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Manipulating Processes and Threads Figure 152: Control and Share Groups Example Process Groups Process Names Relationship Control Group 1 Control Group 2 Share Group 1 Share Group 2 Share Group 3 Placing Processes in Groups filter filter.1 filter.2 filter.1.1 generate TotalView uses your executable’s name to determine the share group that the program belongs to. If the path names are identical, TotalView assumes that they are the same program. If the path names differ, TotalView assumes that they are different, even if the file name in the path name is the same, and places them in different share groups. Starting Processes and Threads To start a process, select a Go command from the Group, Process, or Thread pulldown menus. After you select a Go command, TotalView decides what to run based on the current thread. It uses this thread, which is called the Thread of Interest (TOI), to decide what other threads it should run. For example, if you select Group > Go, TotalView continues all threads in the current group that are associated with this thread. CLI: dfocus g dgo Abbreviation: G The commands you will use most often are Group > Go and Process > Go. The Group > Go command creates and starts the current process and all other processes in the multi-process program. There are some limitations, however. TotalView only resumes a process if the following are true: � The process is not being held. � The process is already exists and is stopped. � The process is at a breakpoint. parent process #1 child process #1 child process #2 grandchild process #1 parent process #2 Using a Group > Go command on a process that’s already running starts the other members of the process’s control group. CLI: dgo If the process hasn’t yet been created, Go commands creates and starts it. Starting a process means that all threads in the process resume executing unless you are individually holding a thread. 236 Chapter 12: Debugging Programs
Manipulating Processes and Threads TotalView disables the Thread > Go command if asynchronous thread control is not available. If you enter a thread-level command in the CLI when asynchronous thread controls aren’t available, TotalView tries to perform an equivalent action. For example, it continues a process instead of a thread. For a single-process program, the Process > Go and Group > Go commands are equivalent. For a single-threaded process, the Process > Go and Thread > Go commands are equivalent. Creating a Process Without Starting It The Process > Create command creates a process and stops it before the first statement in your program executes. If you link a program with shared libraries, TotalView allows the dynamic loader to map into these libraries. Creating a process without starting it is useful when you need to do the following: � Create watchpoints or change the values of global variables after a process is created, but before it runs. � Debug C++ static constructor code. CLI: dstepi While there is no CLI equivalent to the Process > Create command, executing the dstepi command produces the same effect. Creating a Process by Single-Stepping The TotalView single-stepping commands lets you create a process and run it to the beginning of your programs. The single-stepping commands available from the Process menu are as shown in the following table: GUI command CLI command Creates the process and ... Process > Step dfocus p dstep Runs it to the first line of the main() routine. Process > Next dfocus p dnext Runs it to the first line of the main() routine; this is the same as Process > Step. Process > Step Instruction Process > Next Instruction dfocus p dstepi Stops it before any of your program executes. dfocus p dnexti Runs it to the first line of the main() routine. This is the same as Process > Step. If a group-level or thread-level stepping command creates a process, the behavior is the same as if it were a process-level command. Chapter 13, “Using Groups, Processes, and Threads,” on page 251 contains a detailed discussion of setting the focus for stepping commands. Stepping and Setting Breakpoints Several of the single-stepping commands require that you select a source line or machine instruction in the Source Pane. To select a source line, place the cursor over the line and click your left mouse button. If you select TotalView Users Guide: version 8.7 237
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TotalView Users Guide version 8.7
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Book Overview part I - Introduction
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Contents About This Book TotalView
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Setting Preferences, Options, and X
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Installation Notes ................
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Starting Processes and Threads ....
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Displaying Allocated Arrays........
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Using Built-In Statements .........
