Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8230797

ARM32-softfp: assertion in InterpreterRuntime::resolve_ldc

    Details

    • Type: Bug
    • Status: New
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 14
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • CPU:
      aarch32
    • OS:
      linux

      Description

      On 10.09.2019 13:30, christoph.goettschkes@microdoc.com wrote:

      The runtime implementation of the ldc bytecodes has an ASSERT block, which does
      some sanity checks after the constant has been resolved [1]. The checks include
      loading the cached reference of the loaded constant using the
      ConstantPool::cp_to_object_index() method. This can fail, if the type of the
      loaded constant is not a reference, but a primitive type. This can happen on
      32-bit ARM softfp, since double constants are loaded using the runtime
      implementation on that platform (see [2]). If no other constants have been
      loaded before and there are no cached references, using the
      ConstantPool::cp_to_object_index() method crashes HotSpot with a SIGSEGV.
      This is the backtrace of a slowdebug build:

      #0 0x762f8886 in Array<unsigned short>::length (this=0x0) at src/hotspot/share/oops/array.hpp:106
      #1 0x764a1e48 in Array<unsigned short>::index_of (this=0x0, x=@0x761bc9ee: 2) at src/hotspot/share/oops/array.hpp:111
      #2 0x764a1b16 in Array<unsigned short>::find (this=0x0, x=@0x761bc9ee: 2) at src/hotspot/share/oops/array.hpp:123
      #3 0x7649a7d8 in ConstantPool::cp_to_object_index (this=0x647df840, cp_index=2) at src/hotspot/share/oops/constantPool.cpp:418
      #4 0x765e53e6 in InterpreterRuntime::resolve_ldc (thread=0x76017400, bytecode=Bytecodes::_ldc2_w) at src/hotspot/share/interpreter/interpreterRuntime.cpp:205
      #5 0x73e5c804 in ?? ()

      Sample application:

      class Test {
          public static void main(String... args) {
              double x = 4.2;
          }
      }

      [1] http://hg.openjdk.java.net/jdk/jdk/file/3fee0e6b54f5/src/hotspot/share/interpreter/interpreterRuntime.cpp#l199
      [2] http://hg.openjdk.java.net/jdk/jdk/file/3fee0e6b54f5/src/hotspot/cpu/arm/templateTable_arm.cpp#l475

        Attachments

          Activity

            People

            • Assignee:
              cgo Christoph Göttschkes
              Reporter:
              bulasevich Boris Ulasevich
            • Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated: