Bug Summary

File:projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
Warning:line 344, column 3
Value stored to 'str' is never read

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -triple i386-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name sanitizer_symbolizer_libcdep.cc -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu pentium4 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D HAVE_RPC_XDR_H=0 -D HAVE_TIRPC_RPC_XDR_H=0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/projects/compiler-rt/lib/sanitizer_common -I /build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn329677/include -I /build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/.. -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0/32 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/i386-pc-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -Wno-unused-parameter -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -Wno-unused-parameter -Wno-variadic-macros -Wno-non-virtual-dtor -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/projects/compiler-rt/lib/sanitizer_common -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -fvisibility-inlines-hidden -fno-builtin -fno-rtti -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-04-11-031539-24776-1 -x c++ /build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
1//===-- sanitizer_symbolizer_libcdep.cc -----------------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is shared between AddressSanitizer and ThreadSanitizer
11// run-time libraries.
12//===----------------------------------------------------------------------===//
13
14#include "sanitizer_allocator_internal.h"
15#include "sanitizer_internal_defs.h"
16#include "sanitizer_symbolizer_internal.h"
17
18namespace __sanitizer {
19
20Symbolizer *Symbolizer::GetOrInit() {
21 SpinMutexLock l(&init_mu_);
22 if (symbolizer_)
23 return symbolizer_;
24 symbolizer_ = PlatformInit();
25 CHECK(symbolizer_)do { __sanitizer::u64 v1 = (__sanitizer::u64)((symbolizer_));
__sanitizer::u64 v2 = (__sanitizer::u64)(0); if (__builtin_expect
(!!(!(v1 != v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 25, "(" "(symbolizer_)" ") " "!=" " (" "0" ")", v1, v2); } while
(false)
;
26 return symbolizer_;
27}
28
29// See sanitizer_symbolizer_fuchsia.cc.
30#if !SANITIZER_FUCHSIA0
31
32const char *ExtractToken(const char *str, const char *delims, char **result) {
33 uptr prefix_len = internal_strcspn(str, delims);
34 *result = (char*)InternalAlloc(prefix_len + 1);
35 internal_memcpy(*result, str, prefix_len);
36 (*result)[prefix_len] = '\0';
37 const char *prefix_end = str + prefix_len;
38 if (*prefix_end != '\0') prefix_end++;
39 return prefix_end;
40}
41
42const char *ExtractInt(const char *str, const char *delims, int *result) {
43 char *buff;
44 const char *ret = ExtractToken(str, delims, &buff);
45 if (buff != 0) {
46 *result = (int)internal_atoll(buff);
47 }
48 InternalFree(buff);
49 return ret;
50}
51
52const char *ExtractUptr(const char *str, const char *delims, uptr *result) {
53 char *buff;
54 const char *ret = ExtractToken(str, delims, &buff);
55 if (buff != 0) {
56 *result = (uptr)internal_atoll(buff);
57 }
58 InternalFree(buff);
59 return ret;
60}
61
62const char *ExtractTokenUpToDelimiter(const char *str, const char *delimiter,
63 char **result) {
64 const char *found_delimiter = internal_strstr(str, delimiter);
65 uptr prefix_len =
66 found_delimiter ? found_delimiter - str : internal_strlen(str);
67 *result = (char *)InternalAlloc(prefix_len + 1);
68 internal_memcpy(*result, str, prefix_len);
69 (*result)[prefix_len] = '\0';
70 const char *prefix_end = str + prefix_len;
71 if (*prefix_end != '\0') prefix_end += internal_strlen(delimiter);
72 return prefix_end;
73}
74
75SymbolizedStack *Symbolizer::SymbolizePC(uptr addr) {
76 BlockingMutexLock l(&mu_);
77 const char *module_name;
78 uptr module_offset;
79 ModuleArch arch;
80 SymbolizedStack *res = SymbolizedStack::New(addr);
81 if (!FindModuleNameAndOffsetForAddress(addr, &module_name, &module_offset,
82 &arch))
83 return res;
84 // Always fill data about module name and offset.
