diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index dad79ede4e0ae0..89fdac243324bc 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -145,7 +145,7 @@ $(OUTPUT)test-libopencsd.bin:
 
 DWARFLIBS := -ldw
 ifeq ($(findstring -static,${LDFLAGS}),-static)
-DWARFLIBS += -lelf -lebl -lz -llzma -lbz2
+DWARFLIBS += -lelf -lz -llzma -lbz2 -lpthread
 endif
 
 $(OUTPUT)test-dwarf.bin:
diff --git a/tools/perf/Dockerfile b/tools/perf/Dockerfile
new file mode 100644
index 00000000000000..9feb0e9577040f
--- /dev/null
+++ b/tools/perf/Dockerfile
@@ -0,0 +1,39 @@
+FROM ubuntu:xenial-20200619
+
+WORKDIR /code
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    git \
+    curl \
+    autoconf \
+    asciidoc \
+    libssl-dev \
+    zlib1g-dev \
+    libaudit-dev \
+    binutils-dev \
+    libiberty-dev \
+    libcap-dev \
+    libdwarf-dev \
+    liblzma-dev \
+    libnuma-dev \
+    libbabeltrace-ctf-dev \
+    systemtap-sdt-dev \
+    libslang2-dev \
+    libzstd-dev \
+    libbz2-dev \
+    flex \
+    bison \
+    ;
+
+# Installing a new version of elfutils and libunwind
+RUN curl -L ftp://sourceware.org/pub/elfutils/0.179/elfutils-0.179.tar.bz2 -o /tmp/elfutils-0.179.tar.bz2
+RUN cd /tmp && tar -xf elfutils-0.179.tar.bz2
+RUN cd /tmp/elfutils-0.179 && ./configure --disable-debuginfod --prefix=/usr && make && make install
+
+RUN curl -L http://download.savannah.nongnu.org/releases/libunwind/libunwind-1.4.0.tar.gz -o /tmp/libunwind-1.4.0.tar.gz
+RUN cd /tmp && tar -xf libunwind-1.4.0.tar.gz
+RUN cd /tmp/libunwind-1.4.0 && ./configure --prefix=/usr && make install
+
+CMD bash
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index b3e6ed10f40c6f..f3cf5039ec08c1 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -177,7 +177,7 @@ ifdef LIBDW_DIR
 endif
 DWARFLIBS := -ldw
 ifeq ($(findstring -static,${LDFLAGS}),-static)
-  DWARFLIBS += -lelf -lebl -ldl -lz -llzma -lbz2
+  DWARFLIBS += -lelf -ldl -lz -llzma -lbz2 -lpthread
 endif
 FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
 FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) $(DWARFLIBS)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index dcf288a4fb9a9a..99cdf884553618 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -3212,18 +3212,17 @@ static int switch_output_setup(struct record *rec)
 		return 0;
 	}
 
-	if (!strcmp(s->str, "signal")) {
+	// strstr, not strcmp, to allow it to be used with size/time.
+	if (strstr(s->str, "signal")) {
 do_signal:
 		s->signal = true;
 		pr_debug("switch-output with SIGUSR2 signal\n");
-		goto enabled;
 	}
 
 	val = parse_tag_value(s->str, tags_size);
 	if (val != (unsigned long) -1) {
 		s->size = val;
 		pr_debug("switch-output with %s size threshold\n", s->str);
-		goto enabled;
 	}
 
 	val = parse_tag_value(s->str, tags_time);
@@ -3231,6 +3230,9 @@ static int switch_output_setup(struct record *rec)
 		s->time = val;
 		pr_debug("switch-output with %s time threshold (%lu seconds)\n",
 			 s->str, s->time);
+	}
+
+	if (s->size || s->time || s->signal) {
 		goto enabled;
 	}
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b1f57401ff2394..8d2fe1fd31e96d 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -134,6 +134,7 @@ enum perf_output_field {
 	PERF_OUTPUT_CGROUP          = 1ULL << 39,
 	PERF_OUTPUT_RETIRE_LAT      = 1ULL << 40,
 	PERF_OUTPUT_DSOFF           = 1ULL << 41,
+	PERF_OUTPUT_SYMLINE         = 1ULL << 42,
 };
 
