[compiler-rt] r364231 - (Reland with changes) Adding a function for setting coverage output file.
Vedant Kumar via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 16 13:59:28 PDT 2019
> On Sep 16, 2019, at 1:57 PM, Sajjad Mirza <sajjadm at google.com> wrote:
>
> Hi Vedant,
>
> Can you paste the output of llvm-cov? From the RUN at line 8 line, without piping to FileCheck.
Ah, sorry for not including this. Here we go:
~/src/builds/llvm-project-master-RA (1) $ ./bin/llvm-cov show -instr-profile /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profdata /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp
1| |// Test that the specified output merges the profiling data.
2| |// Run the program twice so that the counters accumulate.
3| |// RUN: %clang -fprofile-instr-generate -fcoverage-mapping -o %t %s
4| |// RUN: %run %t %t.merging.profraw
5| |// RUN: %run %t %t.merging.profraw
6| |// RUN: test -f %t.merging.profraw
7| |// RUN: llvm-profdata merge -o %t.merging.profdata %t.merging.profraw
8| |// RUN: llvm-cov show -instr-profile %t.merging.profdata %t | FileCheck %s --match-full-lines
9| |// RUN: rm %t.merging.profdata %t.merging.profraw
10| |#include <stdio.h>
11| |
12| |extern void __llvm_profile_set_file_object(FILE *, int);
13| |
14| 21|int main(int argc, const char *argv[]) {
15| 21| if (argc < 2)
16| 0| return 1;
17| 21|
18| 21| FILE *F = fopen(argv[1], "r+b");
19| 21| if (!F) {
20| 0| // File might not exist, try opening with truncation
21| 0| F = fopen(argv[1], "w+b");
22| 0| }
23| 21| __llvm_profile_set_file_object(F, 1);
24| 21|
25| 21| return 0;
26| 21|}
27| |// CHECK: 10| |#include <stdio.h>
28| |// CHECK: 11| |
29| |// CHECK: 12| |extern void __llvm_profile_set_file_object(FILE *, int);
30| |// CHECK: 13| |
31| |// CHECK: 14| 2|int main(int argc, const char *argv[]) {
32| |// CHECK: 15| 2| if (argc < 2)
33| |// CHECK: 16| 0| return 1;
34| |// CHECK: 17| 2|
35| |// CHECK: 18| 2| FILE *F = fopen(argv[1], "r+b");
36| |// CHECK: 19| 2| if (!F) {
37| |// CHECK: 20| 1| // File might not exist, try opening with truncation
38| |// CHECK: 21| 1| F = fopen(argv[1], "w+b");
39| |// CHECK: 22| 1| }
40| |// CHECK: 23| 2| __llvm_profile_set_file_object(F, 1);
41| |// CHECK: 24| 2|
42| |// CHECK: 25| 2| return 0;
43| |// CHECK: 26| 2|}
vedant
>
> Sajjad
>
> On Mon, Sep 16, 2019 at 12:09 PM Vedant Kumar <vedant_kumar at apple.com <mailto:vedant_kumar at apple.com>> wrote:
> Hi Sajjad,
>
> I've consistently seen one of the tests added here fail on my Mac:
>
> Profile-x86_64 :: instrprof-set-file-object-merging.c
> Profile-x86_64h :: instrprof-set-file-object-merging.c
>
> Do you have any ideas as to what might be happening? Here is the output I see:
>
> ********************
> FAIL: Profile-x86_64h :: instrprof-set-file-object-merging.c (208 of 234)
> ******************** TEST 'Profile-x86_64h :: instrprof-set-file-object-merging.c' FAILED ********************
> Script:
> --
> : 'RUN: at line 3'; /Users/vsk/src/builds/llvm-project-master-RA/./bin/clang -arch x86_64h -stdlib=libc++ -mmacosx-version-min=10.9 -isysroot /Applications/OSEng.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.Internal.sdk -fprofile-instr-generate -fcoverage-mapping -o /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp /Users/vsk/src/llvm-project-master/compiler-rt/test/profile/instrprof-set-file-object-merging.c
> : 'RUN: at line 4'; /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profraw
> : 'RUN: at line 5'; /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profraw
> : 'RUN: at line 6'; test -f /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profraw
> : 'RUN: at line 7'; llvm-profdata merge -o /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profdata /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profraw
> : 'RUN: at line 8'; llvm-cov show -instr-profile /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profdata /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp | FileCheck /Users/vsk/src/llvm-project-master/compiler-rt/test/profile/instrprof-set-file-object-merging.c --match-full-lines
