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Nasal/debug.nas: backtrace(): reinstate mechanism to truncate long filenames.

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Also made it configurable.
This commit is contained in:
Julian Smith 2021-08-29 20:55:45 +01:00
parent bdedb1dcc4
commit 68997879d3
1 changed files with 14 additions and 1 deletions
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15
Nasal/debug.nas
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@ -305,7 +305,18 @@ var funcname = func(f) {
return "-unknown-";
}
var backtrace = func(desc = nil, dump_vars = 1, skip_level = 0) {
# Write backtrace information.
#
# desc:
# Text to write in first line.
# dump_vars:
# If true, show info about variables.
# skip_level:
# How many top-level stack frames to skip.
# shorten:
# If greater than 10, max filename length before being trimmed.
#
var backtrace = func(desc = nil, dump_vars = 1, skip_level = 0, shorten = 50) {
var d = (desc == nil) ? "" : " '" ~ desc ~ "'";
print("");
print(_title("### backtrace" ~ d ~ " ###"));
@ -314,6 +325,8 @@ var backtrace = func(desc = nil, dump_vars = 1, skip_level = 0) {
if ((var v = caller(i)) == nil) return caller(i - 1);
var filename = v[2];
var line = v[3];
if (shorten >= 10 and size(filename) > shorten)
filename = substr(filename, 0, 5)~"[...]"~substr(filename, -(shorten-10));
print(_section(sprintf("#%-2d called from %s:%d (%s) (locals %s):",
i - skip_level, filename, line, funcname(v[1]), id(v[0]))));
if (dump_vars) dump(v[0]);