 struct perf_script {
@@ -178,6 +179,7 @@ struct output_option {
 	{.str = "dsoff", .field = PERF_OUTPUT_DSOFF},
 	{.str = "addr",  .field = PERF_OUTPUT_ADDR},
 	{.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
+	{.str = "symline", .field = PERF_OUTPUT_SYMLINE},
 	{.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
 	{.str = "period", .field = PERF_OUTPUT_PERIOD},
 	{.str = "iregs", .field = PERF_OUTPUT_IREGS},
@@ -497,6 +499,11 @@ static int evsel__check_attr(struct evsel *evsel, struct perf_session *session)
 		       "selected.\n");
 		return -EINVAL;
 	}
+	if (PRINT_FIELD(SYMLINE) && !PRINT_FIELD(SYM)) {
+		pr_err("Display of line offsets requested but symbol is not"
+		       "selected.\n");
+		return -EINVAL;
+	}
 	if (PRINT_FIELD(DSO) &&
 	    !(evsel->core.attr.sample_type & (PERF_SAMPLE_IP|PERF_SAMPLE_ADDR))) {
 		pr_err("Display of DSO requested but no address to convert.\n");
@@ -582,6 +589,9 @@ static void set_print_ip_opts(struct perf_event_attr *attr)
 	if (PRINT_FIELD(SYMOFFSET))
 		output[type].print_ip_opts |= EVSEL__PRINT_SYMOFFSET;
 
+	if (PRINT_FIELD(SYMLINE))
+		output[type].print_ip_opts |= EVSEL__PRINT_SYMLINE;
+
 	if (PRINT_FIELD(SRCLINE))
 		output[type].print_ip_opts |= EVSEL__PRINT_SRCLINE;
 }
@@ -790,14 +800,12 @@ static int perf_sample__fprintf_start(struct perf_script *script,
 		printed += fprintf(fp, "VCPU:%03d ", sample->vcpu);
 
 	if (PRINT_FIELD(COMM)) {
-		const char *comm = thread ? thread__comm_str(thread) : ":-1";
-
 		if (latency_format)
-			printed += fprintf(fp, "%8.8s ", comm);
+			printed += fprintf(fp, "%8.8s ", thread__exec_comm_str(thread));
 		else if (PRINT_FIELD(IP) && evsel__has_callchain(evsel) && symbol_conf.use_callchain)
-			printed += fprintf(fp, "%s ", comm);
+			printed += fprintf(fp, "%s ", thread__exec_comm_str(thread));
 		else
-			printed += fprintf(fp, "%16s ", comm);
+			printed += fprintf(fp, "%16s ", thread__exec_comm_str(thread));
 	}
 
 	if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
index 8719b3cb564661..464ace5b532033 100644
--- a/tools/perf/util/evsel_fprintf.c
+++ b/tools/perf/util/evsel_fprintf.c
@@ -119,6 +119,7 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
 	int print_dso = print_opts & EVSEL__PRINT_DSO;
 	int print_dsoff = print_opts & EVSEL__PRINT_DSOFF;
 	int print_symoffset = print_opts & EVSEL__PRINT_SYMOFFSET;
+	int print_symline = print_opts & EVSEL__PRINT_SYMLINE;
 	int print_oneline = print_opts & EVSEL__PRINT_ONELINE;
 	int print_srcline = print_opts & EVSEL__PRINT_SRCLINE;
 	int print_unknown_as_addr = print_opts & EVSEL__PRINT_UNKNOWN_AS_ADDR;
@@ -167,7 +168,9 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
 				node_al.addr = addr;
 				node_al.map  = map__get(map);
 
-				if (print_symoffset) {
+				if (print_symline) {
+					printed += symbol__fprintf_symline_offs(sym, &node_al, fp);
+				} else if (print_symoffset) {
 					printed += __symbol__fprintf_symname_offs(sym, &node_al,
 										  print_unknown_as_addr,
 										  true, fp);
diff --git a/tools/perf/util/evsel_fprintf.h b/tools/perf/util/evsel_fprintf.h
index c8a9fac2f2ddc0..9db9c46ff9dff7 100644
--- a/tools/perf/util/evsel_fprintf.h
+++ b/tools/perf/util/evsel_fprintf.h
@@ -27,6 +27,7 @@ int evsel__fprintf(struct evsel *evsel, struct perf_attr_details *details, FILE
 #define EVSEL__PRINT_CALLCHAIN_ARROW	(1<<7)
 #define EVSEL__PRINT_SKIP_IGNORED	(1<<8)
 #define EVSEL__PRINT_DSOFF		(1<<9)
+#define EVSEL__PRINT_SYMLINE		(1<<10)
 
