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mirror of https://github.com/rui314/mold.git synced 2024-12-26 18:02:30 +03:00

temporary

This commit is contained in:
Rui Ueyama 2021-01-09 21:21:45 +09:00
parent 95ce383b97
commit 4f46edac0c
4 changed files with 206 additions and 188 deletions

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@ -8,7 +8,7 @@ CPPFLAGS=-g -IoneTBB/include -pthread -std=c++20 -Wno-deprecated-volatile -Wno-s
LDFLAGS=-L$(TBB_LIBDIR) -Wl,-rpath=$(TBB_LIBDIR) -fuse-ld=lld -pthread
LIBS=-ltbb -ltbbmalloc -ltbbmalloc_proxy
OBJS=main.o object_file.o input_sections.o output_chunks.o mapfile.o perf.o \
linker_script.o archive_file.o sha1.o output_file.o
linker_script.o archive_file.o sha1.o output_file.o subprocess.o
mold: $(OBJS)
$(CXX) $(CFLAGS) $(OBJS) -o $@ $(LDFLAGS) $(LIBS)

187
main.cc
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@ -13,11 +13,8 @@
#include <unistd.h>
#include <unordered_set>
#define DAEMON_TIMEOUT 30
static tbb::task_group parser_tg;
static bool preloading;
static char *socket_tmpfile;
static bool is_text_file(MemoryMappedFile *mb) {
return mb->size() >= 4 &&
@ -792,190 +789,6 @@ static u64 parse_number(std::string opt, std::string_view value) {
return std::stol(std::string(value));
}
// Exiting from a program with large memory usage is slow --
// it may take a few hundred milliseconds. To hide the latency,
// we fork a child and let it do the actual linking work.
static std::function<void()> fork_child() {
int pipefd[2];
if (pipe(pipefd) == -1) {
perror("pipe");
exit(1);
}
pid_t pid = fork();
if (pid == -1) {
perror("fork");
exit(1);
}
if (pid > 0) {
// Parent
close(pipefd[1]);
int r = read(pipefd[0], (char[1]){}, 1);
_exit(r != 1);
}
// Child
close(pipefd[0]);
return [=]() { write(pipefd[1], (char []){1}, 1); };
}
static std::string compute_sha1(char **argv) {
SHA1 sha1;
for (int i = 0; argv[i]; i++)
if (!strcmp(argv[i], "-preload") && !strcmp(argv[i], "--preload"))
sha1.update((u8 *)argv[i], strlen(argv[i]) + 1);
u8 digest[21];
memset(digest, 0, sizeof(digest));
sha1.get_result(digest);
static char chars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
std::string res;
for (int i = 0; i < sizeof(digest); i += 3) {
u32 x = (digest[i + 2] << 16) | (digest[i + 1] << 8) | digest[i];
res += chars[x & 0b111111];
res += chars[(x >> 6) & 0b111111];
res += chars[(x >> 12) & 0b111111];
res += chars[(x >> 18) & 0b111111];
}
return res;
}
static void send_fd(int conn, int fd) {
struct iovec iov;
char dummy = '1';
iov.iov_base = &dummy;
iov.iov_len = 1;
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
char buf[CMSG_SPACE(sizeof(int))];
msg.msg_control = buf;
msg.msg_controllen = CMSG_LEN(sizeof(int));
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
