| Commit message (Collapse) | Author | Age |
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Changes:
* Move msg to the end of errExit (right before perror(3p))
* Include the full file path (within the repository)
* Add "()" to function name for clarity
Before:
Error malloc: main.c:123 main: Cannot allocate memory
After:
Error src/firejail/main.c:123 main(): malloc: Cannot allocate memory
Note: This clarifies which is the exact file that the error message
comes from, as there are many source files with the same name. For
example:
$ git ls-files 'src/*/main.c' | wc -l
20
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To make them less confusing, as they are extra dependencies, not files
that are specific to the module.
Commands used to search and replace:
$ git grep -IFlz -e 'MOD_HDRS' -e 'MOD_OBJS' -- src |
xargs -0 -I '{}' sh -c "printf '%s\n' \"\$(sed \
-e 's/MOD_HDRS/EXTRA_HDRS/g' \
-e 's/MOD_OBJS/EXTRA_OBJS/g' '{}')\" >'{}'"
Added on commit f5b1ccaad ("makefiles: move extra deps into new MOD
vars", 2022-05-07) / PR #5478.
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To reduce the amount of boilerplate in the makefiles.
This amends commit 9789c263a ("build: disable all built-in implicit make
rules", 2023-06-21) / PR #5864.
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Use `make -r` to reduce unnecessary filesystem lookups.
Overall, this appears to reduce the amount of implicit rule searches by
~93.3% (~97.5% compared to a8f01a383) for the default build and by
~83.3% (~99.3% compared to a8f01a383) for the "man" target (as an
example):
$ git show --pretty='%h %ai %s' -s
a8f01a383 2023-06-20 05:26:23 +0000 Merge pull request #5859 from kmk3/build-remove-retpoline
$ ./configure >/dev/null
$ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l
6798
$ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l
1085
# (in the previous commit)
$ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l
2535
$ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l
42
# (with this commit applied)
$ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l
170
$ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l
7
Environment: GNU make 4.4.1-2 on Artix Linux.
Note: According to make(1p) in POSIX.1-2017, "If .SUFFIXES does not have
any prerequisites, the list of known suffixes shall be cleared.", while
"The result of setting MAKEFLAGS in the Makefile is unspecified."
Commands used to search and replace:
$ git ls-files -z -- '*Makefile*' | xargs -0 -I '{}' sh -c \
"printf '%s\n' \"\$(sed -E \
's/^(.SUFFIXES:)/\1\nMAKEFLAGS += -r\n/' '{}')\" >'{}'"
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Clear `.SUFFIXES:` to reduce unnecessary filesystem lookups.
Overall, this appears to reduce the amount of implicit rule searches by
~62% for the default build and by ~96% for the "man" target (as an
example):
$ git checkout master >/dev/null 2>&1
$ git show --pretty='%h %ai %s' -s
a8f01a383 2023-06-20 05:26:23 +0000 Merge pull request #5859 from kmk3/build-remove-retpoline
$ ./configure >/dev/null
$ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l
6798
$ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l
1085
# (with this commit applied)
$ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l
2535
$ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l
42
Environment: GNU make 4.4.1-2 on Artix Linux.
Commands used to search and replace:
$ git ls-files -z -- '*Makefile*' | xargs -0 -I '{}' sh -c \
"printf '%s\n' \"\$(sed '1s/^/.SUFFIXES:\n/' '{}')\" >'{}'"
See also commit f48886f25 ("build: mark most phony targets as such",
2023-02-01) / PR #5637.
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The following makefiles are nearly identical, except for the main target
name and for any extra headers that they might use:
* src/libpostexecseccomp/Makefile
* src/libtrace/Makefile
* src/libtracelog/Makefile
So move all of their (duplicated) code into a new src/so.mk file, and
add an include of src/so.mk, which leaves only variables, and the
includes of config.mk and src/so.mk in place.
With this commit, CFLAGS and LDFLAGS are only defined/changed in the
following files:
* config.mk.in
* src/common.mk
* src/so.mk
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Put the main target name into a new SO variable, put SO into a new
TARGET variable, make "all" depend on `$(TARGET)` and replace every
other occurrence of the main target name with `$(SO)`.
On the makefiles that build shared objects, to make them more similar.
With this commit, all of their targets are identical.
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To make the makefiles more similar.
That is, add the following new variables:
* MOD_HDRS
* MOD_SRCS
* MOD_OBJS
And move existing module-specific header and object dependencies into
`MOD_HDRS` and `MOD_OBJS`, respectively. `MOD_SRCS` is added mostly for
symmetry/consistency.
Note: Use `MOD_` as a prefix instead of `EXTRA_` to avoid confusion, as
the latter is currently used for global variables (such as
`EXTRA_CFLAGS`), as opposed to module-specific variables.
