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c++: properly initialize UBSAN built-ins

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PR c++/106062

gcc/ChangeLog:

	* ubsan.cc (sanitize_unreachable_fn): Change order of calls
	in order to initialize UBSAN built-ins.

gcc/testsuite/ChangeLog:

	* gfortran.dg/ubsan/pr106062.f90: New test.
This commit is contained in:
Martin Liska 2022-06-23 14:43:50 +02:00
parent c01fe6729e
commit 8a15cd3396
2 changed files with 13 additions and 1 deletions
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11
gcc/testsuite/gfortran.dg/ubsan/pr106062.f90 Normal file
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@ -0,0 +1,11 @@
! PR c++/106062
! { dg-do compile }
! { dg-options "-O2 -fsanitize=undefined" }
call test (reshape ((/ 'a', 'b', 'c', 'd' /), (/ 2, 2 /)))
contains
subroutine test (a)
character (*), dimension (:, :) :: a
if (len (a) .ne. 1) STOP
end
end

3
gcc/ubsan.cc
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@ -654,9 +654,10 @@ sanitize_unreachable_fn (tree *data, location_t loc)
}
else if (san)
{
fn = builtin_decl_explicit (BUILT_IN_UBSAN_HANDLE_BUILTIN_UNREACHABLE);
/* Call ubsan_create_data first as it initializes SANITIZER built-ins. */
*data = ubsan_create_data ("__ubsan_unreachable_data", 1, &loc,
NULL_TREE, NULL_TREE);
fn = builtin_decl_explicit (BUILT_IN_UBSAN_HANDLE_BUILTIN_UNREACHABLE);
*data = build_fold_addr_expr_loc (loc, *data);
}
else