85 res->info.FillModuleInfo(module_name, module_offset, arch);
86 for (auto &tool : tools_) {
87 SymbolizerScope sym_scope(this);
88 if (tool.SymbolizePC(addr, res)) {
89 return res;
90 }
91 }
92 return res;
93}
94
95bool Symbolizer::SymbolizeData(uptr addr, DataInfo *info) {
96 BlockingMutexLock l(&mu_);
97 const char *module_name;
98 uptr module_offset;
99 ModuleArch arch;
100 if (!FindModuleNameAndOffsetForAddress(addr, &module_name, &module_offset,
101 &arch))
102 return false;
103 info->Clear();
104 info->module = internal_strdup(module_name);
105 info->module_offset = module_offset;
106 info->module_arch = arch;
107 for (auto &tool : tools_) {
108 SymbolizerScope sym_scope(this);
109 if (tool.SymbolizeData(addr, info)) {
110 return true;
111 }
112 }
113 return true;
114}
115
116bool Symbolizer::GetModuleNameAndOffsetForPC(uptr pc, const char **module_name,
117 uptr *module_address) {
118 BlockingMutexLock l(&mu_);
119 const char *internal_module_name = nullptr;
120 ModuleArch arch;
121 if (!FindModuleNameAndOffsetForAddress(pc, &internal_module_name,
122 module_address, &arch))
123 return false;
124
125 if (module_name)
126 *module_name = module_names_.GetOwnedCopy(internal_module_name);
127 return true;
128}
129
130void Symbolizer::Flush() {
131 BlockingMutexLock l(&mu_);
132 for (auto &tool : tools_) {
133 SymbolizerScope sym_scope(this);
134 tool.Flush();
135 }
136}
137
138const char *Symbolizer::Demangle(const char *name) {
139 BlockingMutexLock l(&mu_);
140 for (auto &tool : tools_) {
141 SymbolizerScope sym_scope(this);
142 if (const char *demangled = tool.Demangle(name))
143 return demangled;
144 }
145 return PlatformDemangle(name);
146}
147
148bool Symbolizer::FindModuleNameAndOffsetForAddress(uptr address,
149 const char **module_name,
150 uptr *module_offset,
151 ModuleArch *module_arch) {
152 const LoadedModule *module = FindModuleForAddress(address);
153 if (module == nullptr)
154 return false;
155 *module_name = module->full_name();
156 *module_offset = address - module->base_address();
157 *module_arch = module->arch();
158 return true;
159}
160
161void Symbolizer::RefreshModules() {
162 modules_.init();
163 fallback_modules_.fallbackInit();
164 RAW_CHECK(modules_.size() > 0)do { if (__builtin_expect(!!(!(modules_.size() > 0)), 0)) {
RawWrite("modules_.size() > 0"); Die(); } } while (0)
;
165 modules_fresh_ = true;
166}
167
168static const LoadedModule *SearchForModule(const ListOfModules &modules,
169 uptr address) {
170 for (uptr i = 0; i < modules.size(); i++) {
171 if (modules[i].containsAddress(address)) {
172 return &modules[i];
173 }
174 }
175 return nullptr;
176}
177
178const LoadedModule *Symbolizer::FindModuleForAddress(uptr address) {
179 bool modules_were_reloaded = false;
180 if (!modules_fresh_) {
181 RefreshModules();
182 modules_were_reloaded = true;
183 }
184 const LoadedModule *module = SearchForModule(modules_, address);
185 if (module) return module;
186
187 // dlopen/dlclose interceptors invalidate the module list, but when
188 // interception is disabled, we need to retry if the lookup fails in
189 // case the module list changed.
190#if !SANITIZER_INTERCEPT_DLOPEN_DLCLOSE
191 if (!modules_were_reloaded) {
192 RefreshModules();
193 module = SearchForModule(modules_, address);
194 if (module) return module;
195 }
196#endif
197
198 if (fallback_modules_.size()) {
199 module = SearchForModule(fallback_modules_, address);
200 }
201 return module;
202}
203
204// For now we assume the following protocol:
205// For each request of the form
206// <module_name> <module_offset>
207// passed to STDIN, external symbolizer prints to STDOUT response:
208// <function_name>
209// <file_name>:<line_number>:<column_number>
210// <function_name>
211// <file_name>:<line_number>:<column_number>
212// ...
