdStruct: 'structure',
ZigTypeId.ZigTypeIdOptional: 'maybe',
ZigTypeId.ZigTypeIdErrorUnion: 'error_union',
ZigTypeId.ZigTypeIdErrorSet: 'error_set',
ZigTypeId.ZigTypeIdEnum: 'enumeration',
ZigTypeId.ZigTypeIdUnion: 'unionation',
ZigTypeId.ZigTypeIdFn: 'fn',
ZigTypeId.ZigTypeIdBoundFn: 'bound_fn',
ZigTypeId.ZigTypeIdPromise: 'promise',
ZigTypeId.ZigTypeIdVector: 'vector',
}
return variants.get(id)
def cast_instruction(inst):
id = IrInstructionId(inst['id'])
variants = {
IrInstructionId.IrInstructionIdDeclVarSrc: 'IrInstructionDeclVarSrc',
IrInstructionId.IrInstructionIdDeclVarGen: 'IrInstructionDeclVarGen',
IrInstructionId.IrInstructionIdBr: 'IrInstructionBr',
IrInstructionId.IrInstructionIdCondBr: 'IrInstructionCondBr',
IrInstructionId.IrInstructionIdSwitchBr: 'IrInstructionSwitchBr',
IrInstructionId.IrInstructionIdSwitchVar: 'IrInstructionSwitchVar',
IrInstructionId.IrInstructionIdSwitchTarget: 'IrInstructionSwitchTarget',
IrInstructionId.IrInstructionIdPhi: 'IrInstructionPhi',
IrInstructionId.IrInstructionIdUnOp: 'IrInstructionUnOp',
IrInstructionId.IrInstructionIdBinOp: 'IrInstructionBinOp',
IrInstructionId.IrInstructionIdLoadPtr: 'IrInstructionLoadPtr',
IrInstructionId.IrInstructionIdStorePtr: 'IrInstructionStorePtr',
IrInstructionId.IrInstructionIdFieldPtr: 'IrInstructionFieldPtr',
IrInstructionId.IrInstructionIdStructFieldPtr: 'IrInstructionStructFieldPtr',
IrInstructionId.IrInstructionIdUnionFieldPtr: 'IrInstructionUnionFieldPtr',
IrInstructionId.IrInstructionIdElemPtr: 'IrInstructionElemPtr',
IrInstructionId.IrInstructionIdVarPtr: 'IrInstructionVarPtr',
IrInstructionId.IrInstructionIdCall: 'IrInstructionCall',
IrInstructionId.IrInstructionIdConst: 'IrInstructionConst',
IrInstructionId.IrInstructionIdReturn: 'IrInstructionReturn',
IrInstructionId.IrInstructionIdCast: 'IrInstructionCast',
IrInstructionId.IrInstructionIdContainerInitList: 'IrInstructionContainerInitList',
IrInstructionId.IrInstructionIdContainerInitFields: 'IrInstructionContainerInitFields',
IrInstructionId.IrInstructionIdStructInit: 'IrInstructionStructInit',
IrInstructionId.IrInstructionIdUnionInit: 'IrInstructionUnionInit',
IrInstructionId.IrInstructionIdUnreachable: 'IrInstructionUnreachable',
IrInstructionId.IrInstructionIdTypeOf: 'IrInstructionTypeOf',
IrInstructionId.IrInstructionIdToPtrType: 'IrInstructionToPtrType',
IrInstructionId.IrInstructionIdPtrTypeChild: 'IrInstructionPtrTypeChild',
IrInstructionId.IrInstructionIdSetCold: 'IrInstructionSetCold',
IrInstructionId.IrInstructionIdSetRuntimeSafety: 'IrInstructionSetRuntimeSafety',
IrInstructionId.IrInstructionIdSetFloatMode: 'IrInstructionSetFloatMode',
IrInstructionId.IrInstructionIdArrayType: 'IrInstructionArrayType',
IrInstructionId.IrInstructionIdPromiseType: 'IrInstructionPromiseType',
IrInstructionId.IrInstructionIdSliceType: 'IrInstructionSliceType',
IrInstructionId.IrInstructionIdAsm: 'IrInstructionAsm',
IrInstructionId.IrInstructionIdSizeOf: 'IrInstructionSizeOf',
IrInstructionId.IrInstructionIdTestNonNull: 'IrInstructionTestNonNull',
IrInstructionId.IrInstructionIdOptionalUnwrapPtr: 'IrInstructionOptionalUnwrapPtr',
IrInstructionId.IrInstructionIdOptionalWrap: 'IrInstructionOptionalWrap',
IrInstructionId.IrInstructionIdUnionTag: 'IrInstructionUnionTag',
IrInstructionId.IrInstructionIdClz: 'IrInstructionClz',
