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subproc: comments around new proc stack

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This commit is contained in:
Robert Swiecki 2017-10-19 13:11:41 +02:00
parent c33b1c87af
commit 94e593eb68
1 changed files with 5 additions and 3 deletions
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8
subproc.c
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@ -398,9 +398,11 @@ static bool subprocInitParent(struct nsjconf_t* nsjconf, pid_t pid, int pipefd)
return true;
}
/* Will be used inside the child process only, so it's safe to have it in BSS */
static uint8_t subprocCloneStack[128 * 1024]
__attribute__((aligned(__BIGGEST_ALIGNMENT__))); /* 128 KiB */
/*
* Will be used inside the child process only, so it's safe to have it in BSS.
* Some CPU archs (e.g. aarch64) must have it aligned. Size: 128 KiB (/2)
*/
static uint8_t subprocCloneStack[128 * 1024] __attribute__((aligned(__BIGGEST_ALIGNMENT__)));
/* Cannot be on the stack, as the child's stack pointer will change after clone() */
static __thread jmp_buf env;