[GCOV] Close file mapping handle on Windows, so flushed gcda files can be removed while the process is in execution
llvm-svn: 346300
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a8ffa52498
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@ -29,6 +29,8 @@
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#include <string.h>
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#if defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include "WindowsMMap.h"
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#else
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#include <sys/mman.h>
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@ -86,6 +88,9 @@ static uint64_t cur_buffer_size = 0;
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static uint64_t cur_pos = 0;
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static uint64_t file_size = 0;
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static int new_file = 0;
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#if defined(_WIN32)
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static HANDLE mmap_handle = NULL;
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#endif
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static int fd = -1;
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typedef void (*fn_ptr)();
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@ -255,6 +260,28 @@ static int map_file() {
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if (file_size == 0)
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return -1;
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#if defined(_WIN32)
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HANDLE mmap_fd;
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if (fd == -1)
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mmap_fd = INVALID_HANDLE_VALUE;
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else
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mmap_fd = (HANDLE)_get_osfhandle(fd);
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mmap_handle = CreateFileMapping(mmap_fd, NULL, PAGE_READWRITE, DWORD_HI(file_size), DWORD_LO(file_size), NULL);
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if (mmap_handle == NULL) {
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fprintf(stderr, "profiling: %s: cannot create file mapping: %d\n", filename,
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GetLastError());
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return -1;
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}
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write_buffer = MapViewOfFile(mmap_handle, FILE_MAP_WRITE, 0, 0, file_size);
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if (write_buffer == NULL) {
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fprintf(stderr, "profiling: %s: cannot map: %d\n", filename,
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GetLastError());
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CloseHandle(mmap_handle);
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return -1;
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}
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#else
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write_buffer = mmap(0, file_size, PROT_READ | PROT_WRITE,
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MAP_FILE | MAP_SHARED, fd, 0);
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if (write_buffer == (void *)-1) {
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@ -263,10 +290,30 @@ static int map_file() {
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strerror(errnum));
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return -1;
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}
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#endif
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return 0;
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}
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static void unmap_file() {
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#if defined(_WIN32)
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if (!FlushViewOfFile(write_buffer, file_size)) {
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fprintf(stderr, "profiling: %s: cannot flush mapped view: %d\n", filename,
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GetLastError());
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}
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if (!UnmapViewOfFile(write_buffer)) {
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fprintf(stderr, "profiling: %s: cannot unmap mapped view: %d\n", filename,
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GetLastError());
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}
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if (!CloseHandle(mmap_handle)) {
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fprintf(stderr, "profiling: %s: cannot close file mapping handle: %d\n", filename,
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GetLastError());
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}
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mmap_handle = NULL;
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#else
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if (msync(write_buffer, file_size, MS_SYNC) == -1) {
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int errnum = errno;
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fprintf(stderr, "profiling: %s: cannot msync: %s\n", filename,
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@ -277,6 +324,8 @@ static void unmap_file() {
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* is written and we don't care.
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*/
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(void)munmap(write_buffer, file_size);
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#endif
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write_buffer = NULL;
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file_size = 0;
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}
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@ -24,14 +24,6 @@
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#include "InstrProfiling.h"
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#ifdef __USE_FILE_OFFSET64
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# define DWORD_HI(x) (x >> 32)
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# define DWORD_LO(x) ((x) & 0xffffffff)
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#else
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# define DWORD_HI(x) (0)
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# define DWORD_LO(x) (x)
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#endif
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COMPILER_RT_VISIBILITY
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void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
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{
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@ -45,6 +45,14 @@
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#define LOCK_NB 4 /* don't block when locking */
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#define LOCK_UN 8 /* unlock */
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#ifdef __USE_FILE_OFFSET64
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# define DWORD_HI(x) (x >> 32)
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# define DWORD_LO(x) ((x) & 0xffffffff)
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#else
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# define DWORD_HI(x) (0)
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# define DWORD_LO(x) (x)
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#endif
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void *mmap(void *start, size_t length, int prot, int flags, int fd,
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off_t offset);
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@ -0,0 +1,16 @@
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int main(void) {
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__gcov_flush();
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if (remove("instrprof-gcov-__gcov_flush-multiple.gcda") != 0) {
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return 1;
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}
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__gcov_flush();
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__gcov_flush();
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if (remove("instrprof-gcov-__gcov_flush-multiple.gcda") != 0) {
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return 1;
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}
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return 0;
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}
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@ -0,0 +1,21 @@
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// CHECK: -: 0:Source:{{.*}}Inputs/instrprof-gcov-__gcov_flush-multiple.c
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// CHECK-NEXT: -: 0:Graph:instrprof-gcov-__gcov_flush-multiple.gcno
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// CHECK-NEXT: -: 0:Data:instrprof-gcov-__gcov_flush-multiple.gcda
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// CHECK-NEXT: -: 0:Runs:1
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// CHECK-NEXT: -: 0:Programs:1
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// CHECK-NEXT: #####: 1:int main(void) {
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// CHECK-NEXT: #####: 2: __gcov_flush();
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// CHECK-NEXT: -: 3:
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// CHECK-NEXT: #####: 4: if (remove("instrprof-gcov-__gcov_flush-multiple.gcda") != 0) {
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// CHECK-NEXT: #####: 5: return 1;
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// CHECK-NEXT: -: 6: }
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// CHECK-NEXT: -: 7:
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// CHECK-NEXT: #####: 8: __gcov_flush();
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// CHECK-NEXT: #####: 9: __gcov_flush();
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// CHECK-NEXT: -: 10:
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// CHECK-NEXT: #####: 11: if (remove("instrprof-gcov-__gcov_flush-multiple.gcda") != 0) {
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// CHECK-NEXT: #####: 12: return 1;
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// CHECK-NEXT: -: 13: }
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// CHECK-NEXT: -: 14:
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// CHECK-NEXT: 1: 15: return 0;
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// CHECK-NEXT: 1: 16:}
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@ -0,0 +1,10 @@
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RUN: mkdir -p %t.d
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RUN: cd %t.d
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RUN: %clang --coverage -o %t %S/Inputs/instrprof-gcov-__gcov_flush-multiple.c
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RUN: test -f instrprof-gcov-__gcov_flush-multiple.gcno
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RUN: rm -f instrprof-gcov-__gcov_flush-multiple.gcda
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RUN: %run %t
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RUN: llvm-cov gcov instrprof-gcov-__gcov_flush-multiple.gcda
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RUN: FileCheck --match-full-lines --strict-whitespace --input-file instrprof-gcov-__gcov_flush-multiple.c.gcov %S/Inputs/instrprof-gcov-__gcov_flush-multiple.c.gcov
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