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From: Martin Liska <marxin@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/marxin/heads/jobserver-refactoring)] Factor out jobserver_active_p. Date: Tue, 9 Aug 2022 10:59:32 +0000 (GMT) [thread overview] Message-ID: <20220809105932.B5896385736C@sourceware.org> (raw) https://gcc.gnu.org/g:bbef10716b029f5570e71b88d157488b6545a7e9 commit bbef10716b029f5570e71b88d157488b6545a7e9 Author: Martin Liska <mliska@suse.cz> Date: Thu Aug 4 12:05:27 2022 +0200 Factor out jobserver_active_p. Diff: --- gcc/gcc.cc | 36 +++-------------------- gcc/jobserver.h | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ gcc/lto-wrapper.cc | 43 +++++---------------------- 3 files changed, 97 insertions(+), 67 deletions(-) diff --git a/gcc/gcc.cc b/gcc/gcc.cc index 5cbb38560b2..69fbd293eaa 100644 --- a/gcc/gcc.cc +++ b/gcc/gcc.cc @@ -43,6 +43,7 @@ compilation is specified by a string called a "spec". */ #include "opts.h" #include "filenames.h" #include "spellcheck.h" +#include "jobserver.h" \f @@ -9178,38 +9179,9 @@ driver::final_actions () const void driver::detect_jobserver () const { - /* Detect jobserver and drop it if it's not working. */ - const char *makeflags = env.get ("MAKEFLAGS"); - if (makeflags != NULL) - { - const char *needle = "--jobserver-auth="; - const char *n = strstr (makeflags, needle); - if (n != NULL) - { - int rfd = -1; - int wfd = -1; - - bool jobserver - = (sscanf (n + strlen (needle), "%d,%d", &rfd, &wfd) == 2 - && rfd > 0 - && wfd > 0 - && is_valid_fd (rfd) - && is_valid_fd (wfd)); - - /* Drop the jobserver if it's not working now. */ - if (!jobserver) - { - unsigned offset = n - makeflags; - char *dup = xstrdup (makeflags); - dup[offset] = '\0'; - - const char *space = strchr (makeflags + offset, ' '); - if (space != NULL) - strcpy (dup + offset, space); - xputenv (concat ("MAKEFLAGS=", dup, NULL)); - } - } - } + jobserver_info jinfo; + if (!jinfo.is_active && !jinfo.skipped_makeflags.empty ()) + xputenv (jinfo.skipped_makeflags.c_str ()); } /* Determine what the exit code of the driver should be. */ diff --git a/gcc/jobserver.h b/gcc/jobserver.h new file mode 100644 index 00000000000..85453dd3c79 --- /dev/null +++ b/gcc/jobserver.h @@ -0,0 +1,85 @@ +/* GNU make's jobserver related functionality. + Copyright (C) 2022 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. + +See dbgcnt.def for usage information. */ + +#ifndef GCC_JOBSERVER_H +#define GCC_JOBSERVER_H + +#include <string> + +using namespace std; + +struct jobserver_info +{ + /* Default constructor. */ + jobserver_info (); + + /* Error message if there is a problem. */ + string error_msg = ""; + /* Skipped MAKEFLAGS where --jobserver-auth is skipped. */ + string skipped_makeflags = ""; + /* File descriptor for reading used for jobserver communication. */ + int rfd = -1; + /* File descriptor for writing used for jobserver communication. */ + int wfd = -1; + /* Return true if jobserver is active. */ + bool is_active = false; +}; + +jobserver_info::jobserver_info () +{ + /* Detect jobserver and drop it if it's not working. */ + string js_needle = "--jobserver-auth="; + + const char *envval = getenv ("MAKEFLAGS"); + if (envval != NULL) + { + string makeflags = envval; + size_t n = makeflags.rfind (js_needle); + if (n != string::npos) + { + if (sscanf (makeflags.c_str () + n + js_needle.size (), + "%d,%d", &rfd, &wfd) == 2 + && rfd > 0 + && wfd > 0 + && is_valid_fd (rfd) + && is_valid_fd (wfd)) + is_active = true; + else + { + string dup = makeflags.substr (0, n); + size_t pos = makeflags.find (' ', n); + if (pos != string::npos) + dup += makeflags.substr (pos); + skipped_makeflags = "MAKEFLAGS=" + dup; + error_msg + = "cannot access %<" + js_needle + "%> file descriptors"; + } + } + error_msg = "%<" + js_needle + "%> is not present in %<MAKEFLAGS%>"; + } + else + error_msg = "%<MAKEFLAGS%> environment variable is unset"; + + if (!error_msg.empty ()) + error_msg = "jobserver is not available: " + error_msg; +} + +#endif /* GCC_JOBSERVER_H */ diff --git a/gcc/lto-wrapper.cc b/gcc/lto-wrapper.cc index 795ab74555c..9279958d055 100644 --- a/gcc/lto-wrapper.cc +++ b/gcc/lto-wrapper.cc @@ -49,6 +49,8 @@ along with GCC; see the file COPYING3. If not see #include "lto-section-names.h" #include "collect-utils.h" #include "opts-diagnostic.h" +#include "opt-suggestions.h" +#include "jobserver.h" /* Environment variable, used for passing the names of offload targets from GCC driver to lto-wrapper. */ @@ -1336,35 +1338,6 @@ init_num_threads (void) #endif } -/* Test and return reason why a jobserver cannot be detected. */ - -static const char * -jobserver_active_p (void) -{ - #define JS_PREFIX "jobserver is not available: " - #define JS_NEEDLE "--jobserver-auth=" - - const char *makeflags = getenv ("MAKEFLAGS"); - if (makeflags == NULL) - return JS_PREFIX "%<MAKEFLAGS%> environment variable is unset"; - - const char *n = strstr (makeflags, JS_NEEDLE); - if (n == NULL) - return JS_PREFIX "%<" JS_NEEDLE "%> is not present in %<MAKEFLAGS%>"; - - int rfd = -1; - int wfd = -1; - - if (sscanf (n + strlen (JS_NEEDLE), "%d,%d", &rfd, &wfd) == 2 - && rfd > 0 - && wfd > 0 - && is_valid_fd (rfd) - && is_valid_fd (wfd)) - return NULL; - else - return JS_PREFIX "cannot access %<" JS_NEEDLE "%> file descriptors"; -} - /* Print link to -flto documentation with a hint message. */ void @@ -1422,7 +1395,6 @@ run_gcc (unsigned argc, char *argv[]) bool jobserver_requested = false; int auto_parallel = 0; bool no_partition = false; - const char *jobserver_error = NULL; bool fdecoded_options_first = true; vec<cl_decoded_option> fdecoded_options; fdecoded_options.create (16); @@ -1653,14 +1625,14 @@ run_gcc (unsigned argc, char *argv[]) } else { - jobserver_error = jobserver_active_p (); - if (jobserver && jobserver_error != NULL) + jobserver_info jinfo; + if (jobserver && !jinfo.is_active) { /* Fall back to auto parallelism. */ jobserver = 0; auto_parallel = 1; } - else if (!jobserver && jobserver_error == NULL) + else if (!jobserver && jinfo.is_active) { parallel = 1; jobserver = 1; @@ -1971,9 +1943,10 @@ cont: if (nr > 1) { - if (jobserver_requested && jobserver_error != NULL) + jobserver_info jinfo; + if (jobserver_requested && !jinfo.is_active) { - warning (0, jobserver_error); + warning (0, jinfo.error_msg.c_str ()); print_lto_docs_link (); } else if (parallel == 0)
next reply other threads:[~2022-08-09 10:59 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-08-09 10:59 Martin Liska [this message] 2022-08-09 11:03 Martin Liska 2022-08-10 7:15 Martin Liska 2022-08-10 7:18 Martin Liska 2022-08-10 11:09 Martin Liska
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