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Overview
Comment:Fix a case in live-recovery from a writer crash.
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Timelines: family | ancestors | descendants | both | range-delete
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SHA1: 80abdbea2d23287b5d28e8784d7a3801e9418d7e
User & Date: dan 2012-10-15 19:34:24.599
Context
2012-10-15
19:36
Merge range-delete branch back into trunk. check-in: a7de625f13 user: dan tags: trunk
19:34
Fix a case in live-recovery from a writer crash. Leaf check-in: 80abdbea2d user: dan tags: range-delete
16:42
Fix an assert() that can fail following an OOM condition. check-in: 8a713f17fc user: dan tags: range-delete
Changes
Side-by-Side Diff Ignore Whitespace Patch
Changes to lsm-test/lsmtest8.c.
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}

void do_writer_crash_test(const char *zPattern, int *pRc){
  struct Test {
    const char *zName;
    void (*xFunc)(int *);
  } aTest[] = {
    { "writercrash2.lsm", doWriterCrash2 },
    { "writercrash1.lsm", doWriterCrash1 },
    { "writercrash2.lsm", doWriterCrash2 },
  };
  int i;
  for(i=0; i<ArraySize(aTest); i++){
    struct Test *p = &aTest[i];
    if( testCaseBegin(pRc, zPattern, p->zName) ){
      p->xFunc(pRc);
      testCaseFinish(*pRc);
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Changes to src/lsm_tree.c.
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  u32 iShmid;
  ShmChunk *p;

  p = treeShmChunkRc(db, db->treehdr.iFirst, &rc);
  iShmid = p->iShmid;
  while( rc==LSM_OK && p ){
    if( p->iNext ){
      if( p->iNext>=db->treehdr.nChunk ){
        rc = LSM_CORRUPT_BKPT;
      }else{
      ShmChunk *pNext = treeShmChunkRc(db, p->iNext, &rc);
      if( rc==LSM_OK ){
        if( pNext->iShmid!=p->iShmid+1 ){
          rc = LSM_CORRUPT_BKPT;
        }
        p = pNext;
        ShmChunk *pNext = treeShmChunkRc(db, p->iNext, &rc);
        if( rc==LSM_OK ){
          if( pNext->iShmid!=p->iShmid+1 ){
            rc = LSM_CORRUPT_BKPT;
          }
          p = pNext;
        }
      }
    }else{
      p = 0;
    }
    nVisit++;
  }
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    nSort = 1;
    while( nSort < (db->treehdr.nChunk-1) ) nSort = nSort * 2;
    nByte = sizeof(ShmChunkLoc) * nSort * 2;
    aSort = lsmMallocZeroRc(db->pEnv, nByte, &rc);
    iPrevShmid = pMin->iShmid;

    /* Fix all shm-ids, if required. */
    if( rc==LSM_OK && iMin!=db->treehdr.iFirst ){
    if( rc==LSM_OK ){
      iPrevShmid = pMin->iShmid-1;
      for(i=1; i<db->treehdr.nChunk; i++){
        p = treeShmChunk(db, i);
        aSort[i-1].pShm = p;
        aSort[i-1].iLoc = i;
        if( i!=db->treehdr.iFirst ){
          if( shm_sequence_ge(p->iShmid, db->treehdr.iNextShmid) ){
            p->iShmid = iPrevShmid--;
          }
        }
      }
      if( iMin!=db->treehdr.iFirst ){
      p = treeShmChunk(db, db->treehdr.iFirst);
      p->iShmid = iPrevShmid;
        p = treeShmChunk(db, db->treehdr.iFirst);
        p->iShmid = iPrevShmid;
      }
    }

    if( rc==LSM_OK ){
      ShmChunkLoc *aSpace = &aSort[nSort];
      for(i=0; i<nSort; i++){
        if( aSort[i].pShm ){
          assert( shm_sequence_ge(aSort[i].pShm->iShmid, iPrevShmid) );
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