 struct addr_location;
 struct perf_event_attr;
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 1a5b7fa459b232..f43a70e36c471d 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -945,6 +945,11 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
 			 */
 			clear_perf_probe_point(&pev->point);
 			memcpy(&pev->point, &tmp, sizeof(tmp));
+		} else {
+			if (need_dwarf)
+				return -ENOENT;
+			pr_debug("Failed to use debug info. Try to use symbols.\n");
+			return 0;
 		}
 	}
 
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index f171360b0ef4db..a9a379e312e7c8 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -256,11 +256,23 @@ static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr,
 	}
 
 	/* If this is based on frame buffer, set the offset */
-	if (op->atom == DW_OP_fbreg) {
+	if (op->atom == DW_OP_fbreg || op->atom == DW_OP_call_frame_cfa) {
 		if (fb_ops == NULL)
 			return -ENOTSUP;
 		ref = true;
-		offs = op->number;
+		if (op->atom == DW_OP_fbreg) {
+			offs = op->number;
+		} else if (nops == 3) {
+			/*
+			 * In the case of DW_OP_call_frame_cfa, we either have
+			 * an offset of 0 or we have two more expressions that
+			 * add a const
+			 */
+			if ((op + 1)->atom != DW_OP_consts ||
+			    (op + 2)->atom != DW_OP_plus)
+				return -ENOTSUP;
+			offs = (op + 1)->number;
+		}
 		op = &fb_ops[0];
 	}
 
@@ -376,10 +388,11 @@ static int convert_variable_type(Dwarf_Die *vr_die,
 			(*ref_ptr)->user_access = user_access;
 		}
 		if (!die_compare_name(&type, "char") &&
-		    !die_compare_name(&type, "unsigned char")) {
+		    !die_compare_name(&type, "unsigned char") &&
+			!die_compare_name(&type, "uint8")) {
 			pr_warning("Failed to cast into string: "
-				   "%s is not (unsigned) char *.\n",
-				   dwarf_diename(vr_die));
+				   "%s is not (unsigned) char * or uint8 *, it is %s *.\n",
+				   dwarf_diename(vr_die), dwarf_diename(&type));
 			return -EINVAL;
 		}
 		tvar->type = strdup(cast);
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index af87c46b3f89e5..ff0834328fa46c 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -156,6 +156,10 @@ void symbol__elf_init(void);
 int symbol__annotation_init(void);
 
 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
+size_t __symbol__fprintf_sym_offs(const struct symbol *sym,
+				  const struct addr_location *al,
+				  bool unknown_as_addr, bool print_offsets,
+				  bool print_line, FILE *fp);
 size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
 				      const struct addr_location *al,
 				      bool unknown_as_addr,
@@ -171,6 +175,8 @@ bool symbol__restricted_filename(const char *filename,
 				 const char *restricted_filename);
 int symbol__config_symfs(const struct option *opt __maybe_unused,
 			 const char *dir, int unset __maybe_unused);
+size_t symbol__fprintf_symline_offs(const struct symbol *sym,
+				    const struct addr_location *al, FILE *fp);
 
 struct symsrc;
 
diff --git a/tools/perf/util/symbol_fprintf.c b/tools/perf/util/symbol_fprintf.c
index 088f4abf230fe7..e2165c898bd214 100644
--- a/tools/perf/util/symbol_fprintf.c
+++ b/tools/perf/util/symbol_fprintf.c
@@ -6,6 +6,7 @@
 #include "dso.h"
 #include "map.h"
 #include "symbol.h"
+#include "srcline.h"
 
 size_t symbol__fprintf(struct symbol *sym, FILE *fp)
 {
@@ -16,22 +17,40 @@ size_t symbol__fprintf(struct symbol *sym, FILE *fp)
 		       sym->name);
 }
 