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Figures Chapter 1: Getting Started
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Figure 76. File > Preferences: Bulk
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Chapter 13: Using Groups, Processes
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About This Book This book describes
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How to Use This Book The informatio
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Conventions and what you should cli
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Contacting Us Contacting Us Please
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Part I: Introduction This part of t
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Getting Started Figure 1: The Proce
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Getting Started Figure 3: Setting C
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Getting Started Figure 5: Diving on
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Debugging Multi-process and Multi-t
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Using Groups and Barriers Figure 10
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Introducing the CLI Introducing the
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A Couple of Processes Figure 14: A
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Threads Figure 18: Threads Threads
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Types of Threads Figure 20: Four Pr
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Organizing Chaos Figure 23: User, S
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Organizing Chaos Figure 25: Five Pr
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Creating Groups Figure 27: Step 1:
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Creating Groups Figure 30: Step 5:
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Simplifying What You’re Debugging
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Simplifying What You’re Debugging
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c h a p t e r Getting Started with
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Figure 36: Remote Display Client Se
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Figure 38: Asking for Password Usin
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Using Remote Display You can, of co
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Figure 42: Local Data in a Stack Fr
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Figure 43: Access By Options Remote
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Figure 44: Remote Host Information
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Figure 47: Saving a Profile Figure
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c h a p t e r Setting Up a Debuggin
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Starting TotalView customer_compili
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Starting TotalView If you type an e
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Starting TotalView Before Version 6
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Figure 53: Start a New Process Load
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Figure 55: Open a Core File Start a
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Figure 57: Thread > Continuation Si
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Figure 59: Setting Command-Line Opt
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Figure 61: Root Window Showing Proc
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Handling Signals Thread > Continuat
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Setting Search Paths Make your chan
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Figure 65: Select Directory Dialog
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Figure 66: File > Preferences Dialo
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Setting Preferences Dynamic Librari
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Setting Preferences Pointer Dive Th
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Setting Preferences Similarly, docu
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c h a p t e r 5 Setting Up Remote D
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Figure 75: File > Preferences: Laun
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Figure 76: File > Preferences: Bulk
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Figure 77: Manual Launching of Debu
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Starting the TotalView Server Manua
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Disabling Autolaunch Setting Bulk S
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Figure 78: Launching tvdsvr Disabli
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Figure 80: Debugging Session Over a
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c h a p t e r 6 Setting Up MPI Debu
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Figure 82: File > New Program Dialo
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Debugging MPICH Applications The MP
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Debugging MPICH Applications 4 Afte
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Starting MPI Issues Starting TotalV
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Figure 86: Tools > Message Queue Gr
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Displaying the Message Queue play i
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Figure 90: Message Queue Window Sho
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Debugging HP MPI Applications This
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Debugging IBM MPI Parallel Environm
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Debugging IBM MPI Parallel Environm
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Debugging LAM/MPI Applications the
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Debugging SiCortex MPI Applications
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Debugging Sun MPI Applications mapp
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Figure 91: Group > Attach Subset Di
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Debugging Parallel Applications Tip
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Debugging Parallel Applications Tip
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c h a p t e r 7 Setting Up Parallel
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Debugging OpenMP Applications � T
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Figure 95: OpenMP Shared Variable T
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Figure 96: OpenMP THREADPRIVATE Com
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Figure 98: Cell Architecture PPE PP
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Figure 100: Root Window for a Cell
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Figure 103: Register Union Debuggin
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Debugging Cray XT Applications For
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Debugging SiCortex Applications Her
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Debugging Global Arrays Application
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Debugging PVM (Parallel Virtual Mac
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Debugging PVM (Parallel Virtual Mac
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Figure 106: PVM Tasks and Configura
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Figure 107: SHMEM Sample Session
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Figure 108: A Sliced UPC Array Figu
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Figure 111: Pointer to a Shared Var
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Part III: Using the GUI The two cha
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c h a p t e r Using TotalView Windo
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Figure 112: Root Window Figure 113:
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Figure 115: Sorted and Aggregated R
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Figure 117: Line Numbers with Stop
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Figure 119: Assembly Only (Symbolic
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Figure 122: Backward and Forward Bu
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Figure 124: File > Save Pane Dialog
