TNS/R Native Application Migration Guide

Contents

TNS/R Native Application Migration Guide—523745-001

1. Introduction to Native Mode (continued)

Native Architecture Features 1-10

Native Process Environment 1-10

Native Object File Format 1-13

Signals Facility 1-13

Shared Run-Time Libraries (SRLs) 1-14

Kernel-Managed Swap Facility (KMSF) 1-16

Benefits of Native Mode 1-18

Constraints of Native Mode 1-19

2. Developing a Migration Strategy

Determining Which Programs to Migrate 2-1

Preparing Programs for Migration 2-2

Planning System Resources 2-2

Maintaining Common Source Code for TNS and Native Compilers 2-3

Determining Optimization Levels 2-4

Determining Data Alignment 2-5

Tuning the Performance of Native Programs 2-6

Detecting Compatibility Traps 2-6

Eliminating Compatibility Traps 2-7

3. C and C++ Migration Tasks

Using the Native C and C++ Migration Tool 3-2

Running NMCMT in the Guardian Environment 3-2

Running nmcmt in the OSS Environment 3-4

Using the Native C and C++ Compilers 3-5

Converting Code to Use 32-Bit Pointers and Integers

3-6

Replacing Obsolete External Function Declarations

3-7

Replacing Obsolete Keywords 3-8

Changing Use of _cc_status for Return Values 3-8

Replacing Calls to Obsolete C Library Supplementary Functions 3-9

Replacing Calls to Obsolete C Library Guardian Alternate-Model I/O Functions 3-11

Checking Calls to Changed C Library Functions 3-13

Changing Programs That Use Guardian and OSS Environment Interoperability 3-14

Changing Code That Relies on Arithmetic Overflow Traps 3-15

Using Active Backup Programming in C 3-16

Replacing Obsolete C++ Library Operations 3-16

Using the Tools.h++ Class Library 3-16

Specifying Pragmas or Flags 3-17