14.10.8 Scenarios in memory debugging

174

14.10.8.1 Stop when freeing unallocated or deallocated blocks

174

14.10.8.2 Stop when freeing a block if bad writes occurred outside block

 

boundary

174

14.10.8.3 Stop when a specified block address is allocated or deallocated

175

14.10.8.4 Scramble previous memory contents at malloc/free calls

175

14.10.8.5 Detect dangling pointers and dangling blocks

175

14.10.8.6 Detect in-block corruption of freed blocks

176

14.10.8.7 Specify the amount of guard bytes for every block of allocated

 

memory

176

14.10.9 Comparison of Memory Debugging Commands in Interactive Mode and

 

Batch Mode

176

14.10.10 Heap Profiling

178

14.10.10.1 Commands for heap profiling

178

14.10.10.2 info heap arena

179

14.10.10.3 info heap arena [0 12..] blocks stacks

179

14.10.10.4 info module ADDRESS

179

14.10.10.5 info heap process

179

14.10.10.6 Example for heap profiling

179

14.10.11 Memory Checking Analysis for User Defined Memory Management

 

Routines

180

14.10.12 Commands to track the change in data segment value

180

14.11 Thread Debugging Support

181

14.11.1 Support for Enabling and Disabling Specific Threads

181

14.11.2 Backtrace Support for Thread Debugging

182

14.11.3 Advanced Thread Debugging Support

182

14.11.3.1 Pre-requisites for Advanced Thread Debugging

183

14.11.3.2 Enabling and Disabling Advanced Thread Debugging Features

183

14.11.3.3 Commands to view information on pthread primitives

187

14.11.4 Debugging Threads Interactively After Attaching to a Process

187

14.11.5 Thread Debugging in Batch Mode

189

14.11.5.1 Pre-requisites for Batch mode of Thread Debugging

190

14.11.5.2 Limitations in Batch mode of thread debugging

193

14.11.6 Thread Debugging in +check Mode

193

14.11.7 Known issues with Thread Debugging for Interactive and Batch mode

194

14.12 Debugging MPI Programs

194

14.13 Debugging multiple processes ( programs with fork and vfork calls)

195

14.13.1 Ask mode for set follow-fork-mode

195

14.13.2 Serial mode for set follow-fork-mode

195

14.13.3 Support for showing unwind info

195

14.13.4 Printing CFM and PFS registers

196

14.14 Command to Search for a Pattern in the Memory Address Space

196

14.15 Debugging Core Files

200

14.15.1 Generating core files with packcore /unpackcore/getcore

200

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HP gnu source-level debugger 5992-4701 Scenarios in memory debugging, Stop when freeing unallocated or deallocated blocks