IrInstructionId.IrInstructionIdCtz: 'IrInstructionCtz',
IrInstructionId.IrInstructionIdPopCount: 'IrInstructionPopCount',
IrInstructionId.IrInstructionIdImport: 'IrInstructionImport',
IrInstructionId.IrInstructionIdCImport: 'IrInstructionCImport',
IrInstructionId.IrInstructionIdCInclude: 'IrInstructionCInclude',
IrInstructionId.IrInstructionIdCDefine: 'IrInstructionCDefine',
IrInstructionId.IrInstructionIdCUndef: 'IrInstructionCUndef',
IrInstructionId.IrInstructionIdRef: 'IrInstructionRef',
IrInstructionId.IrInstructionIdCompileErr: 'IrInstructionCompileErr',
IrInstructionId.IrInstructionIdCompileLog: 'IrInstructionCompileLog',
IrInstructionId.IrInstructionIdErrName: 'IrInstructionErrName',
IrInstructionId.IrInstructionIdEmbedFile: 'IrInstructionEmbedFile',
IrInstructionId.IrInstructionIdCmpxchgSrc: 'IrInstructionCmpxchgSrc',
IrInstructionId.IrInstructionIdCmpxchgGen: 'IrInstructionCmpxchgGen',
IrInstructionId.IrInstructionIdFence: 'IrInstructionFence',
IrInstructionId.IrInstructionIdTruncate: 'IrInstructionTruncate',
IrInstructionId.IrInstructionIdIntCast: 'IrInstructionIntCast',
IrInstructionId.IrInstructionIdFloatCast: 'IrInstructionFloatCast',
IrInstructionId.IrInstructionIdIntToFloat: 'IrInstructionIntToFloat',
IrInstructionId.IrInstructionIdFloatToInt: 'IrInstructionFloatToInt',
IrInstructionId.IrInstructionIdBoolToInt: 'IrInstructionBoolToInt',
IrInstructionId.IrInstructionIdIntType: 'IrInstructionIntType',
IrInstructionId.IrInstructionIdVectorType: 'IrInstructionVectorType',
IrInstructionId.IrInstructionIdBoolNot: 'IrInstructionBoolNot',
IrInstructionId.IrInstructionIdMemset: 'IrInstructionMemset',
IrInstructionId.IrInstructionIdMemcpy: 'IrInstructionMemcpy',
IrInstructionId.IrInstructionIdSlice: 'IrInstructionSlice',
IrInstructionId.IrInstructionIdMemberCount: 'IrInstructionMemberCount',
IrInstructionId.IrInstructionIdMemberType: 'IrInstructionMemberType',
IrInstructionId.IrInstructionIdMemberName: 'IrInstructionMemberName',
IrInstructionId.IrInstructionIdBreakpoint: 'IrInstructionBreakpoint',
IrInstructionId.IrInstructionIdReturnAddress: 'IrInstructionReturnAddress',
IrInstructionId.IrInstructionIdFrameAddress: 'IrInstructionFrameAddress',
IrInstructionId.IrInstructionIdHandle: 'IrInstructionHandle',
IrInstructionId.IrInstructionIdAlignOf: 'IrInstructionAlignOf',
IrInstructionId.IrInstructionIdOverflowOp: 'IrInstructionOverflowOp',
IrInstructionId.IrInstructionIdTestErr: 'IrInstructionTestErr',
IrInstructionId.IrInstructionIdUnwrapErrCode: 'IrInstructionUnwrapErrCode',
IrInstructionId.IrInstructionIdUnwrapErrPayload: 'IrInstructionUnwrapErrPayload',
IrInstructionId.IrInstructionIdErrWrapCode: 'IrInstructionErrWrapCode',
IrInstructionId.IrInstructionIdErrWrapPayload: 'IrInstructionErrWrapPayload',
IrInstructionId.IrInstructionIdFnProto: 'IrInstructionFnProto',
IrInstructionId.IrInstructionIdTestComptime: 'IrInstructionTestComptime',
IrInstructionId.IrInstructionIdPtrCastSrc: 'IrInstructionPtrCastSrc',
IrInstructionId.IrInstructionIdPtrCastGen: 'IrInstructionPtrCastGen',
IrInstructionId.IrInstructionIdBitCast: 'IrInstructionBitCast',
IrInstructionId.IrInstructionIdWidenOrShorten: 'IrInstructionWidenOrShorten',
IrInstructionId.IrInstructionIdIntToPtr: 'IrInstructionIntToPtr',
IrInstructionId.IrInstructionIdPtrToInt: 'IrInstructionPtrToInt',
