本文整理汇总了C++中Tracer::fork方法的典型用法代码示例。如果您正苦于以下问题：C++ Tracer::fork方法的具体用法？C++ Tracer::fork怎么用？C++ Tracer::fork使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Tracer的用法示例。
在下文中一共展示了Tracer::fork方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: sc
TEST(HooksTest, UnknownChildHook)
{
pid_t child_pid = fork();
if (child_pid == 0) {
_exit(0);
}
ASSERT_GE(child_pid, 0);
std::optional<pid_t> exited_pid;
std::optional<pid_t> unknown_pid;
Tracer tracer;
// Tracee must remain alive long enough for child_pid to exit
auto tracee = tracer.fork([] { while (true) pause(); });
ASSERT_TRUE(tracee);
auto tracee_tid = tracee.value()->tid;
Hooks hooks;
hooks.syscall_entry = [&](auto t, auto &info) {
if (unknown_pid) {
SysCall sc("exit_group", info.syscall.abi());
assert(sc);
(void) t->modify_syscall_args(sc.num(), {});
}
return action::Default{};
};
hooks.tracee_exit = [&](auto pid, auto) {
exited_pid = pid;
return action::Default{};
};
hooks.unknown_child = [&](auto pid, auto) {
unknown_pid = pid;
// tracee must be a valid pointer because this hook would not have been
// called if the only tracee exited or died
(void) tracee.value()->interrupt();
};
ASSERT_TRUE(tracer.execute(hooks));
ASSERT_EQ(exited_pid, tracee_tid);
ASSERT_EQ(unknown_pid, child_pid);
}示例2: raise
TEST(HooksTest, TraceeDeathHook)
{
std::optional<int> death_signal;
Hooks hooks;
hooks.tracee_death = [&](auto, auto signal) {
death_signal = signal;
return action::Default{};
};
Tracer tracer;
ASSERT_TRUE(tracer.fork([&] {
raise(SIGTERM);
}));
ASSERT_TRUE(tracer.execute(hooks));
ASSERT_EQ(death_signal, SIGTERM);
}示例3:
TEST(HooksTest, TraceeExitHook)
{
std::optional<int> exit_code;
Hooks hooks;
hooks.tracee_exit = [&](auto, auto ec) {
exit_code = ec;
return action::Default{};
};
Tracer tracer;
ASSERT_TRUE(tracer.fork([&] {
_exit(10);
}));
ASSERT_TRUE(tracer.execute(hooks));
ASSERT_EQ(exit_code, 10);
}