Debugging with GDB (February 2008)
Table Of Contents
- Summary of GDB
- A Sample GDB Session
- Getting In and Out of GDB
- GDB Commands
- Running Programs Under GDB
- Stopping and Continuing
- Examining the Stack
- Examining Source Files
- Examining Data
- Using GDB with Different Languages
- Examining the Symbol Table
- Altering Execution
- GDB Files
- Specifying a Debugging Target
- HP-UX Configuration-Specific Information
- Summary of HP Enhancements to GDB
- HP-UX dependencies
- Supported Platforms and Modes
- HP-UX targets
- Support for Alternate root
- Specifying object file directories
- Fix and continue debugging
- Inline Support
- Debugging Macros
- Debugging Memory Problems
- When to suspect a memory leak
- Memory debugging restrictions
- Memory Debugging Methodologies
- Debugging Memory in Interactive Mode
- Debugging Memory in Batch Mode
- Debugging Memory Interactively After Attaching to a Running Process
- Configuring memory debugging settings
- Scenarios in memory debugging
- Stop when freeing unallocated or deallocated blocks
- Stop when freeing a block if bad writes occurred outside block boundary
- Stop when a specified block address is allocated or deallocated
- Scramble previous memory contents at malloc/free calls
- Detect dangling pointers and dangling blocks
- Detect in-block corruption of freed blocks
- Specify the amount of guard bytes for every block of allocated memory
- Comparison of Memory Debugging Commands in Interactive Mode and Batch Mode
- Heap Profiling
- Memory Checking Analysis for User Defined Memory Management Routines
- Commands to track the change in data segment value
- Thread Debugging Support
- Debugging MPI Programs
- Debugging multiple processes ( programs with fork and vfork calls)
- Debugging Core Files
- Printing the Execution Path Entries for the Current Frame or Thread
- Invoking GDB Before a Program Aborts
- Aborting a Command Line Call
- Instruction Level Stepping
- Enhanced support for watchpoints and breakpoints
- Debugging support for shared libraries
- Language support
- Enhanced Java Debugging Support
- Commands for Examining Java Virtual Machine(JVM) internals
- Support for stack traces in Java, C, and C++ programs
- Support for 64-bit Java, C, aC++ stack unwinding
- Enhanced support for C++ templates
- Support for __fpreg data type on IPF
- Support for _Complex variables in HP C
- Support for debugging namespaces
- Command for evaluating the address of an expression
- Viewing Wide Character Strings
- Support for output logging
- Getting information from a non-debug executable
- Debugging optimized code
- Visual Interface for WDB
- Starting and stopping Visual Interface for WDB
- Navigating the Visual Interface for WDB display
- Specifying foreground and background colors
- Using the X-window graphical interface
- Using the TUI mode
- Changing the size of the source or debugger pane
- Using commands to browse through source files
- Loading source files
- Editing source files
- Editing the command line and command-line history
- Saving the contents of a debugging session to a file
- Support for ddd
- Support for XDB commands
- GNU GDB Logging Commands
- Support for command line calls in a stripped executable
- Displaying the current block scope information
- Linux support
- The HP-UX Terminal User Interface
- XDB to WDB Transition Guide
- By-function lists of XDB commands and HP WDB equivalents
- Overall breakpoint commands
- XDB data formats and HP WDB equivalents
- XDB location syntax and HP WDB equivalents
- XDB special language operators and HP WDB equivalents
- XDB special variables and HP WDB equivalents
- XDB variable identifiers and HP WDB equivalents
- Alphabetical lists of XDB commands and HP WDB equivalents
- Controlling GDB
- Canned Sequences of Commands
- Using GDB under gnu Emacs
- GDB Annotations
- The gdb/mi Interface
- Function and purpose
- Notation and terminology
- gdb/mi Command Syntax
- gdb/mi compatibility with CLI
- gdb/mi output records
- gdb/mi command description format
- gdb/mi breakpoint table commands
- gdb/mi Data manipulation
- gdb/mi program control
- Miscellaneous GDB commands in gdb/mi
- gdb/mi Stack Manipulation Commands
- gdb/mi Symbol query commands
- gdb/mi Target Manipulation Commands
- gdb/mi thread commands
- gdb/mi tracepoint commands
- gdb/mi variable objects
- Reporting Bugs in GDB
- Installing GDB
- Index
iv Debugging with GDB
14 HP-UX Configuration-Specific Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
14.1 Summary of HP Enhancements to GDB . . . . . . . . . . . . . . . 113
14.2 HP-UX dependencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
14.2.1 Linker Dependencies . . . . . . . . . . . . . . . . . . . . . . . . . 116
14.2.2 Dependent Standard Library Routines for Run
Time Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
14.3 Supported Platforms and Modes . . . . . . . . . . . . . . . . . . . . . . 117
14.4 HP-UX targets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
14.5 Support for Alternate root . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
14.6 Specifying object file directories . . . . . . . . . . . . . . . . . . . . . . . 119
14.7 Fix and continue debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
14.7.1 Fix and Continue compiler dependencies . . . . . . 121
14.7.2 Fix and Continue restrictions . . . . . . . . . . . . . . . . . 121
14.7.3 Using Fix and Continue . . . . . . . . . . . . . . . . . . . . . . 122
14.7.4 Example Fix and Continue session . . . . . . . . . . . . 122
14.8 Inline Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
14.8.1 Inline Debugging in HP 9000 Systems . . . . . . . . . 125
14.8.2 Inline Debugging in Integrity Systems . . . . . . . . . 125
14.8.2.1 Debugging Inline Functions in Integrity
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
14.9 Debugging Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
14.9.1 Viewing and Evaluating Macro Definitions. . . . . 128
14.9.1.1 Compiler Options to Enable Macro
Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
14.9.2 Examples for Macro Debugging . . . . . . . . . . . . . . . 129
14.10 Debugging Memory Problems . . . . . . . . . . . . . . . . . . . . . . . . 133
14.10.1 When to suspect a memory leak . . . . . . . . . . . . . 133
14.10.2 Memory debugging restrictions . . . . . . . . . . . . . . 133
14.10.3 Memory Debugging Methodologies . . . . . . . . . . . 133
14.10.4 Debugging Memory in Interactive Mode . . . . . . 134
14.10.4.1 Commands for interactive memory
debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
14.10.4.2 Example for interactive debugging session
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
14.10.5 Debugging Memory in Batch Mode . . . . . . . . . . 138
14.10.5.1 Setting Configuration Options for Batch
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
14.10.5.2 Environment variable setting for Batch
mode debugging . . . . . . . . . . . . . . . . . . . . . . . . . 141
14.10.5.3 Example for Batch Mode RTC . . . . . . 142
14.10.6 Debugging Memory Interactively After Attaching
to a Running Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
14.10.7 Configuring memory debugging settings . . . . . . 145
14.10.7.1 Specifying the stack depth . . . . . . . . . . 146
14.10.7.2 Specifying minimum leak size . . . . . . . 146
14.10.7.3 Specifying minimum block size . . . . . . 146
14.10.8 Scenarios in memory debugging. . . . . . . . . . . . . . 147