IrInstructionId.IrInstructionIdIntToEnum: 'IrInstructionIntToEnum',
IrInstructionId.IrInstructionIdEnumToInt: 'IrInstructionEnumToInt',
IrInstructionId.IrInstructionIdIntToErr: 'IrInstructionIntToErr',
IrInstructionId.IrInstructionIdErrToInt: 'IrInstructionErrToInt',
IrInstructionId.IrInstructionIdCheckSwitchProngs: 'IrInstructionCheckSwitchProngs',
IrInstructionId.IrInstructionIdCheckStatementIsVoid: 'IrInstructionCheckStatementIsVoid',
IrInstructionId.IrInstructionIdTypeName: 'IrInstructionTypeName',
IrInstructionId.IrInstructionIdDeclRef: 'IrInstructionDeclRef',
IrInstructionId.IrInstructionIdPanic: 'IrInstructionPanic',
IrInstructionId.IrInstructionIdTagName: 'IrInstructionTagName',
IrInstructionId.IrInstructionIdTagType: 'IrInstructionTagType',
IrInstructionId.IrInstructionIdFieldParentPtr: 'IrInstructionFieldParentPtr',
IrInstructionId.IrInstructionIdByteOffsetOf: 'IrInstructionByteOffsetOf',
IrInstructionId.IrInstructionIdBitOffsetOf: 'IrInstructionBitOffsetOf',
IrInstructionId.IrInstructionIdTypeInfo: 'IrInstructionTypeInfo',
IrInstructionId.IrInstructionIdTypeId: 'IrInstructionTypeId',
IrInstructionId.IrInstructionIdSetEvalBranchQuota: 'IrInstructionSetEvalBranchQuota',
IrInstructionId.IrInstructionIdPtrType: 'IrInstructionPtrType',
IrInstructionId.IrInstructionIdAlignCast: 'IrInstructionAlignCast',
IrInstructionId.IrInstructionIdOpaqueType: 'IrInstructionOpaqueType',
IrInstructionId.IrInstructionIdSetAlignStack: 'IrInstructionSetAlignStack',
IrInstructionId.IrInstructionIdArgType: 'IrInstructionArgType',
IrInstructionId.IrInstructionIdExport: 'IrInstructionExport',
IrInstructionId.IrInstructionIdErrorReturnTrace: 'IrInstructionErrorReturnTrace',
IrInstructionId.IrInstructionIdErrorUnion: 'IrInstructionErrorUnion',
IrInstructionId.IrInstructionIdCancel: 'IrInstructionCancel',
IrInstructionId.IrInstructionIdGetImplicitAllocator: 'IrInstructionGetImplicitAllocator',
IrInstructionId.IrInstructionIdCoroId: 'IrInstructionCoroId',
IrInstructionId.IrInstructionIdCoroAlloc: 'IrInstructionCoroAlloc',
IrInstructionId.IrInstructionIdCoroSize: 'IrInstructionCoroSize',
IrInstructionId.IrInstructionIdCoroBegin: 'IrInstructionCoroBegin',
IrInstructionId.IrInstructionIdCoroAllocFail: 'IrInstructionCoroAllocFail',
IrInstructionId.IrInstructionIdCoroSuspend: 'IrInstructionCoroSuspend',
IrInstructionId.IrInstructionIdCoroEnd: 'IrInstructionCoroEnd',
IrInstructionId.IrInstructionIdCoroFree: 'IrInstructionCoroFree',
IrInstructionId.IrInstructionIdCoroResume: 'IrInstructionCoroResume',
IrInstructionId.IrInstructionIdCoroSave: 'IrInstructionCoroSave',
IrInstructionId.IrInstructionIdCoroPromise: 'IrInstructionCoroPromise',
IrInstructionId.IrInstructionIdCoroAllocHelper: 'IrInstructionCoroAllocHelper',
IrInstructionId.IrInstructionIdAtomicRmw: 'IrInstructionAtomicRmw',
IrInstructionId.IrInstructionIdAtomicLoad: 'IrInstructionAtomicLoad',
IrInstructionId.IrInstructionIdPromiseResultType: 'IrInstructionPromiseResultType',
IrInstructionId.IrInstructionIdAwaitBookkeeping: 'IrInstructionAwaitBookkeeping',
IrInstructionId.IrInstructionIdSaveErrRetAddr: 'IrInstructionSaveErrRetAddr',
IrInstructionId.IrInstructionIdAddImplicitReturnType: 'IrInstructionAddImplicitReturnType',
IrInstructionId.IrInstructionIdMergeErrRetTraces: 'IrInstructionMergeErrRetTraces',
