[MYNEWT-124] Log buffer issues

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: v0_8_0_rel
• Component/s: Misc
• Security Level: Public (Viewable by anyone)
• Assignee: Marko Kiiskila
• Reporter: Christopher Collins
• Created: 18/Feb/16 03:18
• Updated: 30/Mar/16 22:43
• Resolved: 30/Mar/16 22:43

Description

When a message is written to a log, some buffers are allocated on the stack in various places in the code. This results in two issues:

1. Undue stack-size requirements placed on any task which uses sys/log.
2. Hard limit placed on the maximum length of a log line.

There are two functions which exhibit this behavior:

• log_printf (LOG_PRINTF_MAX_ENTRY_LEN = 128)
• console_vprintf (CONS_OUTPUT_MAX_LINE = 128)

I do not have a proposed fix. I believe Marko suggested streaming bytes to the destination, rather than writing to an intermediate buffer.