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For my current embedded application I am trying to put GDB watch point at a fixed memory address.
As an example, my application updates the following address: 0x10793ad0. In order to be sure which part of the code is corrupting the value, I tried
watch 0x10793ad0 Even though GDB does not print any error after this, it is not able to break during execution even though I verified the value is getting modified at between start and end of execution.
Questions:
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Setting watchpoints. You can use a watchpoint to stop execution whenever the value of an expression changes, without having to predict a particular place where this may happen. Depending on your system, watchpoints may be implemented in software or hardware.
Watchpoints can be used to monitor “write”, “read” or “read/write” accesses. For example, a watchpoint might be configured to trip when a variable gets updated, a region of the stack is written to, or a particular buffer is read from.
Simply quit GDB, and all breakpoints and watchpoints will be gone. Or do (gdb) delete (without specifying a break point), and confirm that you want to delete all.
The right way to set watchpoint on address is watch *0x10793ad0. See gdb doc
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