A PtraceBroker/Client pair implement a PtraceConnection over a socket.
The broker runs in a process with `ptrace` capabilities for the target
process and serves requests for the client over a socket.
Bug: crashpad:30
Change-Id: Ied19bcedf84b46c8f68440fd1c284b2126470e5e
Reviewed-on: https://chromium-review.googlesource.com/780397
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
There’s no reason for ProcessReader to own its ProcessMemoryLinux via
std::unique_ptr<>.
This was discovered in a trunk Clang build, during which a
-Wdelete-non-virtual-dtor warning was produced (since Clang r312167).
The warning is not produced by earlier Clang versions or by GCC because
the “delete” happens in a system header, <memory>, when performed by
std::unique_ptr<>. Although ownership via std::unique_ptr<> is no longer
used, ProcessMemoryLinux is marked “final” because it ought to be.
In file included from ../../snapshot/linux/process_reader.cc:15:
In file included from ../../snapshot/linux/process_reader.h:21:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../include/c++/7.2.0/memory:80:
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../include/c++/7.2.0/bits/unique_ptr.h:78:2: error: delete called on non-final 'crashpad::ProcessMemoryLinux' that has virtual functions but non-virtual destructor [-Werror,-Wdelete-non-virtual-dtor]
delete __ptr;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../include/c++/7.2.0/bits/unique_ptr.h:268:4: note: in instantiation of member function 'std::default_delete<crashpad::ProcessMemoryLinux>::operator()' requested here
get_deleter()(__ptr);
^
../../snapshot/linux/process_reader.cc:169:16: note: in instantiation of member function 'std::unique_ptr<crashpad::ProcessMemoryLinux, std::default_delete<crashpad::ProcessMemoryLinux> >::~unique_ptr' requested here
ProcessReader::ProcessReader()
^
1 error generated.
Change-Id: Ibe9671db429262aca12bbfdf457c8f72cad2f358
Reviewed-on: https://chromium-review.googlesource.com/738530
Reviewed-by: Dave Bort <dbort@google.com>
Commit-Queue: Mark Mentovai <mark@chromium.org>
From edf4dde8ae10: one #include was missing, and another was sorted
incorrectly.
Change-Id: I77825f3909ae81ebf965f8c5527b44c95af29945
Reviewed-on: https://chromium-review.googlesource.com/734229
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This change also adds functions to create directories, remove files and
directories, and check for the existence of files and directories.
Change-Id: I62b78219ae2b277d6976d2d90ec86fcabd0ef073
Reviewed-on: https://chromium-review.googlesource.com/696132
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Only a Linux implementation for now, but similar code for other
OSes can move behind it in the future.
Bug: crashpad:196
Change-Id: I05966db1599a9cac3146d2a3d964e7ad8629d616
Reviewed-on: https://chromium-review.googlesource.com/685408
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Dave Bort <dbort@google.com>
A step towards making these files usable by non-Linux systems.
Bug: crashpad:196
Change-Id: I71323b29e46208b3992055722e4622d79409c44c
Reviewed-on: https://chromium-review.googlesource.com/685406
Commit-Queue: Dave Bort <dbort@google.com>
Reviewed-by: Mark Mentovai <mark@chromium.org>
A step towards making these files usable by non-Linux systems.
Bug: crashpad:196
Change-Id: I1dc4304b1376a3a5e45228cf40b23f0367d3efa8
Reviewed-on: https://chromium-review.googlesource.com/685404
Commit-Queue: Dave Bort <dbort@google.com>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Some versions of glibc (e.g., Debian GLIBC 2.24-11+deb9u1) do set a name
for the vdso mapping.
Change-Id: I342a55e95f649d5aaf1e35f1afab53d89f4ba0fc
Reviewed-on: https://chromium-review.googlesource.com/679858
Commit-Queue: Dave Bort <dbort@google.com>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
1) Add PtraceConnection which serves as the base class for specific
types of connections Crashpad uses to trace processes.
2) Add DirectPtraceConnection which is used when the handler process
has `ptrace` capabilities for the target process.
3) Move `ptrace` logic into Ptracer. This class isolates `ptrace` call
logic for use by various PtraceConnection implementations.
Bug: crashpad:30
Change-Id: I98083134a9f7d9f085e4cc816d2b85ffd6d73162
Reviewed-on: https://chromium-review.googlesource.com/671659
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
This is essentially based on a search for “^ *const [^*&]*=[^(]*$”
Change-Id: Id571119d0b9a64c6f387eccd51cea7c9eb530e13
Reviewed-on: https://chromium-review.googlesource.com/585555
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
This uses “static” at function scope to avoid making local copies, even
in cases where the compiler can’t see that the local copy is
unnecessary. “constexpr” adds additional safety in that it prevents
global state from being initialized from any runtime dependencies, which
would be undesirable.
At namespace scope, “constexpr” is also used where appropriate.
For the most part, this was a mechanical transformation for things
matching '(^| )const [^=]*\['.
Similar transformations could be applied to non-arrays in some cases,
but there’s limited practical impact in most non-array cases relative to
arrays, there are far more use sites, and much more manual intervention
would be required.
Change-Id: I3513b739ee8b0be026f8285475cddc5f9cc81152
Reviewed-on: https://chromium-review.googlesource.com/583997
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Leonard Mosescu <mosescu@chromium.org>
Debug registers are currently initialized to 0 until methods are added
to ThreadInfo to collect them.
Bug: crashpad:30
Change-Id: Ic1aab1151dcd4bed48eca8a60b76fb0d8d613418
Reviewed-on: https://chromium-review.googlesource.com/579889
Reviewed-by: Mark Mentovai <mark@chromium.org>
ProcessReader is responsible for collecting information needed to build
a snapshot of the target process, independent of the Snapshot
interface. This CL includes implementation and tests for collecting
thread information, but does not yet collect module information.
Bug: crashpad:30
Change-Id: I911f155c953129a5fa8c031e923c0de2bd740ce0
Reviewed-on: https://chromium-review.googlesource.com/488162
Reviewed-by: Mark Mentovai <mark@chromium.org>
Dynamic linkers use `struct r_debug` and `struct link_map` (defined in
`<link.h>`) to communicate lists of loaded modules to debuggers.
Bug: crashpad:30
Change-Id: Id903a1c199288dd85c34e38710cdb4c6b5fedb5b
Reviewed-on: https://chromium-review.googlesource.com/534853
Reviewed-by: Mark Mentovai <mark@chromium.org>
ELF executables and libraries may be loaded into memory in several
mappings, possibly with holes containing anonymous mappings
or mappings of other files. This method takes an input mapping and
attempts to find the mapping for file offset 0 of the same file.
Bug: crashpad:30
Change-Id: I79abf060b015d58ef0eba54a399a74315d7d2d77
Reviewed-on: https://chromium-review.googlesource.com/565223
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
