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strace is now provided under the terms of the GNU Lesser General
Public License version 2.1 or later, see COPYING for more details.
strace test suite is now provided under the terms of the GNU General
Public License version 2 or later, see tests/COPYING for more details.
* mmap_cache.c (mmap_cache_search_custom): New function.
* mmap_cache.h (mmap_cache_search_fn): New type.
(mmap_cache_search_custom): New function prototype.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Do not call mmap_cache functions until mmap_cache_enable is invoked.
Change struct mmap_cache_t into a proxy structure, move all mmap_cache
data from struct tcb inside this new structure.
* Makefile.am (strace_SOURCES): Move mmap_cache.c and mmap_cache.h
to libstrace_a_SOURCES.
* defs.h (struct tcb): Remove mmap_cache_size and mmap_cache_generation
* fields.
* mmap_cache.h (struct mmap_cache_t): Rename
to struct mmap_cache_entry_t, create a new struct mmap_cache_t,
all users updated.
(mmap_cache_delete): Remove.
* mmap_cache.c (mmap_cache_delete): Rename to delete_mmap_cache,
add static qualifier.
(build_mmap_cache): Merge into mmap_cache_rebuild_if_invalid.
* strace.c (droptcb): Replace mmap_cache_delete invocation
with tcp->mmap_cache->free_fn.
* mmap_cache.c: Include mmap_notify.h.
(mmap_cache_enable): Call mmap_notify_register_client to use
the mmap_notify subsystem, mmap_cache_invalidate is specified
to handle the change of memory mapping.
(mmap_cache_invalidate): Add static qualifier.
* mmap_cache.h (mmap_cache_invalidate): Remove.
* syscall.c: Include mmap_notify.h instead of mmap_cache.h.
(syscall_exiting_decode): Call mmap_notify_report instead
of mmap_cache_invalidate.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Let's try to handle better the situation when build_mmap_cache is called
without mmap_cache/mmap_cache_size being reset prior to the call.
Reported by Coverity scan.
* mmap_cache.c (build_mmap_cache): Set cache_head to tcp->mmap_cache.
Reset tcp->mmap_cache_size to 0.
* largefile_wrappers.h (fopen_for_input): Define along with
fopen_for_output.
* mmap_cache.c: Include "largefile_wrappers.h".
(fopen_for_input): Remove.
* defs.h (struct mmap_cache_t): Add major and minor fields.
* mmap_cache.c (build_mmap_cache): Record device major and minor numbers.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
mmap_cache was enabled indirectly via unwind feature. As now mmap_cache
can be used by other part of strace, a way to enable mmap_cache directly
is needed.
* defs.h (mmap_cache_enable, mmap_cache_is_enabled): New function
prototypes.
* mmap_cache.c (use_mmap_cache): New file local variable.
(mmap_cache_enable, mmap_cache_is_enabled): New functions.
* syscall.c (syscall_exiting_decode): Use mmap_cache_is_enabled()
instead of stack_trace_enabled.
* unwind.c (unwind_init): Invoke mmap_cache_enable.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
To make mmap_cache reusable, records protection bits of mmap entries.
* defs.h (mmap_cache_protection): New enum.
* mmap_cache.c (build_mmpa_cache): Don't ignore entries that are not
executable, just record the protection bits here.
* unwind.c (print_stack_frame): Ignore entries that are not executable.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
print_stack_frame function in unwind.c searches a mmap entry in mmap
cache. The found entry is then used for unwinding. However, a function
searching for a mmap entry may be useful for other purposes than
unwinding.
This change re-factors the function; code for searching an entry is
now defined as a stand-alone function named mmap_cache_search.
* defs.h (mmap_cache_search): New function prototype.
print_stack_frame.
* mmap_cached.c (mmap_cache_search): New function derived from
print_stack_frame.
* unwind.c (print_stack_frame): Use it.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
For making mmap cache code reusable from other areas in strace than
unwind, mmap cache related code and unwind related code should be
separated.
This change moves the most of mmap cache code from unwind.c
to mmap_cache.c, a new file.
* unwind.c: Move mmap_cache implementation ...
* mmap_cache.c: ... to this new file.
* Makefile.am (strace_SOURCES): add mmap_cache.c.
* defs.h (struct tcb): Move mmap_cache, mmap_cache_size, and
mmap_cache_generation fields out of [USE_LIBUNWIND] condition.
(mmap_cache_invalidate, mmap_cache_delete,
mmap_cache_rebuild_if_invalid): New function prototypes.
(struct mmap_cache_t, enum mmap_cache_rebuild_result): Move from
unwind.c.
* syscall.c (syscall_exiting_decode): Replace unwind_cache_invalidate
with mmap_cache_invalidate.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
