aot compiler halts when there exists an infinite loop in clinit()

[David Holmes]

Redirecting to hotspot-compiler-dev, please do not reply to jdk9-dev.

Thanks,
David

On 18/04/2017 11:43 AM, Yuting Chen wrote:
> If I moved the infinite loop to any other method (e.g., main), the
> class can then be compiled. I guess jaotc runs clinit when it compiles
> clinit.
>
> On Mon, Apr 17, 2017 at 6:14 PM, Yuting Chen <chenyt.cs.sjtu at gmail.com> wrote:
>> Hi, I recently met a problem: when I tried to compile a class whose
>> clinit method contains an infinite loop, the aotc waits and fails to
>> response....
>>
>> It seems that the aotc performs some static analysis before the
>> compilation, while the analysis may not stop (when an infinite loop is
>> there).
>>
>> The bytecode is shown as follows:
>>
>> public class Vector1
>>   minor version: 0
>>   major version: 52
>>   flags: ACC_PUBLIC, ACC_SUPER
>> Constant pool:
>>    #1 = Utf8               Vector1
>>    #2 = Class              #1             // Vector1
>>    #3 = Utf8               java/lang/Object
>>    #4 = Class              #3             // java/lang/Object
>>    #5 = Utf8               serialVersionUID
>>    #6 = Utf8               J
>>    #7 = Long               -2767605614048989439l
>>    #9 = Utf8               <clinit>
>>   #10 = Utf8               ()V
>>   #11 = NameAndType        #5:#6          // serialVersionUID:J
>>   #12 = Fieldref           #2.#11         // Vector1.serialVersionUID:J
>>   #13 = Utf8               main
>>   #14 = Utf8               ([Ljava/lang/String;)V
>>   #15 = Utf8               ConstantValue
>>   #16 = Utf8               Code
>>   #17 = Utf8               StackMapTable
>> {
>>   public static {};
>>     descriptor: ()V
>>     flags: ACC_PUBLIC, ACC_STATIC
>>     Code:
>>       stack=2, locals=0, args_size=0
>>          0: ldc2_w        #7                  // long -2767605614048989439l
>>          3: putstatic     #12                 // Field serialVersionUID:J
>>          6: iconst_1
>>          7: iconst_m1
>>          8: iadd
>>          9: ifge          0
>>         12: return
>>       StackMapTable: number_of_entries = 1
>>         frame_type = 0 /* same */
>>
>>   public static void main(java.lang.String[]);
>>     descriptor: ([Ljava/lang/String;)V
>>     flags: ACC_PUBLIC, ACC_STATIC
>>     Code:
>>       stack=0, locals=1, args_size=1
>>          0: return
>> }