Stackwalk can't recover caller's register X30($LR) value by STACK CFI info.
This will lead unwinding stop immediately when fallback to frame pointer unwinder.
This PR will use try to use second last frame to recover register X30($LR) by frame pointer.
And we will give up correction if STACK CFI info doesn't agree with frame pointer info.
Bug: https://bugs.chromium.org/p/google-breakpad/issues/detail?id=808
Change-Id: I50649e3398e268b02ff297e83db21d05705c2a2d
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1992641
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
When __DARWIN_OPAQUE_ARM_THREAD_STATE64 is set (by default when building
for arm64e), fp, lr, sp, pc, and flags (but not x or cpsr) in thread
state are prepended with "__opaque" and intended to be accessed via
supplied getters which may also authenticate pointers. We don't want to
authenticate those pointers (since we expect they may be invalid and
want to recover those invalid values) so access them directly.
Bug: b/140375065
Change-Id: Ibe6c1dbfb5d68a9d350614445fa06d48873f8549
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1986868
Reviewed-by: Mark Mentovai <mark@chromium.org>
I have a project where we are trying to include breakpad as a git
submodule. The only problem getting it to build with ndk-build is that
the linux_syscall_support.h header is missing. Normally, this header
would be downloaded by the depot_tools. But we cannot install
depot_tools on our CI machines.
So, we would like to include the header as a separate submodule in our
repo. The only change we would need to make to breakpad to make that
work is to add this optional variable to the C header search path. In
the normal case, this variable will not be set and nothing will be
different. But we can set the variable to allow us to build without
installing depot_tools.
I have manually tested this using a separate project that links to
breakpad in this way.
Change-Id: Id116b2af1c1ba0a08464c213d8982b24a1821ee7
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1930179
Reviewed-by: Mark Mentovai <mark@chromium.org>
DW_AT_specification and DW_AT_abstract_origin attributes carry
references to other DIEs. Nothing prevents the DIEs referred to from
appearing later in .debug_info than the DIE containing the referring
attribute, but dump_syms incompletly implemented its handling of these
references, and was only able to resolve them when they were
back-references.
This will fix the chronic warnings produced by dump_syms of the form:
dump_syms: the DIE at offset <offset> has a {DW_AT_specification,
DW_AT_abstract_origin} attribute referring to the die at offset
<offset>, which either was not marked as {a declaration, an inline}, or
comes later in the file
Patch by Greg Clayton
Bug: breakpad:441
Change-Id: I98957d64a234c22afb6d0153f1bdc09e6a600b1d
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1946706
Reviewed-by: Mark Mentovai <mark@chromium.org>
Fix compilation of http_upload.cc with Windows gcc after 548ca6e3, by
moving the definition of GetFileContents(), so it comes after the
definition of WideToMBCP(), which it uses (under !_MSC_VER).
common/windows/http_upload.cc: In function ‘bool {anonymous}::GetFileContents(const wstring&, std::vector<char>*)’:
common/windows/http_upload.cc:80:19: error: ‘WideToMBCP’ was not declared in this scope
Change-Id: I1646b39263e97bbf3bd8cb1ae209be238023110f
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1928929
Reviewed-by: Mike Frysinger <vapier@chromium.org>
This code indicates termination under “kill” semantics due to a module’s
code signature becoming invalid.
Bug: chromium:1023239
Change-Id: I3d453af9ef6c6925edcf9c08dbd78e563877522f
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1930177
Reviewed-by: Robert Sesek <rsesek@chromium.org>
The file GTMLogger shipped with breakpad is a copy of the version
from google_toolbox_for_mac. Having uploader.mm depend on GTMLogger
causes pain to iOS projects that want to integrate both breakpad
and google_toolbox_for_mac.
Since the file uploader.mm mixed uses of fprintf and GTMLogger to
log errors and warning, convert it to only use fprintf to stderr.
Bug: none
Change-Id: I68313ccf6951676a2859f44225281813722096ba
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1911755
Reviewed-by: Mark Mentovai <mark@chromium.org>
A recent commit converted some source from C to C++. Chrome has
checks against unannotated switch case fallthroughs in C++ code, so the
converted source needs annotations.
Bug: 990190
Change-Id: Ib92435b4877be936f837928a70b552ec4975d42a
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1898429
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
This reverts commit 07411862ea.
We were a bit overzealous in removing “register” here. Both clang and
GCC correctly disallow “register” as a storage class specifier in C++17
mode by producing an error in ordinary use. However, they require
“register” to be specified for explicit register variables, and do not
produce an error in this case.
Change-Id: I223f2652c6da4215d6e8788d902e767c94b8c29d
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1894875
Reviewed-by: Mark Mentovai <mark@chromium.org>
3e56ef9d changed dump_syms to set the module name from DT_SONAME
expecting that clients were already using DT_SONAME when it was
present. The Breakpad client previously only used DT_SONAME as the name
for a module if it detected that it was likely mapped from a zip file.
