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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "jit/PerfSpewer.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/SizePrintfMacros.h"
#ifdef XP_UNIX
# include <unistd.h>
#endif
#ifdef JS_ION_PERF
# include "jit/JitSpewer.h"
# include "jit/LIR.h"
# include "jit/MIR.h"
# include "jit/MIRGraph.h"
#endif
#include "vm/MutexIDs.h"
#ifndef PERF_SPEW_DIR
# define PERF_SPEW_DIR "/tmp/"
#endif
using namespace js;
using namespace js::jit;
#define PERF_MODE_NONE 1
#define PERF_MODE_FUNC 2
#define PERF_MODE_BLOCK 3
#ifdef JS_ION_PERF
static uint32_t PerfMode = 0;
static bool PerfChecked = false;
static FILE* PerfFilePtr = nullptr;
static js::Mutex* PerfMutex;
static bool
openPerfMap(const char* dir)
{
const ssize_t bufferSize = 256;
char filenameBuffer[bufferSize];
if (snprintf(filenameBuffer, bufferSize, "%sperf-%d.map", dir, getpid()) >= bufferSize)
return false;
MOZ_ASSERT(!PerfFilePtr);
PerfFilePtr = fopen(filenameBuffer, "a");
if (!PerfFilePtr)
return false;
return true;
}
void
js::jit::CheckPerf() {
if (!PerfChecked) {
const char* env = getenv("IONPERF");
if (env == nullptr) {
PerfMode = PERF_MODE_NONE;
fprintf(stderr, "Warning: JIT perf reporting requires IONPERF set to \"block\" or \"func\". ");
fprintf(stderr, "Perf mapping will be deactivated.\n");
} else if (!strcmp(env, "none")) {
PerfMode = PERF_MODE_NONE;
} else if (!strcmp(env, "block")) {
PerfMode = PERF_MODE_BLOCK;
} else if (!strcmp(env, "func")) {
PerfMode = PERF_MODE_FUNC;
} else {
fprintf(stderr, "Use IONPERF=func to record at function granularity\n");
fprintf(stderr, "Use IONPERF=block to record at basic block granularity\n");
fprintf(stderr, "\n");
fprintf(stderr, "Be advised that using IONPERF will cause all scripts\n");
fprintf(stderr, "to be leaked.\n");
exit(0);
}
if (PerfMode != PERF_MODE_NONE) {
PerfMutex = js_new<js::Mutex>(mutexid::PerfSpewer);
if (!PerfMutex)
MOZ_CRASH("failed to allocate PerfMutex");
if (openPerfMap(PERF_SPEW_DIR)) {
PerfChecked = true;
return;
}
fprintf(stderr, "Failed to open perf map file. Disabling IONPERF.\n");
PerfMode = PERF_MODE_NONE;
}
PerfChecked = true;
}
}
bool
js::jit::PerfBlockEnabled() {
MOZ_ASSERT(PerfMode);
return PerfMode == PERF_MODE_BLOCK;
}
bool
js::jit::PerfFuncEnabled() {
MOZ_ASSERT(PerfMode);
return PerfMode == PERF_MODE_FUNC;
}
static bool
lockPerfMap(void)
{
if (!PerfEnabled())
return false;
PerfMutex->lock();
MOZ_ASSERT(PerfFilePtr);
return true;
}
static void
unlockPerfMap()
{
MOZ_ASSERT(PerfFilePtr);
fflush(PerfFilePtr);
PerfMutex->unlock();
}
uint32_t PerfSpewer::nextFunctionIndex = 0;
bool
PerfSpewer::startBasicBlock(MBasicBlock* blk,
MacroAssembler& masm)
{
if (!PerfBlockEnabled())
return true;
const char* filename = blk->info().script()->filename();
unsigned lineNumber, columnNumber;
if (blk->pc()) {
lineNumber = PCToLineNumber(blk->info().script(),
blk->pc(),
&columnNumber);
} else {
lineNumber = 0;
columnNumber = 0;
}
Record r(filename, lineNumber, columnNumber, blk->id());
masm.bind(&r.start);
return basicBlocks_.append(r);
}
bool
PerfSpewer::endBasicBlock(MacroAssembler& masm)
{
if (!PerfBlockEnabled())
return true;
masm.bind(&basicBlocks_.back().end);
return true;
}
bool
PerfSpewer::noteEndInlineCode(MacroAssembler& masm)
{
if (!PerfBlockEnabled())
return true;
masm.bind(&endInlineCode);
return true;
}
void
PerfSpewer::writeProfile(JSScript* script,
JitCode* code,
MacroAssembler& masm)