> : 'RUN: at line 9'; rm /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profdata /Users/vsk/src/builds/llvm-project-master-RA/projects/compiler-rt/test/profile/Profile-x86_64h/Output/instrprof-set-file-object-merging.c.tmp.merging.profraw
> --
> Exit Code: 1
>
> Command Output (stderr):
> --
> /Users/vsk/src/llvm-project-master/compiler-rt/test/profile/instrprof-set-file-object-merging.c:31:11: error: CHECK: expected string not found in input
> // CHECK: 14| 2|int main(int argc, const char *argv[]) {
> ^
> <stdin>:14:2: note: scanning from here
> 14| 17|int main(int argc, const char *argv[]) {
> ^
> <stdin>:31:15: note: possible intended match here
> 31| |// CHECK: 14| 2|int main(int argc, const char *argv[]) {
> ^
>
> --
>
> thanks,
> vedant
>
> > On Jun 24, 2019, at 2:32 PM, Sajjad Mirza via llvm-commits <llvm-commits at lists.llvm.org <mailto:llvm-commits at lists.llvm.org>> wrote:
> >
> > Author: sajjadm
> > Date: Mon Jun 24 14:32:50 2019
> > New Revision: 364231
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=364231&view=rev <http://llvm.org/viewvc/llvm-project?rev=364231&view=rev>
> > Log:
> > (Reland with changes) Adding a function for setting coverage output file.
> >
> > Summary:
> > User code can open a file on its own and pass it to the runtime, rather than
> > specifying a name and having the runtime open the file. This supports the use
> > case where a process cannot open a file on its own but can receive a file
> > descriptor from another process.
> >
> > Relanding https://reviews.llvm.org/D62541 <https://reviews.llvm.org/D62541>. The original revision unlocked
> > the file before calling flush, this revision fixes that.
> >
> > Reviewers: Dor1s, davidxl
> >
> > Reviewed By: Dor1s
> >
> > Subscribers: #sanitizers, llvm-commits
> >
> > Tags: #sanitizers, #llvm
> >
> > Differential Revision: https://reviews.llvm.org/D63581 <https://reviews.llvm.org/D63581>
> >
> > Added:
> > compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c
> > compiler-rt/trunk/test/profile/instrprof-set-file-object.c
> > Modified:
> > compiler-rt/trunk/lib/profile/InstrProfiling.h
> > compiler-rt/trunk/lib/profile/InstrProfilingFile.c
> > compiler-rt/trunk/lib/profile/InstrProfilingUtil.c
> > compiler-rt/trunk/lib/profile/InstrProfilingUtil.h
> >
> > Modified: compiler-rt/trunk/lib/profile/InstrProfiling.h
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfiling.h?rev=364231&r1=364230&r2=364231&view=diff <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfiling.h?rev=364231&r1=364230&r2=364231&view=diff>
> > ==============================================================================
> > --- compiler-rt/trunk/lib/profile/InstrProfiling.h (original)
> > +++ compiler-rt/trunk/lib/profile/InstrProfiling.h Mon Jun 24 14:32:50 2019
> > @@ -10,6 +10,7 @@
> > #define PROFILE_INSTRPROFILING_H_
> >
> > #include "InstrProfilingPort.h"
> > +#include <stdio.h>
> >
> > #define INSTR_PROF_VISIBILITY COMPILER_RT_VISIBILITY
> > #include "InstrProfData.inc"
> > @@ -125,7 +126,7 @@ int __llvm_orderfile_write_file(void);
> > /*!
> > * \brief this is a wrapper interface to \c __llvm_profile_write_file.
> > * After this interface is invoked, a arleady dumped flag will be set
> > - * so that profile won't be dumped again during program exit.
> > + * so that profile won't be dumped again during program exit.
> > * Invocation of interface __llvm_profile_reset_counters will clear
> > * the flag. This interface is designed to be used to collect profile
> > * data from user selected hot regions. The use model is
> > @@ -157,6 +158,24 @@ int __llvm_orderfile_dump(void);
> > */
> > void __llvm_profile_set_filename(const char *Name);
> >
> > +/*!
> > + * \brief Set the FILE object for writing instrumentation data.
> > + *
> > + * Sets the FILE object to be used for subsequent calls to
> > + * \a __llvm_profile_write_file(). The profile file name set by environment
> > + * variable, command-line option, or calls to \a __llvm_profile_set_filename
> > + * will be ignored.
