[PATCH v3 2/2] log: Convert log values to printf() if not enabled
Simon Glass
sjg at chromium.org
Sat May 8 17:30:43 CEST 2021
At present if logging not enabled, log_info() becomes a nop. But we want
log output at the 'info' level to be akin to printf(). Update the macro to
pass the output straight to printf() in this case.
This mimics the behaviour for the log_...() macros like log_debug() and
log_info(), so we can drop the special case for these.
Add new tests to cover this case.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v3:
- Rebase on hexdump series
http://patchwork.ozlabs.org/project/uboot/list/?series=242818
Changes in v2:
- Update commit message and cover letter to mention log_...() macros
- Add a test for !CONFIG_LOG
- Update log() to (effectively) call debug() for log_level == LOGL_DEBUG
doc/develop/logging.rst | 6 ++++--
include/log.h | 34 +++++++++++++++-------------------
test/log/Makefile | 1 +
test/log/nolog_ndebug.c | 38 ++++++++++++++++++++++++++++++++++++++
test/log/nolog_test.c | 3 +++
5 files changed, 61 insertions(+), 21 deletions(-)
create mode 100644 test/log/nolog_ndebug.c
diff --git a/doc/develop/logging.rst b/doc/develop/logging.rst
index f4e925048e8..51095b05ba9 100644
--- a/doc/develop/logging.rst
+++ b/doc/develop/logging.rst
@@ -52,6 +52,10 @@ If CONFIG_LOG is not set, then no logging will be available.
The above have SPL and TPL versions also, e.g. CONFIG_SPL_LOG_MAX_LEVEL and
CONFIG_TPL_LOG_MAX_LEVEL.
+If logging is disabled, the default behaviour is to output any message at
+level LOGL_INFO and below. If logging is disabled and DEBUG is defined (at
+the very top of a C file) then any message at LOGL_DEBUG will be written.
+
Temporary logging within a single file
--------------------------------------
@@ -291,8 +295,6 @@ More logging destinations:
Convert debug() statements in the code to log() statements
-Support making printf() emit log statements at L_INFO level
-
Convert error() statements in the code to log() statements
Figure out what to do with BUG(), BUG_ON() and warn_non_spl()
diff --git a/include/log.h b/include/log.h
index feb0204855a..e0e12ce1944 100644
--- a/include/log.h
+++ b/include/log.h
@@ -174,6 +174,10 @@ int _log_buffer(enum log_category_t cat, enum log_level_t level,
*/
#if CONFIG_IS_ENABLED(LOG)
#define _LOG_MAX_LEVEL CONFIG_VAL(LOG_MAX_LEVEL)
+#else
+#define _LOG_MAX_LEVEL LOGL_INFO
+#endif
+
#define log_emer(_fmt...) log(LOG_CATEGORY, LOGL_EMERG, ##_fmt)
#define log_alert(_fmt...) log(LOG_CATEGORY, LOGL_ALERT, ##_fmt)
#define log_crit(_fmt...) log(LOG_CATEGORY, LOGL_CRIT, ##_fmt)
@@ -185,34 +189,19 @@ int _log_buffer(enum log_category_t cat, enum log_level_t level,
#define log_content(_fmt...) log(LOG_CATEGORY, LOGL_DEBUG_CONTENT, ##_fmt)
#define log_io(_fmt...) log(LOG_CATEGORY, LOGL_DEBUG_IO, ##_fmt)
#define log_cont(_fmt...) log(LOGC_CONT, LOGL_CONT, ##_fmt)
-#else
-#define _LOG_MAX_LEVEL LOGL_INFO
-#define log_emerg(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_alert(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_crit(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_err(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_warning(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_notice(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_info(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_cont(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
-#define log_debug(_fmt, ...) debug(_fmt, ##__VA_ARGS__)
-#define log_content(_fmt...) log_nop(LOG_CATEGORY, \
- LOGL_DEBUG_CONTENT, ##_fmt)
-#define log_io(_fmt...) log_nop(LOG_CATEGORY, LOGL_DEBUG_IO, ##_fmt)
-#endif
-#if CONFIG_IS_ENABLED(LOG)
#ifdef LOG_DEBUG
#define _LOG_DEBUG LOGL_FORCE_DEBUG
#else
#define _LOG_DEBUG 0
#endif
+#if CONFIG_IS_ENABLED(LOG)
+
/* Emit a log record if the level is less that the maximum */
#define log(_cat, _level, _fmt, _args...) ({ \
int _l = _level; \
- if (CONFIG_IS_ENABLED(LOG) && \
- (_LOG_DEBUG != 0 || _l <= _LOG_MAX_LEVEL)) \
+ if (_LOG_DEBUG != 0 || _l <= _LOG_MAX_LEVEL) \
_log((enum log_category_t)(_cat), \
(enum log_level_t)(_l | _LOG_DEBUG), __FILE__, \
__LINE__, __func__, \
@@ -229,7 +218,14 @@ int _log_buffer(enum log_category_t cat, enum log_level_t level,
_width, _count, _linelen); \
})
#else
-#define log(_cat, _level, _fmt, _args...)
