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- Set a watchpoint on a variable when it is written to.
- (lldb) watchpoint set variable -w write global_var
- (lldb) watch set var -w write global_var
- (gdb) watch global_var
- Set a watchpoint on a memory location when it is written into. The size of the region to watch for defaults to the pointer size if no '-x byte_size' is specified. This command takes raw input, evaluated as an expression returning an unsigned integer pointing to the start of the region, after the '--' option terminator.
- (lldb) watchpoint set expression -w write -- my_ptr
- (lldb) watch set exp -w write -- my_ptr
- (gdb) watch -location g_char_ptr
- Set a condition on a watchpoint.
- (lldb) watch set var -w write global
- (lldb) watchpoint modify -c '(global==5)'
- (lldb) c
- (lldb) bt
- * thread #1: tid = 0x1c03, 0x0000000100000ef5 a.out`modify + 21 at main.cpp:16, stop reason = watchpoint 1
- frame #0: 0x0000000100000ef5 a.out`modify + 21 at main.cpp:16
- frame #1: 0x0000000100000eac a.out`main + 108 at main.cpp:25
- frame #2: 0x00007fff8ac9c7e1 libdyld.dylib`start + 1
- (lldb) frame var global
- (int32_t) global = 5
- List all watchpoints.
- (lldb) watchpoint list
- (lldb) watch l
- (gdb) info break
- Delete a watchpoint.
- (lldb) watchpoint delete 1
- (lldb) watch del 1
- (gdb) delete 1
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