[svn-r17764] Purpose: Fix bug 1483

Description:
H5HG_load made improper assumptions about the ordering of object indices, namely
that they are in order.  Not only is this not guaranteed by the file format
spec, but this condition can be violated if id's "wrap around" which can happen
when overwriting VL data.  H5HG_load has been fixed to handle any order of
indices.  Also fixed some other bugs involving allocation of global heaps in
memory.

Tested: jam, linew, amani (h5committest)

1 files changed, 131 insertions, 0 deletions

diff --git a/test/gheap.c b/test/gheap.c
index 6dbd8a3..b2c9090 100644
--- a/test/gheap.c
+++ b/test/gheap.c
@@ -30,11 +30,27 @@
 #include "H5Iprivate.h"
 #include "H5Pprivate.h"
 
+/* Macros for printing error messages in loops.  These print up to
+ * GHEAP_REPEATED_ERR_LIM errors, and suppress the rest */
+#define GHEAP_REPEATED_ERR_LIM 20
+
+#define GHEAP_REPEATED_ERR(MSG)                                                \
+{                                                                              \
+    nerrors++;                                                                 \
+    if(nerrors <= GHEAP_REPEATED_ERR_LIM) {                                    \
+        H5_FAILED();                                                           \
+        puts(MSG);                                                             \
+        if(nerrors == GHEAP_REPEATED_ERR_LIM)                                  \
+            puts("    Suppressing further errors...");                         \
+    } /* end if */                                                             \
+} /* end GHEAP_REPEATED_ERR */
+
 const char *FILENAME[] = {
     "gheap1",
     "gheap2",
     "gheap3",
     "gheap4",
+    "gheapooo",
     NULL
 };
 
@@ -385,6 +401,120 @@ test_4 (hid_t fapl)
 
 
 /*-------------------------------------------------------------------------
+ * Function:	test_ooo_indices
+ *
+ * Purpose:	Tests that indices can be stored out of order.  This can
+ *              happen when the indices "wrap around" due to many
+ *              insertions and deletions (for example, from rewriting a
+ *              VL dataset).
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	number of errors
+ *
+ * Programmer:	Neil Fortner
+ *              Monday, October 26, 2009
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+test_ooo_indices(hid_t fapl)
+{
+    hid_t	file = -1;
+    H5F_t 	*f = NULL;
+    unsigned	i, j;
+    H5HG_t	*obj = NULL;
+    herr_t	status;
+    int		nerrors=0;
+    char	filename[1024];
+
+    TESTING("out of order indices");
+
+    if(NULL == (obj = (H5HG_t *)HDmalloc(2000 * sizeof(*obj))))
+        goto error;
+
+    /* Open a clean file */
+    h5_fixname(FILENAME[4], fapl, filename, sizeof filename);
+    if((file = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0)
+        goto error;
+    if(NULL == (f = (H5F_t *)H5I_object(file))) {
+        H5_FAILED();
+        puts("    Unable to create file");
+        goto error;
+    } /* end if */
+
+    /* Alternately insert 1000 entries and remove the previous group of 1000
+     * entries, until the indices wrap around */
+    for(i=0; i<66; i++) {
+        /* Insert 1000 entries.  The index into the obj array will alternate up
+         * and down by 1000 so the previous set of insertions is preserved and
+         * can be deleted. */
+        for(j=1000*((~i&1)); j<1000*((~i&1)+1); j++) {
+            H5Eclear2(H5E_DEFAULT);
+            status = H5HG_insert(f, H5P_DATASET_XFER_DEFAULT, sizeof(j), &j, &obj[j]);
+            if (status<0)
+                GHEAP_REPEATED_ERR("    Unable to insert object into global heap")
+
+            /* Check that the index is as expected */
+            if(obj[j].idx != ((1000 * i) + j - (1000 * ((~i & 1)))) % ((1u << 16) - 1) + 1)
+                GHEAP_REPEATED_ERR("    Unexpected global heap index");
+        } /* end for */
+
+        /* Remove the previous 1000 entries */
+        if(i>0)
+            for(j=1000*(i&1); j<1000*((i&1)+1); j++) {
+                H5Eclear2(H5E_DEFAULT);
+                status = H5HG_remove(f, H5P_DATASET_XFER_DEFAULT, &obj[j]);
+                if (status<0)
+                    GHEAP_REPEATED_ERR("    Unable to remove object from global heap");
+            } /* end for */
+    } /* end for */
+
+    /* The indices should have "wrapped around" on the last iteration */
+    HDassert(obj[534].idx == 65535);
+    HDassert(obj[535].idx == 1);
+
+    /* Reopen the file */
+    if (H5Fclose(file)<0) goto error;
+    if((file = H5Fopen(filename, H5F_ACC_RDWR, fapl)) < 0)
+        goto error;
+    if(NULL == (f = (H5F_t *)H5I_object(file))) {
+        H5_FAILED();
+        puts("    Unable to open file");
+        goto error;
+    } /* end if */
+
+    /* Read the objects to make sure the heap is still readable */
+    for(i=0; i<1000; i++) {
+        if(NULL == H5HG_read(f, H5P_DATASET_XFER_DEFAULT, &obj[i], &j, NULL))
+            goto error;
+        if(i != j) {
+            H5_FAILED();
+            puts("    Incorrect read value");
+            goto error;
+        } /* end if */
+    } /* end for */
+
+    if (H5Fclose(file)<0) goto error;
+    if (nerrors) goto error;
+    HDfree(obj);
+    obj = NULL;
+    PASSED();
+    return 0;
+
+ error:
+    H5E_BEGIN_TRY {
+	H5Fclose(file);
+    } H5E_END_TRY;
+    if(obj)
+        HDfree(obj);
+    return MAX(1, nerrors);
+} /* end test_ooo_indices */
+
+
+/*-------------------------------------------------------------------------
  * Function:	main
  *
  * Purpose:	Tests global heap.
@@ -413,6 +543,7 @@ main (void)
     nerrors += test_2(fapl);
     nerrors += test_3(fapl);
     nerrors += test_4(fapl);
+    nerrors += test_ooo_indices(fapl);
     if (nerrors) goto error;
 
     puts("All global heap tests passed.");