+
+/* Note: _LOG_DEBUG != 0 avoids a warning with clang */
+#define log(_cat, _level, _fmt, _args...) ({ \
+ int _l = _level; \
+ if (_LOG_DEBUG != 0 || _l <= LOGL_INFO || \
+ (_DEBUG && _l == LOGL_DEBUG)) \
+ printf(_fmt, ##_args); \
+ })
#define log_buffer(_cat, _level, _addr, _data, _width, _count, _linelen) ({ \
int _l = _level; \
diff --git a/test/log/Makefile b/test/log/Makefile
index 09f8689d070..08eea70e344 100644
--- a/test/log/Makefile
+++ b/test/log/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_CONSOLE_RECORD) += cont_test.o
obj-y += pr_cont_test.o
else
obj-$(CONFIG_CONSOLE_RECORD) += nolog_test.o
+obj-$(CONFIG_CONSOLE_RECORD) += nolog_ndebug.o
endif
endif # CONFIG_UT_LOG
diff --git a/test/log/nolog_ndebug.c b/test/log/nolog_ndebug.c
new file mode 100644
index 00000000000..5df353781d9
--- /dev/null
+++ b/test/log/nolog_ndebug.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Logging function tests for CONFIG_LOG=n without #define DEBUG
+ */
+
+#include <common.h>
+#include <console.h>
+#include <log.h>
+#include <test/log.h>
+#include <test/ut.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define BUFFSIZE 32
+
+static int log_test_log_disabled_ndebug(struct unit_test_state *uts)
+{
+ char buf[BUFFSIZE];
+ int i;
+
+ memset(buf, 0, BUFFSIZE);
+ console_record_reset_enable();
+
+ /* Output a log record at every level */
+ for (i = LOGL_EMERG; i < LOGL_COUNT; i++)
+ log(LOGC_NONE, i, "testing level %i\n", i);
+ gd->flags &= ~GD_FLG_RECORD;
+
+ /* Since DEBUG is not defined, we expect to not get debug output */
+ for (i = LOGL_EMERG; i < LOGL_DEBUG; i++)
+ ut_assertok(ut_check_console_line(uts, "testing level %d", i));
+ ut_assertok(ut_check_console_end(uts));
+
+ return 0;
+}
+LOG_TEST(log_test_log_disabled_ndebug);
diff --git a/test/log/nolog_test.c b/test/log/nolog_test.c
index cb4fb3db9a2..4e52e5bed82 100644
--- a/test/log/nolog_test.c
+++ b/test/log/nolog_test.c
@@ -10,6 +10,7 @@
#include <common.h>
#include <console.h>
+#include <log.h>
#include <asm/global_data.h>
#include <test/log.h>
#include <test/test.h>
@@ -128,8 +129,10 @@ static int log_test_nolog_debug(struct unit_test_state *uts)
memset(buf, 0, BUFFSIZE);
console_record_reset_enable();
log_debug("testing %s\n", "log_debug");
+ log(LOGC_NONE, LOGL_DEBUG, "more %s\n", "log_debug");
gd->flags &= ~GD_FLG_RECORD;
ut_assertok(ut_check_console_line(uts, "testing log_debug"));
+ ut_assertok(ut_check_console_line(uts, "more log_debug"));
ut_assertok(ut_check_console_end(uts));
return 0;
}
--
2.31.1.607.g51e8a6a459-goog
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