Note2: Add them directly into the HDRS/SRCS/OBJS variables to avoid
cluttering the existing recipes with an extra variables unnecessarily.
This also allows, for example, referencing all of the object
dependencies with `$<` if `$(OBJS)` is the first dependency (at least in
GNU make).
Note3: Since HDRS/SRCS/OBJS use simple assignment (through `:=`), the
MOD variables should appear before including src/common.mk (or
src/so.mk).
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Use immediate expansion of the right-hand side (with `:=`) to set the
variables to the output of the commands rather than to the (text of the)
commands themselves.
This should prevent deferred/lazy evaluation, which is something that
might potentially result in the relevant files being looked up each time
that HDRS and SRCS are evaluated.
Commands used to search and replace:
git grep -Ilz '^SRCS' -- src | xargs -0 -I '{}' \
sh -c "printf '%s\n' \"\$(sed \
-e 's/^HDRS =/HDRS :=/' \
-e 's/^SRCS =/SRCS :=/' \
-e 's/^OBJS =/OBJS :=/' '{}')\" >'{}'"
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To HDRS and SRCS, respectively.
To be more consistent with the OBJS variable.
Misc: These names also appear to be more common from the makefiles that
I've seen.
Commands used to search and replace:
git grep -IFlz -e H_FILE_LIST -e C_FILE_LIST -- src |
xargs -0 -I '{}' sh -c "printf '%s\n' \"\$(sed \
-e 's/^H_FILE_LIST *=/HDRS =/' \
-e 's/\$(H_FILE_LIST)/\$(HDRS)/g' \
-e 's/^C_FILE_LIST *=/SRCS =/' \
-e 's/\$(C_FILE_LIST:/\$(SRCS:/g' \
'{}')\" >'{}'"
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It is unclear what its intended purpose would be. Example:
$ cat Makefile
OBJS = a b c
BINOBJS = $(foreach file, $(OBJS), $file)
all:
printf '"%s"\n' "$(BINOBJS)"
$ make
printf '"%s"\n' " ile ile ile"
" ile ile ile"
Added on commit 137985136 ("Baseline firejail 0.9.28", 2015-08-08).
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With the previous commit ("makefiles: stop failing when config.mk does
not exist", 2022-06-23), make will not immediately fail when trying to
build a target without having the proper compile-time flags (which are
defined on common.mk).
For example, when running the command below:
make distclean && make
It will throw an error only after (mis-)compiling multiple objects.
So add a dependency on config.mk on every target that uses output
variables (such as @NAME@ / $(NAME)) on its recipe. And add a
dependency on config.sh on targets that call shell scripts that use
output variables (such as @NAME@ / $NAME). Also, add a recipe for
config.mk / config.sh telling to run ./configure, to make it a bit more
obvious just in case.
With this commit, make will abort earlier, by detecting that the
config.mk / config.sh dependency does not exist. This happens before
trying to execute the recipe.
This also makes the dependencies more accurate, since if config.mk
(which defines some CFLAGS) is changed, the CFLAGS may also have
changed, so a target that uses CFLAGS should probably be considered out
of date in this case anyway.
Relates to #5140.
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This allows running `make clean` and `make distclean` (and possibly
others) without having to run ./configure beforehand.
Note that some packaging-related targets still depend on the existence
of generated files. For example:
* dist: config.mk
* deb: config.sh
Commands used to search and replace:
$ git grep -Elz 'include *([^ ]*/)?config.mk' | xargs -0 -I '{}' \
sh -c "printf '%s\n' \
\"\$(sed -E 's|^include *(([^ ]*/)?config.mk)|-include \1|' '{}')\" >'{}'"
Relates to #5140.
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Configure summary: autoconf essentially only parses configure.ac and
generates the configure script (that is, the "./configure" shell
script). The latter is what actually checks what is available on the
system and internally sets the value of the output variables. It then,
for every filename foo in AC_CONFIG_FILES (and for every output variable
name BAR in AC_SUBST), reads foo.in, replaces every occurrence of
`@BAR@` with the value of the shell variable `$BAR` and generates the
file foo from the result. After this, configure is finished and `make`
could be executed to start the build.
Now that (as of #5140) all output variables are only defined on
config.mk.in and on config.sh.in, there is no need to generate any
makefile nor any other mkfile or shell script at configure time. So
rename every "Makefile.in" to "Makefile", mkdeb.sh.in to mkdeb.sh,
src/common.mk.in to src/common.mk and leave just config.mk and config.sh
as the files to be generated at configure time.
This allows editing and committing all makefiles directly, without
potentially having to run ./configure in between.
Commands used to rename the makefiles:
$ git ls-files -z -- '*Makefile.in' | xargs -0 -I '{}' sh -c \
"git mv '{}' \"\$(dirname '{}')/Makefile\""
Additionally, from my (rudimentary) testing, this commit reduces the
time it takes to run ./configure by about 20~25% compared to commit
72ece92ea ("Transmission fixes: drop private-lib (#5213)", 2022-06-22).
