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Do not store getenv() pointers in static variables.

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... or the pointer might be invalidated if the environments
changes.  Fixes #63.

* src/taalgos/dotty.cc, src/tgbaalgos/dotty.cc,
src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc:
Copy the environment in strings instead.
* wrap/python/tests/automata.ipynb: Adjust comment.
This commit is contained in:
Alexandre Duret-Lutz 2015-03-20 19:07:02 +01:00
parent 519f5e3cee
commit 125fa983ab
5 changed files with 71 additions and 31 deletions
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13
src/tgbaalgos/dtbasat.cc
View file

@ -766,8 +766,15 @@ namespace spot
if (!solution.second.empty())
res = sat_build(solution.second, d, a, state_based);
static const char* log = getenv("SPOT_SATLOG");
if (log)
// Always copy the environment variable into a static string,
// so that we (1) look it up once, but (2) won't crash if the
// environment is changed.
static std::string log = []()
{
auto s = getenv("SPOT_SATLOG");
return s ? s : "";
}();
if (!log.empty())
{
std::fstream out(log,
std::ios_base::app | std::ios_base::out);
@ -790,7 +797,7 @@ namespace spot
<< te.utime() << ',' << te.stime() << ','
<< ts.utime() << ',' << ts.stime() << '\n';
}
static const char* show = getenv("SPOT_SATSHOW");
static bool show = getenv("SPOT_SATSHOW");
if (show && res)
dotty_reachable(std::cout, res);