forked from OSchip/llvm-project
51 lines
1.0 KiB
C++
51 lines
1.0 KiB
C++
#include <sys/types.h>
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#include <sys/wait.h>
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#include <assert.h>
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#if defined(TEST_CLONE)
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#include <sched.h>
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <unistd.h>
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int g_val = 0;
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void parent_func() {
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g_val = 1;
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printf("function run in parent\n");
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}
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int child_func(void *unused) {
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// we need to avoid memory modifications for vfork(), yet we want
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// to be able to test watchpoints, so do the next best thing
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// and restore the original value
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g_val = 2;
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g_val = 0;
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return 0;
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}
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int main() {
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alignas(uintmax_t) char stack[4096];
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#if defined(TEST_CLONE)
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pid_t pid = clone(child_func, &stack[sizeof(stack)], 0, NULL);
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#elif defined(TEST_FORK)
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pid_t pid = TEST_FORK();
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if (pid == 0)
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_exit(child_func(NULL));
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#endif
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assert(pid != -1);
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parent_func();
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int status, wait_flags = 0;
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#if defined(TEST_CLONE)
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wait_flags = __WALL;
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#endif
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pid_t waited = waitpid(pid, &status, wait_flags);
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assert(waited == pid);
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assert(WIFEXITED(status));
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printf("child exited: %d\n", WEXITSTATUS(status));
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return 0;
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}
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