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6 commits

Author SHA1 Message Date
Tommi Rantala
5e7e890a0b Plug in `ALIAS' attribute 2012-09-28 14:51:21 +03:00
Tommi Rantala
e3e49dc28a Define and use `NOINLINE' 2012-09-28 14:51:19 +03:00
Tommi Rantala
ff0c6ccf6b Remove unneeded length modifier from suppressed match in sscanf() format in tests/crasher.c
GCC is complaining about the `%*jx' match in sscanf() format string.
Replace it with `%*x'; sscanf() will identically match an unsigned
hexadecimal integer without the length modifier.

crasher.c: In function 'write_maps':
crasher.c:30:9: warning: use of assignment suppression and length modifier together in gnu_scanf format [-Wformat]
2012-08-21 22:30:47 +03:00
Konstantin Belousov
04c77cced4 Fix for test suite build in the separate directory.
Avoid manually coding the rule to build crasher, instead fuddle
the compiler so that even -O2 optimization does not eliminate call
to b().

First, put calls to both a() and b() in the b() into non-tail-recursive
position. Second, as recommended in gcc manual, use asm volatile("");
to prevent further prevent inlining, besides attribute((noinline).
And third, call b() by alias, which current gcc optimizer cannot see
through.

Also, do not dereference NULL in a, and mark the memory access as volatile.
[ Minor portability improvements: asharma@fb.com ]
2012-08-11 22:02:55 -07:00
Konstantin Belousov
0f6c8313b7 Port crasher to FreeBSD. 2012-06-23 11:39:18 -07:00
Martin Milata
0f9a540c8c coredump: add test
Program test-coredump-unwind was modified to map backing files based on
virtual addresses instead of segment numbers.

The crasher.c is a program that essentially calls some functions and
then writes to invalid address causing a crash. Before that, it detects
which executables are mapped to which virtual addresses and writes this
information to a file suitable for consumption by test-coredump-unwind.
The mapping information is obtained form /proc/self/maps, so currently
it only works on linux.

The test itself is a shell script, which first runs the program and then
runs test-coredump-unwind on the resulting core and address space
map file to check whether the stack trace obtained from the dump roughly
corresponds to what it should look like.

Signed-off-by: Martin Milata <mmilata@redhat.com>
2012-05-31 11:00:40 +02:00