While this was never an inline, this function alone has caused most of
the bug reports related to _FILE_OFFSET_BITS=64. Providing an inline
for it should allow a lot more code to build with _FILE_OFFSET_BITS=64
when targeting pre-L.
Test: make checkbuild
Test: built trivial cc_binary for LP32 against API 14 with
_FILE_OFFSET_BITS=64 set
Bug: lots
Change-Id: I8479d34af4da358c11423bee43d45b59e9d4143e
For non-zygote spawned processes, we might want to dump the backtrace
data. Provide a method to send a signal to a process and then dump the
data to a file.
Adds a method to dump the backtrace data on exit.
Update documentation and explain format of heap dump data.
Test: Ran unit tests, enabled new options and used them.
Change-Id: Ie2fa706694160731afe02c1382b037d06df1d069
Bug: 62141808
Test: Ran unit tests, ran malloc debug with leaks and verified functions
Test: are demangled.
Change-Id: I1900632e9a55bb818b1aabc798224ff3eebc1fca
The libmemunreachable code uses backtrace_string to print out the backtrace
information. However, when the offset of the map that a frame is in is
non-zero, no information is printed. This means that when a frame comes from
a shared library loaded from an apk, it's impossible to tell which
shared library the frame is really coming from.
Add the offset display when it's non-zero. This means this can now be fed
to development/scripts/stack to decode the frame.
Bug: 37276041
Test: Ran dumpsys meminfo --unreachable on an app that leaks from a
Test: shared library and verified the offset output is present.
Change-Id: I61d34ae3f617622d354cc099eff520a64782b6e2
Bug: 36401135
Test: Actually enable debug malloc and verify it loads properly.
Test: Ran unit tests.
Change-Id: I9df1699b06bb14c5df2c3cab35dc2eb0819033f1
Add the mallopt function, and only a single option so far.
Bug: 36401135
Test: Built and booted bullhead.
Test: Ran jemalloc unit tests.
Test: Ran bionic unit tests.
Test: Ran a test that allocated and free'd a large piece of memory,
Test: and verified that after changing the parameter, the PSS
Test: sticks around (decay timer set to 1), the PSS is purged (decay
Test: timer set to 0).
Change-Id: I6927929b0c539c1023d34772d9e26bb6a8a45877
This library is used by a number of different libraries in the system.
Make it easy for platform libraries to use this library and create
an actual exported include file.
Change the names of the functions to reflect the new name of the library.
Run clang_format on the async_safe_log.cpp file since the formatting is
all over the place.
Bug: 31919199
Test: Compiled for angler/bullhead, and booted.
Test: Ran bionic unit tests.
Test: Ran the malloc debug tests.
Change-Id: I8071bf690c17b0ea3bc8dc5749cdd5b6ad58478a
This should make it easier to add new options, and to add options that
are complex. For example, I want to modify the behavior of
record_allocs_file so that it also enables record_allocs to a default
state.
Test: All unit tests pass.
Test: Enable the backtrace option and restart.
Change-Id: Idf5cdeed06ade3bc2c8ae39d228734bf65209b4f
When I rewrote malloc debug, I accidentally thought that each
value returned in the info buffer contained the number of backtrace
frames in the backtrace. This was incorrect, it should have been
the total number of allocations with the same backtrace.
This is a temporary fix that sets that value to 1. The better fix is
to de-dupe backtraces and then return all allocations of the same size
with the same backtrace.
I updated the documents to describe this.
Bug: 31854476
Test: Unit tests pass.
Change-Id: Idf9efaa3d363923b5d7543d90dc7c65a0ed553d9
Previously malloc debug can be enabled only using global settings
accessible to the root user only. This CL adds a new option to enable
it using environment variables making it possible to use it with pure
native (shell) applications on production builds (from shell user) and
prepares it for using it from logwrapper on production devices.
Remove the old environment variable and property since they are not
necessary.
Test: Enable malloc debug using environment variable and verify
Test: that it only affects the commands launched from the shell.
Test: Enable malloc debug using the property variable and verify
Test: that it affects all commands.
Test: Run all unit tests in 32 bit and 64 bit.
Change-Id: Iecb75a3471552f619f196ad550c5f41fcd9ce8e5
If the dladdr call fails, then info.dli_fname will be unitialized.
Make sure that this can't happen.
Bug: 32907235
Test: Enabled malloc debug on an angler and verified that function names
Test: still work.
Change-Id: I738e66d9f37bce07bc4c10f1f9bac11fbfdae2c7
Fix the incorrect mention of when the zygote flag is set on a size.
Add information about how to use am dumpheap -n to dump the native
heap to a file.
Test: Documentation only change.
Change-Id: I82e810ee7ffffcf7506fb6fd9bcfdfb0465a48be
This option adds the ability to record all of the allocation requests
and dump them to a file when a signal is sent to the process.
Included in this change, redo the option processing to add a new
string option.
Bug: 27747898
Change-Id: Ida043362e38b5eb1d459c99db9c2581015dab366
Add a new document that describes the previous version of malloc debug.
Add a small update to the current documentation to indicate it only
applies to N and later.
Change-Id: Ief74c253ba79018777aa688bde7f5b35319fa4d4
I changed the output from "pointer" to "allocation" for allocation
mismatches. I forgot to update the tests.
Bug: 28218530
Change-Id: I3278cb1dd17fb50ff7448c00e069c1af68ce5a57
- Change the printed name from pointer to allocation to be explicit about
what is wrong.
- Change the signal to be SIGRTMAX - 19 instead of SIGRTMIN. This should
prevent problems if we have to reserve other real time signals.
Bug: 28218530
Change-Id: Ic7d9c471929264d8e47bafaffc16e099840c9e71
- Move all ScopedDisableDebugCalls into the debug_XXX calls. This avoids
any issues that might arise where every part of the code needs to properly
guard anything that might allocate. Instead everything is already guarded.
- Add a pointer to debug_data in all of the XXData classes. This avoids
calling individual functions passing in the debug_data pointer.
- Flip the NO_HEADER_OPTIONS to an explicit HEADER_OPTIONS list since fewer
options actually require a header.
- Move the extern of g_debug to the DebugData.h header.
Change-Id: Ia213a391b4a44d9ce122a709d09fe4f1b5426f36
The free track mechanism could fail if, at the same time a free occurs,
another thread is trying to free and verify the same allocation. This
doesn't work if the freed allocation is added to the list and we still
do work on it. The fix is to only add to the free list when we are done
with the allocation.
Also fix a problem where the usable size is computed incorrectly because
two of the arguments where reversed.
In addition, add a check that the allocation being verified has the correct
tag before trying to check the body of the allocation.
Add a test to catch the original failure.
Add a test for the tag being different.
Bug: 27601650
Change-Id: Ie9200677d066255b8e668a48422f23f909f4ddee
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
