From 2251fb3274ae66631be42d50508098f179f3c3e1 Mon Sep 17 00:00:00 2001 From: Erik Verbruggen Date: Tue, 18 Sep 2018 10:19:18 +0200 Subject: Prevent CoW detaches from happening Change-Id: Ia42c0d732e0f6ccfa2c70b86edccd9eb471aac7c Reviewed-by: Simon Hausmann --- src/qml/compiler/qv4compilerscanfunctions.cpp | 27 +++++++++++++++------------ src/qml/jsruntime/qv4identifiertable.cpp | 2 +- 2 files changed, 16 insertions(+), 13 deletions(-) diff --git a/src/qml/compiler/qv4compilerscanfunctions.cpp b/src/qml/compiler/qv4compilerscanfunctions.cpp index 04593f202a..8984b6931e 100644 --- a/src/qml/compiler/qv4compilerscanfunctions.cpp +++ b/src/qml/compiler/qv4compilerscanfunctions.cpp @@ -741,9 +741,9 @@ void ScanFunctions::calcEscapingVariables() if (c->contextType != ContextType::ESModule) continue; for (const auto &entry: c->exportEntries) { - auto m = c->members.find(entry.localName); - if (m != c->members.end()) - m->canEscape = true; + auto mIt = c->members.constFind(entry.localName); + if (mIt != c->members.constEnd()) + mIt->canEscape = true; } break; } @@ -759,8 +759,8 @@ void ScanFunctions::calcEscapingVariables() } Q_ASSERT(c != inner); while (c) { - Context::MemberMap::const_iterator it = c->members.find(var); - if (it != c->members.end()) { + Context::MemberMap::const_iterator it = c->members.constFind(var); + if (it != c->members.constEnd()) { if (c->parent || it->isLexicallyScoped()) { it->canEscape = true; c->requiresExecutionContext = true; @@ -816,15 +816,17 @@ void ScanFunctions::calcEscapingVariables() // add an escaping 'this' variable c->addLocalVar(QStringLiteral("this"), Context::VariableDefinition, VariableScope::Let); c->requiresExecutionContext = true; - auto m = c->members.find(QStringLiteral("this")); - m->canEscape = true; + auto mIt = c->members.constFind(QStringLiteral("this")); + Q_ASSERT(mIt != c->members.constEnd()); + mIt->canEscape = true; } if (c->innerFunctionAccessesNewTarget) { // add an escaping 'new.target' variable c->addLocalVar(QStringLiteral("new.target"), Context::VariableDefinition, VariableScope::Let); c->requiresExecutionContext = true; - auto m = c->members.find(QStringLiteral("new.target")); - m->canEscape = true; + auto mIt = c->members.constFind(QStringLiteral("new.target")); + Q_ASSERT(mIt != c->members.constEnd()); + mIt->canEscape = true; } if (c->allVarsEscape && c->contextType == ContextType::Block && c->members.isEmpty()) c->allVarsEscape = false; @@ -845,8 +847,9 @@ void ScanFunctions::calcEscapingVariables() } if (c->contextType == ContextType::Block && c->isCatchBlock) { c->requiresExecutionContext = true; - auto m = c->members.find(c->caughtVariable); - m->canEscape = true; + auto mIt = c->members.constFind(c->caughtVariable); + Q_ASSERT(mIt != c->members.constEnd()); + mIt->canEscape = true; } const QLatin1String exprForOn("expression for on"); if (c->contextType == ContextType::Binding && c->name.length() > exprForOn.size() && @@ -855,7 +858,7 @@ void ScanFunctions::calcEscapingVariables() // we don't know if the code is a signal handler or not. c->requiresExecutionContext = true; if (c->allVarsEscape) { - for (auto &m : c->members) + for (const auto &m : qAsConst(c->members)) m.canEscape = true; } } diff --git a/src/qml/jsruntime/qv4identifiertable.cpp b/src/qml/jsruntime/qv4identifiertable.cpp index e476baa886..4305bc4647 100644 --- a/src/qml/jsruntime/qv4identifiertable.cpp +++ b/src/qml/jsruntime/qv4identifiertable.cpp @@ -70,7 +70,7 @@ IdentifierTable::~IdentifierTable() { free(entriesByHash); free(entriesById); - for (auto &h : idHashes) + for (const auto &h : qAsConst(idHashes)) h->identifierTable = nullptr; } -- cgit v1.2.3