213// <empty line>
214class LLVMSymbolizerProcess : public SymbolizerProcess {
215 public:
216 explicit LLVMSymbolizerProcess(const char *path) : SymbolizerProcess(path) {}
217
218 private:
219 bool ReachedEndOfOutput(const char *buffer, uptr length) const override {
220 // Empty line marks the end of llvm-symbolizer output.
221 return length >= 2 && buffer[length - 1] == '\n' &&
222 buffer[length - 2] == '\n';
223 }
224
225 // When adding a new architecture, don't forget to also update
226 // script/asan_symbolize.py and sanitizer_common.h.
227 void GetArgV(const char *path_to_binary,
228 const char *(&argv)[kArgVMax]) const override {
229#if defined(__x86_64h__)
230 const char* const kSymbolizerArch = "--default-arch=x86_64h";
231#elif defined(__x86_64__)
232 const char* const kSymbolizerArch = "--default-arch=x86_64";
233#elif defined(__i386__1)
234 const char* const kSymbolizerArch = "--default-arch=i386";
235#elif defined(__aarch64__)
236 const char* const kSymbolizerArch = "--default-arch=arm64";
237#elif defined(__arm__)
238 const char* const kSymbolizerArch = "--default-arch=arm";
239#elif defined(__powerpc64__) && __BYTE_ORDER__1234 == __ORDER_BIG_ENDIAN__4321
240 const char* const kSymbolizerArch = "--default-arch=powerpc64";
241#elif defined(__powerpc64__) && __BYTE_ORDER__1234 == __ORDER_LITTLE_ENDIAN__1234
242 const char* const kSymbolizerArch = "--default-arch=powerpc64le";
243#elif defined(__s390x__)
244 const char* const kSymbolizerArch = "--default-arch=s390x";
245#elif defined(__s390__)
246 const char* const kSymbolizerArch = "--default-arch=s390";
247#else
248 const char* const kSymbolizerArch = "--default-arch=unknown";
249#endif
250
251 const char *const inline_flag = common_flags()->symbolize_inline_frames
252 ? "--inlining=true"
253 : "--inlining=false";
254 int i = 0;
255 argv[i++] = path_to_binary;
256 argv[i++] = inline_flag;
257 argv[i++] = kSymbolizerArch;
258 argv[i++] = nullptr;
259 }
260};
261
262LLVMSymbolizer::LLVMSymbolizer(const char *path, LowLevelAllocator *allocator)
263 : symbolizer_process_(new(*allocator) LLVMSymbolizerProcess(path)) {}
264
265// Parse a <file>:<line>[:<column>] buffer. The file path may contain colons on
266// Windows, so extract tokens from the right hand side first. The column info is
267// also optional.
268static const char *ParseFileLineInfo(AddressInfo *info, const char *str) {
269 char *file_line_info = 0;
270 str = ExtractToken(str, "\n", &file_line_info);
271 CHECK(file_line_info)do { __sanitizer::u64 v1 = (__sanitizer::u64)((file_line_info
)); __sanitizer::u64 v2 = (__sanitizer::u64)(0); if (__builtin_expect
(!!(!(v1 != v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 271, "(" "(file_line_info)" ") " "!=" " (" "0" ")", v1, v2)
; } while (false)
;
272
273 if (uptr size = internal_strlen(file_line_info)) {
274 char *back = file_line_info + size - 1;
275 for (int i = 0; i < 2; ++i) {
276 while (back > file_line_info && IsDigit(*back)) --back;
277 if (*back != ':' || !IsDigit(back[1])) break;
278 info->column = info->line;
279 info->line = internal_atoll(back + 1);
280 // Truncate the string at the colon to keep only filename.
281 *back = '\0';
282 --back;
283 }
284 ExtractToken(file_line_info, "", &info->file);
285 }
286
287 InternalFree(file_line_info);
288 return str;
289}
290
291// Parses one or more two-line strings in the following format:
292// <function_name>
293// <file_name>:<line_number>[:<column_number>]
294// Used by LLVMSymbolizer, Addr2LinePool and InternalSymbolizer, since all of
295// them use the same output format.
