[PATCH 0/1] MR14: dlls/dbghelp: introduce symt_find_symbol_at()
eric pouech (@epo)
wine at gitlab.winehq.org
Fri Apr 29 04:13:13 CDT 2022
To be used in place of symt_find_nearest().
symt_find_symbol_at() ensures that the address passed is whithin the
boundaries of the returned symbol (while find_nearest() doesn't).
This fixes erroneous backtraces in debugger like:
$ ./wine winedbg notepad
WineDbg starting on pid 0104
RtlDefaultNpAcl () at Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731
0x00000170054805 ntdll+0x54805 [Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731]: ret
1731 }
Wine-dbg>bt
Backtrace:
=>0 0x00000170054805 RtlDefaultNpAcl+0x2d5(pAcl=<internal error>) [Z:\home\eric\work\wine\dlls\ntdll\sec.c:1731] in ntdll (0x000001700701a4)
1 0x0000017002d6c4 __wine_pop_frame(pAcl=<internal error>) [Z:\home\eric\work\wine\include\wine\exception.h:273] in ntdll (0x000001700701a4)
2 0x0000017002d6c4 process_breakpoint+0x84() [Z:\home\eric\work\wine\dlls\ntdll\loader.c:3912] in ntdll (0x000001700701a4)
3 0x000001700354c9 LdrInitializeThunk+0x509(context=<register R13 not accessible in this frame>, unknown2=<internal error>, unknown3=<internal error>, unknown4=<internal error>) [Z:\home\eric\work\wine\dlls\ntdll\loader.c:4200] in ntdll (0x000001700701a4)
where RtlDefaultNpAcl() has nothing to do here (it's the symbol below RIP
and we don't have a symbol with debug information for that address).
Signed-off-by: Eric Pouech <eric.pouech at gmail.com>
--
https://gitlab.winehq.org/wine/wine/-/merge_requests/14
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