> > + *
> > + * \c File will not be closed after a call to \a __llvm_profile_write_file() but
> > + * it may be flushed. Passing NULL restores default behavior.
> > + *
> > + * If \c EnableMerge is nonzero, the runtime will always merge profiling data
> > + * with the contents of the profiling file. If EnableMerge is zero, the runtime
> > + * may still merge the data if it would have merged for another reason (for
> > + * example, because of a %m specifier in the file name).
> > + */
> > +void __llvm_profile_set_file_object(FILE *File, int EnableMerge);
> > +
> > /*! \brief Register to write instrumentation data to file at exit. */
> > int __llvm_profile_register_write_file_atexit(void);
> >
> >
> > Modified: compiler-rt/trunk/lib/profile/InstrProfilingFile.c
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingFile.c?rev=364231&r1=364230&r2=364231&view=diff <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingFile.c?rev=364231&r1=364230&r2=364231&view=diff>
> > ==============================================================================
> > --- compiler-rt/trunk/lib/profile/InstrProfilingFile.c (original)
> > +++ compiler-rt/trunk/lib/profile/InstrProfilingFile.c Mon Jun 24 14:32:50 2019
> > @@ -37,7 +37,7 @@
> > /* From where is profile name specified.
> > * The order the enumerators define their
> > * precedence. Re-order them may lead to
> > - * runtime behavior change. */
> > + * runtime behavior change. */
> > typedef enum ProfileNameSpecifier {
> > PNS_unknown = 0,
> > PNS_default,
> > @@ -89,9 +89,27 @@ typedef struct lprofFilename {
> > COMPILER_RT_WEAK lprofFilename lprofCurFilename = {0, 0, 0, 0, {0},
> > {0}, 0, 0, 0, PNS_unknown};
> >
> > +static int ProfileMergeRequested = 0;
> > +static int isProfileMergeRequested() { return ProfileMergeRequested; }
> > +static void setProfileMergeRequested(int EnableMerge) {
> > + ProfileMergeRequested = EnableMerge;
> > +}
> > +
> > +static FILE *ProfileFile = NULL;
> > +static FILE *getProfileFile() { return ProfileFile; }
> > +static void setProfileFile(FILE *File) { ProfileFile = File; }
> > +
> > +COMPILER_RT_VISIBILITY void __llvm_profile_set_file_object(FILE *File,
> > + int EnableMerge) {
> > + setProfileFile(File);
> > + setProfileMergeRequested(EnableMerge);
> > +}
> > +
> > static int getCurFilenameLength();
> > static const char *getCurFilename(char *FilenameBuf, int ForceUseBuf);
> > -static unsigned doMerging() { return lprofCurFilename.MergePoolSize; }
> > +static unsigned doMerging() {
> > + return lprofCurFilename.MergePoolSize || isProfileMergeRequested();
> > +}
> >
> > /* Return 1 if there is an error, otherwise return 0. */
> > static uint32_t fileWriter(ProfDataWriter *This, ProfDataIOVec *IOVecs,
> > @@ -225,11 +243,16 @@ static void createProfileDir(const char
> > * its instrumented shared libraries dump profile data into their own data file.
> > */
> > static FILE *openFileForMerging(const char *ProfileFileName, int *MergeDone) {
> > - FILE *ProfileFile;
> > + FILE *ProfileFile = NULL;
> > int rc;
> >
> > - createProfileDir(ProfileFileName);
> > - ProfileFile = lprofOpenFileEx(ProfileFileName);
> > + ProfileFile = getProfileFile();
> > + if (ProfileFile) {
> > + lprofLockFileHandle(ProfileFile);
> > + } else {
> > + createProfileDir(ProfileFileName);
> > + ProfileFile = lprofOpenFileEx(ProfileFileName);
> > + }
> > if (!ProfileFile)
> > return NULL;
> >
> > @@ -244,6 +267,16 @@ static FILE *openFileForMerging(const ch
> > return ProfileFile;
> > }
> >
> > +static FILE *getFileObject(const char *OutputName) {
> > + FILE *File;
> > + File = getProfileFile();
> > + if (File != NULL) {
> > + return File;
> > + }
> > +
> > + return fopen(OutputName, "ab");
> > +}
> > +
> > /* Write profile data to file \c OutputName. */
> > static int writeFile(const char *OutputName) {
> > int RetVal;
> > @@ -251,10 +284,10 @@ static int writeFile(const char *OutputN
> >
> > int MergeDone = 0;
> > VPMergeHook = &lprofMergeValueProfData;
