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author | Rich Felker <dalias@aerifal.cx> | 2018-09-10 16:13:29 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2018-09-12 14:34:32 -0400 |
commit | fe61a7aa53e68e8a17b5eb8d502e6fa314139ced (patch) | |
tree | 76624120cdf978e0d5c3a995d27e09eeba1a1151 /include/complex.h | |
parent | 039f1b3c564667ab6fc9955bd892c2e527eb80b0 (diff) | |
download | musl-fe61a7aa53e68e8a17b5eb8d502e6fa314139ced.tar.gz |
rework mechanism for posix_spawnp calling posix_spawn
previously, a common __posix_spawnx backend was used that accepted an
additional argument for the execve variant to call in the child. this
moderately bloated up the posix_spawn function, shuffling arguments
between stack and/or registers to call a 7-argument function from a
6-argument one.
instead, tuck the exec function pointer in an unused part of the
(large) pthread_spawnattr_t structure, and have posix_spawnp duplicate
the attributes and fill in a pointer to __execvpe. the net code size
change is minimal, but the weight is shifted to the "heavier" function
which already pulls in more dependencies.
as a bonus, we get rid of an external symbol (__posix_spawnx) that had
no really good place for a declaration because it shouldn't have
existed to begin with.
Diffstat (limited to 'include/complex.h')
0 files changed, 0 insertions, 0 deletions