/*
 * perf_hooks.c
 *
 * Copyright (C) 2016 Wang Nan <wangnan0@huawei.com>
 * Copyright (C) 2016 Huawei Inc.
 */

#include <errno.h>
#include <stdlib.h>
#include <setjmp.h>
#include <linux/err.h>
#include "util/util.h"
#include "util/debug.h"
#include "util/perf-hooks.h"

static sigjmp_buf jmpbuf;
static const struct perf_hook_desc *current_perf_hook;

void perf_hooks__invoke(const struct perf_hook_desc *desc)
{
	if (!(desc && desc->p_hook_func && *desc->p_hook_func))
		return;

	if (sigsetjmp(jmpbuf, 1)) {
		pr_warning("Fatal error (SEGFAULT) in perf hook '%s'\n",
			   desc->hook_name);
		*(current_perf_hook->p_hook_func) = NULL;
	} else {
		current_perf_hook = desc;
		(**desc->p_hook_func)(desc->hook_ctx);
	}
	current_perf_hook = NULL;
}

void perf_hooks__recover(void)
{
	if (current_perf_hook)
		siglongjmp(jmpbuf, 1);
}

#define PERF_HOOK(name)					\
perf_hook_func_t __perf_hook_func_##name = NULL;	\
struct perf_hook_desc __perf_hook_desc_##name =		\
	{.hook_name = #name,				\
	 .p_hook_func = &__perf_hook_func_##name,	\
	 .hook_ctx = NULL};
#include "perf-hooks-list.h"
#undef PERF_HOOK

#define PERF_HOOK(name)		\
	&__perf_hook_desc_##name,

static struct perf_hook_desc *perf_hooks[] = {
#include "perf-hooks-list.h"
};
#undef PERF_HOOK

int perf_hooks__set_hook(const char *hook_name,
			 perf_hook_func_t hook_func,
			 void *hook_ctx)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(perf_hooks); i++) {
		if (strcmp(hook_name, perf_hooks[i]->hook_name) != 0)
			continue;

		if (*(perf_hooks[i]->p_hook_func))
			pr_warning("Overwrite existing hook: %s\n", hook_name);
		*(perf_hooks[i]->p_hook_func) = hook_func;
		perf_hooks[i]->hook_ctx = hook_ctx;
		return 0;
	}
	return -ENOENT;
}

perf_hook_func_t perf_hooks__get_hook(const char *hook_name)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(perf_hooks); i++) {
		if (strcmp(hook_name, perf_hooks[i]->hook_name) != 0)
			continue;

		return *(perf_hooks[i]->p_hook_func);
	}
	return ERR_PTR(-ENOENT);
}
527960b07ad2bb'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/mips'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>mips</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Olof Johansson &lt;olof@lixom.net&gt;</td><td class='right'>2017-01-29 21:00:48 -0800</td></tr>
<tr><th>committer</th><td>Olof Johansson &lt;olof@lixom.net&gt;</td><td class='right'>2017-01-29 21:00:48 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>0a019a28e0ca0af7dc2691d1a9527960b07ad2bb</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>5ee1db9aacacd6af6701fb290e8a294ef3cc2bf2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>sound/mips</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/mips?id=ec026b5020688a8bde5fae9a69ae3c59b66ba3ae'>ec026b5020688a8bde5fae9a69ae3c59b66ba3ae</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb&amp;id2=ec026b5020688a8bde5fae9a69ae3c59b66ba3ae'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/mips?id=8413299cb3933dade6186bbee8363f190032107e'>8413299cb3933dade6186bbee8363f190032107e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/mips?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb&amp;id2=8413299cb3933dade6186bbee8363f190032107e'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'sti-dt-for-v4.10-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti into fixes</div><div class='commit-msg'>STi DT fix:

Since v4.10-rc1, xhci is complaining in loop with :
    [  801.953836] usb usb6-port1: Cannot enable. Maybe the USB cable is bad?
    [  801.960455] xhci-hcd xhci-hcd.0.auto: Cannot set link state.
    [  801.966611] usb usb6-port1: cannot disable (err = -32)

set property "snps,dis_u3_susphy_quirk" in DT fix it.

* tag 'sti-dt-for-v4.10-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/pchotard/sti:
  ARM: dts: STiH407-family: set snps,dis_u3_susphy_quirk

Signed-off-by: Olof Johansson &lt;olof@lixom.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0a019a28e0ca0af7dc2691d1a9527960b07ad2bb'>Diffstat</a> (limited to 'sound/mips')</div><table summary='diffstat' class='diffstat'>