ace26b380f
When LLVM_PROFILE_FILE is set incorrectly (e.g. multiple %c) and it falls back to use `default.profraw` name, but continuous mode is still set. This might cause signal bus in the following scenario. LLVM_PROFILE_FILE is set incorrectly (with "%c%c") for process A and B. Suppose A starts first and falls back to use `default.profraw` and mmaped its file content to memory. Later B starts and also falls back to use `default.profraw`, but it will truncate the file because online merging is disable when reseting to `default.profraw`. When A tries to update counter via mmaped memory, signal bus will occur. This fixes it by disabling continuous mode when reset to default.profraw.
22 lines
688 B
C
22 lines
688 B
C
// REQUIRES: darwin || linux
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// Test when LLVM_PROFILE_FILE is set incorrectly, it should fall backs to use default.profraw without runtime error.
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// Create & cd into a temporary directory.
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// RUN: rm -rf %t.dir && mkdir -p %t.dir && cd %t.dir
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// RUN: %clang -fprofile-instr-generate -fcoverage-mapping -mllvm -runtime-counter-relocation=true -o %t.exe %s
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// RUN: env LLVM_PROFILE_FILE="incorrect-profile-name%m%c%c.profraw" %run %t.exe
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// RUN: ls -l | FileCheck %s
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// CHECK: default.profraw
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// CHECK-NOT: incorrect-profile-name.profraw
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#include <stdio.h>
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int f() { return 0; }
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int main(int argc, char **argv) {
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FILE *File = fopen("default.profraw", "w");
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f();
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return 0;
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}
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