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From: Martin Sebor <msebor@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-5861] Use the recursive form of compute_objsize [PR 103143]. Date: Thu, 9 Dec 2021 16:52:00 +0000 (GMT) [thread overview] Message-ID: <20211209165200.26A9B385841F@sourceware.org> (raw) https://gcc.gnu.org/g:425a39fd4effd9604af9f5f0780d209036d6e886 commit r12-5861-g425a39fd4effd9604af9f5f0780d209036d6e886 Author: Martin Sebor <msebor@redhat.com> Date: Sat Dec 4 16:22:07 2021 -0700 Use the recursive form of compute_objsize [PR 103143]. gcc/ChangeLog: PR middle-end/103143 * pointer-query.cc (gimple_call_return_array): Call compute_objsize_r. gcc/testsuite/ChangeLog: PR middle-end/103143 * gcc.dg/Wstringop-overflow-83.c: New test. Diff: --- gcc/pointer-query.cc | 2 +- gcc/testsuite/gcc.dg/Wstringop-overflow-83.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/gcc/pointer-query.cc b/gcc/pointer-query.cc index 2ead0271617..25ce4303849 100644 --- a/gcc/pointer-query.cc +++ b/gcc/pointer-query.cc @@ -199,7 +199,7 @@ gimple_call_return_array (gimple *stmt, offset_int offrng[2], bool *past_end, of the source object. */ access_ref aref; tree src = gimple_call_arg (stmt, 1); - if (compute_objsize (src, stmt, 1, &aref, qry) + if (compute_objsize_r (src, stmt, 1, &aref, snlim, qry) && aref.sizrng[1] < offrng[1]) offrng[1] = aref.sizrng[1]; } diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-83.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-83.c new file mode 100644 index 00000000000..6928ee4d559 --- /dev/null +++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-83.c @@ -0,0 +1,19 @@ +/* PR middle-end/103143 - ICE due to infinite recursion in pointer-query.cc + { dg-do compile } + { dg-options "-O2 -Wall" } */ + +typedef __SIZE_TYPE__ size_t; + +void foo (size_t x) +{ + struct T { char buf[64]; char buf2[64]; } t; + char *p = &t.buf[8]; + char *r = t.buf2; + size_t i; + + for (i = 0; i < x; i++) + { + r = __builtin_mempcpy (r, p, i); + p = r + 1; + } +}
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