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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	api/exceptions.cc	Lines:	66	66	100.0 %
Date:	2022-06-01 04:16:02	Branches:	21	28	75.0 %


// This file contains implementation of error APIs exposed in node.h

#include "env-inl.h"
#include "node.h"
#include "node_errors.h"
#include "util-inl.h"
#include "uv.h"
#include "v8.h"

#include <cstring>

namespace node {

using v8::Context;
using v8::Exception;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::String;
using v8::Value;

Local<Value> ErrnoException(Isolate* isolate,
                            int errorno,
                            const char* syscall,
                            const char* msg,
                            const char* path) {
  Environment* env = Environment::GetCurrent(isolate);
  CHECK_NOT_NULL(env);

  Local<Value> e;
  Local<String> estring = OneByteString(isolate, errors::errno_string(errorno));
  if (msg == nullptr || msg[0] == '\0') {
    msg = strerror(errorno);
  }
  Local<String> message = OneByteString(isolate, msg);

  Local<String> cons =
      String::Concat(isolate, estring, FIXED_ONE_BYTE_STRING(isolate, ", "));
  cons = String::Concat(isolate, cons, message);

  Local<String> path_string;
  if (path != nullptr) {
    // FIXME(bnoordhuis) It's questionable to interpret the file path as UTF-8.
    path_string = String::NewFromUtf8(isolate, path).ToLocalChecked();
  }

  if (path_string.IsEmpty() == false) {
    cons = String::Concat(isolate, cons, FIXED_ONE_BYTE_STRING(isolate, " '"));
    cons = String::Concat(isolate, cons, path_string);
    cons = String::Concat(isolate, cons, FIXED_ONE_BYTE_STRING(isolate, "'"));
  }
  e = Exception::Error(cons);

  Local<Context> context = env->context();
  Local<Object> obj = e.As<Object>();
  obj->Set(context,
           env->errno_string(),
           Integer::New(isolate, errorno)).Check();
  obj->Set(context, env->code_string(), estring).Check();

  if (path_string.IsEmpty() == false) {
    obj->Set(context, env->path_string(), path_string).Check();
  }

  if (syscall != nullptr) {
    obj->Set(context,
             env->syscall_string(),
             OneByteString(isolate, syscall)).Check();
  }

  return e;
}

static Local<String> StringFromPath(Isolate* isolate, const char* path) {
#ifdef _WIN32
  if (strncmp(path, "\\\\?\\UNC\\", 8) == 0) {
    return String::Concat(
        isolate,
        FIXED_ONE_BYTE_STRING(isolate, "\\\\"),
        String::NewFromUtf8(isolate, path + 8).ToLocalChecked());
  } else if (strncmp(path, "\\\\?\\", 4) == 0) {
    return String::NewFromUtf8(isolate, path + 4).ToLocalChecked();
  }
#endif

  return String::NewFromUtf8(isolate, path).ToLocalChecked();
}


Local<Value> UVException(Isolate* isolate,
                         int errorno,
                         const char* syscall,
                         const char* msg,
                         const char* path,
                         const char* dest) {
  Environment* env = Environment::GetCurrent(isolate);
  CHECK_NOT_NULL(env);

  if (!msg || !msg[0])
    msg = uv_strerror(errorno);

  Local<String> js_code = OneByteString(isolate, uv_err_name(errorno));
  Local<String> js_syscall = OneByteString(isolate, syscall);
  Local<String> js_path;
  Local<String> js_dest;

  Local<String> js_msg = js_code;
  js_msg =
      String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, ": "));
  js_msg = String::Concat(isolate, js_msg, OneByteString(isolate, msg));
  js_msg =
      String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, ", "));
  js_msg = String::Concat(isolate, js_msg, js_syscall);

  if (path != nullptr) {
    js_path = StringFromPath(isolate, path);

    js_msg =
        String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, " '"));
    js_msg = String::Concat(isolate, js_msg, js_path);
    js_msg =
        String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, "'"));
  }

  if (dest != nullptr) {
    js_dest = StringFromPath(isolate, dest);

    js_msg = String::Concat(
        isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, " -> '"));
    js_msg = String::Concat(isolate, js_msg, js_dest);
    js_msg =
        String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, "'"));
  }

