PM17787: CRASH IN JIT_MEM_ALLOC
Closed as program error.
Error Message: Crash with SEGFAULT. Customer reports that this problem occurs when a particular method gets JIT compiled. . Stack Trace: 705C8A66 at jitc.dll _jit_mem_alloc + 0056 705C958F at jitc.dll _jit_code_mem_alloc + 001F 705FA544 at jitc.dll _create_sp_offset_info + 00F4 705CCFC8 at jitc.dll _JITGenNativeCode_state + 07C3 70499A0F at jitc.dll _JITGenNativeCode + 10EF 704722B1 at jitc.dll _jit_compiler_entry + 0C51 704735EC at jitc.dll __jit_fast_compile + 026C 706400EB at jitc.dll __gate_code + 004B . NA
Crash with SEGFAULT. Customer reports that this problem occurs when a particular method gets JIT compiled.
This defect will be fixed in: 1.4.2 SR13 FP6 . The crash occured in the code generation phase of the JIT compilation of the customer's method, which has quite many number of StringBuffer's constructor and append methods inlined into it. The codegen is a dual pass routine, in the first pass, compiler runs through the optimized bytecode and estimates the size of the native code buffer to be allocated, and in the second pass, actual code is generated into the code buffer which is allocated based on the size information obtained from pass 1. Due to an error in the size computation logic, the generated code size becomes more than the estimated size, and overflows into the memory allocation structures. Next time when an allocation request was issued, the corrupted data structures caused the crash. The issue is fixed in latest SDK.(SR13 FP6) . To obtain the fix: Install build 20100909 or later
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APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
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