296void ParseSymbolizePCOutput(const char *str, SymbolizedStack *res) {
297 bool top_frame = true;
298 SymbolizedStack *last = res;
299 while (true) {
300 char *function_name = 0;
301 str = ExtractToken(str, "\n", &function_name);
302 CHECK(function_name)do { __sanitizer::u64 v1 = (__sanitizer::u64)((function_name)
); __sanitizer::u64 v2 = (__sanitizer::u64)(0); if (__builtin_expect
(!!(!(v1 != v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 302, "(" "(function_name)" ") " "!=" " (" "0" ")", v1, v2);
} while (false)
;
303 if (function_name[0] == '\0') {
304 // There are no more frames.
305 InternalFree(function_name);
306 break;
307 }
308 SymbolizedStack *cur;
309 if (top_frame) {
310 cur = res;
311 top_frame = false;
312 } else {
313 cur = SymbolizedStack::New(res->info.address);
314 cur->info.FillModuleInfo(res->info.module, res->info.module_offset,
315 res->info.module_arch);
316 last->next = cur;
317 last = cur;
318 }
319
320 AddressInfo *info = &cur->info;
321 info->function = function_name;
322 str = ParseFileLineInfo(info, str);
323
324 // Functions and filenames can be "??", in which case we write 0
325 // to address info to mark that names are unknown.
326 if (0 == internal_strcmp(info->function, "??")) {
327 InternalFree(info->function);
328 info->function = 0;
329 }
330 if (0 == internal_strcmp(info->file, "??")) {
331 InternalFree(info->file);
332 info->file = 0;
333 }
334 }
335}
336
337// Parses a two-line string in the following format:
338// <symbol_name>
339// <start_address> <size>
340// Used by LLVMSymbolizer and InternalSymbolizer.
341void ParseSymbolizeDataOutput(const char *str, DataInfo *info) {
342 str = ExtractToken(str, "\n", &info->name);
343 str = ExtractUptr(str, " ", &info->start);
344 str = ExtractUptr(str, "\n", &info->size);
Value stored to 'str' is never read
345}
346
347bool LLVMSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
348 AddressInfo *info = &stack->info;
349 const char *buf = FormatAndSendCommand(
350 /*is_data*/ false, info->module, info->module_offset, info->module_arch);
351 if (buf) {
352 ParseSymbolizePCOutput(buf, stack);
353 return true;
354 }
355 return false;
356}
357
358bool LLVMSymbolizer::SymbolizeData(uptr addr, DataInfo *info) {
359 const char *buf = FormatAndSendCommand(
360 /*is_data*/ true, info->module, info->module_offset, info->module_arch);
361 if (buf) {
362 ParseSymbolizeDataOutput(buf, info);
363 info->start += (addr - info->module_offset); // Add the base address.
364 return true;
365 }
366 return false;
367}
368
369const char *LLVMSymbolizer::FormatAndSendCommand(bool is_data,
370 const char *module_name,
371 uptr module_offset,
372 ModuleArch arch) {
373 CHECK(module_name)do { __sanitizer::u64 v1 = (__sanitizer::u64)((module_name));
__sanitizer::u64 v2 = (__sanitizer::u64)(0); if (__builtin_expect
(!!(!(v1 != v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 373, "(" "(module_name)" ") " "!=" " (" "0" ")", v1, v2); }
while (false)
;
374 const char *is_data_str = is_data ? "DATA " : "";
375 if (arch == kModuleArchUnknown) {
376 if (internal_snprintf(buffer_, kBufferSize, "%s\"%s\" 0x%zx\n", is_data_str,
377 module_name,
378 module_offset) >= static_cast<int>(kBufferSize)) {
379 Report("WARNING: Command buffer too small");
380 return nullptr;
381 }
382 } else {
383 if (internal_snprintf(buffer_, kBufferSize, "%s\"%s:%s\" 0x%zx\n",
384 is_data_str, module_name, ModuleArchToString(arch),
385 module_offset) >= static_cast<int>(kBufferSize)) {
386 Report("WARNING: Command buffer too small");
387 return nullptr;
388 }
389 }
390 return symbolizer_process_->SendCommand(buffer_);
391}
392
393SymbolizerProcess::SymbolizerProcess(const char *path, bool use_forkpty)
394 : path_(path),
395 input_fd_(kInvalidFd((fd_t)-1)),
396 output_fd_(kInvalidFd((fd_t)-1)),
397 times_restarted_(0),
398 failed_to_start_(false),
399 reported_invalid_path_(false),
400 use_forkpty_(use_forkpty) {
401 CHECK(path_)do { __sanitizer::u64 v1 = (__sanitizer::u64)((path_)); __sanitizer
::u64 v2 = (__sanitizer::u64)(0); if (__builtin_expect(!!(!(v1
!= v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 401, "(" "(path_)" ") " "!=" " (" "0" ")", v1, v2); } while
(false)
;
402 CHECK_NE(path_[0], '\0')do { __sanitizer::u64 v1 = (__sanitizer::u64)((path_[0])); __sanitizer
::u64 v2 = (__sanitizer::u64)(('\0')); if (__builtin_expect(!
