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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>
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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>
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1. testing.gyp is a gyp file, not a gypi file. It is only referenced in
“dependencies” sections. The gypi extension is used for files that are
included by an “includes” section.
2. Update paths in testing.gyp to reflect the real locations of
googletest and googlemock following their merge into a single
repository.
Change-Id: If9c356d93aa5ffda54af46fbed648baa2274dac6
Reviewed-on: https://chromium-review.googlesource.com/673404
Reviewed-by: Mike Frysinger <vapier@chromium.org>
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When enabled, adding of a new range that overlaps with an existing one can be a successful operation. The range which ends at the higher address will be shrunk down by moving its start position to a higher address so that it does not overlap anymore.
This change is required to fix http://crbug/611824. The actual fix will come in a separate CL.
R=mmandlis@chromium.org
Review URL: https://codereview.chromium.org/2029953003 .
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Adding remaining mips n64 support including stackwalker.
BUG=None
TEST=manually tested on Linux/Android
R=vapier@chromium.org
Review URL: https://codereview.chromium.org/1418453011 .
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This updates the GYP build for the processor component (on windows).
- adds/removes references to files which were added or removed from the
repository
- includes build/common.gypi in the gyp files: needed to correctly
detect the OS (I think, the generated MSVC solutions were broken
without it)
- conditionally compiles code platform-specific code for the given
platform
After this minidump processor nearly compiles with VS2013: the generated
project is correct, but some files still have compilation errors.
Disclaimer: I have not tested the GYP changes on non-windows platform,
as there does not seem to be anyone using it there.
BUG=
R=mark@chromium.org
Review URL: https://codereview.chromium.org/1643633004 .
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ACCESS_VIOLATION and IN_PAGE_ERROR both specify
read/write/dep flags and address. ACCESS_VIOLATION currently
reports these, but IN_PAGE_ERROR does not. This change makes
IN_PAGE_ERROR report this information as well, and also the
additional NTSTATUS value for the underlying cause.
Patch by bungeman@chromium.org
Review URL: https://breakpad.appspot.com/1794002/
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1441 4c0a9323-5329-0410-9bdc-e9ce6186880e
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processing upcoming implementation.
dump_context.cc and dump_object.cc added in r/1370
microdump_processor.cc and microdump_processor_unittest.cc added in
r/1372
BUG=chromium:410294
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1373 4c0a9323-5329-0410-9bdc-e9ce6186880e
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This GYP-ifies the src/processor and src/common directories on those platforms
as well. The Makefile build uses much more granular unittest executables, so
the new processor_unittests does not yet link because of multiple main() symbols,
but this will be fixed later.
Update issue 575
R=mark@chromium.org
Review URL: https://breakpad.appspot.com/10674002
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1358 4c0a9323-5329-0410-9bdc-e9ce6186880e
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