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Author SHA1 Message Date
Omar Sandoval
c744b77f23 lib: workaround invalid p_paddr on kernels before v4.11 
p_paddr in /proc/kcore is always zero before Linux v4.11, so we can't
easily read from the physical address we get from /sys/kernel/vmcoreinfo
(we would need architecture-specific knowledge of the virtual address of
the direct mapping, as well as a way to defeat CONFIG_RANDOMIZE_MEMORY).
Instead, we can get the only two fields we currently use through other
means (OSRELEASE is trivial and KERNELOFFSET can be determined by
comparing /proc/kallsyms to the ELF symbols).
 2018-07-27 22:41:40 -07:00
Omar Sandoval
e8bafb750b type: also dereference C strings in structs and arrays 2018-07-23 20:30:26 -07:00
Omar Sandoval
56166396ab type: move pretty print dereferencing into Type._pretty() 
Instead of ProgramObject.__format__().
 2018-07-23 20:12:09 -07:00
Omar Sandoval
98a26ad610 corereader: add CoreReader.read_c_string() 
And replace the Python implementation in ProgramObject.string_(). The
CoreReader implementation is still naive in that it reads byte-by-byte,
but this could always be improved in the future.
 2018-07-23 18:19:41 -07:00
Omar Sandoval
da140ed094 type: rename Type.is_pointer() to Type.is_pointer_operand() 2018-07-22 17:43:27 -07:00
Omar Sandoval
b70addd5ae type: get rid of unused Type._read_pretty() 2018-07-22 00:30:41 -07:00
Omar Sandoval
cab896a65b type: exclude all-zero arrays and structs from array pretty-printing 2018-07-22 00:26:10 -07:00
Omar Sandoval
e8881f9b4d cli: use terminal size as precision for ProgramObject in displayhook 2018-07-21 22:56:21 -07:00
Omar Sandoval
d7ff578f0e program: add ProgramObject.__format__() with precision support 
This gets passed along as the columns to Type._pretty().
 2018-07-21 22:54:32 -07:00
Omar Sandoval
f4bb55e359 type: support putting multiple array elements on the same line 2018-07-21 22:53:05 -07:00
Omar Sandoval
d34df7a280 helpers: add missing imports in kernel block helpers 2018-07-20 21:20:05 -07:00
Omar Sandoval
6f14d82024 memberdesignator: fix error message when missing ']' 2018-07-16 20:30:09 -07:00
Omar Sandoval
f95eb9deab Add some missing type annotations 2018-07-16 19:53:51 -07:00
Omar Sandoval
0cb3876900 tests: don't shell out to GCC for DwarfTypeIndex tests 
Instead, make a mock DwarfIndex and CompilationUnit and construct Dies
directly.
 2018-07-16 19:45:30 -07:00
Omar Sandoval
959968b4e4 dwarftypeindex: isolate pre-GCC 5.1 enum special case code 
And change the signed heuristic.
 2018-07-16 19:44:09 -07:00
Omar Sandoval
e3fa0bca93 dwarf: pass a thunk to Die instead of offset, length 
This is mostly to make it more testable.
 2018-07-16 19:43:33 -07:00
Omar Sandoval
a69a743f55 tests: fix const_anonymous_color_type 
It has negative enumerators, so it obviously must be signed.
 2018-07-16 19:42:52 -07:00
Omar Sandoval
f9976855ee Add Python coverage output to .gitignore 2018-07-16 19:42:32 -07:00
Omar Sandoval
b490f1c7bc program: micro-optimize ProgramObject.container_of_() 2018-07-15 23:55:43 -07:00
Omar Sandoval
7de73c2a21 program: micro-optimize ProgramObject.__init__() 
Save some "is None"s, use a local for real_type.
 2018-07-15 23:47:15 -07:00
Omar Sandoval
4fa82d0bac type: optimize _convert() methods 
Avoid calling isinstance(); instead, catch errors. Also use & instead of
% for truncating ints and give PointerType its own implementation.
 2018-07-15 23:22:46 -07:00
Omar Sandoval
45da5e8d35 tests: split DwarfTypeIndex tests out of TypeIndex tests 2018-07-15 18:07:36 -07:00
Omar Sandoval
a4ecbff27f Fix some minor code style spacing issues 2018-07-15 16:48:11 -07:00
Omar Sandoval
878e4017c8 type: add new CompoundType.members() 
CompoundType.members() currently returns a list of member names;
sometimes, we actually want the type and offset. So, rename members() to
member_names(), and make members() return the type and offset, using a
newly added version of functools.partial() that caches the return value.
 2018-07-15 08:08:42 -07:00
Omar Sandoval
6abb2f2402 Separate internal API from public API 
While we're here, clean up some rough edges of the API and document a
lot more.
 2018-07-14 10:20:17 -07:00
Omar Sandoval
f22ff38b28 elf: fix off-by-one in note parsing 
I copied and pasted from the name parsing but forgot to get rid of the -
1.
 2018-07-12 17:13:12 -07:00
Omar Sandoval
9273de829b type: handle anonymous types thoroughly 
There were a couple more corner cases missing: arrays of anonymous types
and bit fields of anonymous enums.
 2018-07-11 23:56:32 -07:00
Omar Sandoval
6e05f9d0b2 type: add Type.is_anonymous() 
And use it for CompoundType.__str__() and TypedefType.__str__().
 2018-07-11 22:36:37 -07:00
Omar Sandoval
51aa35bc05 type: also format typedefs of anonymous enums 2018-07-11 22:34:01 -07:00
Omar Sandoval
e18670ff3d type: support enum bit fields 2018-07-11 22:18:50 -07:00
Omar Sandoval
6fa2d68c0c type: add Type.unqualified() 2018-07-11 21:51:48 -07:00
Omar Sandoval
9b5b721838 type: format typedefs of anonymous types better 
Currently, printing, e.g.,

