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It is impossible to compile a number of definitions in
include/uapi/linux/kvm.h for other platforms, which leads
to syz-extract failing to update constants.
Skip processing of this file for all arches except i386 and
amd64.
This is a hacky and (hopefully) temporary solution until #2754
is implemented.
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We generally use the newer C99 var declarations combined with initialization because:
- declarations are more local, reduced scope
- fewer lines of code
- less potential for using uninit vars and other bugs
However, we have some relic code from times when we did not understand
if we need to stick with C89 or not. Also some external contributions
that don't follow style around.
Add a static check for C89-style declarations and fix existing precedents.
Akaros toolchain uses -std=gnu89 (or something) and does not allow
variable declarations inside of for init statement. And we can't switch
it to -std=c99 because Akaros headers are C89 themselves.
So in common.h we need to declare loop counters outside of for.
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This is not needed anymore afer the previous commit.
Fixes #1918
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The added test triggers warnings like these:
<stdin>: In function ‘syz_mount_image.constprop’:
<stdin>:298:3: error: argument 1 null where non-null expected [-Werror=nonnull]
In file included from <stdin>:26:0:
/usr/include/x86_64-linux-gnu/sys/stat.h:320:12: note: in a call to function ‘mkdir’ declared here
extern int mkdir (const char *__path, __mode_t __mode)
^~~~~
cc1: all warnings being treated as errors
<stdin>: In function ‘syz_open_procfs.constprop’:
<stdin>:530:41: error: ‘%s’ directive argument is null [-Werror=format-truncation=]
<stdin>:85:110: note: in definition of macro ‘NONFAILING’
<stdin>:532:41: error: ‘%s’ directive argument is null [-Werror=format-truncation=]
<stdin>:85:110: note: in definition of macro ‘NONFAILING’
<stdin>:534:41: error: ‘%s’ directive argument is null [-Werror=format-truncation=]
<stdin>:85:110: note: in definition of macro ‘NONFAILING’
Use volatile for all arguments of syz_ functions to prevent
compiler from treating the arguments as constants in reproducers.
Popped up during bisection that used a repro that previously worked.
Update #501
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The "define uint64_t unsigned long long" were too good to work.
With a different toolchain I am getting:
cstdint:69:11: error: expected unqualified-id
using ::uint64_t;
^
executor/common.h:34:18: note: expanded from macro 'uint64_t'
Do it the proper way: introduce uint64/32/16/8 types and use them.
pkg/csource then does s/uint64/uint64_t/ to not clutter code with
additional typedefs.
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1. Basic support for arm64 kvm testing.
2. Fix compiler warnings in x86 kvm code.
3. Test all pseudo syz calls in csource.
4. Fix handling of real code in x86.
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