Method installTraps

src/profiler.cpp:583–613

}

Error Profiler::installTraps(const char* begin, const char* end, bool nostop) {
    const void* begin_addr = NULL;
    if (begin != NULL && (begin_addr = resolveSymbol(begin)) == NULL) {
        return Error("Begin address not found");
    }

    const void* end_addr = NULL;
    if (end != NULL && (end_addr = resolveSymbol(end)) == NULL) {
        return Error("End address not found");
    }

    // Having 'begin' and 'end' traps at the same address would result in an infinite loop
    if (begin_addr && begin_addr == end_addr) {
        return Error("begin and end symbols should not resolve to the same address");
    }

    _begin_trap.assign(begin_addr);
    _end_trap.assign(end_addr);
    _nostop = nostop;

    if (_begin_trap.entry() == 0) {
        _engine->enableEvents(true);
    } else {
        _engine->enableEvents(nostop);
        if (!_begin_trap.install()) {
            return Error("Cannot install begin breakpoint");
        }
    }

    return Error::OK;
}

void Profiler::uninstallTraps() {
    _begin_trap.uninstall();