Bug 3948 - testcase LinuxCoreTask getMemory()
Summary: testcase LinuxCoreTask getMemory()
Alias: None
Product: frysk
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
: P2 normal
Target Milestone: ---
Assignee: Phil Muldoon
Depends on:
Blocks: 1595 1633
  Show dependency treegraph
Reported: 2007-01-31 17:20 UTC by Phil Muldoon
Modified: 2007-10-15 09:17 UTC (History)
0 users

See Also:
Last reconfirmed:


Note You need to log in before you can comment on or make changes to this bug.
Description Phil Muldoon 2007-01-31 17:20:48 UTC
When a task.getMemory() occurs on a LinuxDeadTask, the operation will be handled
and redirected to a corefile. This requires a memory offset -> file offset
adjustment as well as dealing with endian/alignment issues.

The operation must be transparent to the abstract class Task.
Comment 1 Phil Muldoon 2007-04-16 17:19:27 UTC
Partial implementation. Still cannot access elided segments from the corefile:

2007-04-15  Phil Muldoon  <pmuldoon@redhat.com>
	* LinuxCoreFileProc.java (LinuxCorefileProc) Store backing
	corefile's name. Store a process's memorymap here.
	(getMemory): New.
	* LinuxCoreFileHost.java: Make coreFile protected.
	* LinuxCoreFileTask.java (getMemory): Ask proc for
	it's memory-maps.
	* TestLinuxCore.java (testLinuxTaskMemory): New.

2007-04-13  Phil Muldoon  <pmuldoon@redhat.com>
	* corefile/: Created.
	* TestCorefileByteBuffer.java: New.
	* CorefileByteBuffer.java: New.

Comment 2 Phil Muldoon 2007-10-15 09:17:57 UTC
Build elided maps, allow access and incorporate elided map tests.

2007-06-13  Phil Muldoon  <pmuldoon@redhat.com>

        * MapAddressHeader.java: New.
        * LinkmapBuilder.java: New.
        * SOLibMapBuilder.java: New.

        * CorefileByteBuffer.java (MapAddress): Delete. Use
        MapAddressHeader instead.
        (CorefileByteBuffer): Add a parameter to take meta data.
        Do not attempt to construct own meta data.
        Set Endian and Word size for data read from elf header.
        (CorefileByteBuffer(File)): Build own meta data.
        (peek): Rewrite. Navigate provided meta data to find the peek
        offset and the file name of that offset.
        (buildElfMaps): Rewrite using MapAddressHeader.
        (isFileSane): Simplify. Check for null on backing
        (findMetaData): New. Consolidate all meta data look-ups
        (checkCorefileAddress): New. Answer whether this data is in the
        core file, or whether the buffer has to revert to the solib.
        (convertAddresstoOffset): Use MapAddressHeader.
        (openCoreFileElf): New.
        (closeCoreFileElf): New.
        (setEndianWordSize): New. Set word and endian size for buffer
        from the core file elf header.

      * LinuxHost.java (LinuxHost): Add backing exe and core file
        (LinuxHost): New constructor that takes an exe path.

        * LinuxProc.java (LinuxProc): Add backing exe reference.
        Add metaData[] store and boolean to indicate meta data built.
        Derive executable name from corefile is unspecified.
        (getCommand): Deleted. Unused.
        (sendrecExe): Rewrite to derive exe and full path from
        (getMemory): Check if meta data is built. If not, build it.
        (sendrecMaps): Implement. Build meta data if needed, and
        refactor data into MemoryMap format.
        (constructMetaData): New.Bake either basic or rich meta
        (constructBasicMapMetaData): New. Bake basic meta data only from
        the core file.
        (constructEnhandedMapMetaData): New. Bake rich meta data from
        the basic meta data and the solibs found in the backing exe's
        (isExeProvided): New. Return whether exe backing is provided.
        (getDynamicSegmentAddress): New. Return tuple of core file
        dynamic segment address and size.
        (getExeDynamicSegmentAddress): New. Get backing exe dynamic segment's
        (getLinkmapAddress): New. Get the address of the linkmap table, as
        derived from the dynamic segment.
        (getExeEntryPoint): New. Return the  backing exe's entry point.
        (getExeInterpreterAddress): New. Return the address of the backing
        exe's interpreter.
        (getExeInterpreterName): New. Return the name of the backing
        exe's interpreter.
        (getCorefileEntryPoint): New. Return the entry point of the
        backing core file.
        (getCorefileVDSOAddress): New. Return the address of the VDSO
        segment in this corefile.
        (openElf): New. Helper function to open elf files.
        (DynamicSegmentTuple): New. Private class to hold dynamic segment
        location information.
        (Linkmap): New. Private class to hold the linkmap table

        * LinuxProcState.java (handleTaskDetachCompleted, handleDetach):
        Handle detach requests.

       * TestLinuxCore.java (testLinuxCoreFileMaps): New.
        (testLinuxCoreFileStackTrace): New.
        (giveMeAProc): New.
        (ConstructCore): New.