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glr2.cc: more checks

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* data/skeletons/glr2.cc: Clarify use of magic numbers.
(glr_stack_item::getState): Check the returned state.
This commit is contained in:
Akim Demaille
2020-12-20 09:44:30 +01:00
parent fe0102d4d5
commit 611348e67b
2 changed files with 19 additions and 6 deletions
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10
README-hacking.md
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@@ -487,6 +487,16 @@ useful. Here's one way to set ASAN up with GCC 10 on Mac Ports
$ make check-local TESTSUITEFLAGS='-j5 -k cex' ASAN_OPTIONS=detect_leaks=1
5. You might need a suppression file. See
https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#suppressions.
With G++ on a Mac, you might need a suppression file (say
leak.suppression) that contains:
leak:std::clog
and pass the additional flags
`LSAN_OPTIONS=suppressions=$PWD/leak.suppressions,print_suppressions=0`
## make maintainer-check-valgrind
This target uses valgrind both to check bison, and the generated parsers.

15
data/skeletons/glr2.cc
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@@ -1215,7 +1215,7 @@ public:
glr_stack_item (const glr_stack_item& other) YY_NOEXCEPT YY_NOTHROW
: is_state_ (other.is_state_)]b4_parse_assert_if([[
, magic_ (0xDEAD1ACC)]])[
, magic_ (MAGIC)]])[
{]b4_parse_assert_if([[
other.check_ ();]])[
std::memcpy (raw_, other.raw_, union_size);
@@ -1256,7 +1256,9 @@ public:
check_ ();]])[
YYDASSERT (is_state ());
void *yyp = raw_;
return *static_cast<glr_state*> (yyp);
glr_state& res = *static_cast<glr_state*> (yyp);]b4_parse_assert_if([[
res.check_ ();]])[
return res;
}
const glr_state& getState () const
@@ -1264,7 +1266,9 @@ public:
check_ ();]])[
YYDASSERT (is_state ());
const void *yyp = raw_;
return *static_cast<const glr_state*> (yyp);
const glr_state& res = *static_cast<const glr_state*> (yyp);]b4_parse_assert_if([[
res.check_ ();]])[
return res;
}
semantic_option& getOption ()
@@ -1313,7 +1317,7 @@ public:
YYASSERT (this->is_state_ == false || this->is_state_ == true);
}
// A magic number to check our pointer arithmetics is sane.
enum { MAGIC = 0xDEAD1ACC };
enum { MAGIC = 0xDEAD1ACC }; // 3735886540.
const unsigned int magic_;]])[
};
@@ -2349,8 +2353,7 @@ public:
YYASSERT (yyk.get() == 0);
glr_stack_item* yyrhs = yystateStack.firstTop()->asItem();
YY_REDUCE_PRINT ((true, yyrhs, yyk, yyrule, yyparser));
const YYRESULTTAG res = yyuserAction (yyrule, yynrhs, yyrhs,
yyvalp]b4_locations_if([, yylocp])[);
const YYRESULTTAG res = yyuserAction (yyrule, yynrhs, yyrhs, yyvalp]b4_locations_if([, yylocp])[);
yystateStack.pop_back(static_cast<size_t>(yynrhs));
yystateStack.setFirstTop(&yystateStack[yystateStack.size() - 1].getState());
return res;