RepoMirrors
/
musl
mirror of git://git.musl-libc.org/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

document pthread structure ABI constraints in comments 

in the original submission of the patch that became commit
7c709f2d4f, and in subsequent reading of
it by others, it was not clear that the new member had to be inserted
before canary_at_end, or that inserting it at that location was safe.
add comments to document.
This commit is contained in:
Rich Felker 2018-02-05 11:45:52 -05:00
parent e53296f889
commit cc7c300d1a
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/internal/pthread_impl.h
View File

@ -13,11 +13,15 @@
#define pthread __pthread
struct pthread {
/* Part 1 -- these fields may be external or
* internal (accessed via asm) ABI. Do not change. */
struct pthread *self;
void **dtv, *unused1, *unused2;
uintptr_t sysinfo;
uintptr_t canary, canary2;
pid_t tid, pid;
/* Part 2 -- implementation details, non-ABI. */
int tsd_used, errno_val;
volatile int cancel, canceldisable, cancelasync;
int detached;
@ -47,6 +51,9 @@ struct pthread {
int dlerror_flag;
void *stdio_locks;
size_t guard_size;
/* Part 3 -- the positions of these fields relative to
* the end of the structure is external and internal ABI. */
uintptr_t canary_at_end;
void **dtv_copy;
};