diff options
Diffstat (limited to 'Documentation/s390/s390dbf.txt')
| -rw-r--r-- | Documentation/s390/s390dbf.txt | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt index 2d10053dd97..3da163383c9 100644 --- a/Documentation/s390/s390dbf.txt +++ b/Documentation/s390/s390dbf.txt @@ -143,7 +143,8 @@ Parameter: id: handle for debug log Return Value: none -Description: frees memory for a debug log +Description: frees memory for a debug log and removes all registered debug + views. Must not be called within an interrupt handler --------------------------------------------------------------------------- @@ -157,6 +158,16 @@ Return Value: none Description: Sets new actual debug level if new_level is valid. --------------------------------------------------------------------------- +bool debug_level_enabled (debug_info_t * id, int level); + +Parameter: id: handle for debug log + level: debug level + +Return Value: True if level is less or equal to the current debug level. + +Description: Returns true if debug events for the specified level would be + logged. Otherwise returns false. +--------------------------------------------------------------------------- void debug_stop_all(void); Parameter: none @@ -495,6 +506,13 @@ and for each vararg a long value. So e.g. for a debug entry with a format string plus two varargs one would need to allocate a (3 * sizeof(long)) byte data area in the debug_register() function. +IMPORTANT: Using "%s" in sprintf event functions is dangerous. You can only +use "%s" in the sprintf event functions, if the memory for the passed string is +available as long as the debug feature exists. The reason behind this is that +due to performance considerations only a pointer to the string is stored in +the debug feature. If you log a string that is freed afterwards, you will get +an OOPS when inspecting the debug feature, because then the debug feature will +access the already freed memory. NOTE: If using the sprintf view do NOT use other event/exception functions than the sprintf-event and -exception functions. |