Debugging with GDB (September 2007)

Chapter 14: HP-UX Configuration-Specific Information 165
• info global-exec-path summary
Prints the summary information about all the global execution path entries in the
current frame. This command displays the total number of global execution path
entries that can be stored, the number of global execution path entries in this
frame in the last iteration, and the last executed global execution path number.
• exec-path [up][down][path_index] (aliased to ep)
Enables you to select, print, and navigate through the execution path entries.
When no arguments are specified, it prints the selected execution path entry. You
can specify the argument as an execution path index from the info exec-path or
the info global-exec-path commands. Alternately, you can use the up or down
command to navigate through the execution path entries.
14.15.1 Compiler Dependencies for Printing the Execution
Path Entries
The +pathtrace compiler option provides a mechanism to record program execution
control flow into global path tables, local path tables, or b oth. This saved information
enables the debugger to print the execution path entries in the current thread or frame.
To print the execution path entries in the current thread or frame for programs running
on Integrity systems, you can set the required sub-options for the +pathtrace compiler
option.
You must set the following +pathtrace compiler option to enable the debugger to print
the execution path entries:
+pathtrace= [<global|global_fixed_size>:<local>]
For more information on this feature, see the following example.
14.15.2 Example Illustrating Execution Path Recovery
The following example illustrates the use of the execution path recovery feature in HP
WDB:
Sample Program:
$cat execpath.c
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
int a = 3, b = 0, c = 4;
if (a)
printf("Value of a greater than 0\n");
if (b)