Environment: dash 0.5.11.5-1, gcc 12.1.0-2, Artix Linux, ext4 on an HDD.
Commands used for benchmarking each commit:
$ : >time_configure && ./configure && make distclean &&
for i in $(seq 1 10); do
{ time -p ./configure; } 2>>time_configure; done
$ grep real time_configure |
awk '{ total += $2 } END { print total/NR }'
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Currently, the configure-time variables (that is, the ones that assign
to placeholders, such as "@HAVE_MAN@", which are set/replaced at
configure-time) are defined on multiple files (such as on Makefile.in
and on common.mk.in).
To avoid duplication, centralize these variables on a single file
(config.mk.in) and replace all of the other definitions of them with an
include of config.mk.
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When using the "wildcard" internal functions.
This usage has been present since the first "real" commit in the
repository: commit 137985136 ("Baseline firejail 0.9.28").
> H_FILE_LIST = $(sort $(wildcard *.[h]))
> C_FILE_LIST = $(sort $(wildcard *.c))
There is only a single character (i.e.: "h") inside the character class,
so its usage should make no functional difference. It may stem from a
construct that could have originally looked something like this:
C_FILE_LIST = $(sort $(wildcard *.[ch]))
Which would match both the implementation files and the headers.
From Section 4.4, [Using Wildcard Characters in File Names][1] of the
GNU make manual:
> A single file name can specify many files using wildcard characters.
> The wildcard characters in make are ‘*’, ‘?’ and ‘[…]’, the same as in
> the Bourne shell. For example, *.c specifies a list of all the files
> (in the working directory) whose names end in ‘.c’.
See also Section 2.13, [Pattern Matching Notation][2] of POSIX.1-2017.
Commands used to search, replace and clean up:
$ find . -name .git -prune -o -type f \
\( -name Makefile -o -name Makefile.in \
-o -name '*.mk' -o -name '*.mk.in' \) -print0 |
xargs -0 grep -Fl '$(wildcard *.[h])' | tr '\n' '\000' |
xargs -0 sed -i.bak -e \
's/\$(wildcard \*.\[h\])/$(wildcard *.h)/'
$ find . -name .git -prune -o -type f \
-name '*.bak' -exec rm '{}' +
Note: To make sure that this doesn't actually change anything
functionally, I built firejail-git (AUR) on Artix from master and from
this commit and diffing the resulting files produced no output (other
than showing changes related to the build timestamps).
Misc: Reference to the previous makefile-related changes: commit
2465f9248 ("makefiles: make all, clean and distclean PHONY") /
https://github.com/netblue30/firejail/pull/4024
[1]: https://www.gnu.org/software/make/manual/html_node/Wildcards.html
[2]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
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Avoid a stat() call for each affected target and also potentially speed
up parallel builds.
From the GNU make manual[1]:
> Phony targets are also useful in conjunction with recursive
> invocations of make (see Recursive Use of make). In this situation
> the makefile will often contain a variable which lists a number of
> sub-directories to be built.
[...]
> The implicit rule search (see Implicit Rules) is skipped for .PHONY
> targets. This is why declaring a target as .PHONY is good for
> performance, even if you are not worried about the actual file
> existing.
Commands used to search, replace and cleanup:
$ find -type f -name '*Makefile.in' -exec sed -i.bak \
-e 's/^all:/.PHONY: all\nall:/' \
-e 's/^clean:/.PHONY: clean\nclean:/' \
-e 's/^distclean:/.PHONY: distclean\ndistclean:/' '{}' +
$ find -type f -name '*Makefile.in.bak' -exec rm '{}' +
[1]: https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
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according to GCC documentation (https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html):
"For predictable results, you must also specify the same set of options
used for compilation (-fpie, -fPIE, or model suboptions) when you
specify this linker option."
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* move copyright statement to 2020
* move copyright statement to 2020
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* Update libpostexecseccomp.c
Remove `if (size != 0)` condition, which is always true as there is a `if (size <= 0)` condition before.
Also note that if the `if (size <= 0)` condition wouldn't be there and `size` would be 0, there would have been an undefined behavior in due to division by zero in `(unsigned short) size / (unsigned short) sizeof(struct sock_filter);`.
Found with LGTM: https://lgtm.com/projects/g/netblue30/firejail/snapshot/961c4ca00425b60a7bc8543460031a8ebf3d8aa6/files/src/libpostexecseccomp/libpostexecseccomp.c#x838c24f710410160:1
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Allow any syscall to be blacklisted with aid of LD_PRELOAD library,
libpostexecseccomp.so.
Closes: #1447
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