add stack

document -q

document core and stack

sort cores; print stack as command

changes mainly for threading support

less verbose

change to use attach functions. $a means switch thread in core dumps. (maybe that should be $A now?).

Working on better handling of multithreading in general and core dumps in particular. See notes: new types: register is something that when dereferenced gives you the registers. the Ureg is no longer mapped at 0. refconst is something that gives a constant when dereferenced. new builtin register("AX") creates register values new builtin refconst(0x123) creates refconst values new builtin var("foo") is equivalent to the variable foo (it returns foo but can also be used as the lhs of an assignment). new acid function getregs() returns a list of the current values of registers. new acid function setregs() sets the current registers to those values. note that getregs and setregs operate on register locations, not the register values themselves. new acid function resetregs() sets registers to register("AX"), etc. new acid function clearregs() sets all registers to constant -1. the default register settings are as in resetregs(), not small numbers. new acid variables coretext, pids, systype, corefile, cmdline. new behavior: local variable lookup, stk, etc., use the acid values of registers (*PC, *SP, and so on), so the thread support code can change the context completely. unary + is applicable to more data types and prints more often.

document searchpath(3)

Add searchpath().

Extract more data from core dumps.

Start working through proper handling of pthreads when debugging Linux core dumps. Pthreads for active processes is still not supported, nor are other systems.

Apparently SuSE 9.1's X distribution uses even bigger buffers than the standard ones. 64kB appears to be enough for a stack in that case, but let's just go nuts and make the stacks enormous, so that it takes a few more doublings of X's stack needs before we run into this problem again. The VM system should take care of not actually using most of the memory anyway.

redirect debugging output of isnptl

arg count