How to set up gdb watchpoints in a program consisting of many files in C++ ?

Question

I am trying to set up a watchpoint to monitor a variable in a package consisting of many C++ files.

There are many files

abc.cpp qwe.cpp .. xyz.cpp and so on

I want to monitor a variable 'temp' in some function qwerty() in the file abc.cpp How do I set the watchpoint ?

I tried

watch abc.cpp::temp watch abc.cpp:temp watch temp

but I see the errors No symbols 'abc.cpp::temp','abc.cpp:temp','temp' not in current context Also a info watchpoints tells me that no watchpoints are set. Note that I can set the breakpoints successfully for the same variable

Answer 1

I always set a breakpoint in the function, then set the watchpoint when I hit it, so that I'm in the context, then delete the breakpoint as appropriate.

Answer 2

Do you want to make conditional breakpoints? If then you can use the commands below.

(gdb) break abc::qwerty()
(gdb) condition 1 temp=1 // If you want to break when the value of temp = 1.