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  1. JDK
  2. JDK-8268296

ScopedMemoryAccess build error with readonly filesystems

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 17
    • None
    • core-libs
    • None
    • b26

    Description

      When building the JDK with the sources in a readonly filesystem, generation of ScopedMemoryAccess.java fails:

      ```
      Exception in thread "main" java.io.FileNotFoundException: build/support/gensrc/java.base/jdk/internal/misc/ScopedMemoryAccess.java (Permission denied)
              at java.base/java.io.FileOutputStream.open0(Native Method)
              at java.base/java.io.FileOutputStream.open(FileOutputStream.java:293)
              at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:235)
              at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:155)
              at build.tools.spp.Spp.main(Spp.java:103)
      make[3]: *** [build/support/gensrc/java.base/jdk/internal/misc/ScopedMemoryAccess.java] Error 1
      ```

      The logic that generates that file starts by copying a template, and then appending to the copied file:

      https://github.com/openjdk/jdk/blob/52d88ee1d1e0f6b9927db03a2b0bff75e4be03a2/make/modules/java.base/gensrc/GensrcScopedMemoryAccess.gmk#L145

      A potential trivial fix is just to use cat instead of cp:

      - $(CP) $(SCOPED_MEMORY_ACCESS_TEMPLATE) $(SCOPED_MEMORY_ACCESS_DEST)
      + $(CAT) $(SCOPED_MEMORY_ACCESS_TEMPLATE) > $(SCOPED_MEMORY_ACCESS_DEST)

      The readonly filesystem bit here is unusual and presumably not going to be a common problem, but this is the only instance of this problem in the build and is trivial to fix.

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              cushon Liam Miller-Cushon
              cushon Liam Miller-Cushon
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                Updated:
                Resolved: