Replace the fixed-size log buffer with a string_stream so that the log can grow as lines are added.
The existing kunit log tests have been updated for using a string_stream as the log. As they now depend on string_stream functions they cannot build when kunit-test is a module. They have been moved to a separate source file to be built only if kunit-test is built-in.
Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com --- include/kunit/test.h | 14 ++++---- lib/kunit/Makefile | 5 +-- lib/kunit/debugfs.c | 36 +++++++++++++-------- lib/kunit/kunit-test.c | 52 +----------------------------- lib/kunit/log-test.c | 72 ++++++++++++++++++++++++++++++++++++++++++ lib/kunit/test.c | 44 +++----------------------- 6 files changed, 110 insertions(+), 113 deletions(-) create mode 100644 lib/kunit/log-test.c
diff --git a/include/kunit/test.h b/include/kunit/test.h index d33114097d0d..b915a0fe93c0 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -32,9 +32,7 @@ DECLARE_STATIC_KEY_FALSE(kunit_running);
struct kunit; - -/* Size of log associated with test. */ -#define KUNIT_LOG_SIZE 2048 +struct string_stream;
/* Maximum size of parameter description string. */ #define KUNIT_PARAM_DESC_SIZE 128 @@ -132,7 +130,7 @@ struct kunit_case { /* private: internal use only. */ enum kunit_status status; char *module_name; - char *log; + struct string_stream *log; };
static inline char *kunit_status_to_ok_not_ok(enum kunit_status status) @@ -252,7 +250,7 @@ struct kunit_suite { /* private: internal use only */ char status_comment[KUNIT_STATUS_COMMENT_SIZE]; struct dentry *debugfs; - char *log; + struct string_stream *log; int suite_init_err; };
@@ -278,7 +276,7 @@ struct kunit {
/* private: internal use only. */ const char *name; /* Read only after initialization! */ - char *log; /* Points at case log after initialization */ + struct string_stream *log; /* Points at case log after initialization */ struct kunit_try_catch try_catch; /* param_value is the current parameter value for a test case. */ const void *param_value; @@ -314,7 +312,7 @@ const char *kunit_filter_glob(void); char *kunit_filter(void); char *kunit_filter_action(void);
-void kunit_init_test(struct kunit *test, const char *name, char *log); +void kunit_init_test(struct kunit *test, const char *name, struct string_stream *log);
int kunit_run_tests(struct kunit_suite *suite);
@@ -472,7 +470,7 @@ static inline void *kunit_kcalloc(struct kunit *test, size_t n, size_t size, gfp
void kunit_cleanup(struct kunit *test);
-void __printf(2, 3) kunit_log_append(char *log, const char *fmt, ...); +void __printf(2, 3) kunit_log_append(struct string_stream *log, const char *fmt, ...);
/** * kunit_mark_skipped() - Marks @test_or_suite as skipped diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 46f75f23dfe4..65735c2e1d14 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -18,9 +18,10 @@ obj-y += hooks.o
obj-$(CONFIG_KUNIT_TEST) += kunit-test.o
-# string-stream-test compiles built-in only. +# string-stream-test and log-test compiles built-in only. ifeq ($(CONFIG_KUNIT_TEST),y) -obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o +obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o \ + log-test.o endif
obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += kunit-example-test.o diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c index 22c5c496a68f..ab53a7e5c898 100644 --- a/lib/kunit/debugfs.c +++ b/lib/kunit/debugfs.c @@ -37,14 +37,21 @@ void kunit_debugfs_init(void) debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL); }
-static void debugfs_print_result(struct seq_file *seq, - struct kunit_suite *suite, - struct kunit_case *test_case) +static void debugfs_print_result(struct seq_file *seq, struct string_stream *log) { - if (!test_case || !test_case->log) + struct string_stream_fragment *frag_container; + + if (!log) return;
