From f98be1582d58a06dfc162f58ba2c99f08adc3fa7 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Thu, 31 Aug 2017 17:42:15 -0700
Subject: [PATCH] ircd::ctx: Expose stack usage functions to user.

---
 include/ircd/ctx/prof.h |  6 ++++++
 ircd/ctx.cc             | 10 ++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/ircd/ctx/prof.h b/include/ircd/ctx/prof.h
index 9a36fbf9d..5bb642f9a 100644
--- a/include/ircd/ctx/prof.h
+++ b/include/ircd/ctx/prof.h
@@ -24,6 +24,12 @@
 #pragma once
 #define HAVE_IRCD_CTX_PROF_H
 
+namespace ircd::ctx
+{
+    size_t stack_usage_here(const ctx &) __attribute__((noinline));
+    size_t stack_usage_here() __attribute__((noinline));
+}
+
 /* Profiling for the context system. These facilities provide tools and statistics.
  * The primary purpose here is to alert developers of unwanted context behavior, in
  * addition to optimizing the overall performance of the context system.
diff --git a/ircd/ctx.cc b/ircd/ctx.cc
index 7488361f7..9fefe994c 100644
--- a/ircd/ctx.cc
+++ b/ircd/ctx.cc
@@ -617,7 +617,6 @@ namespace ircd::ctx::prof
 {
 	time_point cur_slice_start;     // Time slice state
 
-	size_t stack_usage_here(const ctx &) __attribute__((noinline));
 	void check_stack();
 	void check_slice();
 	void slice_start();
@@ -726,7 +725,14 @@ ircd::ctx::prof::check_stack()
 }
 
 size_t
-ircd::ctx::prof::stack_usage_here(const ctx &ctx)
+ircd::ctx::stack_usage_here()
+{
+	assert(current);
+	return stack_usage_here(*current);
+}
+
+size_t
+ircd::ctx::stack_usage_here(const ctx &ctx)
 {
 	return ctx.stack_base - uintptr_t(__builtin_frame_address(0));
 }