subproc: comments
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Makefile
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Makefile
@ -152,4 +152,3 @@ subproc.o: util.h
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user.o: user.h common.h log.h subproc.h util.h
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user.o: user.h common.h log.h subproc.h util.h
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util.o: util.h common.h log.h
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util.o: util.h common.h log.h
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uts.o: uts.h common.h log.h
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uts.o: uts.h common.h log.h
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config.pb-c.o: config.pb-c.h
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@ -375,7 +375,9 @@ static bool subprocInitParent(struct nsjconf_t *nsjconf, pid_t pid, int pipefd)
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return true;
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return true;
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}
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}
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static uint8_t subprocCloneStack[PTHREAD_STACK_MIN * 2];
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/* Will be used inside the child process only, so it's save to have it in BSS */
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static uint8_t subprocCloneStack[128 * 1024]; /* 128 KiB */
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/* Cannot be on the stack, as the child's stack pointer will change after clone() */
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static __thread jmp_buf env;
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static __thread jmp_buf env;
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static int subprocCloneFunc(void *arg __attribute__ ((unused)))
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static int subprocCloneFunc(void *arg __attribute__ ((unused)))
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@ -385,7 +387,7 @@ static int subprocCloneFunc(void *arg __attribute__ ((unused)))
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}
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}
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/*
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/*
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* Avoid problems with caching of PID/TID in glibc - when using syscall(__NR_clone) glibc will
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* Avoid problems with caching of PID/TID in glibc - when using syscall(__NR_clone) glibc doesn't
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* not update internal PID/TID caches, which can lead to invalid values returned by getpid(),
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* not update internal PID/TID caches, which can lead to invalid values returned by getpid(),
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* or wrong PID/TIDs being used in raise()/abort() functions
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* or wrong PID/TIDs being used in raise()/abort() functions
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*/
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*/
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