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GET /api/1.2/patches/2221359/?format=api
{ "id": 2221359, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221359/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/patch/20260409-clock_settime_fix-v4-1-1cbd6d006cea@suse.com/", "project": { "id": 59, "url": "http://patchwork.ozlabs.org/api/1.2/projects/59/?format=api", "name": "Linux Test Project development", "link_name": "ltp", "list_id": "ltp.lists.linux.it", "list_email": "ltp@lists.linux.it", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260409-clock_settime_fix-v4-1-1cbd6d006cea@suse.com>", "list_archive_url": null, "date": "2026-04-09T08:55:47", "name": "[v4] clock_settime: Detect external clock adjustments via CLOCK_MONOTONIC", "commit_ref": null, "pull_url": null, "state": "needs-review-ack", "archived": false, "hash": "0b0096800e1e90456c7c54051a00c98fb4a3e776", "submitter": { "id": 83220, "url": "http://patchwork.ozlabs.org/api/1.2/people/83220/?format=api", "name": "Andrea Cervesato", "email": "andrea.cervesato@suse.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ltp/patch/20260409-clock_settime_fix-v4-1-1cbd6d006cea@suse.com/mbox/", "series": [ { "id": 499264, "url": "http://patchwork.ozlabs.org/api/1.2/series/499264/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/list/?series=499264", "date": "2026-04-09T08:55:47", "name": "[v4] clock_settime: Detect external clock adjustments via CLOCK_MONOTONIC", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/499264/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221359/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/2221359/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "ltp@lists.linux.it" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "ltp@picard.linux.it" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=WQ6HAf0/;\n\tdkim=fail reason=\"signature verification failed\" header.d=suse.de\n header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519\n header.b=Rrs28PbZ;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key)\n header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa\n header.b=WQ6HAf0/;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=Rrs28PbZ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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TO_DN_ALL(0.00)[];\n FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[];\n DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[];\n RCPT_COUNT_THREE(0.00)[3]; FROM_EQ_ENVFROM(0.00)[];\n MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2];\n RCVD_VIA_SMTP_AUTH(0.00)[];\n DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo, suse.com:mid,\n suse.com:email]", "X-Spam-Score": "-4.30", "X-Spam-Level": "", "X-Spam-Status": "No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID,\n DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS shortcircuit=no\n autolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on in-5.smtp.seeweb.it", "X-Virus-Scanned": "clamav-milter 1.0.9 at in-5.smtp.seeweb.it", "X-Virus-Status": "Clean", "Subject": "[LTP] [PATCH v4] clock_settime: Detect external clock adjustments\n via CLOCK_MONOTONIC", "X-BeenThere": "ltp@lists.linux.it", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "Linux Test Project <ltp.lists.linux.it>", "List-Unsubscribe": "<https://lists.linux.it/options/ltp>,\n <mailto:ltp-request@lists.linux.it?subject=unsubscribe>", "List-Archive": "<http://lists.linux.it/pipermail/ltp/>", "List-Post": "<mailto:ltp@lists.linux.it>", "List-Help": "<mailto:ltp-request@lists.linux.it?subject=help>", "List-Subscribe": "<https://lists.linux.it/listinfo/ltp>,\n <mailto:ltp-request@lists.linux.it?subject=subscribe>", "Cc": "Claude <noreply@anthropic.com>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it", "Sender": "\"ltp\" <ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>" }, "content": "From: Andrea Cervesato <andrea.cervesato@suse.com>\n\nThese tests manipulate CLOCK_REALTIME to verify timer and\nclock_nanosleep behavior, but NTP or VM time sync can also adjust\nCLOCK_REALTIME during the test, causing timers to fire at wrong times\nand producing sporadic failures.\n\nAdd pts_mono_time_start()/pts_mono_time_check() helpers to detect\nexternal clock interference using CLOCK_MONOTONIC. When interference\nis detected, the test retries up to PTS_MONO_MAX_RETRIES times before\nreporting UNTESTED. Guard with _POSIX_MONOTONIC_CLOCK since\nCLOCK_MONOTONIC is optional in POSIX.1-2001.\n\nCo-developed-by: Claude <noreply@anthropic.com>\nSigned-off-by: Andrea Cervesato <andrea.cervesato@suse.com>\n---\nI used Claude to generate the right patches to fix sporadic issues in the\nclock_settime testing suite. We tried many attempt for fixing it, but the\nCLOCK_REALTIME usage seems to be the real issue in here. The idea is that\nwe use internal Openposix mechanisms to skip tests if CLOCK_MONOTONIC\nusage spots a possible interference from external tools.\n---\nChanges in v4:\n- handle return value for helpers functions\n- Link to v3: https://lore.kernel.org/r/20260401-clock_settime_fix-v3-1-f2d303703bd7@suse.com\n\nChanges in v3:\n- cycle multiple times before failing the tests\n\t- add helpers functions for CLOCK_MONOTONIC checks\n- Link to v2: https://lore.kernel.org/r/20260331-clock_settime_fix-v2-1-e222fe379b16@suse.com\n\nChanges in v2:\n- print a message if CLOCK_MONOTONIC is not available\n- always verify that CLOCK_MONOTONIC is available\n- Link to v1: https://lore.kernel.org/r/20260331-clock_settime_fix-v1-1-dfae06df2436@suse.com\n---\n .../conformance/interfaces/clock_settime/4-1.c | 86 +++++++++------\n .../conformance/interfaces/clock_settime/5-1.c | 68 +++++++-----\n .../conformance/interfaces/clock_settime/5-2.c | 58 ++++++----\n .../conformance/interfaces/clock_settime/7-1.c | 98 ++++++++++-------\n .../conformance/interfaces/clock_settime/7-2.c | 119 +++++++++++++--------\n .../conformance/interfaces/clock_settime/helpers.h | 55 ++++++++++\n 6 files changed, 323 insertions(+), 161 deletions(-)\n\n\n---\nbase-commit: 1c46589251d6efa461d0e837540c990cd6dea188\nchange-id: 20260331-clock_settime_fix-8e4117dcb609\n\nBest regards,", "diff": "diff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/4-1.c\nindex f8a3e9c542ca8c9767cdd0057005e519f58b2b55..763a68fc2b5b085c67597fafa859b0aa300fb54b 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/4-1.c\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/4-1.c\n@@ -47,7 +47,7 @@ int main(void)\n \tint delta;\n \tint sig;\n \tsigset_t set;\n-\tint flags = 0;\n+\tint attempt, ret;\n \n \t/* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */\n \tif (geteuid() != 0) {\n@@ -77,49 +77,65 @@ int main(void)\n \t\treturn PTS_UNRESOLVED;\n \t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tpT0) != 0) {\n-\t\tperror(\"clock_gettime() was not successful\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n-\n \tif (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) {\n \t\tperror(\"timer_create() did not return success\\n\");\n \t\treturn PTS_UNRESOLVED;\n \t}\n \n-\tflags |= TIMER_ABSTIME;\n-\tits.it_interval.tv_sec = 0;\n-\tits.it_interval.tv_nsec = 0;\n-\tits.it_value.tv_sec = tpT0.tv_sec + TIMEROFFSET;\n-\tits.it_value.tv_nsec = tpT0.tv_nsec;\n-\tif (timer_settime(tid, flags, &its, NULL) != 0) {\n-\t\tperror(\"timer_settime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n-\n-\tsleep(SLEEPTIME);\n-\tgetBeforeTime(&tpreset);\n-\tif (clock_settime(CLOCK_REALTIME, &tpT0) != 0) {\n-\t\tperror(\"clock_settime() was not successful\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n-\n-\tif (sigwait(&set, &sig) == -1) {\n-\t\tperror(\"sigwait() was not successful\\n\");\n-\t\treturn PTS_UNRESOLVED;\n+\tfor (attempt = 0; attempt < PTS_MONO_MAX_RETRIES; attempt++) {\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tpT0) != 0) {\n+\t\t\tperror(\"clock_gettime() was not successful\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tif (pts_mono_time_start() != 0)\n+\t\t\treturn PTS_UNRESOLVED;\n+\n+\t\tits.it_interval.tv_sec = 0;\n+\t\tits.it_interval.tv_nsec = 0;\n+\t\tits.it_value.tv_sec = tpT0.tv_sec + TIMEROFFSET;\n+\t\tits.it_value.tv_nsec = tpT0.tv_nsec;\n+\t\tif (timer_settime(tid, TIMER_ABSTIME, &its, NULL) != 0) {\n+\t\t\tperror(\"timer_settime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tsleep(SLEEPTIME);\n+\t\tgetBeforeTime(&tpreset);\n+\t\tif (clock_settime(CLOCK_REALTIME, &tpT0) != 0) {\n+\t\t\tperror(\"clock_settime() was not successful\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tif (sigwait(&set, &sig) == -1) {\n+\t\t\tperror(\"sigwait() was not successful\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tpT2) != 0) {\n+\t\t\tprintf(\"clock_gettime() was not successful\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tdelta = tpT2.tv_sec - its.it_value.tv_sec;\n+\n+\t\t// add back time waited to reset value and reset time\n+\t\ttpreset.tv_sec += tpT2.tv_sec - tpT0.tv_sec;\n+\t\tsetBackTime(tpreset);\n+\n+\t\tret = pts_mono_time_check(SLEEPTIME + TIMEROFFSET);\n+\t\tif (ret < 0)\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\tif (ret == 0)\n+\t\t\tbreak;\n \t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tpT2) != 0) {\n-\t\tprintf(\"clock_gettime() was not successful\\n\");\n-\t\treturn PTS_UNRESOLVED;\n+\tif (attempt == PTS_MONO_MAX_RETRIES) {\n+\t\tprintf(\"UNTESTED: persistent clock interference after %d attempts\\n\",\n+\t\t PTS_MONO_MAX_RETRIES);\n+\t\treturn PTS_UNTESTED;\n \t}\n \n-\tdelta = tpT2.tv_sec - its.it_value.tv_sec;\n-\n-\t// add back time waited to reset value and reset time\n-\ttpreset.tv_sec += tpT2.tv_sec - tpT0.tv_sec;\n-\tsetBackTime(tpreset);\n-\n \tprintf(\"delta: %d\\n\", delta);\n \tif ((delta <= ACCEPTABLEDELTA) && (delta >= 0)) {\n \t\tprintf(\"Test PASSED\\n\");\ndiff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-1.c\nindex 75fa591e014601b2ef9308a118992a704365392b..875cb7a80953d008e93beaa9aa4d88b94d676bec 