#2076 Cannot build rexx.img under AddressSanitizer: control stack check trips

[Moritz Hoffmann]

reportException (error=Error_Control_stack_full) ActivityManager.hpp:213
Activity::checkStackSpace Activity.cpp:2286
LanguageParser::parseSubTerm LanguageParser.cpp:3761

ASan inflates every stack frame (redzones), so the recursive-descent parser trips the interpreter's own control-stack guard while parsing the class definitions during image build:

size_t temp;
if ((char *)&temp < stackLimit && stackcheck == true) { reportException(Error_Control_stack_full); }

I tried ulimit -s 65536 — no effect, so stackLimit derives from SysActivity::getStackSize() at activity creation rather than the live OS limit. Making ASan usable would need that guard relaxed at build time (a flag to skip stackcheck, or a larger stackLimit for sanitizer builds).

Worth noting this is the same symptom as existing ticket [bugs:#1923] "Insufficient control stack space; cannot continue execution." building rexx.img. Might be worth a comment there — a build option to disable stackcheck would unblock sanitizer builds generally.

[Moritz Hoffmann]

Fixed in r13181.

[jfaucher]

Commit [r13181]