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c h a p t e r 9 Visualizing Program
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Command Summary Visualizing Array D
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Figure 127: A Three- Dimensional Ar
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Page 229 and 230: Part IV: Using the CLI The chapters
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Page 233 and 234: Using the CLI Interface Starting th
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Page 237 and 238: About CLI Output About CLI Output A
Page 239 and 240: Using Namespaces Using Namespaces C
Page 241 and 242: How Parallelism Affects Behavior Ho
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Page 247 and 248: Initializing an Array Slice Initial
Page 249 and 250: Writing an Array Variable to a File
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Page 253 and 254: Part V: Debugging The chapters in t
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Page 257 and 258: Figure 141: View > Lookup Variable
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Page 261 and 262: Manipulating Processes and Threads
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Page 265 and 266: Why breakpoints don’t work (part
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Page 285 and 286: Stepping (Part I) � Set breakpoin
Page 287 and 288: Understanding Thread Width Stepping
Page 289 and 290: Understanding Process/Thread Sets S
Page 291 and 292: Specifying Arenas Setting Process a
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Page 295 and 296: Setting Group Focus � Lockstep Gr
Page 297 and 298: Specifier Specifies Setting Group F
Page 299 and 300: ‘All’ Does Not Always Mean ‘A
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Page 305 and 306: Naming Lists with Inconsistent Widt
Page 307 and 308: Using P/T Set Operators Using P/T S
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Figure 173: Variable Window Showing
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Displaying Variables Scoping Issues
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Figure 177: Program Browser and Var
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Figure 179: Diving on Local Variabl
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Figure 181: View > Examine Format >
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Figure 184: Variable Window with Ma
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Figure 185: Undive/Redive Buttons F
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Figure 188: Displaying C Structures
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Figure 190: The Tools > Expression
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Figure 193: Expression List Window
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Figure 197: Using Functions in the
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Viewing a List of Variables (or sel
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Figure 199: Using an Expression to
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Figure 200: Three Casts Changing a
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Changing a Variable’s Data Type W
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Changing a Variable’s Data Type T
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Figure 202: Displaying wchar_t Data
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Changing the Address of Variables D
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Figure 204: Displaying C++ Classes
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Figure 205: Diving on a Common Bloc
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Figure 207: Fortran 90 User- Define
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Displaying Thread Objects that has
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Figure 210: Variable Window: Showin
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c h a p t e r Examining Arrays 15 T
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Examining and Analyzing Arrays This
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Figure 213: An Array Slice and an A
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Figure 214: Array Data Filtering by
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Figure 216: Array Data Filtering by
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Figure 218: Array Statistics Window
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Figure 219: Viewing Across Threads
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Visualizing Array Data Visualizing
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c h a p t e r 16 Setting Action Poi
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Figure 222: Action Point Tab Settin
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Figure 224: Setting Breakpoints on
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Figure 227: Ambiguous Function Dial
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Figure 229: Action Point > At Locat
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Figure 232: PC Arrow Over a Stop Ic
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Setting Breakpoints and Barriers at
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Setting Breakpoints and Barriers Ab
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Setting Breakpoints and Barriers Wh
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Defining Eval Points and Conditiona
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Defining Eval Points and Conditiona
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Figure 236: Stopped Execution of Co
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Using Watchpoints Platform Assemble
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Using Watchpoints Computer Constrai
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Watching Memory Using Watchpoints A
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The following is an expression that
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c h a p t e r Evaluating Expression
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Why is There an Expression System?
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Figure 240: Expression List Window:
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Using Programming Language Elements
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Using the Evaluate Window Using the
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Figure 244: Evaluating Information
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Using the Evaluate Window Pseudo Op
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Using Built-in Variables and Statem
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Glossary ACTION POINT: A debugger f
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off the function reference to an ev
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DOPE VECTOR: This is a run time des
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INITIALIZATION FILE: An optional fi
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PARCEL: The number of bytes require
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threads. There are two kinds of ser
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SYMBOL NAME: The name associated wi
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Index Symbols # scope separator cha
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array structure viewing limitations
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context 138 description 140 empty c
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Tools > Watchpoint 10, 378 totalvie
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into a stack frame 174 into a struc
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-file command-line option to Visual
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see alsoshared libraries limitation
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expressions 275 set of arenas 259 s
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PVM groups, unrelated to process gr
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stride elements 334 UPC 158 upper b
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threads model 18 threads tab 230 th
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View > Compilation Scope commands 2
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