-size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
-				      const struct addr_location *al,
-				      bool unknown_as_addr,
-				      bool print_offsets, FILE *fp)
+size_t __symbol__fprintf_sym_offs(const struct symbol *sym,
+				  const struct addr_location *al,
+				  bool unknown_as_addr, bool print_offsets,
+				  bool print_line, FILE *fp)
 {
 	unsigned long offset;
 	size_t length;
 
 	if (sym) {
 		length = fprintf(fp, "%s", sym->name);
-		if (al && print_offsets) {
-			if (al->addr < sym->end)
-				offset = al->addr - sym->start;
-			else
-				offset = al->addr - map__start(al->map) - sym->start;
-			length += fprintf(fp, "+0x%lx", offset);
+		if (al && (print_offsets || print_line)) {
+			if (print_line) {
+				int ret = 0;
+				char *srcline = map__srcline(al->map, al->addr, NULL);
+				if (srcline != SRCLINE_UNKNOWN) {
+					ret = fprintf(fp, "+%s", srcline);
+					if (ret > 0)
+						length += (size_t)ret;
+				}
+				zfree_srcline(&srcline);
+				srcline = map__srcline(al->map, sym->start, NULL);
+				if (srcline != SRCLINE_UNKNOWN) {
+					ret = fprintf(fp, "+%s", srcline);
+					if (ret > 0)
+						length += (size_t)ret;
+				}
+				zfree_srcline(&srcline);
+			} else {
+				if (al->addr < sym->end)
+					offset = al->addr - sym->start;
+				else
+					offset = al->addr - map__start(al->map) - sym->start;
+				length += fprintf(fp, "+0x%lx", offset);
+			}
 		}
 		return length;
 	} else if (al && unknown_as_addr)
@@ -40,6 +59,15 @@ size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
 		return fprintf(fp, "[unknown]");
 }
 
+size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
+				      const struct addr_location *al,
+				      bool unknown_as_addr, bool print_offsets,
+				      FILE *fp)
+{
+	return __symbol__fprintf_sym_offs(sym, al, unknown_as_addr,
+					  print_offsets, false, fp);
+}
+
 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
 				    const struct addr_location *al,
 				    FILE *fp)
@@ -71,3 +99,9 @@ size_t dso__fprintf_symbols_by_name(struct dso *dso,
 	}
 	return ret;
 }
+
+size_t symbol__fprintf_symline_offs(const struct symbol *sym,
+				    const struct addr_location *al, FILE *fp)
+{
+	return __symbol__fprintf_sym_offs(sym, al, false, false, true, fp);
+}
\ No newline at end of file
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index fe5e6991ae4b49..431369fff8290d 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -305,6 +305,27 @@ const char *thread__comm_str(struct thread *thread)
 	return str;
 }
 
+static const char *__thread__exec_comm_str(struct thread *thread)
+{
+	const struct comm *comm = thread__exec_comm(thread);
+
+	if (!comm)
+		return NULL;
+
+	return comm__str(comm);
+}
+
+const char *thread__exec_comm_str(struct thread *thread)
+{
+	const char *str;
+
+	down_read(&thread->comm_lock);
+	str = __thread__exec_comm_str(thread);
+	up_read(&thread->comm_lock);
+
+	return str;
+}
+
 static int __thread__comm_len(struct thread *thread, const char *comm)
 {
 	if (!comm)
@@ -398,7 +419,7 @@ static int thread__clone_maps(struct thread *thread, struct thread *parent, bool
 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp, bool do_maps_clone)
 {
 	if (thread__comm_set(parent)) {
-		const char *comm = thread__comm_str(parent);
+		const char *comm = thread__exec_comm_str(parent);
 		int err;
 		if (!comm)
 			return -ENOMEM;
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index e79225a0ea46b7..3593fcea597f7e 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -102,6 +102,7 @@ int thread__comm_len(struct thread *thread);
 struct comm *thread__comm(struct thread *thread);
 struct comm *thread__exec_comm(struct thread *thread);
 const char *thread__comm_str(struct thread *thread);
+const char *thread__exec_comm_str(struct thread *thread);
 int thread__insert_map(struct thread *thread, struct map *map);
 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp, bool do_maps_clone);
 size_t thread__fprintf(struct thread *thread, FILE *fp);