bionic's __stack_chk_fail was preventing debuggerd from dumping
stacks, which was not helpful.
Bug: 2487269
Change-Id: Idba2a274037b960dfb2ac1c21686323268c4b372
Restore the security contexts of tombstone directory
when initially created.
Change-Id: I25b53730991576eccb62ca57050decd584acc639
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
Provides a new mechanism for dumpstate (while running as root)
to request that debuggerd dump the stacks of native processes that
we care about in bug reports. In this mode, the backtrace
is formatted to look similar to a Dalvik backtrace.
Moved the tombstone generating code into a separate file to
make it easier to maintain.
Fixed a bug where sometimes the stack traces would be incomplete
because we were not waiting for each thread to stop after issuing
PTRACE_ATTACH, only the main thread. So sometimes we were missing
traces for some threads.
Refactored the logging code to prevent accidentally writing data
to logcat when explicitly dumping a tombstone or backtrace from the
console.
Only root or system server can request to dump backtraces but
only root can dump tombstones.
Bug: 6615693
Change-Id: Ib3edcc16f9f3a687e414e3f2d250d9500566123b
This change enables debuggerd to provide backtraces with function
names in tombstone files and log messages. It does this by reading
the image file that the address is found in, and parsing the dynamic
symbol table to try to extract the symbol corresponding to the given
address.
This works best when "-Wl,-export-dynamic" is added to the LDFLAGS
of each library and executable, because this will cause all symbols
to be added to the dynamic symbol table. If this flag is not present,
it will still work, but it will only be able to identify functions
which are part of the external API of the library/executable.
Change-Id: I618baaff9ed9143b7d1a1f302224e9f21d2b0626
Ying Wang