  Local<Object> e =
    Exception::Error(js_msg)->ToObject(isolate->GetCurrentContext())
      .ToLocalChecked();

  Local<Context> context = env->context();
  e->Set(context,
         env->errno_string(),
         Integer::New(isolate, errorno)).Check();
  e->Set(context, env->code_string(), js_code).Check();
  e->Set(context, env->syscall_string(), js_syscall).Check();
  if (!js_path.IsEmpty())
    e->Set(context, env->path_string(), js_path).Check();
  if (!js_dest.IsEmpty())
    e->Set(context, env->dest_string(), js_dest).Check();

  return e;
}

#ifdef _WIN32
// Does about the same as strerror(),
// but supports all windows error messages
static const char* winapi_strerror(const int errorno, bool* must_free) {
  char* errmsg = nullptr;

  FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
                    FORMAT_MESSAGE_IGNORE_INSERTS,
                nullptr,
                errorno,
                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                reinterpret_cast<LPTSTR>(&errmsg),
                0,
                nullptr);

  if (errmsg) {
    *must_free = true;

    // Remove trailing newlines
    for (int i = strlen(errmsg) - 1;
         i >= 0 && (errmsg[i] == '\n' || errmsg[i] == '\r');
         i--) {
      errmsg[i] = '\0';
    }

    return errmsg;
  } else {
    // FormatMessage failed
    *must_free = false;
    return "Unknown error";
  }
}

Local<Value> WinapiErrnoException(Isolate* isolate,
                                  int errorno,
                                  const char* syscall,
                                  const char* msg,
                                  const char* path) {
  Environment* env = Environment::GetCurrent(isolate);
  CHECK_NOT_NULL(env);
  Local<Value> e;
  bool must_free = false;
  if (!msg || !msg[0]) {
    msg = winapi_strerror(errorno, &must_free);
  }
  Local<String> message = OneByteString(isolate, msg);

  if (path) {
    Local<String> cons1 =
        String::Concat(isolate, message, FIXED_ONE_BYTE_STRING(isolate, " '"));
    Local<String> cons2 = String::Concat(
        isolate,
        cons1,
        String::NewFromUtf8(isolate, path).ToLocalChecked());
    Local<String> cons3 =
        String::Concat(isolate, cons2, FIXED_ONE_BYTE_STRING(isolate, "'"));
    e = Exception::Error(cons3);
  } else {
    e = Exception::Error(message);
  }

  Local<Context> context = env->context();
  Local<Object> obj = e.As<Object>();
  obj->Set(context, env->errno_string(), Integer::New(isolate, errorno))
      .Check();

  if (path != nullptr) {
    obj->Set(context,
             env->path_string(),
             String::NewFromUtf8(isolate, path).ToLocalChecked())
        .Check();
  }

  if (syscall != nullptr) {
    obj->Set(context,
             env->syscall_string(),
             OneByteString(isolate, syscall))
        .Check();
  }

  if (must_free) {
    LocalFree(const_cast<char*>(msg));
  }

  return e;
}
#endif  // _WIN32

// Implement the legacy name exposed in node.h. This has not been in fact
// fatal any more, as the user can handle the exception in the
// TryCatch by listening to `uncaughtException`.
// TODO(joyeecheung): deprecate it in favor of a more accurate name.
void FatalException(Isolate* isolate, const v8::TryCatch& try_catch) {
  errors::TriggerUncaughtException(isolate, try_catch);
}