This patch updates the Breakpad Linux client to always use the
DT_SONAME in minidumps if it's present.
Also included are changes to address comments that were missed from
that review.
Bug: 1016924
Change-Id: I4aae8c05e6793d4b0598049a8964ddd4cb0c6194
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1889231
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Make the following consistent within the file:
- 0x...ULL for unsigned literals.
- On pointers, put the asterisk with the type.
Context: Made a previous change and saw a mix of styles. Make it
consistent for the sake of visual consistency.
Bug: None
Change-Id: I0f80aedc0ca0295be3c70bd88822cbb82d0415ba
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1888434
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Partitioned libraries generated with lld and llvm-objcopy currently
contain a superset of debug information, beyond what applies to the
library itself. This is because objcopy cannot split up debug
information by partition - instead, it places a copy of all debug
information into each partition.
In lieu of potential future support for lld or objcopy becoming able to
split up debug information, let dump_syms do the next best thing:
- Find the address ranges of all PT_LOAD segments in the lib.
- Supply these to the Module being generated.
- Filter additions to the Module based on these ranges.
Bug: 990190
Change-Id: Ib5f279f42e3f6ea79eed9665efbcc23c3c5d25dc
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1884699
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
The Breakpad and Crashpad clients will use an object's DT_SONAME as
the name for a module if it exists. Previously, linux dump_syms would
assume the basename of an input elf file matches that value, causing
symbol lookups to fail if they were mismatched. This patch updates
dump_syms to use DT_SONAME as the module name, if present.
Bug: 1016924
Change-Id: I5eff0cf06c703841df3fb552cb5a8e1e50a20c64
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1876763
Reviewed-by: Mike Frysinger <vapier@chromium.org>
"register" as a storage class specifier has been deprecated since C++11,
and has been removed from C++17 while remaining a reserved word. See
C++17 5.11 and C.4.3.
Change-Id: I2dbab8a7061cb680d902644d39ea1a7fbc930e5c
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1749329
Reviewed-by: Mike Frysinger <vapier@chromium.org>
A .dSYM may validly contain a __DWARF segment without any __debug_info
section. This can occur for Chromium Framework in a component build of
Chromium, because in that case, all of the code is in other libraries
that Chromium Framework depends on.
This was previously tested by an assertion, but the assertion did not
trigger in NDEBUG (release) builds. In NDEBUG builds, this condition
would lead to an out-of-bounds read, detected by AddressSanitizer.
Instead of an assertion, the check is now always done at runtime.
Instead of being fatal, it's now just a warning, because it's been
established that __DWARF without __debug_info can occur.
(In the Chromium case, it remains pointless to run dump_syms via the
"chrome_dump_syms" target on a component build, as it'll only attempt to
symbolize Chromium Framework, and not any of the libraries that Chromium
Framework depends on that actually contain the code.)
Bug: chromium:991206
Change-Id: I6c9c75f0be7901813e3eaae54aff38c1afe73ca9
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1741610
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Since target_ptr is of type uint16_t* already, we don't need to scale
the byte count as the language does that for us. If it were void*, we
would need this code, but it's not.
In practice it's probably not a big deal due to how we preallocated
memory: when converting UTF8->UTF16, we'd reserve the same number of
code units, and UTF8 takes more code units per codepoint than UTF16,
so the UTF16 vector is always oversized.
When converting UTF32->UTF16, we also reserve the same number of
code units, but since one UTF32 code unit could require two UTF16
code units (for U+10000 codepoints and higher), we would probably
corrupt memory in the process. The APIs in this module don't seem
to take into account that range in general, so for now I'm only
fixing the memory corruption.
Bug: google-breakpad:768
Change-Id: Ibfaea4e866733ff8d99b505e72c500bd40d11a74
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1732888
Reviewed-by: Mark Mentovai <mark@chromium.org>
Pointer authentication codes are used to validate pointers against
accidental or malicious modification by storing a hash of the address
and a secret value in the pointer's unused, upper bits. The exact
bits used may vary by implementation and depend on the size of the
virtual address space of the target system, and whether other tagged
pointer features are in use.
Apple has implemented PACs in the Apple A12.
https://developer.apple.com/documentation/security/preparing_your_app_to_work_with_pointer_authentication
The documented method of stripping PACs from a pointer is to call
ptrauth_strip(), which ultimately emits an `xpaci` instruction, but
this option isn't available to the Breakpad processor not running on
the device. Instead, this patch selects likely address bits from
link register values by examining the address range of loaded modules.
