Repository navigation
Expand file tree
/
Copy pathlinux.js
More file actions
210 lines (185 loc) · 6.56 KB
/
Copy pathlinux.js
File metadata and controls
210 lines (185 loc) · 6.56 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
'use strict';
const child_process = require('child_process');
const fs = require('fs');
const path = require('path');
const lldb = require('./lldb');
/**
* Find the 'best' lldb to use, exit the process with 1 if failed.
* The search happens in the following order:
* - the one specified by the user using npm --lldb_exe=... install llnode
* - the default lldb executable (`lldb`)
* - the higest known lldb version (`lldb-x.y`)
* - the names of future releases are predictable for linux
*
* @returns {string} Path to the lldb executable
*/
function getLldbExecutable() {
if (process.env.npm_config_lldb_exe !== undefined) {
return process.env.npm_config_lldb_exe;
}
// Use `Array.prototype.concat.apply` to support
// runtimes without `Array.prototype.flatMap`.
// Look for LLDB up to version 20.
const versions = Array.prototype.concat.apply([],
Array.from({length: 20}, (_, i) => i + 1).map((major) =>
Array.from({ length: major < 4 ? 10 : 1 }, (_, minor) => major + '.' + minor)
));
const lldbExeNames = ['lldb'].concat(versions.reverse().map((v) => 'lldb-' + v));
return lldb.tryExecutables(lldbExeNames);
}
/**
* Try to find an executable llvm-config in the system. Returns undefined
* it it could not be found.
* @param {string} version lldb version for linux, e.g. '3.9' for lldb-3.9
* @returns {string|undefined}
*/
function getLlvmConfig(version) {
// On Ubuntu llvm-config is suffixed
let llvmConfig = lldb.tryExecutables([`llvm-config-${version}`]);
if (!llvmConfig) {
llvmConfig = lldb.tryExecutables(['llvm-config']);
}
if (llvmConfig) {
try {
child_process.execFileSync(llvmConfig, ['--version']);
} catch (err) {
return undefined; // Not really executable
}
}
return llvmConfig;
}
/**
* Get the directory containing the lldb headers. If it returns undefined,
* we need to download the headers to ./lldb/include/lldb.
* Using the installed headers will ensure we have the correct ones.
* @param {string|undefined} llvmConfig Path to llvm-config, if it's installed
* @returns {string|undefined} the lldb include directory, undefined if failed
*/
function getIncludeDir(llvmConfig) {
if (llvmConfig) {
const includeDir = child_process.execFileSync(
llvmConfig, ['--includedir']
).toString().trim();
// Include directory doesn't need include/lldb on the end but the llvm
// headers can be installed without the lldb headers so check for them.
if (includeDir && fs.existsSync(lldb.getApiHeadersPath(includeDir))) {
return includeDir;
}
}
// On RedHat the headers are just installed in /usr/include
if (fs.existsSync(lldb.getApiHeadersPath('/usr/include'))) {
return '/usr/include';
}
// We will download the headers
return undefined;
}
/**
* Get the directory containing the lldb shared libraries. If it returns
* undefined, the shared library will be searched from the global search paths
* @param {string} lldbExe Path to the corresponding lldb executable
* @param {string|undefined} llvmConfig Path to llvm-config, if it's installed
* @returns {{dir:string|undefined, name:string, so: string|undefined}}
*/
function getLib(lldbExe, llvmConfig) {
// First look for the libraries in the directory returned by
// llvm-config --libdir
if (llvmConfig) {
const libDir = child_process.execFileSync(
llvmConfig, ['--libdir']
).toString().trim();
if (fs.existsSync(path.join(libDir, 'liblldb.so'))) {
return { dir: libDir, name: 'lldb', so: undefined };
}
}
// Look for the libraries loaded by the executable using ldd
let libs;
try {
libs = child_process.execFileSync(
'ldd', [lldbExe]
).toString().trim();
} catch (err) {
return { dir: undefined, name: 'lldb', so: undefined };
}
const lib = libs.split(/\s/).find(
line => line.includes('liblldb') && line.startsWith('/'));
if (!lib) {
return { dir: undefined, name: 'lldb', so: undefined };
}
console.log(`From ldd: ${lldbExe} loads ${lib}`);
const libDir = path.dirname(path.resolve(lib));
// On Ubuntu the libraries are suffixed and installed globally
const libName = path.basename(lib).match(/lib(lldb.*?)\.so/)[1];
// On RedHat there might not be a non-versioned liblldb.so
// in the system. It's fine in the case of plugins since the lldb executable
// will load the library before loading the plugin, but we will have to link
// to the versioned library file for addons.
if (fs.existsSync(path.join(libDir, `lib${libName}.so`))) {
return {
dir: libDir,
name: libName,
so: undefined
};
}
return {
dir: undefined,
name: libName,
so: lib
};
}
/**
* Get the lldb installation. If prefix is undefined, the headers need to
* be downloaded.
* The version string will be in the form like '3.9'
*/
function getLldbInstallation() {
console.log('Looking for lldb executable...');
const lldbExe = getLldbExecutable();
if (!lldbExe) {
console.log('Could not find any usable lldb executable');
console.log('Please see the README.md on how to install lldb');
process.exit(1);
}
console.log(`Found lldb executable ${lldbExe}`);
console.log('\nReading lldb version...');
const lldbVersion = lldb.getLldbVersion(lldbExe);
if (!lldbVersion) {
console.log(`Unable to get the version from the lldb binary ${lldbExe}`);
process.exit(1);
}
console.log(`Installing llnode for ${lldbExe}, lldb version ${lldbVersion}`);
console.log(`\nLooking for llvm-config for lldb ${lldbVersion}...`);
const llvmConfig = getLlvmConfig(lldbVersion);
if (!llvmConfig) {
console.log('No llvm-config found');
} else {
console.log(`Using llvm-config in ${llvmConfig}`);
}
console.log(`\nLooking for headers for lldb ${lldbVersion}...`);
const includeDir = getIncludeDir(llvmConfig);
if (!includeDir) {
console.log('Could not find the headers, will download them later');
} else {
console.log(`Found lldb headers in ${includeDir}`);
}
console.log(`\nLooking for shared libraries for lldb ${lldbVersion}...`);
const lib = getLib(lldbExe, llvmConfig);
if (!lib.dir) {
console.log(`Could not find non-versioned lib${lib.name}.so in the system`);
console.log('Plugin symbols will be resolved by the lldb executable ' +
'at runtime');
console.log(`Addon will be linked to ${lib.so}`);
} else {
console.log(`Found lib${lib.name}.so in ${lib.dir}`);
}
return {
executable: lldbExe,
version: lldbVersion,
includeDir: includeDir,
libDir: lib.dir,
libName: lib.name,
libPath: lib.so
};
}
module.exports = {
getLldbInstallation
};