1 files changed, 145 insertions, 0 deletions
diff --git a/lib/libpmcstat/libpmcstat_symbol.c b/lib/libpmcstat/libpmcstat_symbol.c
new file mode 100644
index 000000000000..b77124287a74
--- /dev/null
+++ b/lib/libpmcstat/libpmcstat_symbol.c
@@ -0,0 +1,145 @@
+/*-
+ * Copyright (c) 2003-2008 Joseph Koshy
+ * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by BAE Systems, the University of Cambridge
+ * Computer Laboratory, and Memorial University under DARPA/AFRL contract
+ * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
+ * (TC) research program.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/cpuset.h>
+#include <sys/event.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/module.h>
+#include <sys/pmc.h>
+
+#include <assert.h>
+#include <err.h>
+#include <pmc.h>
+#include <pmclog.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libpmcstat.h"
+
+struct pmcstat_symbol *
+pmcstat_symbol_search_by_name(struct pmcstat_process *pp,
+    const char *pi_name, const char *name, uintptr_t *addr_start,
+    uintptr_t *addr_end)
+{
+	struct pmcstat_symbol *sym;
+	struct pmcstat_image *image;
+	struct pmcstat_pcmap *pcm;
+	const char *name1;
+	const char *name2;
+	bool found;
+	size_t i;
+
+	found = 0;
+
+	if (pp == NULL)
+		return (NULL);
+
+	TAILQ_FOREACH(pcm, &pp->pp_map, ppm_next) {
+		image = pcm->ppm_image;
+		if (image->pi_name == NULL)
+			continue;
+		name1 = pmcstat_string_unintern(image->pi_name);
+		if (strcmp(name1, pi_name) == 0) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (!found || image->pi_symbols == NULL)
+		return (NULL);
+
+	found = 0;
+
+	for (i = 0; i < image->pi_symcount; i++) {
+		sym = &image->pi_symbols[i];
+		name2 = pmcstat_string_unintern(sym->ps_name);
+		if (strcmp(name2, name) == 0) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (!found)
+		return (NULL);
+
+	*addr_start = (image->pi_vaddr - image->pi_start +
+	    pcm->ppm_lowpc + sym->ps_start);
+	*addr_end = (image->pi_vaddr - image->pi_start +
+	    pcm->ppm_lowpc + sym->ps_end);
+
+	return (sym);
+}
+
+/*
+ * Helper function.
+ */
+
+int
+pmcstat_symbol_compare(const void *a, const void *b)
+{
+	const struct pmcstat_symbol *sym1, *sym2;
+
+	sym1 = (const struct pmcstat_symbol *) a;
+	sym2 = (const struct pmcstat_symbol *) b;
+
+	if (sym1->ps_end <= sym2->ps_start)
+		return (-1);
+	if (sym1->ps_start >= sym2->ps_end)
+		return (1);
+	return (0);
+}
+
+/*
+ * Map an address to a symbol in an image.
+ */
+
+struct pmcstat_symbol *
+pmcstat_symbol_search(struct pmcstat_image *image, uintfptr_t addr)
+{
+	struct pmcstat_symbol sym;
+
+	if (image->pi_symbols == NULL)
+		return (NULL);
+
+	sym.ps_name  = NULL;
+	sym.ps_start = addr;
+	sym.ps_end   = addr + 1;
+
+	return (bsearch((void *) &sym, image->pi_symbols,
+	    image->pi_symcount, sizeof(struct pmcstat_symbol),
+	    pmcstat_symbol_compare));
+}