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On Donnerstag, 1. Juni 2017 22:57:12 CEST Milian Wolff wrote: > Hey all, <snip> > heaptrack_gui 2228 135073.400474: 613969 cycles: > 108c8e [unknown] (/usr/lib/libQt5Core.so.5.8.0) > @@ -533,8 +529,6 @@ > 2170af [unknown] (/usr/lib/libQt5Core.so.5.8.0) > 297c53 QCoreApplicationPrivate::init (/usr/lib/ > libQt5Core.so.5.8.0) > f7cde QGuiApplicationPrivate::init > (/usr/lib/libQt5Gui.so. 5.8.0) > - 1589e8 QApplicationPrivate::init > (/usr/lib/libQt5Widgets.so. 5.8.0) > - 78622 main (/home/milian/projects/compiled/other/bin/ > heaptrack_gui) > 20439 __libc_start_main (/usr/lib/libc-2.25.so) > 78299 _start (/home/milian/projects/compiled/other/bin/ > heaptrack_gui) > > NOTE: this is super odd, it simply misses two frames in the middle?! This is really quite odd - looking at the debug output, the frames in the middle are really just skipped for some reason: unwind: access_mem addr 0x7ffca0a88330, val 4edc50, offset 2808 unwind: access_mem addr 0x7ffca0a88338, val 7f69bfce443a, offset 2816 unwind: pc: = 0x7f69c10fecde found map: 7f69c1007000 7f69c1766000 dso found: libQt5Gui.so.5.8.0 /usr/lib/libQt5Gui.so.5.8.0 reported: libQt5Gui.so.5.8.0 /usr/lib/libQt5Gui.so.5.8.0, 1 unwind: QGuiApplicationPrivate::init():ip = 0x7f69c10fecde (0xf7cde) -> so far so good, this frame is properly found inside libQt5Gui, but then: unwind: pc: = 0x7f69bfce4439 found map: 7f69bfcc4000 7f69c0069000 dso found: libc-2.25.so /usr/lib/libc-2.25.so reported: libc-2.25.so /usr/lib/libc-2.25.so, 1 unwind: __libc_start_main:ip = 0x7f69bfce4439 (0x20439) -> the next frame is is supposedly the one in libc, but what happened to the two frames in QApplicationPrivate::init and main? I also note that no calls to access_mem are occuring - is this maybe some (wrong) caching in libdw or so that interfers here? Any insight would be appreciated, thanks! -- Milian Wolff mail@milianw.de http://milianw.de
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