From b7d48952c375842bd669460fd8384d90cc12286c Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Tue, 4 Oct 2016 14:35:53 +0100 Subject: trace: dynamically allocate trace_dstate in CPUState MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The CPUState struct has a bitmap tracking which VCPU events are currently active. This is indexed based on the event ID values, and sized according the maximum TraceEventVCPUID enum value. When we start dynamically assigning IDs at runtime, we can't statically declare a bitmap without making an assumption about the max event count. This problem can be solved by dynamically allocating the per-CPU dstate bitmap. Reviewed-by: Stefan Hajnoczi Reviewed-by: Lluís Vilanova Signed-off-by: Daniel P. Berrange Message-id: 1475588159-30598-15-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi --- trace/control.c | 5 +++++ trace/control.h | 7 +++++++ 2 files changed, 12 insertions(+) (limited to 'trace') diff --git a/trace/control.c b/trace/control.c index a2313273d8..5f10e2d96e 100644 --- a/trace/control.c +++ b/trace/control.c @@ -290,3 +290,8 @@ char *trace_opt_parse(const char *optarg) return trace_file; } + +uint32_t trace_get_vcpu_event_count(void) +{ + return TRACE_VCPU_EVENT_COUNT; +} diff --git a/trace/control.h b/trace/control.h index 3f30a0c2b7..69635bfb8b 100644 --- a/trace/control.h +++ b/trace/control.h @@ -232,6 +232,13 @@ extern QemuOptsList qemu_trace_opts; */ char *trace_opt_parse(const char *optarg); +/** + * trace_get_vcpu_event_count: + * + * Return the number of known vcpu-specific events + */ +uint32_t trace_get_vcpu_event_count(void); + #include "trace/control-internal.h" -- cgit v1.2.3