If the kernel/C library headers are old, they might not have the
fields needed for SIGSYS decoding. Add ifdef checks for that and
skip the logic entirely. Easier than adding arch-specific siginfo
structs to the codebase.
Bug: google-breakpad:791
Change-Id: Ia473e3ffa61fce4c42cf4c1e73a9df044599bc5c
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1524447
Reviewed-by: Mark Mentovai <mark@chromium.org>
Many signals in Linux support additional metadata on a per-signal
basis. We can extract that from NT_SIGINFO and pass it through
in the exception_information fields.
The current core dumper logic doesn't set exception_information
at all, so this is an improvement.
Bug: google-breakpad:791
Change-Id: I38b78d6494e9bc682441750d98ac9be5b0656f5a
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1497662
Reviewed-by: Mark Mentovai <mark@chromium.org>
The current failure message omits the underlying errno. This can
make diagnosing failures a bit difficult unless you run everything
through strace. For example:
$ core2md core /proc/self md
$ core2md core /proc/self md
Unable to generate minidump
Now we get the errno details:
Unable to generate minidump: File exists
Change-Id: I67f30879868ce4a726d5d888ee8c0a4a316b5186
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1497660
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
The current core dumper only parses NT_PRSTATUS notes. With signal
details, this note only includes three fields: signo, code, and errno.
We set exception_code to signo and exception_flag to code. The errno
value isn't set by the kernel, so there's no need to save it.
However, we never fill in exception_address which means all converted
crashes look like they happen at address 0. This implies a NULL jump
which is usually not the case, so it's just confusing. The prstatus
structure doesn't offer anything directly that tracks this.
Starting with linux-3.7, the kernel writes out the full siginfo
structure in the NT_SIGINFO note. So lets support that to pull out
si_addr which, for a bunch of common signals, is the value we want in
exception_address.
The size of the siginfo_t structure should be locked to 128 bytes at
build time for all architectures, so this should hopefully be stable.
Bug: google-breakpad:790
Change-Id: I458bad4787b1a8b73fad8fe068e9f23bec957599
Reviewed-on: https://chromium-review.googlesource.com/c/1497661
Reviewed-by: Mark Mentovai <mark@chromium.org>
Certain minidumps for 32-bit crashes have the upper 32-bit of the crash
address (which is a 64-bit value) set to non-zero values. This caused a
crash address with more than 32-bits to be printed out for minidumps of
32-bit architectures. This patch masks out those bits when reading the
raw minidump data to ensure this doesn't happen anymore.
Bug: google-breakpad:783
Change-Id: Ieef6dff759fd0ee2efc47c4c4a3cf863a48f0659
Reviewed-on: https://chromium-review.googlesource.com/c/1427819
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
This affects the output of tools like minidump_stackwalk which currently
print out the hexadecimal representation of the architecture instead of
the "arm64" string.
BUG=780
Change-Id: Id1d9d65fa5f3509c8c6580e2e3042f7d682b52be
Reviewed-on: https://chromium-review.googlesource.com/c/1412004
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Eventually, I want to remove the current version of
SetFirstChanceHandler. That is why I changed the name of the current
callback type to FirstChanceHandlerDeprecated.
I also made sure that it is not possible to have two different
FirstChanceHandlers set at the same time.
This is the first of a set of CLs to clean up the API between Chrome,
BreakPad, and V8. See more information in the tracking bug.
R=mark@chromium.org
Bug: chromium:921971
Change-Id: Ia8c2fd9bd875c36dd7ae8bb4a02e538556bc67a1
Reviewed-on: https://chromium-review.googlesource.com/c/1411776
Reviewed-by: Mark Mentovai <mark@chromium.org>
The high_pc is an address and has already been read from .debug_addr
before being passed into FuncHandler::ProcessAttributeUnsigned.
Bug:870908
Change-Id: I950098e360b5193f26bf767b8fa0a5f9d59e66ce
Reviewed-on: https://chromium-review.googlesource.com/1178760
Reviewed-by: Mark Mentovai <mark@chromium.org>
This enables the DWARF reader to properly parse DW_AT_ranges attributes
in compilation units and functions. Code covered by a function is now
represented by a vector of ranges instead of a single contiguous range
and DW_AT_ranges entries are used to populate it. All the code and tests
that assumed functions to be contiguous entities has been updated to
reflect the change. DW_AT_ranges attributes found in compilation units
are parsed but no data is generated for them as it is not currently needed.
BUG=754
Change-Id: I310391b525aaba0dd329f1e3187486f2e0c6d442
Reviewed-on: https://chromium-review.googlesource.com/1124721
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
This struct matches the layout defined by Microsoft and replaces
Breakpad's MDRawContextARM64_Old. This CL updates the processor to
understand either the old or new structs, but clients continue to write
the old structs.
Change-Id: I8dedd9ddb2ec083b802723b9ac87beb18d98edbd
Reviewed-on: https://chromium-review.googlesource.com/1155938
Reviewed-by: Mark Mentovai <mark@chromium.org>
dump_syms produces incomplete CFI info on iOS because it doesn't support
converting compact unwind to Breakpad symbols. Attempting to use
incomplete CFI can result in infinte stack traces.
Bug: google-breakpad:764
Change-Id: Id042aa515d17928cb5503a79038607d95c56238d
Reviewed-on: https://chromium-review.googlesource.com/1128252
Reviewed-by: Ivan Penkov <ivanpe@chromium.org>
When DW_AT_MIPS_linkage_name doesn't demangle, breakpad currently throws
the symbol completely, but in some cases, there is no DW_AT_name or
DW_AT_abstract_origin to figure out a name, and the raw value from
DW_AT_MIPS_linkage_name is still better than nothing. Fall back to that
in when there is nothing else.
R=ted@mielczarek.org
Change-Id: I5cc7580244f2b99f5f1f279d09b904031cae1a37
Reviewed-on: https://chromium-review.googlesource.com/1082176
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
The variables in the CL are not initialized. Even if it's safe not to
initialize them here, MSAN doesn't know that.
Bug: 394028
Change-Id: I597a7d76aa19d5789decd0f85150fa31c9655269
Reviewed-on: https://chromium-review.googlesource.com/1001573
Reviewed-by: Lei Zhang <thestig@chromium.org>
