diff options
author | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-09-01 05:40:02 +0000 |
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committer | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-09-01 05:40:02 +0000 |
commit | c91b7154f278c7c9ed1f46b61b5e1155cf28066a (patch) | |
tree | 25aa26b8506637abec376848273118a065db4658 /thread.c | |
parent | 2c26edc15c4d30494601d5df11daea4a26a38465 (diff) |
merge revision(s) 64007,64019,64020: [Backport #14929]
thread.c (do_select): fix leak on exception
When do_select is interrupted and raise happens from
RUBY_VM_CHECK_INTS_BLOCKING, the original FD sets we copied
do not get freed, leading to a memory leak. Wrap up all the
FD sets into a Ruby object to ensure the GC can release an
allocations made for rb_fdset_t.
This leak existed since Ruby 2.0.0 (r36430)
[Bug #14929]
increase timeout seconds.
* test/ruby/test_io.rb (test_select_leak): increase timeout seconds
to pass this test on a high-load machine.
60 sec is not enough at all
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@64605 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'thread.c')
-rw-r--r-- | thread.c | 55 |
1 files changed, 42 insertions, 13 deletions
@@ -3748,23 +3748,53 @@ update_timeval(struct timeval *timeout, double limit) } } +struct select_set { + rb_fdset_t read; + rb_fdset_t write; + rb_fdset_t except; +}; + +static size_t +select_set_memsize(const void *p) +{ + return sizeof(struct select_set); +} + +static void +select_set_free(void *p) +{ + struct select_set *orig = p; + + rb_fd_term(&orig->read); + rb_fd_term(&orig->write); + rb_fd_term(&orig->except); + xfree(orig); +} + +static const rb_data_type_t select_set_type = { + "select_set", + {NULL, select_set_free, select_set_memsize,}, + 0, 0, RUBY_TYPED_FREE_IMMEDIATELY +}; + static int do_select(int n, rb_fdset_t *const readfds, rb_fdset_t *const writefds, rb_fdset_t *const exceptfds, struct timeval *timeout) { int MAYBE_UNUSED(result); int lerrno; - rb_fdset_t MAYBE_UNUSED(orig_read); - rb_fdset_t MAYBE_UNUSED(orig_write); - rb_fdset_t MAYBE_UNUSED(orig_except); double limit = 0; struct timeval wait_rest; rb_thread_t *th = GET_THREAD(); + VALUE o; + struct select_set *orig; + + o = TypedData_Make_Struct(0, struct select_set, &select_set_type, orig); #define do_select_update() \ - (restore_fdset(readfds, &orig_read), \ - restore_fdset(writefds, &orig_write), \ - restore_fdset(exceptfds, &orig_except), \ + (restore_fdset(readfds, &orig->read), \ + restore_fdset(writefds, &orig->write), \ + restore_fdset(exceptfds, &orig->except), \ update_timeval(timeout, limit), \ TRUE) @@ -3776,7 +3806,7 @@ do_select(int n, rb_fdset_t *const readfds, rb_fdset_t *const writefds, } #define fd_init_copy(f) \ - (f##fds) ? rb_fd_init_copy(&orig_##f, f##fds) : rb_fd_no_init(&orig_##f) + (f##fds) ? rb_fd_init_copy(&orig->f, f##fds) : rb_fd_no_init(&orig->f) fd_init_copy(read); fd_init_copy(write); fd_init_copy(except); @@ -3791,14 +3821,13 @@ do_select(int n, rb_fdset_t *const readfds, rb_fdset_t *const writefds, if (result < 0) lerrno = errno; }, ubf_select, th, FALSE); - RUBY_VM_CHECK_INTS_BLOCKING(th->ec); + RUBY_VM_CHECK_INTS_BLOCKING(th->ec); /* may raise */ } while (result < 0 && retryable(errno = lerrno) && do_select_update()); -#define fd_term(f) if (f##fds) rb_fd_term(&orig_##f) - fd_term(read); - fd_term(write); - fd_term(except); -#undef fd_term + /* didn't raise, perform cleanup ourselves */ + select_set_free(orig); + rb_gc_force_recycle(o); + return result; } |