}  // namespace node


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			// This file contains implementation of error APIs exposed in node.h
2
3			#include "env-inl.h"
4			#include "node.h"
5			#include "node_errors.h"
6			#include "util-inl.h"
7			#include "uv.h"
8			#include "v8.h"
9
10			#include <cstring>
11
12			namespace node {
13
14			using v8::Context;
15			using v8::Exception;
16			using v8::Integer;
17			using v8::Isolate;
18			using v8::Local;
19			using v8::Object;
20			using v8::String;
21			using v8::Value;
22
23		8	Local<Value> ErrnoException(Isolate* isolate,
24			int errorno,
25			const char* syscall,
26			const char* msg,
27			const char* path) {
28		8	Environment* env = Environment::GetCurrent(isolate);
29	✗✓	8	CHECK_NOT_NULL(env);
30
31			Local<Value> e;
32		8	Local<String> estring = OneByteString(isolate, errors::errno_string(errorno));
33	✓✓✗✓	8	if (msg == nullptr \|\| msg[0] == '\0') {
34		7	msg = strerror(errorno);
35			}
36		8	Local<String> message = OneByteString(isolate, msg);
37
38			Local<String> cons =
39		8	String::Concat(isolate, estring, FIXED_ONE_BYTE_STRING(isolate, ", "));
40		8	cons = String::Concat(isolate, cons, message);
41
42			Local<String> path_string;
43	✓✓	8	if (path != nullptr) {
44			// FIXME(bnoordhuis) It's questionable to interpret the file path as UTF-8.
45		2	path_string = String::NewFromUtf8(isolate, path).ToLocalChecked();
46			}
47
48	✓✓	8	if (path_string.IsEmpty() == false) {
49		1	cons = String::Concat(isolate, cons, FIXED_ONE_BYTE_STRING(isolate, " '"));
50		1	cons = String::Concat(isolate, cons, path_string);
51		1	cons = String::Concat(isolate, cons, FIXED_ONE_BYTE_STRING(isolate, "'"));
52			}
53		8	e = Exception::Error(cons);
54
55		8	Local<Context> context = env->context();
56		8	Local<Object> obj = e.As<Object>();
57		8	obj->Set(context,
58			env->errno_string(),
59		32	Integer::New(isolate, errorno)).Check();
60		24	obj->Set(context, env->code_string(), estring).Check();
61
62	✓✓	8	if (path_string.IsEmpty() == false) {
63		3	obj->Set(context, env->path_string(), path_string).Check();
64			}
65
66	✓✗	8	if (syscall != nullptr) {
67		8	obj->Set(context,
68			env->syscall_string(),
69		32	OneByteString(isolate, syscall)).Check();
70			}
71
72		8	return e;
73			}
74
75		5097	static Local<String> StringFromPath(Isolate* isolate, const char* path) {
76			#ifdef _WIN32
77			if (strncmp(path, "\\\\?\\UNC\\", 8) == 0) {
78			return String::Concat(
79			isolate,
80			FIXED_ONE_BYTE_STRING(isolate, "\\\\"),
81			String::NewFromUtf8(isolate, path + 8).ToLocalChecked());
82			} else if (strncmp(path, "\\\\?\\", 4) == 0) {
83			return String::NewFromUtf8(isolate, path + 4).ToLocalChecked();
84			}
85			#endif
86
87		10194	return String::NewFromUtf8(isolate, path).ToLocalChecked();
88			}
89
90
91		5116	Local<Value> UVException(Isolate* isolate,
92			int errorno,
93			const char* syscall,
94			const char* msg,
95			const char* path,
96			const char* dest) {
97		5116	Environment* env = Environment::GetCurrent(isolate);
98	✗✓	5116	CHECK_NOT_NULL(env);
99
100	✗✓✗✗	5116	if (!msg \|\| !msg[0])
101		5116	msg = uv_strerror(errorno);
102
103		5116	Local<String> js_code = OneByteString(isolate, uv_err_name(errorno));
104		5116	Local<String> js_syscall = OneByteString(isolate, syscall);
105			Local<String> js_path;
106			Local<String> js_dest;
107
108		5116	Local<String> js_msg = js_code;
109			js_msg =
110		5116	String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, ": "));
111		5116	js_msg = String::Concat(isolate, js_msg, OneByteString(isolate, msg));
112			js_msg =
113		5116	String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, ", "));
114		5116	js_msg = String::Concat(isolate, js_msg, js_syscall);
115
116	✓✓	5116	if (path != nullptr) {
117		5085	js_path = StringFromPath(isolate, path);
118
119			js_msg =
120		5085	String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, " '"));
121		5085	js_msg = String::Concat(isolate, js_msg, js_path);
122			js_msg =
