If the first option is found, then any unknown options are simply
ignored, but do not produce an error. Fixed this so that each
option found is actually verified to exist.
Bug: 27620263
Change-Id: If58732df3285eeae72188162c505e0e202fada8c
The over flow check for nmemb * bytes in debug_calloc is incorrect,
use the builtin overflow functions to check for multiplication and
addition overflow.
Change-Id: I3f1c13102621bc5380be1f69caa88dba2118f3cb
(cherry picked from commit 239838608d)
0 byte allocations can cause problems if they are immediately followed
by another allocation with no header, as both allocations will have the
same address. Treat 0 byte allocations as 1 byte allocations so that
debug_iterate will return separate addresses for them.
Bug: 27578580
Change-Id: Ia8dc3481fa7062391e9b3ae58a36e8d47e7ee557
(cherry picked from commit 15af478080)
malloc_iterate with malloc debug enabled was returning allocation sizes
using the requested size instead of usable size. If anything wrote
pointers above the requested size but below the usable size, those
pointers would be invisible to libmemunreachable and referenced
allocations could be reported as a leak.
Bug: 27107100
Change-Id: I6b19fd631f68ce93b3aee408cc3d296ec457bd01
(cherry picked from commit b23c6606d2)
Change all of the hard-coded config values to be defined constants.
Also make sure to use these constants in the usage output.
Bug: 26739265
Change-Id: I597a6d71279a2df9cc7e98c42ac70224261bac99
I added the code to force alignments of 8 for 32 bit and 16 for 64 bit,
but I missed a couple of tests that failed due to this change. Fix the
failing tests.
Bug: 26739265
Change-Id: Ice9932d1419e59c07483c4c9fcdb84970844f0a6
When using sscanf and "%4s", the array passed in must include space for
a nul terminator.
Bug: 26739265
Change-Id: I0140a6100ca370666ae61689087ba41b4914789d
Add backtrace_string to convert a malloc_debug backtrace to a string.
Also move the backtrace functions to libc_malloc_debug_backtrace so that
libmemunreachable can reuse them.
Change-Id: I5ad67001c0b4d184903c762863a8588181d4873b
In order to enforce this constraint:
The pointer returned if the allocation succeeds shall be suitably
aligned so that it may be assigned to a pointer to any type of object
and then used to access such an object in the space allocated.
Force all allocations on 32 bit systems to have 8 byte alignment,
and all allocations on 64 bit systems to have 16 byte alignment.
Add a test to verify that the allocator returns the correct alignments.
Bug: 26739265
Change-Id: I9af53279617408676b94e4ec6481b3ed7ffafc6a
Add a pthread_atfork handler to malloc_debug to lock the TrackData mutex
during fork and reset it in the child. Ensures that the TrackData is
consistent when forking from a multi-threaded process, and that the
mutex is in a defined state in the child.
Change-Id: I0dfed30045a28551217ceac227d33b2e18894932
Included in this change:
- Change the tag when a pointer is freed so it's easy to detect if
an already freed pointer is being used.
- Move the free backtrace out of the header. This backtrace is only
used under only some circumstances, so no need to allocate space
in all headers for it.
- Add new option free_track_backtrace_num_frames to specify how many
frames to record when the free occurs. This removes the dependency
on the backtrace option to get backtraces.
Bug: 26739265
Change-Id: I76f5209507dcf46af67ada162a7cb2bf282116f2
Gcc doesn't like the brace object initialization, so make all of
the Feature objects explicit.
Also, no arguments to the error_log macros make gcc unhappy, so add
an option to turn these into warnings. These will be fixed when we
add the explicit _error and _warn log functions.
Change-Id: I35af834dabb5548923e893dd980a751fdebfa13a
The major components of the rewrite:
- Completely remove the qemu shared library code. Nobody was using it
and it appears to have broken at some point.
- Adds the ability to enable/disable different options independently.
- Adds a new option that can enable the backtrace on alloc/free when
a process gets a specific signal.
- Adds a new way to enable malloc debug. If a special property is
set, and the process has an environment variable set, then debug
malloc will be enabled. This allows something that might be
a derivative of app_process to be started with an environment variable
being enabled.
- get_malloc_leak_info() used to return one element for each pointer that
had the exact same backtrace. The new version returns information for
every one of the pointers with same backtrace. It turns out ddms already
automatically coalesces these, so the old method simply hid the fact
that there where multiple pointers with the same amount of backtrace.
- Moved all of the malloc debug specific code into the library.
Nothing related to the malloc debug data structures remains in libc.
- Removed the calls to the debug malloc cleanup routine. Instead, I
added an atexit call with the debug malloc cleanup routine. This gets
around most problems related to the timing of doing the cleanup.
The new properties and environment variables:
libc.debug.malloc.options
Set by option name (such as "backtrace"). Setting this to a bad value
will cause a usage statement to be printed to the log.
libc.debug.malloc.program
Same as before. If this is set, then only the program named will
be launched with malloc debug enabled. This is not a complete match,
but if any part of the property is in the program name, malloc debug is
enabled.
libc.debug.malloc.env_enabled
If set, then malloc debug is only enabled if the running process has the
environment variable LIBC_DEBUG_MALLOC_ENABLE set.
Bug: 19145921
Change-Id: I7b0e58cc85cc6d4118173fe1f8627a391b64c0d7