IrInstructionId.IrInstructionIdMarkErrRetTracePtr: 'IrInstructionMarkErrRetTracePtr',
IrInstructionId.IrInstructionIdSqrt: 'IrInstructionSqrt',
IrInstructionId.IrInstructionIdBswap: 'IrInstructionBswap',
IrInstructionId.IrInstructionIdBitReverse: 'IrInstructionBitReverse',
IrInstructionId.IrInstructionIdErrSetCast: 'IrInstructionErrSetCast',
IrInstructionId.IrInstructionIdToBytes: 'IrInstructionToBytes',
IrInstructionId.IrInstructionIdFromBytes: 'IrInstructionFromBytes',
IrInstructionId.IrInstructionIdCheckRuntimeScope: 'IrInstructionCheckRuntimeScope',
IrInstructionId.IrInstructionIdVectorToArray: 'IrInstructionVectorToArray',
IrInstructionId.IrInstructionIdArrayToVector: 'IrInstructionArrayToVector',
}
type_name = variants.get(id)
if not type_name:
return None
casted_type = gdb.lookup_type(type_name)
return inst.address.reinterpret_cast(casted_type.pointer())
def ast_node_variant(node):
variants = {
NodeType.NodeTypeFnDef: 'fn_def',
NodeType.NodeTypeFnProto: 'fn_proto',
NodeType.NodeTypeParamDecl: 'param_decl',
NodeType.NodeTypeBlock: 'block',
NodeType.NodeTypeGroupedExpr: 'grouped_expr',
NodeType.NodeTypeReturnExpr: 'return_expr',
NodeType.NodeTypeDefer: 'defer',
NodeType.NodeTypeVariableDeclaration: 'variable_declaration',
NodeType.NodeTypeTestDecl: 'test_decl',
NodeType.NodeTypeBinOpExpr: 'bin_op_expr',
NodeType.NodeTypeUnwrapErrorExpr: 'unwrap_err_expr',
NodeType.NodeTypeUnwrapOptional: 'unwrap_optional',
NodeType.NodeTypePrefixOpExpr: 'prefix_op_expr',
NodeType.NodeTypePointerType: 'pointer_type',
NodeType.NodeTypeFnCallExpr: 'fn_call_expr',
NodeType.NodeTypeArrayAccessExpr: 'array_access_expr',
NodeType.NodeTypeSliceExpr: 'slice_expr',
NodeType.NodeTypeUse: 'use',
NodeType.NodeTypeIfBoolExpr: 'if_bool_expr',
NodeType.NodeTypeIfErrorExpr: 'if_err_expr',
NodeType.NodeTypeIfOptional: 'test_expr',
NodeType.NodeTypeWhileExpr: 'while_expr',
NodeType.NodeTypeForExpr: 'for_expr',
NodeType.NodeTypeSwitchExpr: 'switch_expr',
NodeType.NodeTypeSwitchProng: 'switch_prong',
NodeType.NodeTypeSwitchRange: 'switch_range',
NodeType.NodeTypeCompTime: 'comptime_expr',
NodeType.NodeTypeAsmExpr: 'asm_expr',
NodeType.NodeTypeFieldAccessExpr: 'field_access_expr',
NodeType.NodeTypePtrDeref: 'ptr_deref_expr',
NodeType.NodeTypeContainerDecl: 'container_decl',
NodeType.NodeTypeStructField: 'struct_field',
NodeType.NodeTypeStringLiteral: 'string_literal',
NodeType.NodeTypeCharLiteral: 'char_literal',
NodeType.NodeTypeFloatLiteral: 'float_literal',
NodeType.NodeTypeIntLiteral: 'int_literal',
NodeType.NodeTypeContainerInitExpr: 'container_init_expr',
NodeType.NodeTypeStructValueField: 'struct_val_field',
NodeType.NodeTypeNullLiteral: 'null_literal',
NodeType.NodeTypeUndefinedLiteral: 'undefined_literal',
NodeType.NodeTypeSymbol: 'symbol_expr',
NodeType.NodeTypeBoolLiteral: 'bool_literal',
NodeType.NodeTypeBreak: 'break_expr',
NodeType.NodeTypeContinue: 'continue_expr',
NodeType.NodeTypeUnreachable: 'unreachable_expr',
NodeType.NodeTypeArrayType: 'array_type',
NodeType.NodeTypeErrorType: 'error_type',
NodeType.NodeTypeErrorSetDecl: 'err_set_decl',
NodeType.NodeTypeCancel: 'cancel_expr',
NodeType.NodeTypeResume: 'resume_expr',
NodeType.NodeTypeAwaitExpr: 'await_expr',
NodeType.NodeTypeSuspend: 'suspend',
NodeType.NodeTypePromiseType: 'promise_type',
}
type = NodeType(node['type'])
return variants.get(type)