Debugger thread monitor

A method of monitoring execution of a program on a computer system comprising:

• executing a portion of the program, the program including a plurality of threads;
• and
• monitoring the threads that are executing within a selected monitored region in the program while the portion of the program is executing, wherein the selected monitored region includes a monitor entry point and monitor exit point, and wherein executing the portion of the program includes:
• locating an entry address for an entry to the selected monitored region in the program;
• storing an entry op code found at the entry address;
• storing an entry monitor point at the entry address, the entry monitor point configured to be an instruction that will interrupt execution of the program;
• locating an exit address for an exit to the selected monitored region in the program;
• storing an exit op code found at the exit address;
• and
• storing an exit monitor point at the exit address, the exit monitor point configured to be an instruction that will interrupt execution of the program.

An apparatus comprising:

• a memory;
• a first program, resident in the memory, the first program including a plurality of threads, wherein each of the plurality of threads includes a thread identifier;
• and
• a second program, resident in the memory, the second program configured to select a region from the first program to be monitored in response to user input, to execute a portion of the first program, to monitor the threads that are executing within the selected monitored region in the first program, to store the thread identifiers for the threads that are executing within the selected monitored region, and to suspend all threads when the stored thread identifiers exceeds a monitor threshold.

An apparatus comprising:

• a memory;
• a first program, resident in the memory, the first program including a plurality of threads;
• a second program, resident in the memory, the second program configured to execute a portion of the first program and to monitor the threads that are executing within a selected monitored region in the first program, wherein the second program is configured to monitor the threads with a plurality of control points inserted into the first program;
• and
• a table configured to define the plurality of control points, wherein the second program references the table to process a control point encountered during execution of the first program.

A program product, comprising:

• a first program configured to execute a portion of a multi-thread program of the type including a plurality of threads, wherein each of the plurality of threads includes a thread identifier;
• the first program further configured to select a region from the multi-thread program to be monitored in response to user input, to monitor the threads that are executing within the selected monitored region in the multi-thread program, to store the three identifiers for the threads that are executing within the selected monitored region, and to suspend all threads when the stored thread identifiers exceeds a monitor threshold;
• and
• a signal bearing media bearing the first program.