Open Bug 1597974 Opened 5 years ago Updated 5 months ago

Undefined behavior in LulDwarf.cpp

Categories

(Core :: Gecko Profiler, defect, P3)

Product:
Core
Component:
Gecko Profiler
Type:
defect

Tracking

()

People

(Reporter: julienw, Unassigned)

Details

Paul Adenot helped me debugging a crash lately (bug 1597972). When running a scenario in a ASAN+opt build, we got this result (but no crash :D).

This happened when clicking "start profiler" from the popup.

    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
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    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1426:44 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:117:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:118:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:119:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:120:8 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1431:45 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:125:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1438:26 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:146:3 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:152:7 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:179:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:243:11 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarf.cpp:1636:40 in 
    /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12: runtime error: load of value 4294967195, which is not a valid value for type 'lul::DwarfPointerEncoding'
    SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/padenot/src/trees/mozilla-unified/tools/profiler/lul/LulDwarfExt.h:885:12 in

I don't know if that's the reason for bug 1597972 yet, that's why I filed the bug separately.

Bug 1597972 was fixed, so (most probably) it's not linked.

There is a function checking if a DwarfPointerEncoding enum is valid:
https://searchfox.org/mozilla-central/rev/0678172d5b5c681061b904c776b668489e3355b0/tools/profiler/lul/LulDwarf.cpp#116

At a glance, the code reads a byte, force-converts it to the enum, and checks if that enum is valid before actually using it.
So I think the code is probably fine in practice.

Though the enum is not given an underlying type, so I think it's a 32-bit int by default.
That's why a byte like 0x9B is read as a (signed) char and is sign-extended to int 0xFFFFFF9B == 4294967195, which doesn't match any of the enum enumerators, making ASAN sad. But if that number is then always masked by an appropriate 1-byte mask when used, it should also be fine.

Technically this may not actually be UB. But It would be better to avoid this issue of course. I'm thinking maybe:

  • The data could be first checked as a raw byte, and only converted to the enum if valid.
  • As the enumerators listed in enum DwarfPointerEncoding don't actually cover all possible value, this type should not be an enum. Instead it could be a plain byte with supporting non-UB functions, or a proper class.
Priority: -- → P3
Severity: normal → S3
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