From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 14 Dec 2022 11:58:05 +0000 (+0000)
Subject: libstdc++: Fix size passed to operator delete [PR108097]
X-Git-Tag: release-12.2.mpacbti-rel1~209
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9d58614b0b8eebd64d568fa22cd31faaa5f8dce;p=thirdparty%2Fgcc.git

libstdc++: Fix size passed to operator delete [PR108097]

The number of elements gets stored in _M_capacity so use a separate
variable for the number of bytes to allocate.

libstdc++-v3/ChangeLog:

	PR libstdc++/108097
	* include/std/stacktrace (basic_stracktrace::_Impl): Do not
	multiply N by sizeof(value_type) when allocating.

(cherry picked from commit 881c6cabce5d0b27285ed41bd6dabdf48848cce7)
---

diff --git a/libstdc++-v3/include/std/stacktrace b/libstdc++-v3/include/std/stacktrace
index 8e6c79a2f4ff..a067d629a16c 100644
--- a/libstdc++-v3/include/std/stacktrace
+++ b/libstdc++-v3/include/std/stacktrace
@@ -600,8 +600,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	    {
 	      if constexpr (is_same_v<allocator_type, allocator<value_type>>)
 		{
-		  __n *= sizeof(value_type);
-		  void* const __p = _GLIBCXX_OPERATOR_NEW (__n, nothrow_t{});
+		  // For std::allocator we use nothrow-new directly so we
+		  // don't need to handle bad_alloc exceptions.
+		  size_t __nb = __n * sizeof(value_type);
+		  void* const __p = _GLIBCXX_OPERATOR_NEW (__nb, nothrow_t{});
 		  if (__p == nullptr) [[unlikely]]
 		    return nullptr;
 		  _M_frames = static_cast<pointer>(__p);