{
if (PerfFuncEnabled()) {
if (!lockPerfMap())
return;
uint32_t thisFunctionIndex = nextFunctionIndex++;
size_t size = code->instructionsSize();
if (size > 0) {
fprintf(PerfFilePtr, "%p %" PRIxSIZE " %s:%" PRIuSIZE ": Func%02d\n",
code->raw(),
size,
script->filename(),
script->lineno(),
thisFunctionIndex);
}
unlockPerfMap();
return;
}
if (PerfBlockEnabled() && basicBlocks_.length() > 0) {
if (!lockPerfMap())
return;
uint32_t thisFunctionIndex = nextFunctionIndex++;
uintptr_t funcStart = uintptr_t(code->raw());
uintptr_t funcEndInlineCode = funcStart + endInlineCode.offset();
uintptr_t funcEnd = funcStart + code->instructionsSize();
// function begins with the prologue, which is located before the first basic block
size_t prologueSize = basicBlocks_[0].start.offset();
if (prologueSize > 0) {
fprintf(PerfFilePtr, "%" PRIxSIZE " %" PRIxSIZE " %s:%" PRIuSIZE ": Func%02d-Prologue\n",
funcStart, prologueSize, script->filename(), script->lineno(), thisFunctionIndex);
}
uintptr_t cur = funcStart + prologueSize;
for (uint32_t i = 0; i < basicBlocks_.length(); i++) {
Record& r = basicBlocks_[i];
uintptr_t blockStart = funcStart + r.start.offset();
uintptr_t blockEnd = funcStart + r.end.offset();
MOZ_ASSERT(cur <= blockStart);
if (cur < blockStart) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxPTR " %s:%" PRIuSIZE ": Func%02d-Block?\n",
cur, blockStart - cur,
script->filename(), script->lineno(),
thisFunctionIndex);
}
cur = blockEnd;
size_t size = blockEnd - blockStart;
if (size > 0) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxSIZE " %s:%d:%d: Func%02d-Block%d\n",
blockStart, size,
r.filename, r.lineNumber, r.columnNumber,
thisFunctionIndex, r.id);
}
}
MOZ_ASSERT(cur <= funcEndInlineCode);
if (cur < funcEndInlineCode) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxPTR " %s:%" PRIuSIZE ": Func%02d-Epilogue\n",
cur, funcEndInlineCode - cur,
script->filename(), script->lineno(),
thisFunctionIndex);
}
MOZ_ASSERT(funcEndInlineCode <= funcEnd);
if (funcEndInlineCode < funcEnd) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxPTR " %s:%" PRIuSIZE ": Func%02d-OOL\n",
funcEndInlineCode, funcEnd - funcEndInlineCode,
script->filename(), script->lineno(),
thisFunctionIndex);
}
unlockPerfMap();
return;
}
}
void
js::jit::writePerfSpewerBaselineProfile(JSScript* script, JitCode* code)
{
if (!PerfEnabled())
return;
if (!lockPerfMap())
return;
size_t size = code->instructionsSize();
if (size > 0) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxSIZE " %s:%" PRIuSIZE ": Baseline\n",
reinterpret_cast<uintptr_t>(code->raw()),
size, script->filename(), script->lineno());
}
unlockPerfMap();
}
void
js::jit::writePerfSpewerJitCodeProfile(JitCode* code, const char* msg)
{
if (!code || !PerfEnabled())
return;
if (!lockPerfMap())
return;
size_t size = code->instructionsSize();
if (size > 0) {
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxSIZE " %s (%p 0x%" PRIxSIZE ")\n",
reinterpret_cast<uintptr_t>(code->raw()),
size, msg, code->raw(), size);
}
unlockPerfMap();
}
void
js::jit::writePerfSpewerWasmFunctionMap(uintptr_t base, uintptr_t size,
const char* filename, unsigned lineno, unsigned colIndex,
const char* funcName)
{
if (!PerfFuncEnabled() || size == 0U)
return;
if (!lockPerfMap())
return;
fprintf(PerfFilePtr, "%" PRIxPTR " %" PRIxPTR " %s:%u:%u: Function %s\n",
base, size, filename, lineno, colIndex, funcName);
unlockPerfMap();
}
#endif // defined (JS_ION_PERF)
|