*(int *)CMSG_DATA(cmsg) = fd;
if (sendmsg(conn, &msg, 0) == -1)
Error() << "sendmsg failed: " << strerror(errno);
}
static int recv_fd(int conn) {
struct iovec iov;
char buf[1];
iov.iov_base = buf;
iov.iov_len = sizeof(buf);
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
char cmsgbuf[CMSG_SPACE(sizeof(int))];
msg.msg_control = (caddr_t)cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
int len = recvmsg(conn, &msg, 0);
if (len <= 0)
Error() << "recvmsg failed: " << strerror(errno);
struct cmsghdr *cmsg;
cmsg = CMSG_FIRSTHDR(&msg);
return *(int *)CMSG_DATA(cmsg);
}
static bool resume_daemon(char **argv, int *code) {
int conn = socket(AF_UNIX, SOCK_STREAM, 0);
if (conn == -1)
Error() << "socket failed: " << strerror(errno);
std::string path = "/tmp/mold-" + compute_sha1(argv);
struct sockaddr_un name;
memset(&name, 0, sizeof(name));
name.sun_family = AF_UNIX;
memcpy(name.sun_path, path.data(), path.size());
if (connect(conn, (struct sockaddr *)&name, sizeof(name)) != 0) {
close(conn);
return false;
}
send_fd(conn, STDOUT_FILENO);
send_fd(conn, STDERR_FILENO);
int r = read(conn, (char[1]){}, 1);
*code = (r != 1);
return true;
}
static void daemonize(char **argv, std::function<void()> *wait_for_client,
std::function<void()> *on_complete) {
compute_sha1(argv);
if (daemon(1, 0) == -1)
Error() << "daemon failed: " << strerror(errno);
int sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock == -1)
Error() << "socket failed: " << strerror(errno);
socket_tmpfile = strdup(("/tmp/mold-" + compute_sha1(argv)).c_str());
struct sockaddr_un name;
memset(&name, 0, sizeof(name));
name.sun_family = AF_UNIX;
strcpy(name.sun_path, socket_tmpfile);
if (bind(sock, (struct sockaddr *)&name, sizeof(name)) == -1) {
if (errno != EADDRINUSE)
Error() << "bind failed: " << strerror(errno);
unlink(socket_tmpfile);
if (bind(sock, (struct sockaddr *)&name, sizeof(name)) == -1)
Error() << "bind failed: " << strerror(errno);
}
if (listen(sock, 0) == -1)
Error() << "listen failed: " << strerror(errno);
static int conn = -1;
*wait_for_client = [=]() {
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(sock, &rfds);
struct timeval tv;
tv.tv_sec = DAEMON_TIMEOUT;
tv.tv_usec = 0;
int res = select(sock + 1, &rfds, NULL, NULL, &tv);
if (res == -1)
Error() << "select failed: " << strerror(errno);
if (res == 0) {
std::cout << "timeout\n";
exit(0);
}
conn = accept(sock, NULL, NULL);
if (conn == -1)
Error() << "accept failed: " << strerror(errno);
};
*on_complete = [=]() { write(conn, (char []){1}, 1); };
}
static std::vector<std::string_view> read_response_file(std::string_view path) {
std::vector<std::string_view> vec;
MemoryMappedFile *mb = MemoryMappedFile::must_open(std::string(path));