typedef struct {
	int counter;
} atomic_t

results in

typedef struct atomic_t

Which isn't very useful. Instead, print the former.
 2018-07-11 21:40:01 -07:00
Omar Sandoval
c58c7d30ac dwarfindex: support cyclic garbage collection 
I forgot to add tp_traverse and tp_clear.
 2018-07-11 20:18:37 -07:00
Omar Sandoval
7a45446729 Move CLI setup code into library 
This way, it can be used outside of drgn.
 2018-07-11 20:08:06 -07:00
Omar Sandoval
6a6d37c5e1 Make Program and CoreReader context managers 
This is preparation for the next change, so that a Program can clean up
after itself. The Program will close the CoreReader, and the CoreReader
will close the underlying file.
 2018-07-11 19:16:34 -07:00
Omar Sandoval
d46be4cb77 corereader: fix "could not find memory segment containing 0x(nil)" message 
PyUnicode_FromFormat()'s %p does this for some reason (and also doesn't
support %llx). We can explicitly format into a buffer, instead.
 2018-07-10 20:02:43 -07:00
Omar Sandoval
7613fe0e36 program: fix type isinstance() checks to use is_foo() 
These take enums and typedefs into account.
 2018-07-10 19:36:33 -07:00
Omar Sandoval
1c80eb468b Support running userspace programs 
We can get the same information that a core dump's NT_FILE gives us
through /proc/$PID/maps, and we can treat /proc/$PID/mem as a core file
with a single giant segment.
 2018-07-09 23:08:56 -07:00
Omar Sandoval
c2d51fe295 Support userspace program core dumps 
We only need to add a little bit of infrastructure to map variable
addresses for ASLR/shared libraries, which we find using the NT_FILE
note.
 2018-07-09 22:34:03 -07:00
Omar Sandoval
631f50a2f6 variableindex: factor DwarfVariableIndex out of KernelVariableIndex 
The DWARF functionality can be shared with userspace programs.
 2018-07-09 22:03:49 -07:00
Omar Sandoval
0190467ee6 dwarfindex: allow files without debugging information 
For userspace programs, most system libraries will not have debugging
information. This shouldn't be fatal. Instead, the caller can check
which files were in fact indexed.
 2018-07-09 21:15:42 -07:00
Omar Sandoval
000a03619d dwarfindex: add DwarfIndex.files property 2018-07-09 21:11:52 -07:00
Omar Sandoval
ca55a6f44f dwarfindex: fix resize_array() with n = 0 
realloc() can succeed and return NULL if size is 0, so check errno
instead.
 2018-07-09 20:40:53 -07:00
Omar Sandoval
43cb15d4e6 dwarfindex: allow passing paths to DwarfIndex.__init__() 
I didn't end up needing DwarfIndex.add(), so it's more convenient to
pass the paths to __init__(). The add() functionality might be useful in
the future, and it's pretty simple, so we might as well leave it in.
 2018-07-09 20:24:46 -07:00
Omar Sandoval
800ee3ec36 corereader: take fd and list of segments instead of path 
Now, we can get rid of the ELF parsing implementation in CoreReader.
Instead, we parse in ElfFile and pass the parsed information to
CoreReader.
 2018-07-09 19:12:33 -07:00
Omar Sandoval
d376b3c557 elf: pass a BinaryIO instead of a memoryview 2018-07-09 17:34:52 -07:00
Omar Sandoval
7ae295dda5 Add MemoryViewIO 
This will be used so that ElfFile can take a BufferedIOReader instead of
a memoryview.
 2018-07-09 17:03:15 -07:00
Omar Sandoval
e489c243b3 cli: support kernel vmcores 
Finally, all the infrastructure is in place for reading core dumps
instead of just the running kernel, so we can hook it up.
 2018-07-07 10:57:24 -07:00
Omar Sandoval
7ef3a71741 corereader: support parsing ELF notes 
This will be used for reading the vmcoreinfo note.
 2018-07-07 10:35:04 -07:00
Omar Sandoval
306862167d corereader: handle segments with p_filesz < p_memsz 
The extra is defined to be zero-filled.
 2018-07-06 19:28:20 -07:00