Commit 42a94c4d authored by Alexandre Duret-Lutz's avatar Alexandre Duret-Lutz
Browse files

bin: add support for SPOT_OOM_ABORT

* bin/common_setup.cc: Here.
* NEWS, bin/man/spot-x.x: Document it.
parent b2068763
......@@ -65,6 +65,10 @@ New in spot 2.4.2.dev (not yet released)
by their acceptance name (Buchi, co-Buchi, Streett, etc.) or
"other" if no name is known for the acceptance condition.
- All tools learned to check the SPOT_OOM_ABORT environment
variable. This is only useful for debuging out-of-memory
conditions; see the spot-x(7) man page for detail.
Library:
- Rename three methods of spot::scc_info. New names are clearer. The
......
......@@ -79,6 +79,14 @@ static void setup_sig_handler()
# define setup_sig_handler() while (0);
#endif
static void bad_alloc_handler()
{
std::set_new_handler(nullptr);
std::cerr << "not enough memory\n";
abort();
}
void
setup(char** argv)
{
......@@ -91,6 +99,9 @@ setup(char** argv)
argp_err_exit_status = 2;
if (getenv("SPOT_OOM_ABORT"))
std::set_new_handler(bad_alloc_handler);
std::ios_base::sync_with_stdio(false);
// Do not flush std::cout every time we read from std::cin, unless
// we are reading from a terminal. Note that we do flush regularly
......
......@@ -99,6 +99,19 @@ in third-party tools that output incorrect HOA (e.g., declaring
the automaton with property "univ-branch" when no universal branching
is actually used)
.TP
\fBSPOT_OOM_ABORT\fR
If this variable is set, Out-Of-Memory errors will \f(CWabort()\fR the
program (potentially generating a coredump) instead of raising an
exception. This is useful to debug a program and to obtain a stack
trace pointing to the function doing the allocation. When this
variable is unset (the default), \f(CWstd::bad_alloc\fR are thrown on
memory allocation failures, and the stack is usually unwinded up to
top-level, losing the original context of the error. Note that at
least \f(CWltlcross\fR has some custom handling of
\f(CWstd::bad_alloc\fR to recover from products that are too large (by
ignoring them), and setting this variable will interfer with that.
.TP
\fBSPOT_PR_CHECK\fR
Select the default algorithm that must be used to check the persistence
......
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