[Bug 45199] Many applications and games fail to start/ crash after compiling wine with gcc 8.1.0 and -O2 (GOT/ PIC register load code now emitted at function entry, missing hotpatch signatures)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45199

Roman Kagan <rkagan at mail.ru> changed:

           What    |Removed                     |Added
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                 CC|                            |rkagan at mail.ru

--- Comment #58 from Roman Kagan <rkagan at mail.ru> ---
I'm still seeing patching failures from tcmalloc with WoT on my Fedora29 like
this:
https://forum.winehq.org/viewtopic.php?f=8&t=31272

AFAICS on Fedora wine libraries are built with -fcf-protection making gcc emit
endbr32 (endbr64 for 64bit) as the very first instruction of every function,
which confuses the perftools/tcmalloc patcher.

Per
https://github.com/gperftools/gperftools/blob/master/src/windows/patch_functions.cc,
the list of functions it patches is

in libc:

malloc                  [*]
free
realloc
calloc
operator new
operator new[]
operator delete
operator delete[]
_msize                  [*]
_expand
_calloc_crt
_free_base              [*]
_free_dbg


in kernel32:

HeapAlloc               [*]
HeapFree                [*]
VirtualAllocEx          [*]
VirtualFreeEx           [*]
MapViewOfFileEx         [*]
UnmapViewOfFile
LoadLibraryExW
FreeLibrary


[*] are those still lacking DECLSPEC_HOTPATCH as of 3.19.

Should I reopen this bug or file a new one?

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