{"id":2218041,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2218041/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/patch/20260331100138.58202-1-lufei@uniontech.com/","project":{"id":59,"url":"http://patchwork.ozlabs.org/api/1.2/projects/59/?format=json","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":"<20260331100138.58202-1-lufei@uniontech.com>","list_archive_url":null,"date":"2026-03-31T10:01:38","name":"[v4] Rewrite ftrace_regression tests with new C API","commit_ref":null,"pull_url":null,"state":"needs-review-ack","archived":false,"hash":"491ca893713c64bf277be3ee628be8807e3b75de","submitter":{"id":88121,"url":"http://patchwork.ozlabs.org/api/1.2/people/88121/?format=json","name":"lufei","email":"lufei@uniontech.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/ltp/patch/20260331100138.58202-1-lufei@uniontech.com/mbox/","series":[{"id":498165,"url":"http://patchwork.ozlabs.org/api/1.2/series/498165/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/list/?series=498165","date":"2026-03-31T10:01:38","name":"[v4] Rewrite ftrace_regression tests with new C API","version":4,"mbox":"http://patchwork.ozlabs.org/series/498165/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2218041/comments/","check":"warning","checks":"http://patchwork.ozlabs.org/api/patches/2218041/checks/","tags":{},"related":[],"headers":{"Return-Path":"","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=uniontech.com header.i=@uniontech.com\n header.a=rsa-sha256 header.s=onoh2408 header.b=OLaleyDB;\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; helo=picard.linux.it;\n envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it;\n receiver=patchwork.ozlabs.org)"],"Received":["from picard.linux.it (picard.linux.it 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+0800","Message-Id":"<20260331100138.58202-1-lufei@uniontech.com>","X-Mailer":"git-send-email 2.39.3","In-Reply-To":"<20260331015538.53326-1-lufei@uniontech.com>","References":"<20260331015538.53326-1-lufei@uniontech.com>","MIME-Version":"1.0","X-QQ-SENDSIZE":"520","Feedback-ID":"zesmtpsz:uniontech.com:qybglogicsvrgz:qybglogicsvrgz3a-1","X-QQ-XMAILINFO":"NWLpwLZrMWrI3jeNjqtsyDDP69veXFHyKgaJoW9wSRNMgHc2SwBbmaTU\n aLvXzciHaLniJ/9w+br22SzEeER8YR6PZHnqHdPRbGrXPfFaHJdOAj7WnlsSPRyds8OH7O0\n r7qg+D47OrvUiFjm3CVf4fI+i5uAaC7qgPQdhuO2fEZPw+YH35ksw+wcNV2R/4FONOYFUqu\n zxhH7qOGiC3ofjzvMqeZEpAE7phwjiSq9K+tQm8pA5QWbhqdAyXS65d8TctyjLOlYsyBovj\n +YxOWaMKJR9VOY2K69nrAYvkD0AGW2nlyW9nmLp2fW5x+UCDiaMFJ2VCt8x8jaipwWQVY1s\n SBt0AgVF4r6ZA8qy2sONxQW66Vk89kGLrwPZd0vyvHsaaSHzNXIEnYNM5pHKZOQPJQPcmEU\n v2VJ0Yf9chZgSIMTkcsd0Ra0fhDHCmg9/GE6t2V3KroYVM4L9Ja5XzaqV+abFf7cILdtXwO\n UfWPKI4CJM3ZEHf+W9/P6vP482HyH/j3Jyf5INDD4sUkQJomc6PtwwzKcA4HLNt3FBMZI1u\n 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in-7.smtp.seeweb.it","X-Virus-Status":"Clean","Subject":"[LTP] [PATCH v4] Rewrite ftrace_regression tests with new C API","X-BeenThere":"ltp@lists.linux.it","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"Linux Test Project ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Cc":"lufei ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "},"content":"Rewritten from old shell scripts.\n\nftrace_regression01: regression test for panic bug while using\nuserstacktrace, set userstacktrace in loop and check if success.