| ... | ... | @@ -213,25 +213,34 @@ fn alignmentAssumptionHandler( |
| 213 | 213 | alignment: ValueHandle, |
| 214 | 214 | maybe_offset: ?ValueHandle, |
| 215 | 215 | ) callconv(.c) noreturn { |
| 216 | | _ = pointer; |
| 217 | | // TODO: add the hint here? |
| 218 | | // const real_pointer = @intFromPtr(pointer) - @intFromPtr(maybe_offset); |
| 219 | | // const lsb = @ctz(real_pointer); |
| 220 | | // const actual_alignment = @as(u64, 1) << @intCast(lsb); |
| 221 | | // const mask = @intFromPtr(alignment) - 1; |
| 222 | | // const misalignment_offset = real_pointer & mask; |
| 223 | | // _ = actual_alignment; |
| 224 | | // _ = misalignment_offset; |
| 216 | const real_pointer = @intFromPtr(pointer) - @intFromPtr(maybe_offset); |
| 217 | const lsb = @ctz(real_pointer); |
| 218 | const actual_alignment = @as(u64, 1) << @intCast(lsb); |
| 219 | const mask = @intFromPtr(alignment) - 1; |
| 220 | const misalignment_offset = real_pointer & mask; |
| 225 | 221 | |
| 226 | 222 | if (maybe_offset) |offset| { |
| 227 | 223 | logMessage( |
| 228 | | "assumption of {} byte alignment (with offset of {} byte) for pointer of type {s} failed", |
| 229 | | .{ alignment.getValue(data), @intFromPtr(offset), data.type_descriptor.getName() }, |
| 224 | "assumption of {} byte alignment (with offset of {} byte) for pointer of type {s} failed\n" ++ |
| 225 | "offset address is {} aligned, misalignment offset is {} bytes", |
| 226 | .{ |
| 227 | alignment.getValue(data), |
| 228 | @intFromPtr(offset), |
| 229 | data.type_descriptor.getName(), |
| 230 | actual_alignment, |
| 231 | misalignment_offset, |
| 232 | }, |
| 230 | 233 | ); |
| 231 | 234 | } else { |
| 232 | 235 | logMessage( |
| 233 | | "assumption of {} byte alignment for pointer of type {s} failed", |
| 234 | | .{ alignment.getValue(data), data.type_descriptor.getName() }, |
| 236 | "assumption of {} byte alignment for pointer of type {s} failed\n" ++ |
| 237 | "address is {} aligned, misalignment offset is {} bytes", |
| 238 | .{ |
| 239 | alignment.getValue(data), |
| 240 | data.type_descriptor.getName(), |
| 241 | actual_alignment, |
| 242 | misalignment_offset, |
| 243 | }, |
| 235 | 244 | ); |
| 236 | 245 | } |
| 237 | 246 | } |
| ... | ... | @@ -309,7 +318,26 @@ fn pointerOverflow( |
| 309 | 318 | .{base}, |
| 310 | 319 | ); |
| 311 | 320 | } else { |
| 312 | | @panic("TODO"); |
| 321 | const signed_base: isize = @bitCast(base); |
| 322 | const signed_result: isize = @bitCast(result); |
| 323 | if ((signed_base >= 0) == (signed_result >= 0)) { |
| 324 | if (base > result) { |
| 325 | logMessage( |
| 326 | "addition of unsigned offset to 0x{x} overflowed to 0x{x}", |
| 327 | .{ base, result }, |
| 328 | ); |
| 329 | } else { |
| 330 | logMessage( |
| 331 | "subtraction of unsigned offset to 0x{x} overflowed to 0x{x}", |
| 332 | .{ base, result }, |
| 333 | ); |
| 334 | } |
| 335 | } else { |
| 336 | logMessage( |
| 337 | "pointer index expression with base 0x{x} overflowed to 0x{x}", |
| 338 | .{ base, result }, |
| 339 | ); |
| 340 | } |
| 313 | 341 | } |
| 314 | 342 | } |
| 315 | 343 | } |
David Rubin <david@vortan.dev> 2024-12-26 03:59:27-08:00
lib