b4f2d7cde5
Implement support for the "t" action that is used to stop a thread. Normally this action is used only in non-stop mode. However, there's no technical reason why it couldn't be also used in all-stop mode, e.g. to express "resume all threads except ..." (`t:...;c`). While at it, add a more complete test for vCont correctly resuming a subset of program's threads. Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.llvm.org/D126983
50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#include "pseudo_barrier.h"
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#include "thread.h"
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#include <chrono>
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#include <cinttypes>
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#include <csignal>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <thread>
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#include <unistd.h>
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#include <vector>
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pseudo_barrier_t barrier;
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static void sigusr1_handler(int signo) {
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char buf[100];
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std::snprintf(buf, sizeof(buf),
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"received SIGUSR1 on thread id: %" PRIx64 "\n",
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get_thread_id());
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write(STDOUT_FILENO, buf, strlen(buf));
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}
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static void thread_func() {
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pseudo_barrier_wait(barrier);
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for (int i = 0; i < 300; ++i) {
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std::printf("thread %" PRIx64 " running\n", get_thread_id());
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std::this_thread::sleep_for(std::chrono::milliseconds(200));
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}
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}
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int main(int argc, char **argv) {
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int num = atoi(argv[1]);
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pseudo_barrier_init(barrier, num + 1);
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signal(SIGUSR1, sigusr1_handler);
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std::vector<std::thread> threads;
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for(int i = 0; i < num; ++i)
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threads.emplace_back(thread_func);
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pseudo_barrier_wait(barrier);
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std::puts("@started");
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for (std::thread &thread : threads)
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thread.join();
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return 0;
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}
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