Created attachment 1018052 [details]
patch containing fix to the issue.

Description of problem:
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Output of java profiling tool hprof is being truncated when used with argument "doe=n". This argument should define wheter output should be written over time or at end of java program.


Version-Release number of selected component (if applicable):
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This issue is probably present in all versions of Java starting from May 2007 when Sun released most of its Java source code as free software. 

I used jdk1.7.0_51 and jdk1.6.0_31

How reproducible:
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100%


Steps to Reproduce:
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There are more ways how to run hproftool, I will describe just one:

1. Set hprof argument "doe" to "n", eg.: export JAVA_TOOL_OPTIONS="-Xrunhprof:thread=y,force=n,doe=n,file=/home/my_user/my-hprof-output.txt"
2. Run some java job, eg.: java example
3. collect output, compare it to one runned with "doe=y"

Actual results:
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Output file is truncated when using argument "doe=n". Output file contains just header, relevant data is missing. File is much smaller.


Expected results:
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HPROF tool should produce same output regardless "doe" argument setting.


Additional info:
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This issue has been reported and fixed in 2003, but fix was somehow lost. Please see original bug report: http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4890063

Check for description of hprof: http://docs.oracle.com/javase/7/docs/technotes/samples/hprof.html

There is a patch for this issue in attachment.

affected file should be in: src/share/demo/jvmti/hprof/hprof_init.c