xCode 和 iOS：使用泄漏进行调试

Question

我正在使用 Instruments Tool (Leaks) 来诊断泄漏，但我不太明白如何回溯到我的代码。有谁知道我该如何进一步诊断？

在 iPad (iOS 4.3.5) 上使用 Xcode 4.5 和分析。

更新：这是回溯：

thread #4: tid = 0x3203, 0x35dffd7a libicucore.A.dylib`utext_hasMetaData + 546, stop reason = EXC_BAD_ACCESS (code=2, address=0x0)
    frame #0: 0x35dffd7a libicucore.A.dylib`utext_hasMetaData + 546
    frame #1: 0x003c17d0
    frame #2: 0x35da6746 libicucore.A.dylib`icu::RuleBasedBreakIterator::handleNext(icu::RBBIStateTable const*) + 806
    frame #3: 0x35da6406 libicucore.A.dylib`icu::RuleBasedBreakIterator::next() + 82
    frame #4: 0x35da5cde libicucore.A.dylib`icu::RuleBasedBreakIterator::following(int) + 218
    frame #5: 0x35db0538 libicucore.A.dylib`ubrk_following + 8
    frame #6: 0x32bb0bc8 WebCore`WebCore::textBreakFollowing(WebCore::TextBreakIterator*, int) + 8
    frame #7: 0x32b9baee WebCore`WebCore::nextBreakablePosition(unsigned short const*, int, int, bool) + 270
    frame #8: 0x32bd0dc8 WebCore`WebCore::RenderBlock::findNextLineBreak(WebCore::BidiResolver<WebCore::InlineIterator, WebCore::BidiRun>&, bool, bool&, bool&, bool&, WebCore::EClear*) + 6920
    frame #9: 0x32b8ce02 WebCore`WebCore::RenderBlock::layoutInlineChildren(bool, int&, int&) + 1922
    frame #10: 0x32b8a1ae WebCore`WebCore::RenderBlock::layoutBlock(bool) + 690
    frame #11: 0x32b897c2 WebCore`WebCore::RenderBlock::layout() + 26
    frame #12: 0x32b8b956 WebCore`WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&, int&, int&) + 414
    frame #13: 0x32b8b24c WebCore`WebCore::RenderBlock::layoutBlockChildren(bool, int&) + 428
    frame #14: 0x32b8a1bc WebCore`WebCore::RenderBlock::layoutBlock(bool) + 704
    frame #15: 0x32b897c2 WebCore`WebCore::RenderBlock::layout() + 26
    frame #16: 0x32b8b956 WebCore`WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&, int&, int&) + 414
    frame #17: 0x32b8b24c WebCore`WebCore::RenderBlock::layoutBlockChildren(bool, int&) + 428
    frame #18: 0x32b8a1bc WebCore`WebCore::RenderBlock::layoutBlock(bool) + 704
    frame #19: 0x32b897c2 WebCore`WebCore::RenderBlock::layout() + 26
    frame #20: 0x32b8b956 WebCore`WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&, int&, int&) + 414
    frame #21: 0x32b8b24c WebCore`WebCore::RenderBlock::layoutBlockChildren(bool, int&) + 428
    frame #22: 0x32b8a1bc WebCore`WebCore::RenderBlock::layoutBlock(bool) + 704
    frame #23: 0x32b897c2 WebCore`WebCore::RenderBlock::layout() + 26
    frame #24: 0x32b8b956 WebCore`WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&, int&, int&) + 414
    frame #25: 0x32b8b24c WebCore`WebCore::RenderBlock::layoutBlockChildren(bool, int&) + 428
    frame #26: 0x32b8a1bc WebCore`WebCore::RenderBlock::layoutBlock(bool) + 704
    frame #27: 0x32b897c2 WebCore`WebCore::RenderBlock::layout() + 26
    frame #28: 0x32b8974e WebCore`WebCore::RenderView::layout() + 334
    frame #29: 0x32b85cba WebCore`WebCore::FrameView::layout(bool) + 1486
    frame #30: 0x32b82c12 WebCore`WebCore::Document::implicitClose() + 794
    frame #31: 0x32b828f6 WebCore`WebCore::FrameLoader::checkCallImplicitClose() + 86
    frame #32: 0x32b827fe WebCore`WebCore::FrameLoader::checkCompleted() + 134
    frame #33: 0x32b82380 WebCore`WebCore::FrameLoader::finishedParsing() + 64

更新：具有扩展细节的工具。仍然没有指向来源。而是指向机器码。

Answer 1

如果您打开扩展的详细视图，当您从详细视图中选择泄漏时，您应该能够看到调用堆栈。此外，切换到调用树视图可以帮助您确定代码中发生泄漏的位置。使用跳转栏切换到调用树视图。

当您切换到调用树视图时，您应该会在调用树的左侧看到一系列复选框。选择 Invert Call Tree 和 Hide System Libraries 复选框允许您在调用树中找到您的代码。双击调用树中的一个函数将显示分配泄漏内存的代码行。