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-1.c\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-1.c\n@@ -49,6 +49,8 @@ int main(void)\n \tstruct itimerspec its;\n \ttimer_t tid;\n \tsigset_t set;\n+\tint ns_ret;\n+\tint attempt, ret;\n \n \t/* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */\n \tif (getuid() != 0) {\n@@ -92,42 +94,60 @@ int main(void)\n \tits.it_value.tv_sec = TIMERSEC;\n \tits.it_value.tv_nsec = 0;\n \n-\tif (timer_settime(tid, 0, &its, NULL) != 0) {\n-\t\tperror(\"timer_settime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n+\tfor (attempt = 0; attempt < PTS_MONO_MAX_RETRIES; attempt++) {\n+\t\tif (timer_settime(tid, 0, &its, NULL) != 0) {\n+\t\t\tperror(\"timer_settime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tsclock) != 0) {\n-\t\tprintf(\"clock_gettime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n+\t\tif (pts_mono_time_start() != 0)\n+\t\t\treturn PTS_UNRESOLVED;\n \n-\ttsclock.tv_sec -= CLOCKOFFSET;\n-\tgetBeforeTime(&tsreset);\n-\tif (clock_settime(CLOCK_REALTIME, &tsclock) != 0) {\n-\t\tprintf(\"clock_settime() was not successful\\n\");\n-\t\treturn PTS_UNRESOLVED;\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tsclock) != 0) {\n+\t\t\tprintf(\"clock_gettime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\ttsclock.tv_sec -= CLOCKOFFSET;\n+\t\tgetBeforeTime(&tsreset);\n+\t\tif (clock_settime(CLOCK_REALTIME, &tsclock) != 0) {\n+\t\t\tprintf(\"clock_settime() was not successful\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tts.tv_sec = TIMERSEC + SLEEPDELTA;\n+\t\tts.tv_nsec = 0;\n+\n+\t\tns_ret = nanosleep(&ts, &tsleft);\n+\n+\t\tret = pts_mono_time_check(TIMERSEC);\n+\t\ttsreset.tv_sec += TIMERSEC;\n+\t\tsetBackTime(tsreset);\n+\n+\t\tif (ret < 0)\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\tif (ret == 0)\n+\t\t\tbreak;\n \t}\n \n-\tts.tv_sec = TIMERSEC + SLEEPDELTA;\n-\tts.tv_nsec = 0;\n+\tif (attempt == PTS_MONO_MAX_RETRIES) {\n+\t\tprintf(\"UNTESTED: persistent clock interference after %d attempts\\n\",\n+\t\t PTS_MONO_MAX_RETRIES);\n+\t\treturn PTS_UNTESTED;\n+\t}\n \n-\tif (nanosleep(&ts, &tsleft) != -1) {\n+\tif (ns_ret != -1) {\n \t\tprintf(\"nanosleep() not interrupted\\n\");\n \t\treturn PTS_FAIL;\n \t}\n \n \tif (labs(tsleft.tv_sec - SLEEPDELTA) <= ACCEPTABLEDELTA) {\n \t\tprintf(\"Test PASSED\\n\");\n-\t\ttsreset.tv_sec += TIMERSEC;\n-\t\tsetBackTime(tsreset);\n \t\treturn PTS_PASS;\n-\t} else {\n-\t\tprintf(\"Timer did not last for correct amount of time\\n\");\n-\t\tprintf(\"timer: %d != correct %d\\n\",\n-\t\t (int)ts.tv_sec - (int)tsleft.tv_sec, TIMERSEC);\n-\t\treturn PTS_FAIL;\n \t}\n \n-\treturn PTS_UNRESOLVED;\n+\tprintf(\"Timer did not last for correct amount of time\\n\");\n+\tprintf(\"timer: %d != correct %d\\n\",\n+\t (int)ts.tv_sec - (int)tsleft.tv_sec, TIMERSEC);\n+\treturn PTS_FAIL;\n }\ndiff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-2.c\nindex b8a60028c6d3d1a3c0d75922f39697b57329c440..81dbeeb361e956e6b64dc582b596685c9750cfea 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-2.c\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/5-2.c\n@@ -49,6 +49,8 @@ int main(void)\n \tstruct itimerspec its;\n \ttimer_t tid;\n \tsigset_t set;\n+\tint ns_ret;\n+\tint attempt, ret;\n \n \t/* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */\n \tif (getuid() != 0) {\n@@ -92,35 +94,55 @@ int main(void)\n \tits.it_value.tv_sec = TIMERSEC;\n \tits.it_value.tv_nsec = 0;\n \n-\tif (timer_settime(tid, 0, &its, NULL) != 0) {\n-\t\tperror(\"timer_settime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n+\tfor (attempt = 0; attempt < PTS_MONO_MAX_RETRIES; attempt++) {\n+\t\tif (timer_settime(tid, 0, &its, NULL) != 0) {\n+\t\t\tperror(\"timer_settime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tsclock) != 0) {\n-\t\tprintf(\"clock_gettime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n+\t\tif (pts_mono_time_start() != 0)\n+\t\t\treturn PTS_UNRESOLVED;\n \n-\ttsclock.tv_sec += CLOCKOFFSET;\n-\tgetBeforeTime(&tsreset);\n-\tif (clock_settime(CLOCK_REALTIME, &tsclock) != 0) {\n-\t\tprintf(\"clock_settime() was not successful\\n\");\n-\t\treturn PTS_UNRESOLVED;\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tsclock) != 0) {\n+\t\t\tprintf(\"clock_gettime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\ttsclock.tv_sec += CLOCKOFFSET;\n+\t\tgetBeforeTime(&tsreset);\n+\t\tif (clock_settime(CLOCK_REALTIME, &tsclock) != 0) {\n+\t\t\tprintf(\"clock_settime() was not successful\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n+\n+\t\tts.tv_sec = TIMERSEC + SLEEPDELTA;\n+\t\tts.tv_nsec = 0;\n+\n+\t\tns_ret = nanosleep(&ts, &tsleft);\n+\n+\t\tret = pts_mono_time_check(TIMERSEC);\n+\t\ttsreset.tv_sec += TIMERSEC;\n+\t\tsetBackTime(tsreset);\n+\n+\t\tif (ret < 0)\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\tif (ret == 0)\n+\t\t\tbreak;\n \t}\n \n-\tts.tv_sec = TIMERSEC + SLEEPDELTA;\n-\tts.tv_nsec = 0;\n+\tif (attempt == PTS_MONO_MAX_RETRIES) {\n+\t\tprintf(\"UNTESTED: persistent clock interference after %d attempts\\n\",\n+\t\t PTS_MONO_MAX_RETRIES);\n+\t\treturn PTS_UNTESTED;\n+\t}\n \n-\tif (nanosleep(&ts, &tsleft) != -1) {\n+\tif (ns_ret != -1) {\n \t\tprintf(\"nanosleep() not interrupted\\n\");\n \t\treturn PTS_FAIL;\n \t}\n \n \tif (labs(tsleft.tv_sec - SLEEPDELTA) <= ACCEPTABLEDELTA) {\n \t\tprintf(\"Test PASSED\\n\");\n-\t\ttsreset.tv_sec += TIMERSEC;\n-\t\tsetBackTime(tsreset);\n \t\treturn PTS_PASS;\n \t}\n \ndiff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-1.c\nindex 569eae904ef2eff41441029d3427313107febe53..399caee5a44ef356090062030a5a36aa2ccac28e 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-1.c\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-1.c\n@@ -35,8 +35,9 @@\n \n int main(void)\n {\n-\tstruct timespec tsT0, tsT1;\n-\tint pid;\n+\tstruct timespec tsT0, tsT1, tsreset;\n+\tint pid, child_status;\n+\tint attempt, ret;\n \n \t/* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */\n \tif (getuid() != 0) {\n@@ -44,50 +45,54 @@ int main(void)\n \t\treturn PTS_UNTESTED;\n \t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tsT0) != 0) {\n-\t\tperror(\"clock_gettime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n-\n-\tif ((pid = fork()) == 0) {\n-\t\t/* child here */\n-\t\tint flags = 0;\n-\t\tstruct timespec tsT2;\n+\tfor (attempt = 0; attempt < PTS_MONO_MAX_RETRIES; attempt++) {\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tsT0) != 0) {\n+\t\t\tperror(\"clock_gettime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n \n-\t\ttsT1.tv_sec = tsT0.tv_sec + SLEEPOFFSET;\n-\t\ttsT1.tv_nsec = tsT0.tv_nsec;\n+\t\tif (pts_mono_time_start() != 0)\n+\t\t\treturn PTS_UNRESOLVED;\n \n-\t\tflags |= TIMER_ABSTIME;\n-\t\tif (clock_nanosleep(CLOCK_REALTIME, flags, &tsT1, NULL) != 0) {\n-\t\t\tprintf(\"clock_nanosleep() did not return success\\n\");\n-\t\t\treturn CHILDFAIL;\n+\t\tpid = fork();\n+\t\tif (pid < 0) {\n+\t\t\tperror(\"fork() failed\");\n+\t\t\treturn PTS_UNRESOLVED;\n \t\t}\n+\t\tif (pid == 0) {\n+\t\t\t/* child here */\n+\t\t\tint flags = 0;\n+\t\t\tstruct timespec tsT2;\n \n-\t\tif (clock_gettime(CLOCK_REALTIME, &tsT2) != 0) {\n-\t\t\tperror(\"clock_gettime() did not return success\\n\");\n-\t\t\treturn CHILDFAIL;\n-\t\t}\n+\t\t\ttsT1.tv_sec = tsT0.tv_sec + SLEEPOFFSET;\n+\t\t\ttsT1.tv_nsec = tsT0.tv_nsec;\n+\n+\t\t\tflags |= TIMER_ABSTIME;\n+\t\t\tif (clock_nanosleep(CLOCK_REALTIME, flags, &tsT1, NULL) != 0) {\n+\t\t\t\tprintf(\"clock_nanosleep() did not return success\\n\");\n+\t\t\t\treturn CHILDFAIL;\n+\t\t\t}\n+\n+\t\t\tif (clock_gettime(CLOCK_REALTIME, &tsT2) != 0) {\n+\t\t\t\tperror(\"clock_gettime() did not return success\\n\");\n+\t\t\t\treturn CHILDFAIL;\n+\t\t\t}\n+\n+\t\t\tif (tsT2.tv_sec >= tsT1.tv_sec) {\n+\t\t\t\tif ((tsT2.tv_sec - tsT1.tv_sec) <= ACCEPTABLEDELTA)\n+\t\t\t\t\treturn CHILDPASS;\n \n-\t\tif (tsT2.tv_sec >= tsT1.tv_sec) {\n-\t\t\tif ((tsT2.tv_sec - tsT1.tv_sec) <= ACCEPTABLEDELTA) {\n-\t\t\t\treturn CHILDPASS;\n-\t\t\t} else {\n \t\t\t\tprintf(\"Ended too late. %d >> %d\\n\",\n \t\t\t\t (int)tsT2.tv_sec, (int)tsT1.tv_sec);\n \t\t\t\treturn CHILDFAIL;\n \t\t\t}\n-\t\t} else {\n+\n \t\t\tprintf(\"Did not sleep for long enough %d < %d\\n\",\n \t\t\t (int)tsT2.tv_sec, (int)tsT1.tv_sec);\n \t\t\treturn CHILDFAIL;\n \t\t}\n \n-\t\treturn CHILDFAIL;\n-\t} else {\n \t\t/* parent here */\n-\t\tint i;\n-\t\tstruct timespec tsreset;\n-\n \t\tsleep(SMALLTIME);\n \n \t\tif (clock_settime(CLOCK_REALTIME, &tsT0) != 0) {\n@@ -95,22 +100,33 @@ int main(void)\n \t\t\treturn PTS_UNRESOLVED;\n \t\t}\n \n-\t\tif (wait(&i) == -1) {\n+\t\tif (wait(&child_status) == -1) {\n \t\t\tperror(\"Error waiting for child to exit\\n\");\n \t\t\treturn PTS_UNRESOLVED;\n \t\t}\n \n-\t\tgetBeforeTime(&tsreset);\t// get current time\n+\t\tgetBeforeTime(&tsreset);\n \t\ttsreset.tv_sec += SMALLTIME;\n \t\tsetBackTime(tsreset);\n-\t\tif (WIFEXITED(i) && WEXITSTATUS(i)) {\n-\t\t\tprintf(\"Test PASSED\\n\");\n-\t\t\treturn PTS_PASS;\n-\t\t} else {\n-\t\t\tprintf(\"Test FAILED\\n\");\n-\t\t\treturn PTS_FAIL;\n-\t\t}\n+\n+\t\tret = pts_mono_time_check(SMALLTIME + SLEEPOFFSET);\n+\t\tif (ret < 0)\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\tif (ret == 0)\n+\t\t\tbreak;\n+\t}\n+\n+\tif (attempt == PTS_MONO_MAX_RETRIES) {\n+\t\tprintf(\"UNTESTED: persistent clock interference after %d attempts\\n\",\n+\t\t PTS_MONO_MAX_RETRIES);\n+\t\treturn PTS_UNTESTED;\n+\t}\n+\n+\tif (WIFEXITED(child_status) && WEXITSTATUS(child_status)) {\n+\t\tprintf(\"Test PASSED\\n\");\n+\t\treturn PTS_PASS;\n \t}\n \n-\treturn PTS_UNRESOLVED;\n+\tprintf(\"Test FAILED\\n\");\n+\treturn PTS_FAIL;\n }\ndiff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-2.c b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-2.c\nindex 7c340b6c97ce03a1b04709f06996e5a66e1a653a..9a3a1e8678c95aef267f39995c85a35407699c6a 