diff options
| author | Andres Freund <andres@anarazel.de> | 2020-04-05 18:23:30 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2020-04-05 18:23:30 -0700 |
| commit | fc3f4453a2bc95549682e23600b22e658cb2d6d7 (patch) | |
| tree | 18772ad598c4447815a1ece9594d1d248d2c5f2a /src/backend/utils/init/miscinit.c | |
| parent | f946069e6827e729857b9f2db06bf27a1c0563ee (diff) | |
| download | postgresql-fc3f4453a2bc95549682e23600b22e658cb2d6d7.tar.gz postgresql-fc3f4453a2bc95549682e23600b22e658cb2d6d7.zip | |
Recompute stack base in forked postmaster children.
This is for the benefit of running postgres under the rr
debugger. When using rr signal handlers running while a syscall is
active use an alternative stack. As e.g. bgworkers are started from
within signal handlers, the forked backend then has a different stack
base than postmaster. Previously that subsequently lead to those
processes triggering spurious "stack depth limit exceeded" errors.
Discussion: https://postgr.es/m/20200327182217.ubrrl32lyfhxfwk5@alap3.anarazel.de
Diffstat (limited to 'src/backend/utils/init/miscinit.c')
| -rw-r--r-- | src/backend/utils/init/miscinit.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c index a7b7b12249d..6fe25c023a4 100644 --- a/src/backend/utils/init/miscinit.c +++ b/src/backend/utils/init/miscinit.c @@ -92,6 +92,15 @@ InitPostmasterChild(void) { IsUnderPostmaster = true; /* we are a postmaster subprocess now */ + /* + * Set reference point for stack-depth checking. We re-do that even in the + * !EXEC_BACKEND case, because there are some edge cases where processes + * are started with an alternative stack (e.g. starting bgworkers when + * running postgres using the rr debugger, as bgworkers are launched from + * signal handlers). + */ + set_stack_base(); + InitProcessGlobals(); /* |