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+# Inherit this class when you want to allow Mozilla Socorro to link Breakpad's
+# stack trace information to the correct source code revision.
+# This class creates a new version of the symbol file (.sym) created by
+# Breakpad. The absolute file paths in the symbol file will be replaced by VCS,
+# branch, file and revision of the source file. That information facilitates the
+# lookup of a particular source code line in the stack trace.
+#
+# Use example:
+#
+# BREAKPAD_BIN = "YourBinary"
+# inherit socorro-syms
+#
+
+# We depend on Breakpad creating the original symbol file.
+inherit breakpad
+
+PACKAGE_PREPROCESS_FUNCS += "symbol_file_preprocess"
+PACKAGES =+ "${PN}-socorro-syms"
+FILES_${PN}-socorro-syms = "/usr/share/socorro-syms"
+
+
+python symbol_file_preprocess() {
+
+ package_dir = d.getVar("PKGD")
+ breakpad_bin = d.getVar("BREAKPAD_BIN")
+ if not breakpad_bin:
+ package_name = d.getVar("PN")
+ bb.error("Package %s depends on Breakpad via socorro-syms. See "
+ "breakpad.bbclass for instructions on setting up the Breakpad "
+ "configuration." % package_name)
+ raise ValueError("BREAKPAD_BIN not defined in %s." % package_name)
+
+ sym_file_name = breakpad_bin + ".sym"
+
+ breakpad_syms_dir = os.path.join(
+ package_dir, "usr", "share", "breakpad-syms")
+ socorro_syms_dir = os.path.join(
+ package_dir, "usr", "share", "socorro-syms")
+ if not os.path.exists(socorro_syms_dir):
+ os.makedirs(socorro_syms_dir)
+
+ breakpad_sym_file_path = os.path.join(breakpad_syms_dir, sym_file_name)
+ socorro_sym_file_path = os.path.join(socorro_syms_dir, sym_file_name)
+
+ create_socorro_sym_file(d, breakpad_sym_file_path, socorro_sym_file_path)
+
+ arrange_socorro_sym_file(socorro_sym_file_path, socorro_syms_dir)
+
+ return
+}
+
+
+def run_command(command, directory):
+
+ (output, error) = bb.process.run(command, cwd=directory)
+ if error:
+ raise bb.process.ExecutionError(command, error)
+
+ return output.rstrip()
+
+
+def create_socorro_sym_file(d, breakpad_sym_file_path, socorro_sym_file_path):
+
+ # In the symbol file, all source files are referenced like the following.
+ # FILE 123 /path/to/some/File.cpp
+ # Go through all references and replace the file paths with repository
+ # paths.
+ with open(breakpad_sym_file_path, 'r') as breakpad_sym_file, \
+ open(socorro_sym_file_path, 'w') as socorro_sym_file:
+
+ for line in breakpad_sym_file:
+ if line.startswith("FILE "):
+ socorro_sym_file.write(socorro_file_reference(d, line))
+ else:
+ socorro_sym_file.write(line)
+
+ return
+
+
+def socorro_file_reference(d, line):
+
+ # The 3rd position is the file path. See example above.
+ source_file_path = line.split()[2]
+ source_file_repo_path = repository_path(
+ d, os.path.normpath(source_file_path))
+
+ # If the file could be found in any repository then replace it with the
+ # repository's path.
+ if source_file_repo_path:
+ return line.replace(source_file_path, source_file_repo_path)
+
+ return line
+
+
+def repository_path(d, source_file_path):
+
+ if not os.path.isfile(source_file_path):
+ return None
+
+ # Check which VCS is used and use that to extract repository information.
+ (output, error) = bb.process.run("git status",
+ cwd=os.path.dirname(source_file_path))
+ if not error:
+ # Make sure the git repository we just found wasn't the yocto repository
+ # itself, i.e. the root of the repository we're looking for must be a
+ # child of the build directory TOPDIR.
+ git_root_dir = run_command(
+ "git rev-parse --show-toplevel", os.path.dirname(source_file_path))
+ if not git_root_dir.startswith(d.getVar("TOPDIR")):
+ return None
+
+ return git_repository_path(source_file_path)
+
+ # Here we can add support for other VCSs like hg, svn, cvs, etc.
+
+ # The source file isn't under any VCS so we leave it be.
+ return None
+
+
+def is_local_url(url):
+
+ return \
+ url.startswith("file:") or url.startswith("/") or url.startswith("./")
+
+
+def git_repository_path(source_file_path):
+
+ import re
+
+ # We need to extract the following.