- seq_printf(seq, "%s", test_case->log); + /* + * Walk the fragments so we don't need to allocate a temporary + * buffer to hold the entire string. + */ + spin_lock(&log->lock); + list_for_each_entry(frag_container, &log->fragments, node) + seq_printf(seq, "%s", frag_container->fragment); + spin_unlock(&log->lock); }
/* @@ -69,10 +76,9 @@ static int debugfs_print_results(struct seq_file *seq, void *v) seq_printf(seq, KUNIT_SUBTEST_INDENT "1..%zd\n", kunit_suite_num_test_cases(suite));
kunit_suite_for_each_test_case(suite, test_case) - debugfs_print_result(seq, suite, test_case); + debugfs_print_result(seq, test_case->log);
- if (suite->log) - seq_printf(seq, "%s", suite->log); + debugfs_print_result(seq, suite->log);
seq_printf(seq, "%s %d %s\n", kunit_status_to_ok_not_ok(success), 1, suite->name); @@ -105,9 +111,13 @@ void kunit_debugfs_create_suite(struct kunit_suite *suite) struct kunit_case *test_case;
/* Allocate logs before creating debugfs representation. */ - suite->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL); - kunit_suite_for_each_test_case(suite, test_case) - test_case->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL); + suite->log = raw_alloc_string_stream(GFP_KERNEL); + string_stream_set_append_newlines(suite->log, true); + + kunit_suite_for_each_test_case(suite, test_case) { + test_case->log = raw_alloc_string_stream(GFP_KERNEL); + string_stream_set_append_newlines(test_case->log, true); + }
suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir);
@@ -121,7 +131,7 @@ void kunit_debugfs_destroy_suite(struct kunit_suite *suite) struct kunit_case *test_case;
debugfs_remove_recursive(suite->debugfs); - kfree(suite->log); + raw_free_string_stream(suite->log); kunit_suite_for_each_test_case(suite, test_case) - kfree(test_case->log); + raw_free_string_stream(test_case->log); } diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c index 83d8e90ca7a2..ecc39d5f7411 100644 --- a/lib/kunit/kunit-test.c +++ b/lib/kunit/kunit-test.c @@ -530,55 +530,6 @@ static struct kunit_suite kunit_resource_test_suite = { .test_cases = kunit_resource_test_cases, };
-static void kunit_log_test(struct kunit *test) -{ - struct kunit_suite suite; - - suite.log = kunit_kzalloc(test, KUNIT_LOG_SIZE, GFP_KERNEL); - KUNIT_ASSERT_NOT_ERR_OR_NULL(test, suite.log); - - kunit_log(KERN_INFO, test, "put this in log."); - kunit_log(KERN_INFO, test, "this too."); - kunit_log(KERN_INFO, &suite, "add to suite log."); - kunit_log(KERN_INFO, &suite, "along with this."); - -#ifdef CONFIG_KUNIT_DEBUGFS - KUNIT_EXPECT_NOT_ERR_OR_NULL(test, - strstr(test->log, "put this in log.")); - KUNIT_EXPECT_NOT_ERR_OR_NULL(test, - strstr(test->log, "this too.")); - KUNIT_EXPECT_NOT_ERR_OR_NULL(test, - strstr(suite.log, "add to suite log.")); - KUNIT_EXPECT_NOT_ERR_OR_NULL(test, - strstr(suite.log, "along with this.")); -#else - KUNIT_EXPECT_NULL(test, test->log); -#endif -} - -static void kunit_log_newline_test(struct kunit *test) -{ - kunit_info(test, "Add newline\n"); - if (test->log) { - KUNIT_ASSERT_NOT_NULL_MSG(test, strstr(test->log, "Add newline\n"), - "Missing log line, full log:\n%s", test->log); - KUNIT_EXPECT_NULL(test, strstr(test->log, "Add newline\n\n")); - } else { - kunit_skip(test, "only useful when debugfs is enabled"); - } -} - -static struct kunit_case kunit_log_test_cases[] = { - KUNIT_CASE(kunit_log_test), - KUNIT_CASE(kunit_log_newline_test), - {} -}; - -static struct kunit_suite kunit_log_test_suite = { - .name = "kunit-log-test", - .test_cases = kunit_log_test_cases, -}; - static void kunit_status_set_failure_test(struct kunit *test) { struct kunit fake; @@ -658,7 +609,6 @@ static struct kunit_suite kunit_current_test_suite = { };
kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite, - &kunit_log_test_suite, &kunit_status_test_suite, - &kunit_current_test_suite); + &kunit_status_test_suite, &kunit_current_test_suite);
