diff options
Diffstat (limited to 'src/plugins/platforms/ios/qioseventdispatcher.mm')
| -rw-r--r-- | src/plugins/platforms/ios/qioseventdispatcher.mm | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/plugins/platforms/ios/qioseventdispatcher.mm b/src/plugins/platforms/ios/qioseventdispatcher.mm index 6148338000..3de7c996f5 100644 --- a/src/plugins/platforms/ios/qioseventdispatcher.mm +++ b/src/plugins/platforms/ios/qioseventdispatcher.mm @@ -148,8 +148,10 @@ namespace // Add memory guard at the end of the reserved stack, so that any stack // overflow during the user's main will trigger an exception at that point, // and not when we return and find that the current stack has been smashed. + // We allow read though, so that garbage-collection can pass through our + // stack in its mark phase without triggering access violations. uintptr_t memoryGuardStart = qAlignUp(memoryStart, kPageSize); - if (mprotect((void*)memoryGuardStart, kPageSize, PROT_NONE)) + if (mprotect((void*)memoryGuardStart, kPageSize, PROT_READ)) qWarning() << "Failed to add memory guard:" << strerror(errno); // We don't consider the memory guard part of the usable stack space |