On Tue, 30 Apr 2024 18:18:30 GMT, Paul Sandoz <[email protected]> wrote:
>> Class files with specifically corrupted tableswitch or lookupswitch
>> instructions in the bytecode cause OutOfMemoryError while parsing with
>> Class-File API.
>> This patch performs additional checks to avoid OOME and adds relevant tests.
>>
>> Please review.
>>
>> Thank you,
>> Adam
>
> src/java.base/share/classes/jdk/internal/classfile/impl/AbstractInstruction.java
> line 320:
>
>> 318: int low = code.classReader.readInt(ap + 4);
>> 319: int high = code.classReader.readInt(ap + 8);
>> 320: if (high < low || high - low > code.codeLength >> 2) {
>
> May be its also an opportunity to reduce duplication e.g., replace line 316
> with a call to `afterPadding()`
`BoundTableSwitchInstruction::afterPadding()` is an instance method, and
`BoundTableSwitchInstruction::size(…)` is a static method, so this would
require further refactoring.
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PR Review Comment: https://git.openjdk.org/jdk/pull/19024#discussion_r1585700103