!(!(v1 != v2)), 0)) __sanitizer::CheckFailed("/build/llvm-toolchain-snapshot-7~svn329677/projects/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc"
, 402, "(" "(path_[0])" ") " "!=" " (" "('\\0')" ")", v1, v2)
; } while (false)
;
403}
404
405static bool IsSameModule(const char* path) {
406 if (const char* ProcessName = GetProcessName()) {
407 if (const char* SymbolizerName = StripModuleName(path)) {
408 return !internal_strcmp(ProcessName, SymbolizerName);
409 }
410 }
411 return false;
412}
413
414const char *SymbolizerProcess::SendCommand(const char *command) {
415 if (failed_to_start_)
416 return nullptr;
417 if (IsSameModule(path_)) {
418 Report("WARNING: Symbolizer was blocked from starting itself!\n");
419 failed_to_start_ = true;
420 return nullptr;
421 }
422 for (; times_restarted_ < kMaxTimesRestarted; times_restarted_++) {
423 // Start or restart symbolizer if we failed to send command to it.
424 if (const char *res = SendCommandImpl(command))
425 return res;
426 Restart();
427 }
428 if (!failed_to_start_) {
429 Report("WARNING: Failed to use and restart external symbolizer!\n");
430 failed_to_start_ = true;
431 }
432 return 0;
433}
434
435const char *SymbolizerProcess::SendCommandImpl(const char *command) {
436 if (input_fd_ == kInvalidFd((fd_t)-1) || output_fd_ == kInvalidFd((fd_t)-1))
437 return 0;
438 if (!WriteToSymbolizer(command, internal_strlen(command)))
439 return 0;
440 if (!ReadFromSymbolizer(buffer_, kBufferSize))
441 return 0;
442 return buffer_;
443}
444
445bool SymbolizerProcess::Restart() {
446 if (input_fd_ != kInvalidFd((fd_t)-1))
447 CloseFile(input_fd_);
448 if (output_fd_ != kInvalidFd((fd_t)-1))
449 CloseFile(output_fd_);
450 return StartSymbolizerSubprocess();
451}
452
453bool SymbolizerProcess::ReadFromSymbolizer(char *buffer, uptr max_length) {
454 if (max_length == 0)
455 return true;
456 uptr read_len = 0;
457 while (true) {
458 uptr just_read = 0;
459 bool success = ReadFromFile(input_fd_, buffer + read_len,
460 max_length - read_len - 1, &just_read);
461 // We can't read 0 bytes, as we don't expect external symbolizer to close
462 // its stdout.
463 if (!success || just_read == 0) {
464 Report("WARNING: Can't read from symbolizer at fd %d\n", input_fd_);
465 return false;
466 }
467 read_len += just_read;
468 if (ReachedEndOfOutput(buffer, read_len))
469 break;
470 if (read_len + 1 == max_length) {
471 Report("WARNING: Symbolizer buffer too small\n");
472 read_len = 0;
473 break;
474 }
475 }
476 buffer[read_len] = '\0';
477 return true;
478}
479
480bool SymbolizerProcess::WriteToSymbolizer(const char *buffer, uptr length) {
481 if (length == 0)
482 return true;
483 uptr write_len = 0;
484 bool success = WriteToFile(output_fd_, buffer, length, &write_len);
485 if (!success || write_len != length) {
486 Report("WARNING: Can't write to symbolizer at fd %d\n", output_fd_);
487 return false;
488 }
489 return true;
490}
491
492#endif // !SANITIZER_FUCHSIA
493
494} // namespace __sanitizer