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internal/process.h: add a no-warning simple wrapper for fork(2)

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As fork(2) is deprecated, its calls must be guarded by
`COMPILER_WARNING_IGNORED(-Wdeprecated-declarations)`.
All usages of fork(2) in process have been alread guarded.  A new call
to fork(2) was added in ruby.c with f22c4ff359.
This caused a build failure on Solaris 11.

It may hide a bug to guard big code unnecessarily, so this change
introduces a simple wrapper "rb_fork" whose definition is guarded, and
replaces all calls to fork(2) with the wrapper function.
This commit is contained in:
Yusuke Endoh 2020-05-02 21:34:10 +09:00
parent bb2ca76237
commit 91e4e2403e
4 changed files with 18 additions and 14 deletions
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1
common.mk
View file

@ -11806,6 +11806,7 @@ ruby.$(OBJEXT): $(top_srcdir)/internal/parse.h
ruby.$(OBJEXT): $(top_srcdir)/internal/serial.h
ruby.$(OBJEXT): $(top_srcdir)/internal/static_assert.h
ruby.$(OBJEXT): $(top_srcdir)/internal/string.h
ruby.$(OBJEXT): $(top_srcdir)/internal/process.h
ruby.$(OBJEXT): $(top_srcdir)/internal/variable.h
ruby.$(OBJEXT): $(top_srcdir)/internal/vm.h
ruby.$(OBJEXT): $(top_srcdir)/internal/warnings.h

12
internal/process.h
View file

@ -22,6 +22,7 @@
#include "ruby/ruby.h" /* for VALUE */
#include "internal/imemo.h" /* for RB_IMEMO_TMPBUF_PTR */
#include "internal/warnings.h" /* for COMPILER_WARNING_PUSH */
#define RB_MAX_GROUPS (65536)
@ -113,4 +114,15 @@ ARGVSTR2ARGC(VALUE argv_str)
return i - 1;
}
COMPILER_WARNING_PUSH
#if __has_warning("-Wdeprecated-declarations") || RUBY3_COMPILER_IS(GCC)
COMPILER_WARNING_IGNORED(-Wdeprecated-declarations)
#endif
static inline rb_pid_t
rb_fork(void)
{
return fork();
}
COMPILER_WARNING_POP
#endif /* INTERNAL_PROCESS_H */

16
process.c
View file

@ -3957,10 +3957,6 @@ disable_child_handler_fork_child(struct child_handler_disabler_state *old, char
return 0;
}
COMPILER_WARNING_PUSH
#if __has_warning("-Wdeprecated-declarations") || RUBY3_COMPILER_IS(GCC)
COMPILER_WARNING_IGNORED(-Wdeprecated-declarations)
#endif
static rb_pid_t
retry_fork_async_signal_safe(int *status, int *ep,
int (*chfunc)(void*, char *, size_t), void *charg,
@ -3985,9 +3981,9 @@ retry_fork_async_signal_safe(int *status, int *ep,
if (!has_privilege())
pid = vfork();
else
pid = fork();
pid = rb_fork();
#else
pid = fork();
pid = rb_fork();
#endif
if (pid == 0) {/* fork succeed, child process */
int ret;
@ -4021,7 +4017,6 @@ retry_fork_async_signal_safe(int *status, int *ep,
return -1;
}
}
COMPILER_WARNING_POP
static rb_pid_t
fork_check_err(int *status, int (*chfunc)(void*, char *, size_t), void *charg,
@ -4075,10 +4070,6 @@ rb_fork_async_signal_safe(int *status,
return fork_check_err(status, chfunc, charg, fds, errmsg, errmsg_buflen, 0);
}
COMPILER_WARNING_PUSH
#if __has_warning("-Wdeprecated-declarations") || RUBY3_COMPILER_IS(GCC)
COMPILER_WARNING_IGNORED(-Wdeprecated-declarations)
#endif
rb_pid_t
rb_fork_ruby(int *status)
{
@ -4093,7 +4084,7 @@ rb_fork_ruby(int *status)
if (mjit_enabled) mjit_pause(false); // Don't leave locked mutex to child. Note: child_handler must be enabled to pause MJIT.
disable_child_handler_before_fork(&old);
before_fork_ruby();
pid = fork();
pid = rb_fork();
err = errno;
after_fork_ruby();
disable_child_handler_fork_parent(&old); /* yes, bad name */
@ -4105,7 +4096,6 @@ rb_fork_ruby(int *status)
return -1;
}
}
COMPILER_WARNING_POP
#endif

3
ruby.c
View file

@ -56,6 +56,7 @@
#include "internal/missing.h"
#include "internal/object.h"
#include "internal/parse.h"
#include "internal/process.h"
#include "internal/variable.h"
#include "mjit.h"
#include "ruby/encoding.h"
@ -1635,7 +1636,7 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
#ifdef HAVE_WORKING_FORK
int fds[2];
if (rb_pipe(fds) == 0) {
rb_pid_t pid = fork();
rb_pid_t pid = rb_fork();
if (pid > 0) {
/* exec PAGER with reading from child */
dup2(fds[0], 0);