> > - if (!doMerging())
> > - OutputFile = fopen(OutputName, "ab");
> > - else
> > + if (doMerging())
> > OutputFile = openFileForMerging(OutputName, &MergeDone);
> > + else
> > + OutputFile = getFileObject(OutputName);
> >
> > if (!OutputFile)
> > return -1;
> > @@ -265,7 +298,15 @@ static int writeFile(const char *OutputN
> > initFileWriter(&fileWriter, OutputFile);
> > RetVal = lprofWriteData(&fileWriter, lprofGetVPDataReader(), MergeDone);
> >
> > - fclose(OutputFile);
> > + if (OutputFile == getProfileFile()) {
> > + fflush(OutputFile);
> > + if (doMerging()) {
> > + lprofUnlockFileHandle(OutputFile);
> > + }
> > + } else {
> > + fclose(OutputFile);
> > + }
> > +
> > return RetVal;
> > }
> >
> > @@ -591,7 +632,7 @@ void __llvm_profile_initialize_file(void
> >
> > EnvFilenamePat = getFilenamePatFromEnv();
> > if (EnvFilenamePat) {
> > - /* Pass CopyFilenamePat = 1, to ensure that the filename would be valid
> > + /* Pass CopyFilenamePat = 1, to ensure that the filename would be valid
> > at the moment when __llvm_profile_write_file() gets executed. */
> > parseAndSetFilename(EnvFilenamePat, PNS_environment, 1);
> > return;
> > @@ -627,8 +668,7 @@ int __llvm_profile_write_file(void) {
> > int PDeathSig = 0;
> >
> > if (lprofProfileDumped()) {
> > - PROF_NOTE("Profile data not written to file: %s.\n",
> > - "already written");
> > + PROF_NOTE("Profile data not written to file: %s.\n", "already written");
> > return 0;
> > }
> >
> >
> > Modified: compiler-rt/trunk/lib/profile/InstrProfilingUtil.c
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingUtil.c?rev=364231&r1=364230&r2=364231&view=diff <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingUtil.c?rev=364231&r1=364230&r2=364231&view=diff>
> > ==============================================================================
> > --- compiler-rt/trunk/lib/profile/InstrProfilingUtil.c (original)
> > +++ compiler-rt/trunk/lib/profile/InstrProfilingUtil.c Mon Jun 24 14:32:50 2019
> > @@ -154,6 +154,26 @@ COMPILER_RT_VISIBILITY int lprofUnlockFd
> > #endif
> > }
> >
> > +COMPILER_RT_VISIBILITY int lprofLockFileHandle(FILE *F) {
> > + int fd;
> > +#if defined(_WIN32)
> > + fd = _fileno(F);
> > +#else
> > + fd = fileno(F);
> > +#endif
> > + return lprofLockFd(fd);
> > +}
> > +
> > +COMPILER_RT_VISIBILITY int lprofUnlockFileHandle(FILE *F) {
> > + int fd;
> > +#if defined(_WIN32)
> > + fd = _fileno(F);
> > +#else
> > + fd = fileno(F);
> > +#endif
> > + return lprofUnlockFd(fd);
> > +}
> > +
> > COMPILER_RT_VISIBILITY FILE *lprofOpenFileEx(const char *ProfileName) {
> > FILE *f;
> > int fd;
> >
> > Modified: compiler-rt/trunk/lib/profile/InstrProfilingUtil.h
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingUtil.h?rev=364231&r1=364230&r2=364231&view=diff <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingUtil.h?rev=364231&r1=364230&r2=364231&view=diff>
> > ==============================================================================
> > --- compiler-rt/trunk/lib/profile/InstrProfilingUtil.h (original)
> > +++ compiler-rt/trunk/lib/profile/InstrProfilingUtil.h Mon Jun 24 14:32:50 2019
> > @@ -23,6 +23,8 @@ unsigned __llvm_profile_get_dir_mode(voi
> >
> > int lprofLockFd(int fd);
> > int lprofUnlockFd(int fd);
> > +int lprofLockFileHandle(FILE *F);
> > +int lprofUnlockFileHandle(FILE *F);
> >
> > /*! Open file \c Filename for read+write with write
> > * lock for exclusive access. The caller will block
> >
> > Added: compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c?rev=364231&view=auto <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c?rev=364231&view=auto>
> > ==============================================================================
> > --- compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c (added)
> > +++ compiler-rt/trunk/test/profile/instrprof-set-file-object-merging.c Mon Jun 24 14:32:50 2019
> > @@ -0,0 +1,43 @@
> > +// Test that the specified output merges the profiling data.
