const Value = union(enum)generic: addr_typeregval_type: struct { // Offset of DW_TAG_base_type DIE type_offset: addr_type, type_size: u8, value: addr_type, }Typed value with a maximum size of a register
const_type: struct { // Offset of DW_TAG_base_type DIE type_offset: addr_type, // Backed by the instruction stream value_bytes: []const u8, }Typed value specified directly in the instruction stream
pub fn asIntegral(self: Value) !addr_type121
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159 const Value = union(enum) {
generic: addr_type,
// Typed value with a maximum size of a register
regval_type: struct {
// Offset of DW_TAG_base_type DIE
type_offset: addr_type,
type_size: u8,
value: addr_type,
},
// Typed value specified directly in the instruction stream
const_type: struct {
// Offset of DW_TAG_base_type DIE
type_offset: addr_type,
// Backed by the instruction stream
value_bytes: []const u8,
},
pub fn asIntegral(self: Value) !addr_type {
return switch (self) {
.generic => |v| v,
// TODO: For these two prongs, look up the type and assert it's integral?
.regval_type => |regval_type| regval_type.value,
.const_type => |const_type| {
const value: u64 = switch (const_type.value_bytes.len) {
1 => mem.readInt(u8, const_type.value_bytes[0..1], native_endian),
2 => mem.readInt(u16, const_type.value_bytes[0..2], native_endian),
4 => mem.readInt(u32, const_type.value_bytes[0..4], native_endian),
8 => mem.readInt(u64, const_type.value_bytes[0..8], native_endian),
else => return error.InvalidIntegralTypeSize,
};
return std.math.cast(addr_type, value) orelse error.TruncatedIntegralType;
},
};
}
}