\n\nftrace_regression02: for checking signal:signal_generate gives\n2 more fields: grp res.\n\nSigned-off-by: lufei \n---\n runtest/tracing | 4 +-\n .../kernel/tracing/ftrace_test/.gitignore | 2 +\n .../tracing/ftrace_test/ftrace_regression.h | 61 ++++++++++++++\n .../tracing/ftrace_test/ftrace_regression01.c | 82 ++++++++++++++++++\n .../ftrace_test/ftrace_regression01.sh | 83 -------------------\n .../tracing/ftrace_test/ftrace_regression02.c | 56 +++++++++++++\n .../ftrace_test/ftrace_regression02.sh | 63 --------------\n 7 files changed, 203 insertions(+), 148 deletions(-)\n create mode 100644 testcases/kernel/tracing/ftrace_test/.gitignore\n create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression.h\n create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression01.c\n delete mode 100755 testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh\n create mode 100644 testcases/kernel/tracing/ftrace_test/ftrace_regression02.c\n delete mode 100755 testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh","diff":"diff --git a/runtest/tracing b/runtest/tracing\nindex 674e2ad97..2a4a92c5f 100644\n--- a/runtest/tracing\n+++ b/runtest/tracing\n@@ -1,6 +1,6 @@\n #DESCRIPTION:Tracing testing\n-ftrace_regression01\tftrace_regression01.sh\n-ftrace_regression02\tftrace_regression02.sh\n+ftrace_regression01\tftrace_regression01\n+ftrace_regression02\tftrace_regression02\n ftrace-stress-test\tftrace_stress_test.sh 90\n dynamic_debug01\t\tdynamic_debug01.sh\n fanotify25 fanotify25\ndiff --git a/testcases/kernel/tracing/ftrace_test/.gitignore b/testcases/kernel/tracing/ftrace_test/.gitignore\nnew file mode 100644\nindex 000000000..b0153e9fa\n--- /dev/null\n+++ b/testcases/kernel/tracing/ftrace_test/.gitignore\n@@ -0,0 +1,2 @@\n+ftrace_regression01\n+ftrace_regression02\ndiff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression.h b/testcases/kernel/tracing/ftrace_test/ftrace_regression.h\nnew file mode 100644\nindex 000000000..0efae7268\n--- /dev/null\n+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression.h\n@@ -0,0 +1,61 @@\n+/* SPDX-License-Identifier: GPL-2.0-or-later\n+ *\n+ * Copyright (c) 2026 lufei \n+ *\n+ * Shared header for ftrace regression tests.\n+ */\n+\n+#ifndef FTRACE_REGRESSION_H\n+#define FTRACE_REGRESSION_H\n+\n+#include \"tst_test.h\"\n+#include \"tst_safe_file_ops.h\"\n+#include \"tst_safe_stdio.h\"\n+\n+#include \n+#include \n+\n+#define FTRACE_LINE_BUF_SIZE 1024\n+#define DEBUGFS_DIR \"debugfs\"\n+\n+/**\n+ * file_contains - Check if a file contains specific regex pattern.\n+ */\n+static inline int file_contains(const char *path, const char *pattern)\n+{\n+\tFILE *fp = SAFE_FOPEN(path, \"r\");\n+\tchar *buf = SAFE_MALLOC(FTRACE_LINE_BUF_SIZE);\n+\tbool found = false;\n+\n+\tregex_t re;\n+\n+\tif (regcomp(&re, pattern, REG_EXTENDED | REG_NOSUB) != 0) {\n+\t\tSAFE_FCLOSE(fp);\n+\t\treturn found;\n+\t}\n+\n+\twhile (fgets(buf, FTRACE_LINE_BUF_SIZE, fp)) {\n+\t\tif (regexec(&re, buf, 0, NULL, 0) == 0) {\n+\t\t\tfound = true;\n+\t\t\tbreak;\n+\t\t}\n+\t}\n+\n+\tregfree(&re);\n+\tSAFE_FCLOSE(fp);\n+\tfree(buf);\n+\treturn found;\n+}\n+\n+static inline void mount_debugfs(void)\n+{\n+\tSAFE_MKDIR(DEBUGFS_DIR, 0755);\n+\tSAFE_MOUNT(NULL, DEBUGFS_DIR, \"debugfs\", 0, NULL);\n+}\n+\n+static inline void umount_debugfs(void)\n+{\n+\tSAFE_UMOUNT(DEBUGFS_DIR);\n+}\n+\n+#endif /* FTRACE_REGRESSION_H */\ndiff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c\nnew file mode 100644\nindex 000000000..be2327582\n--- /dev/null\n+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.c\n@@ -0,0 +1,82 @@\n+// SPDX-License-Identifier: GPL-2.0-or-later\n+/*\n+ * Copyright (c) 2015 Red Hat Inc.