> > +// Run the program twice so that the counters accumulate.
> > +// RUN: %clang -fprofile-instr-generate -fcoverage-mapping -o %t %s
> > +// RUN: %run %t %t.merging.profraw
> > +// RUN: %run %t %t.merging.profraw
> > +// RUN: test -f %t.merging.profraw
> > +// RUN: llvm-profdata merge -o %t.merging.profdata %t.merging.profraw
> > +// RUN: llvm-cov show -instr-profile %t.merging.profdata %t | FileCheck %s --match-full-lines
> > +// RUN: rm %t.merging.profdata %t.merging.profraw
> > +#include <stdio.h>
> > +
> > +extern void __llvm_profile_set_file_object(FILE *, int);
> > +
> > +int main(int argc, const char *argv[]) {
> > + if (argc < 2)
> > + return 1;
> > +
> > + FILE *F = fopen(argv[1], "r+b");
> > + if (!F) {
> > + // File might not exist, try opening with truncation
> > + F = fopen(argv[1], "w+b");
> > + }
> > + __llvm_profile_set_file_object(F, 1);
> > +
> > + return 0;
> > +}
> > +// CHECK: 10| |#include <stdio.h>
> > +// CHECK: 11| |
> > +// CHECK: 12| |extern void __llvm_profile_set_file_object(FILE *, int);
> > +// CHECK: 13| |
> > +// CHECK: 14| 2|int main(int argc, const char *argv[]) {
> > +// CHECK: 15| 2| if (argc < 2)
> > +// CHECK: 16| 0| return 1;
> > +// CHECK: 17| 2|
> > +// CHECK: 18| 2| FILE *F = fopen(argv[1], "r+b");
> > +// CHECK: 19| 2| if (!F) {
> > +// CHECK: 20| 1| // File might not exist, try opening with truncation
> > +// CHECK: 21| 1| F = fopen(argv[1], "w+b");
> > +// CHECK: 22| 1| }
> > +// CHECK: 23| 2| __llvm_profile_set_file_object(F, 1);
> > +// CHECK: 24| 2|
> > +// CHECK: 25| 2| return 0;
> > +// CHECK: 26| 2|}
> >
> > Added: compiler-rt/trunk/test/profile/instrprof-set-file-object.c
> > URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/profile/instrprof-set-file-object.c?rev=364231&view=auto <http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/profile/instrprof-set-file-object.c?rev=364231&view=auto>
> > ==============================================================================
> > --- compiler-rt/trunk/test/profile/instrprof-set-file-object.c (added)
> > +++ compiler-rt/trunk/test/profile/instrprof-set-file-object.c Mon Jun 24 14:32:50 2019
> > @@ -0,0 +1,31 @@
> > +// Test that the specified output has profiling data.
> > +// RUN: %clang -fprofile-instr-generate -fcoverage-mapping -o %t %s
> > +// RUN: %run %t %t.file.profraw
> > +// RUN: test -f %t.file.profraw
> > +// RUN: llvm-profdata merge -o %t.file.profdata %t.file.profraw
> > +// RUN: llvm-cov show -instr-profile %t.file.profdata %t | FileCheck %s --match-full-lines
> > +// RUN: rm %t.file.profraw %t.file.profdata
> > +#include <stdio.h>
> > +
> > +extern void __llvm_profile_set_file_object(FILE *, int);
> > +
> > +int main(int argc, const char *argv[]) {
> > + if (argc < 2)
> > + return 1;
> > +
> > + FILE *F = fopen(argv[1], "w+b");
> > + __llvm_profile_set_file_object(F, 0);
> > + return 0;
> > +}
> > +// CHECK: 8| |#include <stdio.h>
> > +// CHECK: 9| |
> > +// CHECK: 10| |extern void __llvm_profile_set_file_object(FILE *, int);
> > +// CHECK: 11| |
> > +// CHECK: 12| 1|int main(int argc, const char *argv[]) {
> > +// CHECK: 13| 1| if (argc < 2)
> > +// CHECK: 14| 0| return 1;
> > +// CHECK: 15| 1|
> > +// CHECK: 16| 1| FILE *F = fopen(argv[1], "w+b");
> > +// CHECK: 17| 1| __llvm_profile_set_file_object(F, 0);
> > +// CHECK: 18| 1| return 0;
> > +// CHECK: 19| 1|}
> >
> >
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