diff options
Diffstat (limited to 'contrib/pageinspect/gistfuncs.c')
| -rw-r--r-- | contrib/pageinspect/gistfuncs.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/contrib/pageinspect/gistfuncs.c b/contrib/pageinspect/gistfuncs.c index a31cff47fea..6bb81ffb840 100644 --- a/contrib/pageinspect/gistfuncs.c +++ b/contrib/pageinspect/gistfuncs.c @@ -55,7 +55,23 @@ gist_page_opaque_info(PG_FUNCTION_ARGS) page = get_page_from_raw(raw_page); + /* verify the special space has the expected size */ + if (PageGetSpecialSize(page) != MAXALIGN(sizeof(GISTPageOpaqueData))) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("input page is not a valid %s page", "GiST"), + errdetail("Expected special size %d, got %d.", + (int) MAXALIGN(sizeof(GISTPageOpaqueData)), + (int) PageGetSpecialSize(page)))); + opaq = (GISTPageOpaque) PageGetSpecialPointer(page); + if (opaq->gist_page_id != GIST_PAGE_ID) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("input page is not a valid %s page", "GiST"), + errdetail("Expected %08x, got %08x.", + GIST_PAGE_ID, + opaq->gist_page_id))); /* Build a tuple descriptor for our result type */ if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE) @@ -101,6 +117,7 @@ gist_page_items_bytea(PG_FUNCTION_ARGS) bytea *raw_page = PG_GETARG_BYTEA_P(0); ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; Page page; + GISTPageOpaque opaq; OffsetNumber offset; OffsetNumber maxoff = InvalidOffsetNumber; @@ -113,6 +130,24 @@ gist_page_items_bytea(PG_FUNCTION_ARGS) page = get_page_from_raw(raw_page); + /* verify the special space has the expected size */ + if (PageGetSpecialSize(page) != MAXALIGN(sizeof(GISTPageOpaqueData))) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("input page is not a valid %s page", "GiST"), + errdetail("Expected special size %d, got %d.", + (int) MAXALIGN(sizeof(GISTPageOpaqueData)), + (int) PageGetSpecialSize(page)))); + + opaq = (GISTPageOpaque) PageGetSpecialPointer(page); + if (opaq->gist_page_id != GIST_PAGE_ID) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("input page is not a valid %s page", "GiST"), + errdetail("Expected %08x, got %08x.", + GIST_PAGE_ID, + opaq->gist_page_id))); + /* Avoid bogus PageGetMaxOffsetNumber() call with deleted pages */ if (GistPageIsDeleted(page)) elog(NOTICE, "page is deleted"); |