\n+ * Copyright (c) 2026 lufei \n+ */\n+\n+/*\\\n+ * Regression test for panic while using userstacktrace.\n+ *\n+ * BUG: unable to handle kernel paging request at 00000000417683c0\n+ * IP: [] update_curr+0x124/0x1e0\n+ * Thread overran stack, or stack corrupted\n+ * Oops: 0000 [#1] SMP\n+ * last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map\n+ *\n+ * The bug was fixed by:\n+ * 1dbd195 (tracing: Fix preempt count leak)\n+ */\n+\n+#include \n+#include \"ftrace_regression.h\"\n+\n+#define STACK_TRACER_PATH \"/proc/sys/kernel/stack_tracer_enabled\"\n+#define TRACE_OPTIONS DEBUGFS_DIR \"/tracing/trace_options\"\n+#define EXC_PAGE_FAULT DEBUGFS_DIR \"/tracing/events/exceptions/page_fault_kernel/enable\"\n+#define MM_PAGE_FAULT DEBUGFS_DIR \"/tracing/events/kmem/mm_kernel_pagefault/enable\"\n+\n+#define LOOP 10\n+\n+static const char *page_fault_path;\n+static int page_fault_origin;\n+\n+static void setup(void)\n+{\n+\tmount_debugfs();\n+\n+\tif (access(EXC_PAGE_FAULT, F_OK) == 0)\n+\t\tpage_fault_path = EXC_PAGE_FAULT;\n+\telse if (access(MM_PAGE_FAULT, F_OK) == 0)\n+\t\tpage_fault_path = MM_PAGE_FAULT;\n+\telse\n+\t\ttst_brk(TCONF, \"Page fault event not available\");\n+\n+\tSAFE_FILE_SCANF(page_fault_path, \"%d\", &page_fault_origin);\n+}\n+\n+static void run(void)\n+{\n+\tint i;\n+\n+\tfor (i = 0; i < LOOP; i++) {\n+\t\tSAFE_FILE_PRINTF(STACK_TRACER_PATH, \"1\");\n+\t\tSAFE_FILE_PRINTF(TRACE_OPTIONS, \"userstacktrace\");\n+\n+\t\tif (!file_contains(TRACE_OPTIONS, \"^userstacktrace\"))\n+\t\t\ttst_brk(TBROK, \"Failed to set userstacktrace\");\n+\n+\t\tSAFE_FILE_PRINTF(page_fault_path, \"1\");\n+\t}\n+\n+\tSAFE_FILE_PRINTF(page_fault_path, \"%d\", page_fault_origin);\n+\n+\ttst_res(TPASS, \"Test passed for setting userstacktrace \"\n+\t\t\t\"bug(preempt count leak) not reproduced\"\n+\t\t\t);\n+}\n+\n+static struct tst_test test = {\n+\t.needs_root = 1,\n+\t.needs_tmpdir = 1,\n+\t.setup = setup,\n+\t.test_all = run,\n+\t.cleanup = umount_debugfs,\n+\t.save_restore = (const struct tst_path_val[]) {\n+\t\t{STACK_TRACER_PATH, NULL, TST_SR_TCONF},\n+\t\t{}\n+\t},\n+\t.tags = (const struct tst_tag[]) {\n+\t\t{\"linux-git\", \"1dbd1951f39e\"},\n+\t\t{}\n+\t},\n+};\ndiff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh b/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh\ndeleted file mode 100755\nindex d6969cfc6..000000000\n--- a/testcases/kernel/tracing/ftrace_test/ftrace_regression01.sh\n+++ /dev/null\n@@ -1,83 +0,0 @@\n-#! /bin/sh\n-\n-###########################################################################\n-## ##\n-## Copyright (c) 2015, Red Hat Inc. ##\n-## ##\n-## This program is free software: you can redistribute it and/or modify ##\n-## it under the terms of the GNU General Public License as published by ##\n-## the Free Software