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April 11, 2020 16:57
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| # Downloads and unpacks (in subdirs of the current directory) all of the | |
| # Debian source packages associated with the *-dbgsym and *-dbg packages whose | |
| # symbols are referenced by the specified program ('/usr/bin/someprogram' in | |
| # the snippet below). Takes pains to ensure the downloaded source packages are | |
| # at the exact same version number as the corresponding *-dbgsym/*-dbg | |
| # packages. | |
| # | |
| # Assumes you are in the directory beneath which you would like the sources to | |
| # be unpacked (by 'apt-get source'). Each unique package will have a separate | |
| # subdirectory. We are not clever about avoiding duplicates, but 'apt-get source' | |
| # already is. | |
| # | |
| # Motivation: | |
| # ----------- | |
| # Helps prepare for a gdb(1) debugging session for a given program (assuming | |
| # that program was installed by the Debian packaging system). Easier than | |
| # manually tracking down all dependencies manually. For such work, you need | |
| # the debug symbols for all dependencies (provided in the *-dbgsym or *-dbg | |
| # packages) and also the source code (the part fetched by this gist). | |
| # | |
| # For the most part, gdb(1) will automatically find the debug symbols from the | |
| # installed *-dbgsym and *-dbg packages, but you will need to use one or more | |
| # gdb 'directory' commands to tell it where the source code lives (for use by | |
| # the gdb 'list' command, and similar). | |
| # | |
| # Background context: | |
| # ------------------- | |
| # The 'find-dbgsym-packages(1)' program comes from the 'debian-goodies' Debian | |
| # package, but its default behavior (as provided by debian-goodies-0.84) is to | |
| # only print the names of *-dbgsym and *-dbg packages that are not already | |
| # installed. Internally, it is using the `eu-unstrip' program (provided by the | |
| # 'elfutils' package) to decide whether or not to print the *-dbgsym/*-dbg | |
| # package name for a given dependency by parsing the output of this | |
| # invocation: | |
| # | |
| # eu-unstrip --list-only --executable | |
| # | |
| # The 'find-dbgsym-package' program explicitly filters out the names of the | |
| # packages when it detects their associated debug symbols are already present. | |
| # | |
| # This gist uses a quick 'n dirty modified version that does not do that | |
| # filtering out: | |
| # | |
| # $ diff tt/find-dbgsym-packages tt/find-dbgsym-packages-ALJUNK-HACKED-TO-NOT-IGNORE-ALREADY-INSTALLED-DBGSYM-PACKAGES | |
| # 116,118c116,118 | |
| # < if ($debug ne '-') { | |
| # < next; | |
| # < } | |
| # --- | |
| # > # if ($debug ne '-') { | |
| # > # next; | |
| # > # } | |
| # | |
| # Single line, for easier copy/pasting: | |
| # | |
| $ ./tt/find-dbgsym-packages-ALJUNK-HACKED-TO-NOT-IGNORE-ALREADY-INSTALLED-DBGSYM-PACKAGES /usr/bin/someprogram | tr ' ' '\n' | while read -r pkg_dbgsym; do pkg_raw=$(echo "${pkg_dbgsym}" | sed -e 's/^\(.\{1,\}\)[-]\(dbg\|dbgsym\)$/\1/'); echo $pkg_raw; done | while read -r pkg; do iver=$(dpkg-query --show --showformat '${Version}' "${pkg}"); ( set -x; test -d "./${pkg}-${iver}" || apt-get source ${pkg}=${iver} && sleep 2); done | |
| # Multiple lines, for better readability here: | |
| # | |
| $ ./tt/find-dbgsym-packages-ALJUNK-HACKED-TO-NOT-IGNORE-ALREADY-INSTALLED-DBGSYM-PACKAGES /usr/bin/someprogram \ | |
| > | tr ' ' '\n' \ | |
| > | while read -r pkg_dbgsym; do | |
| > pkg_raw=$(echo "${pkg_dbgsym}" \ | |
| > | sed -e 's/^\(.\{1,\}\)[-]\(dbg\|dbgsym\)$/\1/' \ | |
| > );\ | |
| > echo $pkg_raw ;\ | |
| > done \ | |
| > | while read -r pkg; do | |
| > iver=$(dpkg-query --show --showformat '${Version}' "${pkg}"); | |
| > ( set -x; \ | |
| > test -d "./${pkg}-${iver}" || apt-get source ${pkg}=${iver} && sleep 2 | |
| > );\ | |
| > done |
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