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misc/pprof: pprof on windows does not provide demangled names
Fixes #6034. R=golang-dev, bradfitz, alex.brainman, dan.kortschak CC=golang-dev https://golang.org/cl/12311044
This commit is contained in:
Shivakumar GN
Alex Brainman
parent
b7eb0e5990
commit
88d544e01d
47
misc/pprof
47
misc/pprof
@ -78,6 +78,7 @@
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use strict;
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use warnings;
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use Getopt::Long;
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use File::Temp;
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my $PPROF_VERSION = "1.5";
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@ -134,6 +135,13 @@ my @prefix_list = ();
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my $sep_symbol = '_fini';
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my $sep_address = undef;
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my $OS = $^O;
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my $DEVNULL = "/dev/null";
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if ($^O =~ /MSWin32|cygwin|msys/) {
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$OS = "windows";
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$DEVNULL = "NUL";
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}
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##### Argument parsing #####
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sub usage_string {
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@ -286,8 +294,9 @@ sub Init() {
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# Setup tmp-file name and handler to clean it up.
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# We do this in the very beginning so that we can use
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# error() and cleanup() function anytime here after.
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$main::tmpfile_sym = "/tmp/pprof$$.sym";
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$main::tmpfile_ps = "/tmp/pprof$$";
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$main::tmpfile_sym = File::Temp->new()->filename;
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$main::tmpfile_ps = File::Temp->new()->filename;
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$main::next_tmpfile = 0;
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$SIG{'INT'} = \&sighandler;
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@ -696,7 +705,7 @@ sub ReadlineMightFail {
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sub RunGV {
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my $fname = shift;
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my $bg = shift; # "" or " &" if we should run in background
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if (!system("$GV --version >/dev/null 2>&1")) {
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if (!system("$GV --version >$DEVNULL 2>&1")) {
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# Options using double dash are supported by this gv version.
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# Also, turn on noantialias to better handle bug in gv for
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# postscript files with large dimensions.
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@ -1246,7 +1255,7 @@ sub Disassemble {
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"--start-address=0x$start_addr " .
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"--stop-address=0x$end_addr $prog");
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if (system("$objdump --help >/dev/null 2>&1") != 0) {
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if (system("$objdump --help >$DEVNULL 2>&1") != 0) {
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# objdump must not exist. Fall back to go tool objdump.
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$objdump = "go tool objdump";
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$cmd = "$objdump $prog 0x$start_addr 0x$end_addr";
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@ -4426,7 +4435,7 @@ sub MapToSymbols {
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# If "addr2line" isn't installed on the system at all, just use
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# nm to get what info we can (function names, but not line numbers).
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if (system("$addr2line --help >/dev/null 2>&1") != 0) {
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if (system("$addr2line --help >$DEVNULL 2>&1") != 0) {
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MapSymbolsWithNM($image, $offset, $pclist, $symbols);
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return;
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}
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@ -4444,7 +4453,7 @@ sub MapToSymbols {
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if (defined($sep_address)) {
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# Only add " -i" to addr2line if the binary supports it.
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# addr2line --help returns 0, but not if it sees an unknown flag first.
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if (system("$cmd -i --help >/dev/null 2>&1") == 0) {
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if (system("$cmd -i --help >$DEVNULL 2>&1") == 0) {
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$cmd .= " -i";
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} else {
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$sep_address = undef; # no need for sep_address if we don't support -i
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@ -4599,7 +4608,12 @@ sub ConfigureObjTools {
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(-e $prog_file) || error("$prog_file does not exist.\n");
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# Follow symlinks (at least for systems where "file" supports that)
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my $file_type = `/usr/bin/file -L $prog_file 2>/dev/null || /usr/bin/file $prog_file`;
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my $file_cmd = "/usr/bin/file -L $prog_file 2>$DEVNULL || /usr/bin/file $prog_file 2>$DEVNULL";
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if ($^O eq "MSWin32") {
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$file_cmd = "file -L $prog_file 2>NUL || file $prog_file 2>NUL";
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}
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my $file_type = `$file_cmd`;
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if ($file_type =~ /64-bit/) {
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# Change $address_length to 16 if the program file is ELF 64-bit.
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# We can't detect this from many (most?) heap or lock contention
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@ -4608,14 +4622,13 @@ sub ConfigureObjTools {
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$address_length = 16;
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}
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if ($file_type =~ /MS Windows/) {
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if (($file_type =~ /MS Windows/) || ($OS eq "windows")) {
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# For windows, we provide a version of nm and addr2line as part of
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# the opensource release, which is capable of parsing
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# Windows-style PDB executables. It should live in the path, or
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# in the same directory as pprof.
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$obj_tool_map{"nm_pdb"} = "nm-pdb";
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$obj_tool_map{"addr2line_pdb"} = "addr2line-pdb";
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$obj_tool_map{"is_windows"} = "true";
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}
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if ($file_type =~ /Mach-O/) {
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@ -4801,29 +4814,23 @@ sub GetProcedureBoundaries {
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# in an incompatible way. So first we test whether our nm supports
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# --demangle and -f.
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my $demangle_flag = "";
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if (system("$nm --demangle $image >/dev/null 2>&1") == 0) {
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if (system("$nm --demangle $image >$DEVNULL 2>&1") == 0) {
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# In this mode, we do "nm --demangle <foo>"
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$demangle_flag = "--demangle";
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}
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my $flatten_flag = "";
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if (system("$nm -f $image >/dev/null 2>&1") == 0) {
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if (system("$nm -f $image >$DEVNULL 2>&1") == 0) {
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$flatten_flag = "-f";
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}
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# Finally, in the case $image isn't a debug library, we try again with
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# -D to at least get *exported* symbols. If we can't use --demangle, too bad.
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my @nm_commands = ("$nm -n $flatten_flag $demangle_flag" .
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" $image 2>/dev/null",
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" $image 2>$DEVNULL",
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"$nm -D -n $flatten_flag $demangle_flag" .
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" $image 2>/dev/null",
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" $image 2>$DEVNULL",
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# go tool nm is for Go binaries
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"go tool nm $image 2>/dev/null | sort");
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# If the executable is an MS Windows Go executable, we'll
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# have set up obj_tool_map("is_windows").
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if (exists $obj_tool_map{"is_windows"}) {
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@nm_commands = ("go tool nm $image 2>/dev/null | sort");
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}
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"go tool nm $image 2>$DEVNULL | sort");
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foreach my $nm_command (@nm_commands) {
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my $symbol_table = GetProcedureBoundariesViaNm($nm_command, $regexp);
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