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Make EXEC_BACKEND more convenient on Linux and FreeBSD.

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Try to disable ASLR when building in EXEC_BACKEND mode, to avoid random
memory mapping failures while testing.  For developer use only, no
effect on regular builds.

This has been originally applied as of f3e7806 for v15~, but
recently-added buildfarm member gokiburi tests this configuration on
older branches as well, causing it to fail randomly as ASLR would be
enabled.

Suggested-by: Andres Freund <andres@anarazel.de>
Tested-by: Bossart, Nathan <bossartn@amazon.com>
Discussion: https://postgr.es/m/20210806032944.m4tz7j2w47mant26%40alap3.anarazel.de
Backpatch-through: 12
This commit is contained in:
Michael Paquier
2023-02-08 13:09:27 +09:00
parent e4c4e6258c
commit 0801345758
8 changed files with 52 additions and 1 deletions
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3
src/include/pg_config.h.in
View File

@ -619,6 +619,9 @@
/* Define to 1 if you have the <sys/ipc.h> header file. */
#undef HAVE_SYS_IPC_H
/* Define to 1 if you have the <sys/personality.h> header file. */
#undef HAVE_SYS_PERSONALITY_H
/* Define to 1 if you have the <sys/prctl.h> header file. */
#undef HAVE_SYS_PRCTL_H

5
src/include/port.h
View File

@ -138,6 +138,11 @@ extern char *pipe_read_line(char *cmd, char *line, int maxsize);
/* Doesn't belong here, but this is used with find_other_exec(), so... */
#define PG_BACKEND_VERSIONSTR "postgres (PostgreSQL) " PG_VERSION "\n"
#ifdef EXEC_BACKEND
/* Disable ASLR before exec, for developer builds only (in exec.c) */
extern int pg_disable_aslr(void);
#endif
#if defined(WIN32) || defined(__CYGWIN__)
#define EXE ".exe"