Foundation, either version 3 of the License, or ##\n-## (at your option) any later version. ##\n-## ##\n-## This program is distributed in the hope that it will be useful, ##\n-## but WITHOUT ANY WARRANTY; without even the implied warranty of ##\n-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ##\n-## GNU General Public License for more details. ##\n-## ##\n-## You should have received a copy of the GNU General Public License ##\n-## along with this program. If not, see . ##\n-## ##\n-## Author: Li Wang ##\n-## ##\n-###########################################################################\n-## ##\n-## Summary: panic while using userstacktrace ##\n-## ##\n-## BUG: unable to handle kernel paging request at 00000000417683c0 ##\n-## IP: [] update_curr+0x124/0x1e0 ##\n-## PGD 41a796067 PUD 0 ##\n-## Thread overran stack, or stack corrupted ##\n-## Oops: 0000 [#1] SMP ##\n-## last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map ##\n-## ##\n-## The bug was fixed by: ##\n-## 1dbd195 (tracing: Fix preempt count leak) ##\n-## ##\n-###########################################################################\n-\n-export TCID=\"ftrace_regression01\"\n-export TST_TOTAL=1\n-\n-. ftrace_lib.sh\n-\n-LOOP=10\n-\n-TSTACK_TRACE_PATH=\"/proc/sys/kernel/stack_tracer_enabled\"\n-EXC_PAGE_FAULT_ENABLE=\"$TRACING_PATH/events/exceptions/page_fault_kernel/enable\"\n-MM_PAGE_FAULT_ENABLE=\"$TRACING_PATH/events/kmem/mm_kernel_pagefault/enable\"\n-\n-ftrace_userstacktrace_test()\n-{\n-\tif [ ! -e \"$TSTACK_TRACE_PATH\" ]; then\n-\t\ttst_brkm TCONF \"Stack Tracer is not cofigured in This kernel\"\n-\tfi\n-\n-\tfor i in $(seq $LOOP); do\n-\t\techo 1 > $TSTACK_TRACE_PATH\n-\t\techo userstacktrace > $TRACING_PATH/trace_options\n-\t\tgrep -q \"^userstacktrace\" $TRACING_PATH/trace_options\n-\t\tif [ $? -ne 0 ]; then\n-\t\t\ttst_brkm TBROK \"Failed to set userstacktrace\"\n-\t\tfi\n-\n-\t\tif [ -f \"$EXC_PAGE_FAULT_ENABLE\" ]; then\n-\t\t\texc_page_fault_enable=`cat $EXC_PAGE_FAULT_ENABLE`\n-\t\t\techo 1 > $EXC_PAGE_FAULT_ENABLE\n-\t\telse\n-\t\t\tmm_page_fault_enable=`cat $MM_PAGE_FAULT_ENABLE`\n-\t\t\techo 1 > $MM_PAGE_FAULT_ENABLE\n-\t\tfi\n-\tdone\n-\n-\tif [ -f \"$EXC_PAGE_FAULT_ENABLE\" ]; then\n-\t\techo \"$exc_page_fault_enable\" > $EXC_PAGE_FAULT_ENABLE\n-\telse\n-\t\techo \"$mm_page_fault_enable\" > $MM_PAGE_FAULT_ENABLE\n-\tfi\n-\n-\ttst_resm TPASS \"Finished running the test\"\n-}\n-\n-ftrace_userstacktrace_test\n-\n-tst_exit\ndiff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c\nnew file mode 100644\nindex 000000000..b4aac7ad0\n--- /dev/null\n+++ b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.c\n@@ -0,0 +1,56 @@\n+// SPDX-License-Identifier: GPL-2.0-or-later\n+/*\n+ * Copyright (c) 2015 Red Hat Inc.\n+ * Copyright (c) 2026 lufei \n+ */\n+\n+/*\\\n+ * Check signal:signal_generate gives 2 more fields: grp=[0-9] res=[0-9]\n+ */\n+\n+#include \"ftrace_regression.h\"\n+\n+#define SET_EVENT DEBUGFS_DIR \"/tracing/set_event\"\n+#define TRACING_ON DEBUGFS_DIR \"/tracing/tracing_on\"\n+#define TRACE_FILE DEBUGFS_DIR \"/tracing/trace\"\n+\n+#define LOOP 100\n+\n+static void run(void)\n+{\n+\tint i;\n+\tconst char *const cmd_ls[] = {\"ls\", \"-l\", \"/proc\", NULL};\n+\n+\tSAFE_FILE_PRINTF(SET_EVENT, \"signal:signal_generate\");\n+\tSAFE_FILE_PRINTF(TRACING_ON, \"1\");\n+\tSAFE_FILE_PRINTF(TRACE_FILE, \"\\n\");\n+\n+\t// to generate trace\n+\tfor (i = 0; i < LOOP; i++)\n+\t\tSAFE_CMD(cmd_ls, \"/dev/null\", \"/dev/null\");\n+\n+\tif (file_contains(TRACE_FILE, \"grp=[0-9]\") &&\n+\t\t\tfile_contains(TRACE_FILE, \"res=[0-9]\"))\n+\t\ttst_res(TPASS, \"Pattern grp=[0-9] res=[0-9] reported after \"\n+\t\t\t \"setting signal:signal_generate\");\n+\telse\n+\t\ttst_res(TFAIL, \"Pattern grp=[0-9] res=[0-9] not found in trace\");\n+}\n+\n+static struct tst_test test = {\n+\t.needs_root = 1,\n+\t.needs_tmpdir = 1,\n+\t.setup = mount_debugfs,\n+\t.test_all = run,\n+\t.cleanup = umount_debugfs,\n+\t.needs_cmds = (struct tst_cmd[]) {\n+\t\t{.cmd = \"ls\"},\n+\t\t{}\n+\t},\n+\t.tags = (const struct tst_tag[]) {\n+\t\t{\"linux-git\", \"6c303d3ab39f\"},\n+\t\t{\"linux-git\", \"163566f60bfe\"},\n+\t\t{}\n+\t},\n+};\n+\ndiff --git a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh b/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh\ndeleted file mode 100755\nindex 3c32f219e..000000000\n--- a/testcases/kernel/tracing/ftrace_test/ftrace_regression02.sh\n+++ /dev/null\n@@ -1,63 +0,0 @@\n-#! /bin/sh\n-\n-###########################################################################\n-## ##\n-## Copyright (c) 2015, Red Hat Inc. ##\n-## ##\n-## This program is free software: you can redistribute it and/or modify ##\n-## it under the terms of the GNU General Public License as published by ##\n-## the Free Software Foundation, either version 3 of the License, or ##\n-## (at your option) any later version. ##\n-## ##\n-## This program is distributed in the hope that it will be useful, ##\n-## but WITHOUT ANY WARRANTY; without even the implied warranty of ##\n-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ##\n-## GNU General Public License for more details. ##\n-## ##\n-## You should have received a copy of the GNU General Public License ##\n-## along with this program. If not, see . ##\n-## ##\n-## Author: Li Wang ##\n-## ##\n-###########################################################################\n-## ##\n-## Summary: check signal:signal_generate gives 2 more fields: grp res ##\n-## ##\n-## This testcase is writing for signal events change: ##\n-## 6c303d3 tracing: let trace_signal_generate() report more info...##\n-## 163566f tracing: send_sigqueue() needs trace_signal_generate() ##\n-## ##\n-###########################################################################\n-\n-export TCID=\"ftrace_regression02\"\n-export TST_TOTAL=1\n-\n-. ftrace_lib.sh\n-\n-ftrace_signal_test()\n-{\n-\t# Set envent\n-\techo 'signal:signal_generate' > $TRACING_PATH/set_event\n-\techo 1 > $TRACING_PATH/tracing_on\n-\techo > $TRACING_PATH/trace\n-\n-\t# just to generate trace\n-\tfor i in $(seq 100); do\n-\t\tls -l /proc > /dev/null 2>&1\n-\tdone\n-\n-\tgrep -q 'grp=[0-9] res=[0-9]' $TRACING_PATH/trace\n-\tif [ $? -eq 0 ]; then\n-\t\ttst_resm TPASS \"finished running the test.\"\n-\telse\n-\t\ttst_resm TFAIL \"running the test failed, please check log message.\"\n-\tfi\n-}\n-\n-if tst_kvcmp -lt \"3.2\"; then\n-\ttst_brkm TCONF \"The test should be run in kernels >= 3.2.0 Skip the test...\"\n-fi\n-\n-ftrace_signal_test\n-\n-tst_exit\n","prefixes":["v4"]}