dee5769870
Change the stepped function to spin on a flag until the helper thread advances the counter, so the step-over can only complete if the helper thread actually ran. Fixes #193398
50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#include <atomic>
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#include <pthread.h>
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#include <thread>
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static void set_thread_name(const char *name) {
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#if defined(__APPLE__)
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::pthread_setname_np(name);
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#elif defined(__FreeBSD__) || defined(__linux__)
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::pthread_setname_np(::pthread_self(), name);
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#elif defined(__NetBSD__)
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::pthread_setname_np(::pthread_self(), "%s", const_cast<char *>(name));
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#endif
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}
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volatile int g_helper_count = 0;
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volatile bool g_stop = false;
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volatile bool g_sync_with_helper = false;
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std::atomic<bool> g_ready{false};
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void helper_thread_func() {
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set_thread_name("always-run");
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g_ready.store(true);
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while (!g_stop) {
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g_helper_count++;
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}
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}
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int step_over_me() {
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if (g_sync_with_helper) {
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int count_at_entry = g_helper_count;
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while (g_helper_count <= count_at_entry)
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;
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}
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return 42;
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}
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int main() {
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std::thread helper(helper_thread_func);
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// Wait for the helper thread to start and set its name.
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while (!g_ready.load())
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;
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int val = step_over_me(); // break here
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val += step_over_me(); // after step
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g_stop = true;
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helper.join();
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return val > 0 ? 0 : 1;
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}
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