Date: Mon, 18 Jan 2021 17:32:38 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 7f1032dff07a - stable/12 - libdtrace: Format USDT symbols correctly based on symbol binding Message-ID: <202101181732.10IHWcih085294@gitrepo.freebsd.org>
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The branch stable/12 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=7f1032dff07a411bb2296ac2e13ac7e1752d25e1 commit 7f1032dff07a411bb2296ac2e13ac7e1752d25e1 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-01-10 22:46:32 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2021-01-18 17:00:40 +0000 libdtrace: Format USDT symbols correctly based on symbol binding Before we did not handle weak symbols correctly, sometimes resulting in link errors from dtrace -G when processing object files where functions with weak aliases contain USDT probes. Reported by: rlibby Sponsored by: The FreeBSD Foundation (cherry picked from commit d00431a7bd0c4b4607943baed588e58ad5ae6150) --- cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c index d8448283b168..589b30aa8654 100644 --- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c +++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c @@ -1337,18 +1337,24 @@ process_obj(dtrace_hdl_t *dtp, const char *obj, int *eprobesp) /* * Aliases of weak symbols don't get a uniquifier. */ - if (GELF_ST_BIND(fsym.st_info) == STB_WEAK) + if (GELF_ST_BIND(fsym.st_info) == STB_WEAK) { len = snprintf(NULL, 0, dt_weaksymfmt, dt_symprefix, s) + 1; - else + } else { len = snprintf(NULL, 0, dt_symfmt, dt_symprefix, objkey, s) + 1; + } if ((p = dt_alloc(dtp, len)) == NULL) { dt_strtab_destroy(strtab); goto err; } - (void) snprintf(p, len, dt_symfmt, dt_symprefix, - objkey, s); + if (GELF_ST_BIND(fsym.st_info) == STB_WEAK) { + (void) snprintf(p, len, dt_weaksymfmt, + dt_symprefix, s); + } else { + (void) snprintf(p, len, dt_symfmt, dt_symprefix, + objkey, s); + } if (dt_strtab_index(strtab, p) == -1) { /*
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