strange "UNADDRESSABLE ACCESS beyond top of stack" message

[Vincent Torri]

Hello

i have that error on Windows, using MSYS2 + mingw-w64 64 bits
toolchain, on Win7 or Win 10:

Error #5: UNADDRESSABLE ACCESS beyond top of stack: reading
0x000000000065ec68-0x000000000065ec70 8 byte(s)
# 0 libeina-1.dll!___chkstk_ms
[E:/mingwbuild/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/CRT_fp10.c:24]
# 1 libeina-1.dll!eina_xdg_env_init [../src/lib/eina/eina_vpath_xdg.c:17]
# 2 libeina-1.dll!eina_vpath_init [../src/lib/eina/eina_vpath.c:186]
# 3 libeina-1.dll!eina_init [../src/lib/eina/eina_main.c:327]
# 4 libecore-1.dll!ecore_init [../src/lib/ecore/ecore.c:248]
# 5 libecore_evas-1.dll!ecore_evas_init [../src/lib/ecore_evas/ecore_evas.c:609]
# 6 main
[C:\Documents\msys2\home\vincent.torri\code/ecore_evas_keys.c:48]
Note: @0:00:02.705 in thread 8348
Note: 0x000000000065ec68 refers to 4072 byte(s) beyond the top of the
stack 0x000000000065fc50
Note: instruction: or $0x0000000000000000 (%rcx) -> (%rcx)


../src/lib/eina/eina_vpath.c:186 is :

eina_xdg_env_init();

it is declared in an included header file like that :

void eina_xdg_env_init(void);

and ../src/lib/eina/eina_vpath_xdg.c:17 (definition of
eina_xdg_env_init()) is :

void
eina_xdg_env_init(void)
{
etc...
}

do you understand why I have that error from drmemory ?

thank you

Vincent Torri

[Derek Bruening]

"chkstk" is used to ensure the stack and its guard page are properly extended for large stack allocations in a function.  It deliberately touches memory beyond the top of the stack.  This is considered incorrect behavior for regular code, and is a type of error that Dr. Memory looks for and reports.  Dr. Memory has logic to recognize typical chkstk code and avoid reporting errors for that particular code.  This must be a new variant that is not recognized.  I would suggest filing an issue for a long-term fix, and using a suppression to ignore this ___chkstk_ms in the short term.

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[Vincent Torri]

Le mercredi 5 février 2020 17:29:36 UTC+1, Derek a écrit :

"chkstk" is used to ensure the stack and its guard page are properly extended for large stack allocations in a function.  It deliberately touches memory beyond the top of the stack.  This is considered incorrect behavior for regular code, and is a type of error that Dr. Memory looks for and reports.  Dr. Memory has logic to recognize typical chkstk code and avoid reporting errors for that particular code.  This must be a new variant that is not recognized.  I would suggest filing an issue for a long-term fix, and using a suppression to ignore this ___chkstk_ms in the short term

https://github.com/DynamoRIO/drmemory/issues/2248

regards

Vincent