+ # (1): VCS URL, (2): branch, (3): repo root directory name, (4): repo file,
+ # (5): revision.
+
+ source_file_dir = os.path.dirname(source_file_path)
+
+ # (1) Get the VCS URL and extract the server part, i.e. change the URL from
+ # gitolite@git.someserver.com:SomeRepo.git to just git.someserver.com.
+ source_long_url = run_command(
+ "git config --get remote.origin.url", source_file_dir)
+
+ # The URL could be a local download directory. If so, get the URL again
+ # using the local directory's config file.
+ if is_local_url(source_long_url):
+ git_config_file = os.path.join(source_long_url, "config")
+ source_long_url = run_command(
+ "git config --file %s --get remote.origin.url" % git_config_file,
+ source_file_dir)
+
+ # If also the download directory redirects to a local git directory,
+ # then we're probably using source code from a local debug branch which
+ # won't be accessible by Socorro.
+ if is_local_url(source_long_url):
+ return None
+
+ # The URL can have several formats. A full list can be found using
+ # git help clone. Extract the server part with a regex.
+ url_match = re.search(".*(://|@)([^:/]*).*", source_long_url)
+ source_server = url_match.group(2)
+
+ # (2) Get the branch for this file.
+ source_branch_list = run_command("git show-branch --list", source_file_dir)
+ source_branch_match = re.search(".*?\[(.*?)\].*", source_branch_list)
+ source_branch = source_branch_match.group(1)
+
+ # (3) Since the repo root directory name can be changed without affecting
+ # git, we need to extract the name from something more reliable.
+ # The git URL has a repo name that we could use. We just need to strip off
+ # everything around it - from gitolite@git.someserver.com:SomeRepo.git/ to
+ # SomeRepo.
+ source_repo_dir = re.sub("/$", "", source_long_url)
+ source_repo_dir = re.sub("\.git$", "", source_repo_dir)
+ source_repo_dir = re.sub(".*[:/]", "", source_repo_dir)
+
+ # (4) We know the file but want to remove all of the build system dependent
+ # path up to and including the repository's root directory, e.g. remove
+ # /home/someuser/dev/repo/projectx/
+ source_toplevel = run_command(
+ "git rev-parse --show-toplevel", source_file_dir)
+ source_toplevel = source_toplevel + os.path.sep
+ source_file = source_file_path.replace(source_toplevel, "")
+
+ # (5) Get the source revision this file is part of.
+ source_revision = run_command("git rev-parse HEAD", source_file_dir)
+
+ # Assemble the repository path according to the Socorro format.
+ socorro_reference = "git:%s/%s:%s/%s:%s" % \
+ (source_server, source_branch,
+ source_repo_dir, source_file,
+ source_revision)
+
+ return socorro_reference
+
+
+def arrange_socorro_sym_file(socorro_sym_file_path, socorro_syms_dir):
+
+ import re
+
+ # Breakpad's minidump_stackwalk needs a certain directory structure in order
+ # to find correct symbols when extracting a stack trace out of a minidump.
+ # The directory structure must look like the following.
+ # YourBinary/<hash>/YourBinary.sym
+ # YourLibrary.so/<hash>/YourLibrary.so.sym
+ # To be able to create such structure we need to extract the hash value that
+ # is found in each symbol file. The header of the symbol file looks
+ # something like this:
+ # MODULE Linux x86 A079E473106CE51C74C1C25AF536CCD30 YourBinary
+ # See
+ # http://code.google.com/p/google-breakpad/wiki/LinuxStarterGuide
+
+ # Create the directory with the same name as the binary.
+ binary_dir = re.sub("\.sym$", "", socorro_sym_file_path)
+ if not os.path.exists(binary_dir):
+ os.makedirs(binary_dir)
+
+ # Get the hash from the header of the symbol file.
+ with open(socorro_sym_file_path, 'r') as socorro_sym_file:
+
+ # The hash is the 4th argument of the first line.
+ sym_file_hash = socorro_sym_file.readline().split()[3]
+
+ # Create the hash directory.
+ hash_dir = os.path.join(binary_dir, sym_file_hash)
+ if not os.path.exists(hash_dir):
+ os.makedirs(hash_dir)
+
+ # Move the symbol file to the hash directory.
+ sym_file_name = os.path.basename(socorro_sym_file_path)
+ os.rename(socorro_sym_file_path, os.path.join(hash_dir, sym_file_name))
+
+ return
+
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