MODULE_LICENSE("GPL v2"); diff --git a/lib/kunit/log-test.c b/lib/kunit/log-test.c new file mode 100644 index 000000000000..a93d87112fea --- /dev/null +++ b/lib/kunit/log-test.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for logging. + * + * Based on code: + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ +#include <kunit/test.h> + +#include "string-stream.h" + +static void kunit_log_test(struct kunit *test) +{ + struct kunit_suite suite; + char *full_log; + + suite.log = alloc_string_stream(test, GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, suite.log); + string_stream_set_append_newlines(suite.log, true); + + kunit_log(KERN_INFO, test, "put this in log."); + kunit_log(KERN_INFO, test, "this too."); + kunit_log(KERN_INFO, &suite, "add to suite log."); + kunit_log(KERN_INFO, &suite, "along with this."); + +#ifdef CONFIG_KUNIT_DEBUGFS + KUNIT_EXPECT_TRUE(test, test->log->append_newlines); + + full_log = string_stream_get_string(test, test->log, GFP_KERNEL); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, + strstr(full_log, "put this in log.")); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, + strstr(full_log, "this too.")); + + full_log = string_stream_get_string(test, suite.log, GFP_KERNEL); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, + strstr(full_log, "add to suite log.")); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, + strstr(full_log, "along with this.")); +#else + KUNIT_EXPECT_NULL(test, test->log); +#endif +} + +static void kunit_log_newline_test(struct kunit *test) +{ + char *full_log; + + kunit_info(test, "Add newline\n"); + if (test->log) { + full_log = string_stream_get_string(test, test->log, GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL_MSG(test, strstr(full_log, "Add newline\n"), + "Missing log line, full log:\n%s", full_log); + KUNIT_EXPECT_NULL(test, strstr(full_log, "Add newline\n\n")); + } else { + kunit_skip(test, "only useful when debugfs is enabled"); + } +} + +static struct kunit_case kunit_log_test_cases[] = { + KUNIT_CASE(kunit_log_test), + KUNIT_CASE(kunit_log_newline_test), + {} +}; + +static struct kunit_suite kunit_log_test_suite = { + .name = "kunit-log-test", + .test_cases = kunit_log_test_cases, +}; + +kunit_test_suites(&kunit_log_test_suite); diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 4b69d12dfc96..14e889e80129 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -109,51 +109,17 @@ static void kunit_print_test_stats(struct kunit *test, stats.total); }
-/** - * kunit_log_newline() - Add newline to the end of log if one is not - * already present. - * @log: The log to add the newline to. - */ -static void kunit_log_newline(char *log) -{ - int log_len, len_left; - - log_len = strlen(log); - len_left = KUNIT_LOG_SIZE - log_len - 1; - - if (log_len > 0 && log[log_len - 1] != '\n') - strncat(log, "\n", len_left); -} - -/* - * Append formatted message to log, size of which is limited to - * KUNIT_LOG_SIZE bytes (including null terminating byte). - */ -void kunit_log_append(char *log, const char *fmt, ...) +/* Append formatted message to log. */ +void kunit_log_append(struct string_stream *log, const char *fmt, ...) { va_list args; - int len, log_len, len_left;
if (!log) return;
- log_len = strlen(log); - len_left = KUNIT_LOG_SIZE - log_len - 1; - if (len_left <= 0) - return; - - /* Evaluate length of line to add to log */ va_start(args, fmt); - len = vsnprintf(NULL, 0, fmt, args) + 1; + string_stream_vadd(log, fmt, args); va_end(args); - - /* Print formatted line to the log */ - va_start(args, fmt); - vsnprintf(log + log_len, min(len, len_left), fmt, args); - va_end(args); - - /* Add newline to end of log if not already present. */ - kunit_log_newline(log); } EXPORT_SYMBOL_GPL(kunit_log_append);
@@ -359,14 +325,14 @@ void __kunit_do_failed_assertion(struct kunit *test, } EXPORT_SYMBOL_GPL(__kunit_do_failed_assertion);
-void kunit_init_test(struct kunit *test, const char *name, char *log) +void kunit_init_test(struct kunit *test, const char *name, struct string_stream *log) { spin_lock_init(&test->lock); INIT_LIST_HEAD(&test->resources); test->name = name; test->log = log; if (test->log) - test->log[0] = '\0'; + string_stream_clear(log); test->status = KUNIT_SUCCESS; test->status_comment[0] = '\0'; }