Change-Id: I054bd1a03605719937fc85dcc8d8b9fe927f44be
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1713650
Reviewed-by: Mark Mentovai <mark@chromium.org>
Now decoding the OS name and exception codes for Fuchsia. Still not decoding exception flags (can be added later, if needed).
Change-Id: If66cb000828be18f0c1b35d1b1f52b3ca3e1fd67
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1699049
Reviewed-by: Mark Mentovai <mark@chromium.org>
- I think I previously fixed this for dump_syms, but must have missed
the symupload one because it didn't have a gn target.
Change-Id: Ibf4daa0dc874f329c2ee7c7b3d4de1ee6bc68d13
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1682717
Reviewed-by: Mark Mentovai <mark@chromium.org>
- This is a workaround to an issue with gn/clang build of Windows
symbol converter where dbghelp.dll is loaded from system32/syswow64
instead of alongside the process exe.
- Why do we care where dbghelp.dll is loaded from? Two considerations:
1. dbghelp.dll will only load symsrv.dll from the directory where it
resides.
2. symsrv.dll requires a file called "symsrv.yes" to be in the
directory where it resides in order to work with MS symbol stores.
Therefore if we load dbghelp.dll from syswow64, then we must also
ensure there is a symsrv.dll and symsrv.yes file in syswow64.
Change-Id: Ia283a2c11e276c855a48157aa7be77897af4b02e
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1680670
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
- Only 64-bit PEs supported.
- Re-add some scripts that were missed in initial move of code.
- Change msdia120.dll dependency to msdia140.dll.
- Add tests for Intel, AMD, and NVidia Microsoft Symbol Stores.
- Windows symbol converter now attempts to fall back to PE-only metadata
when it fails to locate a PDB.
- Remove the 'binary' folder under converter_exe. Need to think more
about how a deployment should look and what tool(s) to use in creating
one.
Change-Id: I52e42cbe5e759874a25114c2483e8b50d73fdf77
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1670098
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
- Add a #define to testing.gyp to avoid warnings about TR1 deprecation.
- PESourceLineWriter now reads debug_file from CodeView record instead
of using code_file value.
- Updated PE-only MD reading unit test.
Change-Id: Ib4e6201df3e3fd651e160f310584b5a67b16c842
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1668347
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
- Rename two files from '.cpp' to '.cc' and insert missing comma in
between lines in source files list.
Change-Id: I169a738b565f52292cb0292b34c4397e9dc05370
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1666351
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
- First step, this is just enough to get it generating a msbuild
project with GYP, which in turn can build the executable.
- Tests need to be redesigned because there isn't an available server.
Change-Id: I45440fd32b3ede29666c127703bcd441f0e4288e
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1661134
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
Upstream googletest is dropping autotools support and the cmake
installer does not provide gtest-config.
BUG=chromium:940320
TEST=FEATURES=test emerge-lakitu google-breakpad
Change-Id: Icd51ffc48b39c24eebc27cc023e74a77e592de3e
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1660893
Reviewed-by: Mike Frysinger <vapier@chromium.org>
- Implement in common_windows_lib-- added class "PESourceLineWriter".
- Add command-line switch to tell dump_syms to use PESourceLineWriter.
Symbol data created this way will contain information to correlate the
module with ones found in minidumps, along with frame info that allows
much higher quality stack-walking in those minidumps.
- Significant refactor of PDBSourceLineWriter-- all code concerned with
extracting metadata from PE files has been moved into utility
functions. This is to allow sharing of this functionality with newly-
added PESourceLineWriter.
- Added a unit test to dump_syms for the PE-only scenario.
Change-Id: If0855f05d424d32d23f484995be5f34232179a37
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1525325
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
ELF modules are loaded in memory in several, possibly discontiguous,
segments. If the holes between segments are large enough, other things,
possibly other ELF modules may be mapped in that space. Crashpad
records the range of modules as the base address of the lowest mapped
segment to the high address of the highest mapped segment. This means
that when one module is mapped into a hole in another, it appears to
the Breakpad processor as overlapping modules. Module ranges are
relevant to the Breakpad processor during stackwalking for identifying
which module a particular program counter belongs to (i.e. mapping the
address to a module's text segment). This patch addresses this issue of
overlapping modules by truncating the range of the module with the
lower base address. A typical module's text segment is the first loaded
segment which would leave the text segment range unaffected. Module
producers can restrict the size of holes in their ELF modules with the
flag "-Wl,-z,max-page-size=4096", preventing other modules from being
mapped in their address range.
Properly contemplating ELF module address ranges would require
extensions to the minidump format to encode any holes.
crbug.com/crashpad/298
This patch also renames the concept of "shrinking down" (which
truncated the upper of two overlapping ranges) to "truncate upper".
Change-Id: I4599201f1e43918db036c390961f8b39e3af1849
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1646932
Reviewed-by: Mark Mentovai <mark@chromium.org>
