From ef4c9fc8542e06b1d567172c04b0c0377c7ab0c5 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Tue, 4 Oct 2016 14:35:49 +0100 Subject: trace: remove the TraceEventID and TraceEventVCPUID enums MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The TraceEventID and TraceEventVCPUID enums constants are no longer actually used for anything critical. The TRACE_EVENT_COUNT limit is used to determine the size of the TraceEvents array, and can be removed if we just NULL terminate the array instead. The TRACE_VCPU_EVENT_COUNT limit is used as a magic value for marking non-vCPU events, and also for declaring the size of the trace dstate mask in the CPUState struct. The former usage can be replaced by a dedicated constant TRACE_EVENT_VCPU_NONE, defined as (uint32_t)-1. For the latter usage, we can simply define a constant for the number of VCPUs, avoiding the need for the full enum. The only other usages of the enum values can be replaced by accesing the id/vcpu_id fields via the named TraceEvent structs. Reviewed-by: Lluís Vilanova Reviewed-by: Stefan Hajnoczi Signed-off-by: Daniel P. Berrange Message-id: 1475588159-30598-11-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi --- trace/simple.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'trace/simple.c') diff --git a/trace/simple.c b/trace/simple.c index 2f09dafcbc..2ec32e159c 100644 --- a/trace/simple.c +++ b/trace/simple.c @@ -17,8 +17,8 @@ #include "trace/control.h" #include "trace/simple.h" -/** Trace file header event ID */ -#define HEADER_EVENT_ID (~(uint64_t)0) /* avoids conflicting with TraceEventIDs */ +/** Trace file header event ID, picked to avoid conflict with real event IDs */ +#define HEADER_EVENT_ID (~(uint64_t)0) /** Trace file magic number */ #define HEADER_MAGIC 0xf2b177cb0aa429b4ULL @@ -58,7 +58,7 @@ static char *trace_file_name; /* * Trace buffer entry */ typedef struct { - uint64_t event; /* TraceEventID */ + uint64_t event; /* event ID value */ uint64_t timestamp_ns; uint32_t length; /* in bytes */ uint32_t pid; @@ -202,7 +202,7 @@ void trace_record_write_str(TraceBufferRecord *rec, const char *s, uint32_t slen rec->rec_off = write_to_buffer(rec->rec_off, (void*)s, slen); } -int trace_record_start(TraceBufferRecord *rec, TraceEventID event, size_t datasize) +int trace_record_start(TraceBufferRecord *rec, uint32_t event, size_t datasize) { unsigned int idx, rec_off, old_idx, new_idx; uint32_t rec_len = sizeof(TraceRecord) + datasize; -- cgit v1.2.1