autofs-5.1.7 - use default stack size for threads
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From: Ian Kent <raven@themaw.net>
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autofs uses PTHREAD_STACK_MIN to set the stack size for threads it
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creates.
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In two cases it is used to reduce the stack size for long running
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service threads while it's used to allocate a larger stack for worker
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threads that can have larger memory requirements.
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In recent glibc releases PTHREAD_STACK_MIN is no longer a constant
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which can lead to unexpectedly different stack sizes on different
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architectures and the autofs assumption it's a constant causes a
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compile failure.
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The need to alter the stack size was due to observed stack overflow
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which was thought to be due the thread stack being too small for autofs
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and glibc alloca(3) usage.
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Quite a bit of that alloca(3) usage has been eliminated from autofs now,
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particularly those that might be allocating largish amounts of storage,
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and there has been a lot of change in glibc too so using the thread
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default stack should be ok.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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daemon/automount.c | 29 -----------------------------
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daemon/state.c | 6 +-----
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lib/alarm.c | 6 +-----
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4 files changed, 3 insertions(+), 39 deletions(-)
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--- a/daemon/automount.c
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+++ b/daemon/automount.c
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@@ -92,7 +92,6 @@ static size_t kpkt_len;
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/* Attributes for creating detached and joinable threads */
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pthread_attr_t th_attr;
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pthread_attr_t th_attr_detached;
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-size_t detached_thread_stack_size = PTHREAD_STACK_MIN * 144;
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struct master_readmap_cond mrc = {
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PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, NULL, 0, 0, 0, 0};
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@@ -2617,34 +2616,6 @@ int main(int argc, char *argv[])
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if (start_pipefd[1] != -1) {
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res = write(start_pipefd[1], pst_stat, sizeof(*pst_stat));
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close(start_pipefd[1]);
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- }
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- release_flag_file();
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- macro_free_global_table();
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- exit(1);
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- }
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-
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-#ifdef _POSIX_THREAD_ATTR_STACKSIZE
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- if (pthread_attr_setstacksize(
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- &th_attr_detached, detached_thread_stack_size)) {
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- logerr("%s: failed to set stack size thread attribute!",
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- program);
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- if (start_pipefd[1] != -1) {
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- res = write(start_pipefd[1], pst_stat, sizeof(*pst_stat));
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- close(start_pipefd[1]);
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- }
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- release_flag_file();
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- macro_free_global_table();
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- exit(1);
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- }
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-#endif
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-
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- if (pthread_attr_getstacksize(
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- &th_attr_detached, &detached_thread_stack_size)) {
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- logerr("%s: failed to get detached thread stack size!",
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- program);
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- if (start_pipefd[1] != -1) {
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- res = write(start_pipefd[1], pst_stat, sizeof(*pst_stat));
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- close(start_pipefd[1]);
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}
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release_flag_file();
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macro_free_global_table();
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--- a/daemon/state.c
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+++ b/daemon/state.c
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@@ -1173,12 +1173,8 @@ int st_start_handler(void)
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status = pthread_attr_init(pattrs);
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if (status)
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pattrs = NULL;
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- else {
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+ else
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pthread_attr_setdetachstate(pattrs, PTHREAD_CREATE_DETACHED);
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-#ifdef _POSIX_THREAD_ATTR_STACKSIZE
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- pthread_attr_setstacksize(pattrs, PTHREAD_STACK_MIN*4);
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-#endif
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- }
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status = pthread_create(&thid, pattrs, st_queue_handler, NULL);
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--- a/lib/alarm.c
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+++ b/lib/alarm.c
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@@ -270,12 +270,8 @@ int alarm_start_handler(void)
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status = pthread_attr_init(pattrs);
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if (status)
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pattrs = NULL;
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- else {
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+ else
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pthread_attr_setdetachstate(pattrs, PTHREAD_CREATE_DETACHED);
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-#ifdef _POSIX_THREAD_ATTR_STACKSIZE
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- pthread_attr_setstacksize(pattrs, PTHREAD_STACK_MIN*4);
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-#endif
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- }
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status = pthread_condattr_init(&condattrs);
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if (status)
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