Comments (5)
cdluminate
commented on May 27, 2024
1
Ok, after fixing the test implementation (#964), the ZDNRM2 test breaks again with Debian specific build flags. I think I should try to contribute a CI test with Debian build flags. Those stack protection flags can help you guys catch more bugs.
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angsch
commented on May 27, 2024
There is a typo in the test that on most systems apparently yields a zero, but not on the two systems above.
@cdluminate I sent you an email.
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cdluminate
commented on May 27, 2024
BTW, the following is the default build flags for Debian (distribution-wide):
CFLAGS=-g -O2 -ffile-prefix-map=/home/lumin=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2
FFLAGS=-g -O2 -ffile-prefix-map=/home/lumin=. -fstack-protector-strong -fstack-clash-protection -fcf-protection
LDFLAGS=-Wl,-z,relro
I've not yet verified which argument triggered the bug. But I cannot reproduce the issue on i386 with the default flags in make.inc. The bug only appears when built using debian's flags and tools. There is a resemblance to #961 which is only triggered by coverage build.
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cdluminate
commented on May 27, 2024
With the default flags in make.inc. The test passed. But with stack protections, you can reproduce the issue with (1) the following config, (2) Patch #964, and (3) the command make blas_testing on an amd64 machine.
21c21
< FFLAGS = -O2 -frecursive
---
> FFLAGS = -g -O2 -fstack-protector-strong -fstack-clash-protection -fcf-protection
27c27
< LDFLAGS =
---
> LDFLAGS = -Wl,-z,relroThe error looks like
Test of subprogram number 6 DZNRM2
FAIL
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 1, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 2, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 3, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 4, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 5, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 6, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 7, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 8, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW= 9, test= NaN
DZNRM2: N= 1, INCX= -2, IV= 9, IW=10, test= NaN
FAIL
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 1, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 2, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 3, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 4, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 5, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 6, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 7, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 8, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW= 9, test= NaN
DZNRM2: N= 1, INCX= 1, IV= 9, IW=10, test= NaN
FAIL
DZNRM2: N= 2, INCX= -2, IV= 1, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 2, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 3, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 4, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 5, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 6, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 7, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 8, IW= 9, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 1, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 2, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 3, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 4, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 5, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 6, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 7, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 8, test= NaN
DZNRM2: N= 2, INCX= -2, IV= 9, IW= 9, test= NaN
FAIL
DZNRM2: N= 2, INCX= 1, IV= 1, IW= 9, test= NaN
DZNRM2: N= 2, INCX= 1, IV= 2, IW= 9, test= NaN
DZNRM2: N= 2, INCX= 1, IV= 3, IW= 9, test= NaN
[...truncated...]
Update: cblas1.f fails just like zcblas1.f.
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angsch
commented on May 27, 2024
I will have a look at this on the weekend.
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