diff options
Diffstat (limited to 'src/H5FDint.c')
| -rw-r--r-- | src/H5FDint.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/H5FDint.c b/src/H5FDint.c index cd48197..744c3d1 100644 --- a/src/H5FDint.c +++ b/src/H5FDint.c @@ -207,9 +207,16 @@ H5P_genplist_t *dxpl, H5FD_mem_t type, haddr_t addr, if(HADDR_UNDEF == (eoa = (file->cls->get_eoa)(file, type))) HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver get_eoa request failed") - if((addr + file->base_addr + size) > eoa) - HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size=%llu, eoa=%llu", - (unsigned long long)(addr+ file->base_addr), (unsigned long long)size, (unsigned long long)eoa) + + /* + * If the file is open for SWMR read access, allow access to data past + * the end of the allocated space (the 'eoa'). This is done because the + * eoa stored in the file's superblock might be out of sync with the + * objects being written within the file by the application performing + * SWMR write operations. + */ + if(!(file->access_flags & H5F_ACC_SWMR_READ) && ((addr + file->base_addr + size) > eoa)) + HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu, eoa = %llu", (unsigned long long)(addr + file->base_addr), (unsigned long long)size, (unsigned long long)eoa) /* Dispatch to driver */ if((file->cls->read)(file, type, H5P_PLIST_ID(dxpl), addr + file->base_addr, size, buf) < 0) |