11
mold.h
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@ -924,6 +924,17 @@ private:
void print_map();
//
// subprocess.cc
//
extern char *socket_tmpfile;
std::function<void()> fork_child();
bool resume_daemon(char **argv, int *code);
void daemonize(char **argv, std::function<void()> *wait_for_client,
std::function<void()> *on_complete);
//
// main.cc
//

194
subprocess.cc Normal file
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@ -0,0 +1,194 @@
#include "mold.h"
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#define DAEMON_TIMEOUT 30
char *socket_tmpfile;
// Exiting from a program with large memory usage is slow --
// it may take a few hundred milliseconds. To hide the latency,
// we fork a child and let it do the actual linking work.
std::function<void()> fork_child() {
int pipefd[2];
if (pipe(pipefd) == -1) {
perror("pipe");
exit(1);
}
pid_t pid = fork();
if (pid == -1) {
perror("fork");
exit(1);
}
if (pid > 0) {
// Parent
close(pipefd[1]);
int r = read(pipefd[0], (char[1]){}, 1);
_exit(r != 1);
}
// Child
close(pipefd[0]);
return [=]() { write(pipefd[1], (char []){1}, 1); };
}
static std::string compute_sha1(char **argv) {
SHA1 sha1;
for (int i = 0; argv[i]; i++)
if (!strcmp(argv[i], "-preload") && !strcmp(argv[i], "--preload"))
sha1.update((u8 *)argv[i], strlen(argv[i]) + 1);
u8 digest[21];
memset(digest, 0, sizeof(digest));
sha1.get_result(digest);
static char chars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
std::string res;
for (int i = 0; i < sizeof(digest); i += 3) {
u32 x = (digest[i + 2] << 16) | (digest[i + 1] << 8) | digest[i];
res += chars[x & 0b111111];
res += chars[(x >> 6) & 0b111111];
res += chars[(x >> 12) & 0b111111];
res += chars[(x >> 18) & 0b111111];
}
return res;
}
static void send_fd(int conn, int fd) {
struct iovec iov;
char dummy = '1';
iov.iov_base = &dummy;
iov.iov_len = 1;
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
char buf[CMSG_SPACE(sizeof(int))];
msg.msg_control = buf;
msg.msg_controllen = CMSG_LEN(sizeof(int));
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
*(int *)CMSG_DATA(cmsg) = fd;
if (sendmsg(conn, &msg, 0) == -1)
Error() << "sendmsg failed: " << strerror(errno);
}
static int recv_fd(int conn) {
struct iovec iov;
char buf[1];
iov.iov_base = buf;
iov.iov_len = sizeof(buf);
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
char cmsgbuf[CMSG_SPACE(sizeof(int))];
msg.msg_control = (caddr_t)cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
int len = recvmsg(conn, &msg, 0);
if (len <= 0)
Error() << "recvmsg failed: " << strerror(errno);
struct cmsghdr *cmsg;
cmsg = CMSG_FIRSTHDR(&msg);
return *(int *)CMSG_DATA(cmsg);
}
bool resume_daemon(char **argv, int *code) {
int conn = socket(AF_UNIX, SOCK_STREAM, 0);
if (conn == -1)
Error() << "socket failed: " << strerror(errno);
std::string path = "/tmp/mold-" + compute_sha1(argv);
struct sockaddr_un name;
memset(&name, 0, sizeof(name));
name.sun_family = AF_UNIX;
memcpy(name.sun_path, path.data(), path.size());
if (connect(conn, (struct sockaddr *)&name, sizeof(name)) != 0) {
close(conn);
return false;
}
send_fd(conn, STDOUT_FILENO);
send_fd(conn, STDERR_FILENO);
int r = read(conn, (char[1]){}, 1);
*code = (r != 1);
return true;
}
void daemonize(char **argv, std::function<void()> *wait_for_client,
std::function<void()> *on_complete) {
compute_sha1(argv);
if (daemon(1, 0) == -1)
Error() << "daemon failed: " << strerror(errno);
int sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock == -1)
Error() << "socket failed: " << strerror(errno);
socket_tmpfile = strdup(("/tmp/mold-" + compute_sha1(argv)).c_str());
struct sockaddr_un name;
memset(&name, 0, sizeof(name));
name.sun_family = AF_UNIX;
strcpy(name.sun_path, socket_tmpfile);
if (bind(sock, (struct sockaddr *)&name, sizeof(name)) == -1) {
if (errno != EADDRINUSE)
Error() << "bind failed: " << strerror(errno);
unlink(socket_tmpfile);
if (bind(sock, (struct sockaddr *)&name, sizeof(name)) == -1)
Error() << "bind failed: " << strerror(errno);
}
if (listen(sock, 0) == -1)
Error() << "listen failed: " << strerror(errno);
static int conn = -1;
*wait_for_client = [=]() {
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(sock, &rfds);
struct timeval tv;
tv.tv_sec = DAEMON_TIMEOUT;
tv.tv_usec = 0;
int res = select(sock + 1, &rfds, NULL, NULL, &tv);
if (res == -1)
Error() << "select failed: " << strerror(errno);
if (res == 0) {
std::cout << "timeout\n";
exit(0);
}
conn = accept(sock, NULL, NULL);
if (conn == -1)
Error() << "accept failed: " << strerror(errno);
unlink(socket_tmpfile);
};
*on_complete = [=]() { write(conn, (char []){1}, 1); };
}