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-2.c\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/7-2.c\n@@ -31,11 +31,14 @@\n \n #define CHILDPASS 1\n #define CHILDFAIL 0\n+#define CHILDUNTESTED 2\n+#define CHILDUNRESOLVED 3\n \n int main(void)\n {\n-\tstruct timespec tsT0, tsT1, tsT2;\n-\tint pid;\n+\tstruct timespec tsT0, tsT1, tsT2, tsreset;\n+\tint pid, child_status;\n+\tint attempt, ret;\n \n \t/* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */\n \tif (getuid() != 0) {\n@@ -43,53 +46,70 @@ int main(void)\n \t\treturn PTS_UNTESTED;\n \t}\n \n-\tif (clock_gettime(CLOCK_REALTIME, &tsT0) != 0) {\n-\t\tperror(\"clock_gettime() did not return success\\n\");\n-\t\treturn PTS_UNRESOLVED;\n-\t}\n-\n-\ttsT1.tv_sec = tsT0.tv_sec + SLEEPOFFSET;\n-\ttsT1.tv_nsec = tsT0.tv_nsec;\n+\tfor (attempt = 0; attempt < PTS_MONO_MAX_RETRIES; attempt++) {\n+\t\tif (clock_gettime(CLOCK_REALTIME, &tsT0) != 0) {\n+\t\t\tperror(\"clock_gettime() did not return success\\n\");\n+\t\t\treturn PTS_UNRESOLVED;\n+\t\t}\n \n-\ttsT2.tv_sec = tsT1.tv_sec + SMALLTIME;\n-\ttsT2.tv_nsec = tsT1.tv_nsec;\n+\t\ttsT1.tv_sec = tsT0.tv_sec + SLEEPOFFSET;\n+\t\ttsT1.tv_nsec = tsT0.tv_nsec;\n \n-\tif ((pid = fork()) == 0) {\n-\t\t/* child here */\n-\t\tint flags = 0;\n-\t\tstruct timespec tsT3;\n+\t\ttsT2.tv_sec = tsT1.tv_sec + SMALLTIME;\n+\t\ttsT2.tv_nsec = tsT1.tv_nsec;\n \n-\t\tflags |= TIMER_ABSTIME;\n-\t\tif (clock_nanosleep(CLOCK_REALTIME, flags, &tsT1, NULL) != 0) {\n-\t\t\tprintf(\"clock_nanosleep() did not return success\\n\");\n-\t\t\treturn CHILDFAIL;\n+\t\tpid = fork();\n+\t\tif (pid < 0) {\n+\t\t\tperror(\"fork() failed\");\n+\t\t\treturn PTS_UNRESOLVED;\n \t\t}\n+\t\tif (pid == 0) {\n+\t\t\t/* child here */\n+\t\t\tint flags = 0;\n+\t\t\tstruct timespec tsT3;\n \n-\t\tif (clock_gettime(CLOCK_REALTIME, &tsT3) != 0) {\n-\t\t\tperror(\"clock_gettime() did not return success\\n\");\n-\t\t\treturn CHILDFAIL;\n-\t\t}\n+\t\t\tflags |= TIMER_ABSTIME;\n+\n+\t\t\tif (pts_mono_time_start() != 0)\n+\t\t\t\treturn CHILDUNRESOLVED;\n+\n+\t\t\tif (clock_nanosleep(CLOCK_REALTIME, flags, &tsT1, NULL) != 0) {\n+\t\t\t\tprintf(\"clock_nanosleep() did not return success\\n\");\n+\t\t\t\treturn CHILDFAIL;\n+\t\t\t}\n+\n+\t\t\t/*\n+\t\t\t * The parent sleeps 1s before jumping the clock forward.\n+\t\t\t * If clock_nanosleep returned too quickly, an external\n+\t\t\t * clock adjustment (NTP, VM sync) woke us instead of the\n+\t\t\t * parent's clock_settime.\n+\t\t\t */\n+\t\t\tret = pts_mono_time_check(1);\n+\t\t\tif (ret < 0)\n+\t\t\t\treturn CHILDUNRESOLVED;\n+\t\t\tif (ret > 0)\n+\t\t\t\treturn CHILDUNTESTED;\n+\n+\t\t\tif (clock_gettime(CLOCK_REALTIME, &tsT3) != 0) {\n+\t\t\t\tperror(\"clock_gettime() did not return success\\n\");\n+\t\t\t\treturn CHILDFAIL;\n+\t\t\t}\n+\n+\t\t\tif (tsT3.tv_sec >= tsT2.tv_sec) {\n+\t\t\t\tif ((tsT3.tv_sec - tsT2.tv_sec) <= ACCEPTABLEDELTA)\n+\t\t\t\t\treturn CHILDPASS;\n \n-\t\tif (tsT3.tv_sec >= tsT2.tv_sec) {\n-\t\t\tif ((tsT3.tv_sec - tsT2.tv_sec) <= ACCEPTABLEDELTA) {\n-\t\t\t\treturn CHILDPASS;\n-\t\t\t} else {\n \t\t\t\tprintf(\"Ended too late. %d >> %d\\n\",\n \t\t\t\t (int)tsT3.tv_sec, (int)tsT2.tv_sec);\n \t\t\t\treturn CHILDFAIL;\n \t\t\t}\n-\t\t} else {\n+\n \t\t\tprintf(\"Did not sleep for long enough %d < %d\\n\",\n \t\t\t (int)tsT3.tv_sec, (int)tsT2.tv_sec);\n \t\t\treturn CHILDFAIL;\n \t\t}\n \n-\t\treturn CHILDFAIL;\n-\t} else {\n \t\t/* parent here */\n-\t\tint i;\n-\t\tstruct timespec tsreset;\n-\n \t\tsleep(1);\n \n \t\tgetBeforeTime(&tsreset);\n@@ -98,21 +118,34 @@ int main(void)\n \t\t\treturn PTS_UNRESOLVED;\n \t\t}\n \n-\t\tif (wait(&i) == -1) {\n+\t\tif (wait(&child_status) == -1) {\n \t\t\tperror(\"Error waiting for child to exit\\n\");\n \t\t\treturn PTS_UNRESOLVED;\n \t\t}\n \n-\t\tsetBackTime(tsreset);\t//should be ~= before time\n+\t\tsetBackTime(tsreset);\n \n-\t\tif (WIFEXITED(i) && WEXITSTATUS(i)) {\n-\t\t\tprintf(\"Test PASSED\\n\");\n-\t\t\treturn PTS_PASS;\n-\t\t} else {\n-\t\t\tprintf(\"Test FAILED\\n\");\n-\t\t\treturn PTS_FAIL;\n-\t\t}\n+\t\tif (!WIFEXITED(child_status))\n+\t\t\tbreak;\n+\n+\t\tif (WEXITSTATUS(child_status) == CHILDUNRESOLVED)\n+\t\t\treturn PTS_UNRESOLVED;\n+\n+\t\tif (WEXITSTATUS(child_status) != CHILDUNTESTED)\n+\t\t\tbreak;\n+\t}\n+\n+\tif (attempt == PTS_MONO_MAX_RETRIES) {\n+\t\tprintf(\"UNTESTED: persistent clock interference after %d attempts\\n\",\n+\t\t PTS_MONO_MAX_RETRIES);\n+\t\treturn PTS_UNTESTED;\n+\t}\n+\n+\tif (WIFEXITED(child_status) && WEXITSTATUS(child_status) == CHILDPASS) {\n+\t\tprintf(\"Test PASSED\\n\");\n+\t\treturn PTS_PASS;\n \t}\n \n-\treturn PTS_UNRESOLVED;\n+\tprintf(\"Test FAILED\\n\");\n+\treturn PTS_FAIL;\n }\ndiff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/helpers.h b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/helpers.h\nindex 133a579afa893e90d896d68fc92a93e21ef84efc..37bf30926f039553e9e370751b7938ca5ea1d00a 100644\n--- a/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/helpers.h\n+++ b/testcases/open_posix_testsuite/conformance/interfaces/clock_settime/helpers.h\n@@ -12,6 +12,9 @@\n * in certain tests, they make use of some libraries already included\n * by those tests.\n */\n+\n+#include <stdlib.h>\n+\n static int getBeforeTime(struct timespec *tpget)\n {\n \tif (clock_gettime(CLOCK_REALTIME, tpget) != 0) {\n@@ -32,3 +35,55 @@ static int setBackTime(struct timespec tpset)\n \treturn PTS_PASS;\n }\n \n+#define PTS_MONO_MAX_RETRIES 3\n+\n+#ifdef _POSIX_MONOTONIC_CLOCK\n+static struct timespec _pts_mono_start;\n+\n+static inline int pts_mono_time_start(void)\n+{\n+\tif (clock_gettime(CLOCK_MONOTONIC, &_pts_mono_start) != 0) {\n+\t\tperror(\"clock_gettime(CLOCK_MONOTONIC) failed\");\n+\t\treturn -1;\n+\t}\n+\treturn 0;\n+}\n+\n+static inline int pts_mono_time_check(unsigned int expected_secs)\n+{\n+\tstruct timespec now;\n+\tlong elapsed;\n+\n+\tif (clock_gettime(CLOCK_MONOTONIC, &now) != 0) {\n+\t\tperror(\"clock_gettime(CLOCK_MONOTONIC) failed\");\n+\t\treturn -1;\n+\t}\n+\n+\telapsed = now.tv_sec - _pts_mono_start.tv_sec;\n+\n+\tif (labs(elapsed - (long)expected_secs) > 1) {\n+\t\tprintf(\"Clock adjustment detected (elapsed %lds, expected ~%us)\\n\",\n+\t\t elapsed, expected_secs);\n+\t\treturn 1;\n+\t}\n+\treturn 0;\n+}\n+#else\n+static inline int pts_mono_time_start(void)\n+{\n+\tstatic int warned;\n+\n+\tif (!warned) {\n+\t\tprintf(\"CLOCK_MONOTONIC unavailable, test may fail due to clock adjustment\\n\");\n+\t\twarned = 1;\n+\t}\n+\treturn 0;\n+}\n+\n+static inline int pts_mono_time_check(unsigned int expected_secs)\n+{\n+\t(void)expected_secs;\n+\treturn 0;\n+}\n+#endif\n+\n", "prefixes": [ "v4" ] }