123		5085	String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, "'"));
124			}
125
126	✓✓	5116	if (dest != nullptr) {
127		12	js_dest = StringFromPath(isolate, dest);
128
129			js_msg = String::Concat(
130		12	isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, " -> '"));
131		12	js_msg = String::Concat(isolate, js_msg, js_dest);
132			js_msg =
133		12	String::Concat(isolate, js_msg, FIXED_ONE_BYTE_STRING(isolate, "'"));
134			}
135
136			Local<Object> e =
137		10232	Exception::Error(js_msg)->ToObject(isolate->GetCurrentContext())
138		5116	.ToLocalChecked();
139
140		5116	Local<Context> context = env->context();
141		5116	e->Set(context,
142			env->errno_string(),
143		20464	Integer::New(isolate, errorno)).Check();
144		15348	e->Set(context, env->code_string(), js_code).Check();
145		15348	e->Set(context, env->syscall_string(), js_syscall).Check();
146	✓✓	5116	if (!js_path.IsEmpty())
147		15255	e->Set(context, env->path_string(), js_path).Check();
148	✓✓	5116	if (!js_dest.IsEmpty())
149		36	e->Set(context, env->dest_string(), js_dest).Check();
150
151		5116	return e;
152			}
153
154			#ifdef _WIN32
155			// Does about the same as strerror(),
156			// but supports all windows error messages
157			static const char* winapi_strerror(const int errorno, bool* must_free) {
158			char* errmsg = nullptr;
159
160			FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \| FORMAT_MESSAGE_FROM_SYSTEM \|
161			FORMAT_MESSAGE_IGNORE_INSERTS,
162			nullptr,
163			errorno,
164			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
165			reinterpret_cast<LPTSTR>(&errmsg),
166			0,
167			nullptr);
168
169			if (errmsg) {
170			*must_free = true;
171
172			// Remove trailing newlines
173			for (int i = strlen(errmsg) - 1;
174			i >= 0 && (errmsg[i] == '\n' \|\| errmsg[i] == '\r');
175			i--) {
176			errmsg[i] = '\0';
177			}
178
179			return errmsg;
180			} else {
181			// FormatMessage failed
182			*must_free = false;
183			return "Unknown error";
184			}
185			}
186
187			Local<Value> WinapiErrnoException(Isolate* isolate,
188			int errorno,
189			const char* syscall,
190			const char* msg,
191			const char* path) {
192			Environment* env = Environment::GetCurrent(isolate);
193			CHECK_NOT_NULL(env);
194			Local<Value> e;
195			bool must_free = false;
196			if (!msg \|\| !msg[0]) {
197			msg = winapi_strerror(errorno, &must_free);
198			}
199			Local<String> message = OneByteString(isolate, msg);
200
201			if (path) {
202			Local<String> cons1 =
203			String::Concat(isolate, message, FIXED_ONE_BYTE_STRING(isolate, " '"));
204			Local<String> cons2 = String::Concat(
205			isolate,
206			cons1,
207			String::NewFromUtf8(isolate, path).ToLocalChecked());
208			Local<String> cons3 =
209			String::Concat(isolate, cons2, FIXED_ONE_BYTE_STRING(isolate, "'"));
210			e = Exception::Error(cons3);
211			} else {
212			e = Exception::Error(message);
213			}
214
215			Local<Context> context = env->context();
216			Local<Object> obj = e.As<Object>();
217			obj->Set(context, env->errno_string(), Integer::New(isolate, errorno))
218			.Check();
219
220			if (path != nullptr) {
221			obj->Set(context,
222			env->path_string(),
223			String::NewFromUtf8(isolate, path).ToLocalChecked())
224			.Check();
225			}
226
227			if (syscall != nullptr) {
228			obj->Set(context,
229			env->syscall_string(),
230			OneByteString(isolate, syscall))
231			.Check();
232			}
233
234			if (must_free) {
235			LocalFree(const_cast<char*>(msg));
236			}
237
238			return e;
239			}
240			#endif // _WIN32
241
242			// Implement the legacy name exposed in node.h. This has not been in fact
243			// fatal any more, as the user can handle the exception in the
244			// TryCatch by listening to `uncaughtException`.
245			// TODO(joyeecheung): deprecate it in favor of a more accurate name.
246		1	void FatalException(Isolate* isolate, const v8::TryCatch& try_catch) {
247		1	errors::TriggerUncaughtException(isolate, try_catch);
248		1	}
249
250			} // namespace node