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Add a kernel option for amd64 to compile with the frame on the stack

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so that the DTrace Function Bounadry Trace (fbt) provider can get
coverage of most functions in the kernel.
This commit is contained in:
John Birrell 2008-05-23 03:52:55 +00:00
parent 75d94ef6ca
commit 91d0f31d5f
2 changed files with 3 additions and 1 deletions
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3
sys/conf/Makefile.amd64
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@ -32,8 +32,9 @@ S= ../../..
.include "$S/conf/kern.pre.mk"
DDB_ENABLED!= grep DDB opt_ddb.h || true
DTR_ENABLED!= grep KDTRACE_FRAME opt_kdtrace.h || true
HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true
.if !empty(DDB_ENABLED) || !empty(HWPMC_ENABLED)
.if !empty(DDB_ENABLED) || !empty(DTR_ENABLED) || !empty(HWPMC_ENABLED)
CFLAGS+= -fno-omit-frame-pointer
.endif

1
sys/conf/options.amd64
View File

@ -63,6 +63,7 @@ DEV_ATPIC opt_atpic.h
# Debugging
STOP_NMI opt_cpu.h
KDTRACE_FRAME opt_kdtrace.h
# BPF just-in-time compiler
BPF_JITTER opt_bpf.h