getcallstack when breakpoint is hit

[weidehai]

Feature type

Plug-ins

Describe the feature

is there has any plugin to getcallstack when breakpoint is hit? if not, can someone provide some ideas on how to implement it? I have read the developer documentation but couldn't find a directly usable API.

[mrexodia]

You can get the call stack of the current thread from a plugin with the following code:

DBGCALLSTACK callstack = {};
if(!DbgFunctions()->GetCallStackEx(&callstack, /*cache=*/ false)) {
    dputs("failed to get call stack");
    return false;
}
for(int i = 0; i < callstack.total; i++) {
    const auto& e= callstack.entries[i];
    dprintf("callstack[%d] = { .addr = %p, .from = %p, .to = %p, comment = %s }", i, e.addr, e.from, e.to, e.comment);
}
BridgeFree(callstack.entries);

To do this at every breakpoint you can register a CBBREAKPOINT callback, but most likely you will want to create your own command with _plugin_registercommand and then use that command on the breakpoints you're interested in.

Could you explain what you end goal is with this? Because there might be an easier way to achieve it...

[weidehai]

i got a memory address, and set a hardware access breakpoint on it. but the breakpoint was hit many time, If I analyze when each time the breakpoint was hit to find the desired call stack, it is very time-consuming and a clumsy method. so i want to write a plugin to find call stack at each breakpoint hit,and then set breakpoint on every function call in call stack,then filter out breakpoint that hit count is 1(because i known the call stack which i want only call once)

[torusrxxx]

If you don't want to write a plugin, you can also use printstack command to print the call stack in log.