Date: Mon, 22 Mar 2021 23:49:53 GMT From: Robert Watson <rwatson@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 599fb1d198ec - main - Tune DTrace 'aframes' for the FBT and profile providers on arm64. In both cases, too few frames were trimmed, leading to exception handling or DTrace internals being exposed in stack traces exposed by D's stack() primitive. Message-ID: <202103222349.12MNnr27042749@gitrepo.freebsd.org>
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The branch main has been updated by rwatson: URL: https://cgit.FreeBSD.org/src/commit/?id=599fb1d198ec6792ba062114d2589ca9f01a3568 commit 599fb1d198ec6792ba062114d2589ca9f01a3568 Author: Robert Watson <rwatson@FreeBSD.org> AuthorDate: 2021-03-21 00:01:54 +0000 Commit: Robert Watson <rwatson@FreeBSD.org> CommitDate: 2021-03-22 23:49:41 +0000 Tune DTrace 'aframes' for the FBT and profile providers on arm64. In both cases, too few frames were trimmed, leading to exception handling or DTrace internals being exposed in stack traces exposed by D's stack() primitive. MFC after: 3 days Reviewed by: emaste, andrew --- sys/cddl/dev/fbt/aarch64/fbt_isa.c | 5 +++-- sys/cddl/dev/profile/profile.c | 3 +-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/sys/cddl/dev/fbt/aarch64/fbt_isa.c b/sys/cddl/dev/fbt/aarch64/fbt_isa.c index 12be95ea2217..f9b99febe8d1 100644 --- a/sys/cddl/dev/fbt/aarch64/fbt_isa.c +++ b/sys/cddl/dev/fbt/aarch64/fbt_isa.c @@ -44,6 +44,7 @@ #define FBT_PATCHVAL (AARCH64_BRK | AARCH64_BRK_IMM16_VAL) #define FBT_ENTRY "entry" #define FBT_RETURN "return" +#define FBT_AFRAMES 4 int fbt_invop(uintptr_t addr, struct trapframe *frame, uintptr_t rval) @@ -154,7 +155,7 @@ fbt_provide_module_function(linker_file_t lf, int symindx, fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO); fbt->fbtp_name = name; fbt->fbtp_id = dtrace_probe_create(fbt_id, modname, - name, FBT_ENTRY, 3, fbt); + name, FBT_ENTRY, FBT_AFRAMES, fbt); fbt->fbtp_patchpoint = instr; fbt->fbtp_ctl = lf; fbt->fbtp_loadcnt = lf->loadcnt; @@ -196,7 +197,7 @@ again: fbt->fbtp_name = name; if (retfbt == NULL) { fbt->fbtp_id = dtrace_probe_create(fbt_id, modname, - name, FBT_RETURN, 3, fbt); + name, FBT_RETURN, FBT_AFRAMES, fbt); } else { retfbt->fbtp_probenext = fbt; fbt->fbtp_id = retfbt->fbtp_id; diff --git a/sys/cddl/dev/profile/profile.c b/sys/cddl/dev/profile/profile.c index 6074354af18d..1e7a84c272cd 100644 --- a/sys/cddl/dev/profile/profile.c +++ b/sys/cddl/dev/profile/profile.c @@ -123,8 +123,7 @@ struct profile_probe_percpu; #endif #ifdef __aarch64__ -/* TODO: verify */ -#define PROF_ARTIFICIAL_FRAMES 10 +#define PROF_ARTIFICIAL_FRAMES 12 #endif #ifdef __riscv
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