diff options
Diffstat (limited to 'subx')
| -rw-r--r-- | subx/056trace.subx | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/subx/056trace.subx b/subx/056trace.subx index af52da2a..80b67643 100644 --- a/subx/056trace.subx +++ b/subx/056trace.subx @@ -6,17 +6,11 @@ # data : (array byte) # prefixed by length as usual # In a real trace the data will be in a special segment set aside for the purpose. # -# primitives for operating on traces: -# - initialize-trace-stream (update global variable) -# - trace: stream, string -# - die: stream (exit(1) if using real trace) -# - check-trace-contains: stream, string/line, string/message (scans only from stream's read pointer, prints message to stderr on failure, updates stream's read pointer) -# - scan-to-next-line: stream (advance read pointer past next newline) -# -# Traces are very fundamental, so many of the helpers we create here won't be -# used elsewhere; we'll switch to more bounds-checked variants. But here we get -# bounds-checking for free; we allocate a completely disjoint segment for trace -# data, and overflowing it will generate a page fault. +# primitives for operating on traces (arguments in quotes): +# - initialize-trace-stream: populates Trace-stream with a new segment of the given 'size' +# - trace: adds a 'line' to Trace-stream +# - check-trace-contains: scans from Trace-stream's start for a matching 'line', prints a 'message' to stderr on failure +# - check-trace-scans-to: scans from Trace-stream's read pointer for a matching 'line', prints a 'message' to stderr on failure == data |