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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-01-22 09:58:49 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.com> | 2016-03-07 00:21:37 -0300 |
| commit | 1eb8930608705702d5746e5491bab4e4429fcb83 (patch) | |
| tree | 6cf2a5c4a40c7240cc58c1c4e3347f77b699dd67 /posix/Makefile | |
| parent | f83bb9b8e97656ae0d3e2a31e859363e2d4d5832 (diff) | |
| download | glibc-1eb8930608705702d5746e5491bab4e4429fcb83.tar.gz glibc-1eb8930608705702d5746e5491bab4e4429fcb83.tar.xz glibc-1eb8930608705702d5746e5491bab4e4429fcb83.zip | |
posix: execvpe cleanup
This patch removes all the dynamic allocation on execvpe code and
instead use direct stack allocation. This is QoI approach to make
it possible use in scenarios where memory is shared with parent
(vfork or clone with CLONE_VM).
For default process spawn (script file without a shebang), stack
allocation is bounded by NAME_MAX plus PATH_MAX plus 1. Large
file arguments returns an error (ENAMETOOLONG). This differs than
current GLIBC pratice in general, but it used to limit stack
allocation for large inputs. Also, path in PATH environment variable
larger than PATH_MAX are ignored.
The shell direct execution exeception, where execve returns ENOEXEC,
might requires a large stack allocation due large input argument list.
Tested on i686, x86_64, powerpc64le, and aarch64.
* posix/execvpe.c (__execvpe): Remove dynamic allocation.
* posix/Makefile (tests): Add tst-execvpe{1,2,3,4,5,6}.
* posix/tst-execvp1.c (do_test): Use a macro to call execvp.
* posix/tst-execvp2.c (do_test): Likewise.
* posix/tst-execvp3.c (do_test): Likewise.
* posix/tst-execvp4.c (do_test): Likewise.
* posix/tst-execvpe1.c: New file.
* posix/tst-execvpe2.c: Likewise.
* posix/tst-execvpe3.c: Likewise.
* posix/tst-execvpe4.c: Likewise.
* posix/tst-execvpe5.c: Likewise.
* posix/tst-execvpe6.c: Likewise.
Diffstat (limited to 'posix/Makefile')
| -rw-r--r-- | posix/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/posix/Makefile b/posix/Makefile index 4e90a9540a..7ec110e80c 100644 --- a/posix/Makefile +++ b/posix/Makefile @@ -82,6 +82,8 @@ tests := tstgetopt testfnm runtests runptests \ tst-execv1 tst-execv2 tst-execl1 tst-execl2 \ tst-execve1 tst-execve2 tst-execle1 tst-execle2 \ tst-execvp3 tst-execvp4 tst-rfc3484 tst-rfc3484-2 \ + tst-execvpe1 tst-execvpe2 tst-execvpe3 tst-execvpe4 \ + tst-execvpe5 tst-execvpe6 \ tst-rfc3484-3 \ tst-getaddrinfo3 tst-fnmatch2 tst-cpucount tst-cpuset \ bug-getopt1 bug-getopt2 bug-getopt3 bug-getopt4 \ @@ -229,6 +231,7 @@ tstgetopt-ARGS = -a -b -cfoobar --required foobar --optional=bazbug \ tst-exec-ARGS = -- $(host-test-program-cmd) tst-exec-static-ARGS = $(tst-exec-ARGS) +tst-execvpe5-ARGS = -- $(host-test-program-cmd) tst-spawn-ARGS = -- $(host-test-program-cmd) tst-spawn-static-ARGS = $(tst-spawn-ARGS) tst-dir-ARGS = `pwd` `cd $(common-objdir)/$(subdir); pwd` `cd $(common-objdir); pwd` $(objpfx)tst-dir |