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Anticipate testcase problems with GCC 12

Browse Source 
There will be a lot more to come.

On amd64 Linux
In faultstatus was seeing the division by zero and emitting a ud2 opcode.
In wrap3 a pair of mutually recursive functions were being inlined.
When forced not to be inlined GCC merged them into a single function.
It cannot see that the client requests have diffeent behaviour.
This commit is contained in:
Paul Floyd 2021-11-23 23:37:02 +01:00
parent 01e05ea81c
commit 49fe0dc74a
2 changed files with 7 additions and 3 deletions
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6
memcheck/tests/wrap3.c
View File

@ -5,17 +5,19 @@
/* Check that function wrapping works for a mutually recursive /* Check that function wrapping works for a mutually recursive
pair. */ pair. */
static int fact1 ( int n ); int fact1 ( int n );
static int fact2 ( int n ); int fact2 ( int n );
/* This is needed to stop gcc4 turning 'fact' into a loop */ /* This is needed to stop gcc4 turning 'fact' into a loop */
__attribute__((noinline)) __attribute__((noinline))
int mul ( int x, int y ) { return x * y; } int mul ( int x, int y ) { return x * y; }
__attribute((noinline))
int fact1 ( int n ) int fact1 ( int n )
{ {
if (n == 0) return 1; else return mul(n, fact2(n-1)); if (n == 0) return 1; else return mul(n, fact2(n-1));
} }
__attribute((noinline))
int fact2 ( int n ) int fact2 ( int n )
{ {
if (n == 0) return 1; else return mul(n, fact1(n-1)); if (n == 0) return 1; else return mul(n, fact1(n-1));

4
none/tests/faultstatus.c
View File

@ -190,7 +190,9 @@ int main()
return 0; return 0;
} }
static volatile s_zero;
static int zero() static int zero()
{ {
return 0; return s_zero;
} }